05256–15

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–421

586

Author:

Date:

2004 COROLLA (RM1037U)

SUPPLEMENTAL RESTRAINT SYSTEM (Apr., 2003)

HOW TO PROCEED WITH TROUBLESHOOTING

The hand–held tester can be used at step 4, 6, 8 and 9.

1

VEHICLE BROUGHT TO WORKSHOP

2

CUSTOMER PROBLEM ANALYSIS (See page

05–423

)

3

WARNING LIGHT CHECK (See page

05–424

)

4

THE DTCs CHECK (Present and Past DTCs) (See page

05–424

)

DTCs IS OUTPUT (INCLUDING NORMAL SYS-
TEM CODE): Go to step 5

DTCs IS NOT OUTPUT: PROBLEM SYMPTOMS
TABLE (See page

05–436

)

5

THE DTCs CHART (See page

05–430

)

6

CIRCUIT INSPECTION (See page

05–437

to

05–579

)

TROUBLE CODE IS OUTPUT: Go to step 7

NORMAL SYSTEM CODE IS OUTPUT: Go to step
11

7

REPAIR

8

CLEAR THE DTCs (Present and Past DTCs) (See page

05–424

)

05–422

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

587

Author:

Date:

2004 COROLLA (RM1037U)

9

THE DTCs CHECK (Present and Past DTCs) (See page

05–424

)

DTCs IS NOT OUTPUT: Go to step 10

DTCs IS OUTPUT: Go to step 5

10

SYMPTOM SIMULATION (See page

01–20

)

WARNING LIGHT REMAINS OFF: Go to step 11

WARNING LIGHT IS ON: Go to step 5

11

CONFIRMATION TEST

END

05257–12

[

]

[

]

[

]

H40122

Supplemental Restraint System Check Sheet

Inspector’s
Name

Date Vehicle Brought In

Registration No.

Registration Year

Frame No.

Odometer Reading

km
Miles

Date Problem Occurred

Weather

Temperature

Fine

Cloudy

Rainy

Snowy

Other

Approx.

Starting

Idling

Driving

Constant speed

Acceleration

Deceleration

Other

Vehicle Operation

Road Condition

Details Of Problem

Vehicle Inspection, Repair Histo-
ry Prior to Occurrence of Mal-
function (Including Supplemen-
tal Restraint System)

Diagnosis System Inspection

SRS Warning Light
Inspection

DTC Inspection

1st Time

2nd Time

Remains ON

Does Not Light Up

Normal Code

Malfunction Code

Code.

Customer’s Name

1st Time

2nd Time

Sometimes Lights Up

Remains ON

Does Not Light Up

Sometimes Lights Up

Normal Code

Malfunction Code

Code.

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–423

588

Author:

Date:

2004 COROLLA (RM1037U)

CUSTOMER PROBLEM ANALYSIS CHECK

05258–08

C93955

H40173

CG

Tc

05–424

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

589

Author:

Date:

2004 COROLLA (RM1037U)

PRE–CHECK

1.

SRS WARNING LIGHT CHECK

(a)

Turn the ignition switch to the ON position and check that
the SRS warning light lights up.

(b)

Check that the SRS warning light goes out after approx.
6 seconds.

HINT:

When the ignition switch is at ON and the SRS warning
light remains on or flashes, the airbag sensor assembly
has detected a malfunction code.

If, after approx. 6 second have elapsed, the SRS warning
light sometimes lights up, a short in the SRS warning light
circuit can be considered likely. Proceed to ”SRS warning
light circuit malfunction” on page

05–585

and

05–588

.

2.

DTC CHECK ( using diagnosis check wire)

(a)

Present troubles codes:
Output the DTC.
(1)

Turn the ignition switch to the ON position and wait
for approx. 60 seconds.

(2)

Using SST, connect terminals Tc and CG of the
DLC3.

SST

09843–18040

NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.
(b)

Past troubles codes:
Output the DTC.
(1)

Using service wire, connect terminals Tc and CG of
the DLC3.

SST

09843–18040

(2)

Turn the ignition switch to the ON position and wait
for approx. 60 seconds.

NOTICE:
Pay due attention to the terminal connecting position to
avoid a malfunction.

H13050

Normal Code (w/o Past Trouble Code)

Normal Code (w/ Past Trouble Code)

Malfunctioning Code
(Example Code 11 and 31)

0.25

ON

OFF

0.75

0.25

0.25

ON

OFF

0.5

2.5

4.0

1.5

0.5

Repeat

DTC31

DTC11

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–425

590

Author:

Date:

2004 COROLLA (RM1037U)

(c)

Read the DTC.
Read the 2–digit DTC as indicated by the number of times
the SRS warning light blinks. As an example, the blinking
patterns, normal, 11 and 31 are shown in the illustration.

Normal code indication (w/o past trouble
code)
The light will blink 2 times per second.

Normal code indication (w/ past trouble code)
When the past troubles code is stored in the
airbag sensor assembly, the light blinks only
ones a second.

Malfunction code indication
The first blinking output indicates the first digit
of a 2–digit DTC. After a 1.5–second pause,
the second blinking output will indicate the
second digit.

If there are 2 or more codes, there will be a 2.5–second pause
between each code. After all the codes have been output, there
will be a 4.0–second pause and they will all be repeated.
HINT:
In the event of a number of trouble codes, indication will start
from the smallest numbered code.

3.

DTC CHECK (Using hand–held tester)

(a)

Hook up the hand–held tester to the DLC3.

(b)

Read the DTCs by following the prompts on the tester screen.

HINT:
Please refer to the hand–held tester operator’s manual for further details.
4.

DTC CLEARANCE (Not using service wire)

(a)

When the ignition switch is turned off, the diagnostic trouble code is cleared.

HINT:
DTC might not be cleared by turning the ignition switch OFF. In this case, proceed to the next step.
5.

DTC CLEARANCE (Using service wire)

(a)

Using a service wire, connect terminals TC and CG of the DLC3.

(b)

Disconnect terminal TC of DLC3 within 10 seconds after the DTC begins to be output, and check if
the warning light lights up within 3 seconds.

(c)

Within 2.0 seconds to 4.0 seconds after the SRS warning light lights up, connect the terminals TC and
CG of the DLC3.

(d)

Light the SRS warning light goes off 2.0 to 4.0 seconds after connecting the terminals TC and CG of
DLC3, then disconnect the terminal TC of the DLC3 2.0 to 4.0 seconds after the warning light goes
off.

(e)

Light the SRS warning light on again 3 seconds after disconnecting terminal TC of DLC3, then within
2.0 to 4.0 seconds after the lighting, connect terminals TC and CG of the DLC3.

(f)

Check if the SRS warning light goes off 2.0 to 4.0 seconds after connecting terminals TC and CG of
DLC3, and the correct code is output 1 second after the SRS warning goes off.

H41917

T1: 0 –

∞

second

IG S/W

DLC3

SRS Warning

ON

OFF

Open

Short

0.5 sec.

1.5 sec.

T1

0.25 sec.

T2: approx. 6 second
T3: 3 – 5 second

T7: within 1 second

*: The past trouble code in the illustration shows DTC 21 as an example.

T4: 3 – 10 second
T5: 2 – 4 second
T6: 1 – 5 second

T2

T3

T4

T5 T6 T5 T6 T5 T6 T5 T7

0.5 sec.

0.25 sec.

CG

TC

Light (*)

05–426

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

591

Author:

Date:

2004 COROLLA (RM1037U)

If DTCs are to cleared, repeat the above procedure until the codes are cleared.

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–427

592

Author:

Date:

2004 COROLLA (RM1037U)

6.

DTC CLEARANCE (Using hand–held tester)

(a)

Hook up the hand–held tester to the DLC3.

(b)

Clear the DTCs by following the prompts on the tester screen.

HINT:
Please refer to the hand–held tester operation’s manual for further details.
7.

RELEASE METHOD OF AIRBAG ACTIVATION PREVENTION MECHANISM

(a)

An airbag activention prevention mechanism is built into the connector for the squib circuit of the SRS.
When release of the airbag activation prevention mechanism is directed in the troubleshooting proce-
dure, as shown in the illustration of the connectors on the next pages, insert paper which has the same
thickness as the male terminal between the terminal and the short spring.

CAUTION:
Never release the airbag activation prevention mechanism on the squib connector.
NOTICE:

Do not release the airbag activation prevention mechanism unless specifically directed by the
troubleshooting procedure.

If the inserted paper is too thick the terminal and short spring may be damaged, so always use
paper with the same thickness as the male terminal.

H41916

Airbag
Sensor
Assy Center

Front Airbag Sensor (LH)

Side Airbag
Sensor Assy (LH)

Spiral Cable Sub–Assy

Horn Button
Assy (Squib)

Instrument Panel
Passenger Airbag
Assy (Squib)

Front Seat Airbag
Assy (LH) (Squib)

Seat Belt
Pretensioner (LH)

Front Airbag Sensor (RH)

Seat Belt
Pretensioner (RH)

Front Seat Airbag
Assy (RH) (Squib)

Side Airbag
Sensor Assy (RH)

15

5

6

13

11

9

8

7

10

12

4

14

16

3

1

2

05–428

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

593

Author:

Date:

2004 COROLLA (RM1037U)

H41995

Airbag Sensor Assy Center Connector

Short Spring

Short Spring

Short Spring

Before Release

After Release

Paper

Before Release

After Release

Paper

Before Release

After Release

Paper

Short Spring

Short Spring

Connector

6

Connector

8

Short Spring

Short Spring

Connector

Before Release

After Release

Paper

1

2

3

4

15

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–429

594

Author:

Date:

2004 COROLLA (RM1037U)

05259–14

05–430

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

595

Author:

Date:

2004 COROLLA (RM1037U)

DIAGNOSTIC TROUBLE CODE CHART

DTC No.

(See page)

Detection Item

Trouble Area

SRS

Warning Light

B0100/13

(

05–437

)

SHORT IN D SQUIB CIRCUIT

Horn button assy (squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

ON

B0101/14

(

05–441

)

OPEN IN D SQUIB CIRCUIT

Horn button assy (squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

ON

B0102/11

(

05–445

)

SHORT IN D SQUIB CIRCUIT
(TO GROUND)

Horn button assy (squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

ON

B0103/12

(

05–449

)

SHORT IN D SQUIB CIRCUIT
(TO B+)

Horn button assy (squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

ON

B0105/53

(

05–453

)

SHORT IN P SQUIB CIRCUIT

Instrument panel passenger airbag assy (squib)

Airbag sensor assy center

Instrument panel wire

ON

B0106/54

(

05–457

)

OPEN IN P SQUIB CIRCUIT

Instrument panel passenger airbag assy (squib)

Airbag sensor assy center

Instrument panel wire

ON

B0107/51

(

05–460

)

SHORT IN P SQUIB CIRCUIT
(TO GROUND)

Instrument panel passenger airbag assy (squib)

Airbag sensor assy center

Instrument panel wire

ON

B0108/52

(

05–463

)

SHORT IN P SQUIB CIRCUIT
(TO B+)

Instrument panel passenger airbag assy (squib)

Airbag sensor assy center

Instrument panel wire

ON

B0110/43

(

05–466

)

SHORT IN SIDE SQUIB (RH) CIR-
CUIT

Front seat airbag assy RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0111/44

(

05–469

)

OPEN IN SIDE SQUIB (RH) CIRCUIT

Front seat airbag assy RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0112/41

(

05–472

)

SHORT IN SIDE SQUIB (RH)
CIRCUIT (TO GROUND)

Front seat airbag assy RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0113/42

(

05–475

)

SHORT IN SIDE SQUIB (RH)
CIRCUIT (TO B+)

Front seat airbag assy RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0115/47

(

05–478

)

SHORT IN SIDE SQUIB (LH)
CIRCUIT

Front seat airbag assy LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0116/48

(

05–481

)

OPEN IN SIDE SQUIB (LH) CIRCUIT

Front seat airbag assy LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0117/45

(

05–484

)

SHORT IN SIDE SQUIB (LH)
CIRCUIT (TO GROUND)

Front seat airbag assy LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0118/46

(

05–487

)

SHORT IN SIDE SQUIB (LH)
CIRCUIT (TO B+)

Front seat airbag assy LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0126/B0127/

27

(

05–490

)

SEAT BELT BUCKLE SWITCH (LH)
MALFUNCTION

Front seat inner belt assy (LH)

Airbag sensor assy center

Instrument panel wire No.3

ON

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–431

596

Author:

Date:

2004 COROLLA (RM1037U)

B0130/63

(

05–494

)

SHORT IN P/T SQUIB (RH) CIRCUIT

Seat belt pretensioner RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0131/64

(

05–498

)

OPEN IN P/T SQUIB (RH) CIRCUIT

Seat belt pretensioner RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0132/61

(

05–501

)

SHORT IN P/T SQUIB (RH) CIRCUIT
(TO GROUND)

Seat belt pretensioner RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0133/62

(

05–504

)

SHORT IN P/T SQUIB (RH) CIRCUIT
(TO B+)

Seat belt pretensioner RH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0135/73

(

05–507

)

SHORT IN P/T SQUIB (LH) CIRCUIT

Seat belt pretensioner LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0136/74

(

05–511

)

OPEN IN P/T SQUIB (LH) CIRCUIT

Seat belt pretensioner LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0137/71

(

05–514

)

SHORT IN P/T SQUIB (LH) CIRCUIT
(TO GROUND)

Seat belt pretensioner LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B0138/72

(

05–517

)

SHORT IN P/T SQUIB (LH) CIRCUIT
(TO B+)

Seat belt pretensioner LH (squib)

Airbag sensor assy center

Instrument panel wire No.3

Blink

B1100/31

(

05–520

)

AIRBAG SENSOR ASSY CENTER
MALFUNCTION

Airbag sensor assy center

ON

B1135/24

(

05–522

)

HALF CONNECTION DETECTION
MALFUNCTION

Airbag sensor assy center

ON

B1140/32

(

05–524

)

SIDE AIRBAG SENSOR ASSY (RH)
MALFUNCTION

Airbag sensor assy center

Side Airbag sensor assy RH

Instrument panel wire No.3

Blink

B1141/33

(

05–529

)

SIDE AIRBAG SENSOR ASSY (LH)
MALFUNCTION

Airbag sensor assy center

Side Airbag sensor assy LH

Instrument panel wire No.3

Blink

B1153/25

(

05–534

)

SEAT POSITION AIRBAG SENSOR
ASSY MALFUNCTION

Seat position airbag sensor

Airbag sensor assy center

Instrument panel wire No.3

Wire harness (Seat position airbag sensor – Front seat inner
belt assy)

ON

B1156/B1157

/15

(

05–542

)

FRONT AIRBAG SENSOR (RH)
MALFUNCTION

Airbag front RH sensor

Airbag sensor assy center

Engine room main Instrument panel wire No.3

Instrument panel wire

ON

B1158/B1159

/16

(

05–548

)

FRONT AIRBAG SENSOR (LH)
MALFUNCTION

Airbag sensor front LH

Airbag sensor assy center

Engine room main Instrument panel wire No.3

Instrument panel wire

ON

B1180/17

(

05–554

)

SHORT IN D SQUIB (2ND STEP)
CIRCUIT

Horn button assy (D squib (2nd step))

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire No.3

ON

B1181/18

(

05–558

)

OPEN IN D SQUIB (2ND STEP)
CIRCUIT

Horn button assy (D squib (2nd step))

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire No.3

ON

B1182/19

(

05–562

)

SHORT IN D SQUIB (2ND STEP)
CIRCUIT (TO GROUND)

Horn button assy (D squib (2nd step))

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire No.3

ON

05–432

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

597

Author:

Date:

2004 COROLLA (RM1037U)

B1183/22

(

05–566

)

SHORT IN D SQUIB (2ND STEP)
CIRCUIT (TO B+)

Horn button assy (D squib (2nd step))

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire No.3

ON

B1185/57

(

05–570

)

SHORT IN P SQUIB (2ND STEP)
CIRCUIT

Instrument panel passenger airbag assy (P squib (2nd step))

Airbag sensor assy center

Instrument panel wire

ON

B1186/58

(

05–573

)

OPEN IN P SQUIB (2ND STEP)
CIRCUIT

Instrument panel passenger airbag assy (P squib (2nd step))

Airbag sensor assy center

Instrument panel wire

ON

B1187/55

(

05–576

)

SHORT IN P SQUIB (2ND STEP)
CIRCUIT (TO GROUND)

Instrument panel passenger airbag assy (P squib (2nd step))

Airbag sensor assy center

Instrument panel wire

ON

B1188/56

(

05–579

)

SHORT IN P SQUIB (2ND STEP)
CIRCUIT (TO B+)

Instrument panel passenger airbag assy (P squib (2nd step))

Airbag sensor assy center

Instrument panel wire

ON

Normal

SYSTEM NORMAL

–

OFF

Normal

(

05–582

)

VOLTAGE SOURCE DROP

Battery

Airbag sensor assy center

ON

HINT:

When the SRS warning light remains lit up and the DTC is the normal code, this means a voltage source
drops.
This malfunction is not stored in memory by the Airbag sensor assy center and if the power source
voltage returns to normal, the SRS warning light will automatically go out.

When 2 or more codes are indicated, the codes will be displayed in numeral order starting from the
lowest numbered code.

If a code not listed on the chart is displayed, the Airbag sensor assy center is faulty.

In the case of any malfunction concerning any open circuit, ground short, or B+ short due to any squib,
another malfunction code may not be detected. In this case, correct the malfunction currently being
output, and then perform malfunction diagnosis again. Another malfunction code may then be de-
tected.

0525A–13

H41998

Instrument Panel Passenger Airbag Assy

Airbag Sensor
Front LH

Combination Meter (Warning Light)

Airbag Front RH Sensor

Spiral Cable Sub–Assy

Horn Button Assy (w/ Airbag)

Airbag Sensor Assy Center

Seat Belt Pretensioner RH

Side Airbag Sensor Assy LH

Side Airbag Sensor Assy RH

Seat Belt Pretensioner LH

Front Seat Airbag Assy LH

Front Seat Airbag Assy RH

DLC3

Seat Position Airbag Sensor

Seat Belt Buckle Switch LH

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–433

598

Author:

Date:

2004 COROLLA (RM1037U)

LOCATION

05DQA–01

H40028

A12

A13

A14

05–434

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

599

Author:

Date:

2004 COROLLA (RM1037U)

TERMINALS OF ECU

No.

Symbol

Terminal Name

A

–

Electrical Connector Check Mechanism

B

–

Electrical Connector Check Mechanism

A13–3

LA

SRS Warning Light

A13–5

IG2

Power Source (IG2 Fuse)

A13–7

P2–

Squib (Passenger (2 step))

A13–8

P2+

Squib (Passenger (2 step))

A13–9

+SR

Front Airbag Sensor (RH)

A13–10

P+

Squib (Passenger)

A13–11

P–

Squib (Passenger)

A13–12

SIL

Diagnosis

A13–13

D–

Squib (Driver)

A13–14

D+

Squib (Driver)

A13–15

+SL

Airbag Front Sensor (LH)

A13–16

D2+

Squib (Driver (2 step))

A13–17

D2–

Squib (Driver (2 step))

A13–19

Tc

Diagnosis

A13–20

–SR

Airbag Front Sensor (RH)

A13–23

GSW2

ECM

A13–26

–SL

AIrbag Front Sensor (LH)

A13–27

E1

Ground

A13–28

E2

Ground

A12–1

PL–

Squib (Seat Belt Pretensioner, LH)

A12–2

PL+

Squib (Seat Belt Pretensioner, LH)

A12–3

LSP+

Seat Position Sensor

A12–4

LSP–

Seat Position Sensor

A12–5

SFL–

Squib (Side, LH)

A12–6

SFL+

Squib (Side, LH)

A12–7

VUPL

Side Airbag Sensor Assy (LH)

A12–9

SSL–

Side Airbag Sensor Assy (LH)

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–435

600

Author:

Date:

2004 COROLLA (RM1037U)

No.

Terminal Name

Symbol

A12–10

FSL

Side Airbag Sensor Assy (LH)

A12–11

LBE+

Seat Belt Buckle Switch (LH)

A12–12

ESL

Side Airbag Sensor Assy (LH)

A14–1

SFR+

Squib (Side, RH)

A14–2

SFR–

Squib (Side, RH)

A14–5

PR+

Squib (Seat Belt Pretensioner, RH)

A14–6

PR–

Squib (Seat Belt Pretensioner, RH)

A14–7

ESR

Side Airbag Sensor Assy (RH)

A14–9

FSR

Side Airbag Sensor Assy (RH)

A14–10

SSR–

Side Airbag Sensor Assy (RH)

A14–12

VUPR

Side Airbag Sensor Assy (RH)

0525C–13

05–436

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

601

Author:

Date:

2004 COROLLA (RM1037U)

PROBLEM SYMPTOMS TABLE

HINT:
Proceed with troubleshooting of each circuit in the table below.

Symptom

Suspect Area

See page

When the ignition switch is in the ON position, the SRS warning
light sometimes comes on after approximately 6 seconds.

SRS warning light circuit malfunction

05 585

SRS warning light always comes on even when DTC is not out-
put.

SRS warning light circuit malfunction
(Always lights up, when DTC is not output).

05–585

With the ignition switch is in the ON position, the SRS warning
light does not come on.

SRS warning light circuit malfunction
(Does not light up, when ignition switch is turned to ON).

05–588

Although a SRS warning light operates normally, DTC or a nor-
mal system code is not displayed.

TC terminal circuit

05 590

Although the terminals TC and CG are not connected, DTC or a
normal system code are displayed.

TC terminal circuit

05–590

H01451

Airbag Sensor Assy Center

A16
D Squib

Spiral Cable
Sub–Assy

Y

Y–B

D+

D–

1

A13

2

A13

13

14

D+

D–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–437

602

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0100/13 SHORT IN D SQUIB CIRCUIT

CIRCUIT DESCRIPTION

The D squib circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn button assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0100/13 is recorded when a short is detected in the D squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0100/13

Short circuit between D+ wire harness and D– wire har-
ness of squib

D squib malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

055Y1–04

H01001

C91344

H41439

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

H01002

H10600 H40103

H40030

D Squib

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B0100/13

Spiral

Cable

Sub–Assy

05–438

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

603

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the horn button assy.

(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy (See page

05–424

).

(d)

For the connector (on the spiral cable sub–assy side) be-
tween the horn button assy and the spiral cable sub–assy,
measure the resistance between D+ and D–.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 4

OK

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B0100/13 is not output.

HINT:
Codes other than code B0100/13 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003

H10600 H40103

H40031

D Squib

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B0100/13

Spiral

Cable

Sub–Assy

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–439

604

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0100/13 is not output.

HINT:
Codes other than code B0100/13 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

USE SIMULATION METHOD TO CHECK

H01004

H41424

H41440

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

H01000

C91344

H41441

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

05–440

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

605

Author:

Date:

2004 COROLLA (RM1037U)

4

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Disconnect the connector of the instrument panel wire.

(b)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy (See page

05–424

).

(c)

For the connector (on the spiral cable sub–assy side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy, measure the resistance between D+ and D–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

5

CHECK SPIRAL CABLE SUB–ASSY

(a)

Release the airbag activation prevention mechanism of
the spiral cable sub–assy connector on the airbag sensor
assy center side (See page

05–424

).

(b)

For the orange connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D+ and D–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

USE SIMULATION METHOD TO CHECK

H01001

C91344

H41439

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–441

606

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0101/14 OPEN IN D SQUIB CIRCUIT

CIRCUIT DESCRIPTION

The D squib circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn button assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0101/14 is recorded when an open is detected in the D squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0101/14

Open circuit in D+ wire harness or D– wire harness of squib

D squib malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–437

.

INSPECTION PROCEDURE

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the horn button assy
and the airbag sensor assy center.

(c)

For the orange connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D+ and D–.
OK:
Resistance: Below 1

Ω

NG

Go to step 4

OK

055Y2–04

H01002
H10600

C91348

W02044

H42104

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

DLC3

CG

Tc

DTC B0101/14

05–442

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

607

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect D+ and D– of the orange
connector (on the spiral cable sub–assy side) between
the horn button assy and the spiral cable sub–assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0101/14 is not output.

HINT:
Codes other than code B0101/14 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003

H10600 W02044

H40036

D Squib

DLC3

DTC B0101/14

CG

Tc

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

H01004

H41424

H41440

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–443

608

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0101/14 is not output.

HINT:
Codes other than code B0101/14 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

USE SIMULATION METHOD TO CHECK

4

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Disconnect the connector of the instrument panel wire.

(b)

For the connector (on the spiral cable sub–assy side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy, measure the resistance between D+ and D–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

H01000

C91344

H41441

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

05–444

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

609

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK SPIRAL CABLE SUB–ASSY

(a)

For the orange connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D+ and D–.
OK:
Resistance: Below 1

Ω

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

USE SIMULATION METHOD TO CHECK

H01001

C91344

H41439

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–445

610

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0102/11 SHORT IN D SQUIB CIRCUIT (TO GROUND)

CIRCUIT DESCRIPTION

The D squib circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn button assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0102/11 is recorded when a ground short is detected in the D squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0102/11

Short circuit in D squib wire harness (to ground)

D squib malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–437

.

INSPECTION PROCEDURE

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the horn button assy.

(c)

For the orange connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D+ and body
ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 5

OK

0525F–14

H01002

C91348

H10600 W02042

H42105

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

DLC3

CG

Tc

DTC B0102/11

05–446

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

611

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect D+ and D– of the orange
connector (on the spiral cable sub–assy side) between
the horn button assy and the spiral cable sub–assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait t least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0102/11 is not output.

HINT:
Codes other than code B0102/11 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003
H10600 W02042

H40037

D Squib

DLC3

DTC B0102/11

CG

Tc

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–447

612

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0102/11 is not output.

HINT:
Codes other than code B0102/11 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01004

H41424

H41440

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

H01000

C91344

H41441

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

05–448

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

613

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Disconnect the connector of the instrument panel wire.

(b)

For the connector (on the spiral cable sub–assy side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy, measure the resistance between D+ and body
ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

6

CHECK SPIRAL CABLE SUB–ASSY

(a)

For the orange connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D+ and body
ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

7

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01001

C91344

H41439

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–449

614

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0103/12 SHORT IN D SQUIB CIRCUIT (TO B+)

CIRCUIT DESCRIPTION

The D squib circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn button assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0103/12 is recorded when a B+ short is detected in the D squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0103/12

Short circuit in D squib wire harness (to B+)

D squib malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–437

.

INSPECTION PROCEDURE

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the horn button assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the orange connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the voltage between D+ and body
ground.
OK:
Voltage: Below 1 V

NG

Go to step 5

OK

0525G–13

H01002

C91348

H10600 W02043

H42106

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

DLC3

CG

Tc

DTC B0103/12

05–450

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

615

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect D+ and D– of the orange
connector (on the spiral cable sub–assy side) between
the horn button assy and the spiral cable sub–assy.

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 60 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B0103/12 is not output.

HINT:
Codes other than code B0103/12 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003

H10600 W02043

H40038

D Squib

DLC3

DTC B0103/12

CG

Tc

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–451

616

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0103/12 is not output.

HINT:
Codes other than code B0103/12 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01004

H41424

H41440

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

H01000

C91344

H41441

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Orange

05–452

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

617

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the connectors of the instrument panel wire.

(c)

Turn the ignition switch to ON.

(d)

For the connector (on the spiral cable sub–assy side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy, measure the voltage between D+ and body
ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

6

CHECK SPIRAL CABLE SUB–ASSY

(a)

For the orange connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the voltage between D+ and body
ground.
OK:
Voltage: Below 1 V

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

7

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01454

A15
P Squib

Airbag Sensor Assy Center

Y–R

Y–G

1

2

10

P+

A13

P–

11

A13

P+

P–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–453

618

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0105/53 SHORT IN P SQUIB CIRCUIT

CIRCUIT DESCRIPTION

The P squib circuit consists of the airbag sensor assy center and instrument panel passenger airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0105/53 is recorded when a short is detected in the P squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0105/53

Short circuit between P+ wire harness and P– wire
harness of squib.

P squib malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

055Y3–04

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P+

P–

05–454

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

619

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

HINT:
Make sure that the connector is not damaged (The lock button
is not disengaged, or the claw of the lock is not deformed or
damaged). If the damage is found, replace the wire harness.
(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the instrument
panel passenger airbag assy (See page

05–424

).

(d)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the resistance between P+ and P–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

H01023
H10600 H01077

H41933

P Squib

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B0105/53

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–455

620

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B0105/53 is not output.

HINT:
Codes other than code B0105/53 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600 H01077

H01024

H40041

P Squib

DTC B0105/53

DLC3

CG

Tc

Airbag
Sensor
Assy
Center

05–456

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

621

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0105/53 is not output.

HINT:
Codes other than code B0105/53 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

USE SIMULATION METHOD TO CHECK

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P+

P–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–457

622

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0106/54 OPEN IN P SQUIB CIRCUIT

CIRCUIT DESCRIPTION

The P squib circuit consists of the airbag sensor assy center and instrument panel passenger airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0106/54 is recorded when an open is detected in the P squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0106/54

Open circuit in P+ wire harness or P– wire harness of
squib

P squib malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–453

.

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

(c)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the resistance between P+ and P–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

055Y4–04

H01023

H10600 H01078

H16855

H41934

P Squib

Airbag
Sensor
Assy
Center

DLC3

DTC B0106/54

CG

Tc

05–458

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

623

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect P+ and P– of the connector
(on the instrument panel passenger airbag assy side) be-
tween the airbag sensor assy center and the instrument
panel passenger airbag assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0106/54 is not output.

HINT:
Codes other than code B0106/54 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600 H01078

H01024

H40043

DTC B0106/54

DLC3

CG

Tc

Airbag
Sensor
Assy
Center

P Squib

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–459

624

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0106/54 is not output.

HINT:
Codes other than code B0106/54 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

USE SIMULATION METHOD TO CHECK

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P+

P–

05–460

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

625

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0107/51 SHORT IN P SQUIB CIRCUIT (TO GROUND)

CIRCUIT DESCRIPTION

The P squib circuit consists of the airbag sensor assy center and instrument panel passenger airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0107/51 is recorded when ground short is detected in the P squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0107/51

Short circuit in P squib wire harness (to ground)

P squib malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–453

.

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

(c)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the resistance between P+ and body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

0525J–13

H01023

H10600 H01075

H16855

H41977

P Squib

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B0107/51

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–461

626

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect P+ and P– of the connector
(on the instrument panel passenger airbag assy side) be-
tween the airbag sensor assy center and the instrument
panel passenger airbag assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0107/51 is not output.

HINT:
Codes other than code B0107/51 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01024

H01075

H40045

P Squib

DTC B0107/51

DLC3

CG

Tc

Airbag
Sensor
Assy
Center

05–462

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

627

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0107/51 is not output.

HINT:
Codes other than code B0107/51 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P+

P–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–463

628

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0108/52 SHORT IN P SQUIB CIRCUIT (TO B+)

CIRCUIT DESCRIPTION

The P squib circuit consists of the airbag sensor assy center and instrument panel passenger airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0108/52 is recorded when a B+ short is detected in the P squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0108/52

Short circuit in P squib wire harness (to B+)

P squib malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–453

.

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the voltage between P+ and body ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

0525K–13

H01023

H10600 H01076

H16855

H41978

P Squib

Airbag
Sensor
Assy
Center

DTC B0108/52

DLC3

CG

Tc

05–464

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

629

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect P+ and P– of the connector
(on the instrument panel passenger airbag assy side) be-
tween the airbag sensor assy center and the instrument
panel passenger airbag assy.

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B0108/52 is not output.

HINT:
Codes other than code B0108/52 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01024

H01076

H40047

P Squib

DLC3

CG

Tc

DTC B0108/52

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–465

630

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0108/52 is not output.

HINT:
Codes other than code B0108/52 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01454

S7
Side Squib (RH)

Airbag Sensor Assy Center

SFR+

SFR–

Y–R

Y–G

1

2

2

1

A14

A14

05–466

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

631

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0110/43 SHORT IN SIDE SQUIB (RH) CIRCUIT

CIRCUIT DESCRIPTION

The side squib (RH) circuit consists of the airbag sensor assy center and front seat airbag assy (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0110/43 is recorded when a short is detected in the side squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0110/43

Short circuit between SFR+ wire harness and SFR– wire
harness of squib

Side squib (RH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

055Y5–05

H01019

C82598

H40977

Side Squib (RH)

Airbag
Sensor
Assy
Center

SFR+

SFR–

H01020

H10600 H01069

H42111

Side Squib (RH)

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B0110/43

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–467

632

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(RH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the front seat airbag
assy (RH) and the airbag sensor assy center.

(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the front seat
airbag assy (RH) (See page

05–424

).

(d)

For the connector (on the front seat airbag assy side) be-
tween the airbag sensor assy center and the front seat
airbag assy (RH), measure the resistance between SFR+
and SFR–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT AIRBAG ASSY RH)

OK

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the the connector to the airbag sensor assy cen-
ter.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B0110/43 is not output.

HINT:
Codes other than code B0110/43 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01021

H10600 H01069

H40979

Side Squib (RH)

DLC3

DTC B0110/43

Tc

CG

Airbag
Sensor
Assy
Center

05–468

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

633

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front seat airbag assy (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0110/43 is not output.

HINT:
Codes other than code B0110/43 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

USE SIMULATION METHOD TO CHECK

H01019

C82598

H40977

Side Squib (RH)

Airbag
Sensor
Assy
Center

SFR+

SFR–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–469

634

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0111/44 OPEN IN SIDE SQUIB (RH) CIRCUIT

CIRCUIT DESCRIPTION

The side squib (RH) circuit consists of the airbag sensor assy center and front seat airbag assy (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0111/44 is recorded when an open is detected in the side squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0111/44

Open circuit in SFR+ wire harness or SFR– wire harness
of squib

Side squib (RH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–466

.

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(RH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat airbag assy (RH).

(c)

For the connector (on the front seat airbag assy

side) be-

tween the airbag sensor assy center and the front seat
airbag assy (RH), measure the resistance between SFR+
and SFR–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT AIRBAG ASSY RH)

OK

055Y9–04

H01020

H16278

H10600 H01070

H40980

Side Squib (RH)

DTC B0111/44

DLC3

CG

Tc

Airbag
Sensor
Assy
Center

05–470

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

635

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect SFR+ and SFR– of the con-
nector (on the front seat airbag assy side) between the
airbag sensor assy center and the front seat airbag assy
(RH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0111/44 is not output.

HINT:
Codes other than code B0111/44 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01021

H10600 H01070

H40981

Side Squib (RH)

DTC B0111/44

DLC3

CG

Tc

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–471

636

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front seat airbag assy (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0111/44 is not output.

HINT:
Codes other than code B0111/44 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

USE SIMULATION METHOD TO CHECK

H01019

C82598

H41450

Airbag
Sensor
Assy
Center

Side Squib (RH)

05–472

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

637

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0112/41 SHORT IN SIDE SQUIB (RH) CIRCUIT (TO

GROUND)

CIRCUIT DESCRIPTION

The side squib (RH) circuit consists of the airbag sensor assy center and front seat airbag assy (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0112/41 is recorded when ground short is detected in the side squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0112/41

Short circuit in side squib (RH) wire harness (to ground)

Side squib (RH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–466

.

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(RH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat airbag assy (RH).

(c)

For the connector (on the front seat airbag assy side) be-
tween the airbag sensor assy center and the front seat
airbag assy (RH), measure the resistance between SFR+
and body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT AIRBAG ASSY RH)

OK

0525N–12

H01020

H16278

H10600 H01067

H42112

Side Squib (RH)

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B0112/41

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–473

638

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect SFR+ and SFR– of the con-
nector (on the front seat airbag assy side) between the
airbag sensor assy center and the front seat airbag assy
(RH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0112/41 is not output.

HINT:
Codes other than code B0112/41 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01021

H10600 H01067

H40983

DTC B0112/41

Tc

CG

Side Squib (RH)

DLC3

Airbag
Sensor
Assy
Center

05–474

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

639

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front seat airbag assy (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0112/41 is not output.

HINT:
Codes other than code B0112/41 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01019

C82598

H40977

Side Squib (RH)

Airbag
Sensor
Assy
Center

SFR+

SFR–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–475

640

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0113/42 SHORT IN SIDE SQUIB (RH) CIRCUIT (TO

B+)

CIRCUIT DESCRIPTION

The side squib (RH) circuit consists of the airbag sensor assy center and front seat airbag assy (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0113/42 is recorded when a B+ short is detected in the side squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0113/42

Short circuit in side squib (RH) wire harness (to B+)

Side squib (RH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–466

.

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(RH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat airbag assy (RH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the front seat airbag assy side) be-
tween the airbag sensor assy center and the front seat
airbag assy (RH), measure the voltage between SFR+
and body ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT AIRBAG ASSY RH)

OK

0525O–13

H01020

H16278

H10600 H01068

H42113

Side Squib (RH)

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B0113/42

05–476

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

641

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect SFR+ and SFR– of the con-
nector (on the front front seat airbag assy side) between
the airbag sensor assy center and the front seat airbag
assy (RH).

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B0113/42 is not output.

HINT:
Codes other than code B0113/42 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01021

H10600 H01068

H40985

Side Squib (RH)

CG

DTC B0113/42

DLC3

Tc

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–477

642

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front seat airbag assy (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0113/42 is not output.

HINT:
Codes other than code B0113/42 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01454

S6
Side Squib (LH)

Airbag Sensor Assy Center

SFL+

SFL–

Y–R

Y–G

1

2

5

6

A12

A12

05–478

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

643

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0115/47 SHORT IN SIDE SQUIB (LH) CIRCUIT

CIRCUIT DESCRIPTION

The side squib (LH) circuit consists of the airbag sensor assy center and front seat airbag assy (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0115/47 is recorded when a short is detected in the side squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0115/47

Short circuit between SFL+ wire harness and SFL– wire
harness of squib

Side squib (LH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

055YI–04

H01016

C82598

H40986

Side Squib (LH)

Airbag
Sensor
Assy
Center

SFL+

SFL–

H01017

H16278

H10600 H01073

H40987

Side Squib (LH)

DTC B0115/47

DLC3

Tc

CG

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–479

644

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat airbag assy (LH).

(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the front seat
airbag assy (LH) (See page

05–424

).

(d)

For the connector (on the front seat airbag assy side) be-
tween the airbag sensor assy center and the front seat
airbag assy (LH), measure the resistance between SFL+
and SFL–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3

OK

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect SFL+ and SFL– of the con-
nector (on the front seat airbag assy side) between the
airbag sensor assy center and the front seat airbag assy
(LH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0115/47 is not output.

HINT:
Codes other than code B0115/47 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01018

H10600 H01073

H40988

Side Squib (LH)

DTC B0115/47

DLC3

Tc

CG

Airbag
Sensor
Assy
Center

05–480

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

645

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front seat airbag assy (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0115/47 is not output.

HINT:
Codes other than code B0115/47 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

USE SIMULATION METHOD TO CHECK

H01016

C82598

H40986

Side Squib (LH)

Airbag
Sensor
Assy
Center

SFL–

SFL+

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–481

646

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0116/48 OPEN IN SIDE SQUIB (LH) CIRCUIT

CIRCUIT DESCRIPTION

The side squib (LH) circuit consists of the airbag sensor assy center and front seat airbag assy (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0116/48 is recorded when an open is detected in the side squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0116/48

Open circuit in SFL+ wire harness or SFL– wire harness
of squib

Side squib (LH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–478

.

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat airbag assy (LH).

(c)

For the connector (on the front seat airbag assy side) be-
tween the airbag sensor assy center and the front seat
airbag assy (LH), measure the resistance between SFL+
and SFL–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT AIRBAG ASSY LH)

OK

055YJ–04

H01017

H16278

H10600 H01074

H40989

Side Squib (LH)

CG

DTC B0116/48

DLC3

Tc

Airbag
Sensor
Assy
Center

05–482

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

647

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect SFL+ and SFL– of the con-
nector (on the front seat airbag assy side) between the
airbag sensor assy center and the front seat airbag assy
(LH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0116/48 is not output.

HINT:
Codes other than code B0116/48 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01018

H10600 H01074

H40990

DLC3

DTC B0116/48

Tc

CG

Side Squib (LH)

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–483

648

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front seat airbag assy (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0116/48 is not output.

HINT:
Codes other than code B0116/48 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

USE SIMULATION METHOD TO CHECK

H01016

C82598

H40986

Airbag
Sensor
Assy
Center

SFL+

SFL–

Side Squib (LH)

05–484

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

649

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0117/45 SHORT IN SIDE SQUIB (LH) CIRCUIT (TO

GROUND)

CIRCUIT DESCRIPTION

The side squib (LH) circuit consists of the airbag sensor assy center and front seat airbag assy (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0117/45 is recorded when a ground short is detected in the side squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0117/45

Short circuit in side squib (LH) wire harness (to ground)

Side squib (LH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–478

.

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat airbag assy (LH).

(c)

For the connector (on the front seat airbag assy side) be-
tween the airbag sensor assy center and the front seat
airbag assy (LH), measure the resistance between SFL+
and body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT AIRBAG ASSY LH)

OK

0525R–13

H01017

H16278

H10600 H01071

H40991

DLC3

CG

Tc

DTC B0117/45

Airbag
Sensor
Assy
Center

Side Squib (LH)

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–485

650

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect SFL+ and SFL– of the con-
nector (on the front seat airbag assy side) between the
airbag sensor assy center and the front seat airbag assy
(LH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0117/45 is not output.

HINT:
Codes other than code B0117/45 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01018

H10600 H01071

H40992

Tc

Side Squib (LH)

DTC B0117/45

DLC3

CG

Airbag
Sensor
Assy
Center

05–486

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

651

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front front seat airbag assy (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0117/45 is not output.

HINT:
Codes other than code B0117/45 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01016

C82598

H40986

Side Squib (LH)

Airbag
Sensor
Assy
Center

SFL+

SFL–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–487

652

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0118/46 SHORT IN SIDE SQUIB (LH) CIRCUIT (TO

B+)

CIRCUIT DESCRIPTION

The side squib (LH) circuit consists of the airbag sensor assy center and front seat airbag assy (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0118/46 is recorded when a B+ short is detected in the side squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0118/46

Short circuit in side squib (LH) wire harness (to B+)

Side squib (LH) malfunction

Airbag sensor assy center malfunction

Front seat airbag assy (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–478

.

INSPECTION PROCEDURE

1

CHECK SIDE SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT AIRBAG ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat airbag assy (LH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the front seat airbag assy side) be-
tween the airbag sensor assy center and the front seat
airbag assy (LH), measure the voltage between SFL+
and body ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT AIRBAG ASSY LH)

OK

0525S–12

H01017

H16278

H10600 H01072

H40993

Side Squib (LH)

CG

Tc

DTC B0118/46

DLC3

Airbag
Sensor
Assy
Center

05–488

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

653

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect SFL+ and SFL– of the con-
nector (on the front seat airbag assy side) between the
airbag sensor assy center and the front seat airbag assy
(LH).

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B0118/46 is not output.

HINT:
Codes other than code B0118/46 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01018

H10600 H01072

H40994

Side Squib (LH)

DTC B0118/46

DLC3

Tc

CG

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–489

654

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SIDE SQUIB(LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the front seat airbag assy (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0118/46 is not output.

HINT:
Codes other than code B0118/46 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEPARATE TYPE FRONT SEAT
BACK ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H16798

B6
Seat Belt Buckle Switch (LH)

Airbag Sensor Assy Center

11

LBE+

A12

G

2

05–490

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

655

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0126/27 SEAT BELT BUCKLE SWITCH (LH)

MALFUNCTION

DTC

B0127/27 SEAT BELT BUCKLE SWITCH (LH)

MALFUNCTION

CIRCUIT DESCRIPTION

The seat belt buckle switch (LH) circuit consists of the airbag sensor assy center and front seat inner belt
assy (LH).
DTC B0126/B0127/27 is recorded when a malfunction is detected in the seat belt buckle switch (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0126/B0127/27

Short circuit in LBE+ wire harness (to ground)

Short circuit in LBE+ wire harness (to B+)

Open circuit in LBE+ wire harness

Front seat inner belt assy (LH) malfunction

Airbag sensor assy center malfunction

Front seat inner belt assy (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

055YR–05

H01010

C81676

H40447

Airbag
Sensor
Assy
Center

Front Seat
Inner
Belt
Assy LH

LBE+

H01010

C81676

H40447

Airbag
Sensor
Assy
Center

Front Seat
Inner
Belt
Assy LH

LBE+

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–491

656

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK WIRE HARNESS(AIRBAG SENSOR ASSY CENTER – FRONT SEAT INNER
BELT ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the front seat inner belt assy (LH).

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the front seat
inner belt assy (LH), measure the resistance between
LBE+ and body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3 (AIRBAG SENSOR ASSY CENTER –
FRONT SEAT INNER BELT ASSY LH)

OK

2

CHECK WIRE HARNESS(AIRBAG SENSOR ASSY CENTER – FRONT SEAT INNER
BELT ASSY LH)

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON.

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the front seat
inner belt assy (LH), measure the voltage between LBE+
and body ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3 (AIRBAG SENSOR ASSY CENTER –
FRONT SEAT INNER BELT ASSY LH)

OK

H41987

Airbag
Sensor
Assy
Center

Front Seat Inner
Belt Assy LH

LBE+

H41987

Airbag
Sensor
Assy
Center

Front Seat Inner
Belt Assy LH

LBE+

05–492

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

657

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK FRONT SEAT INNER BELT ASSY LH

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector of the front seat inner belt assy
(LH).

(d)

Unlock the seat belt for the front driver’s seat.

(e)

For the connector (on the airbag sensor assy center side),
measure the resistance between LBE+ and body ground.
OK:
Resistance: 1.0 k

Ω

– 1.6 k

Ω

NG

REPLACE FRONT SEAT INNER BELT ASSY LH

OK

4

CHECK FRONT SEAT INNER BELT ASSY LH

(a)

Lock the seat belt for the front driver’s seat.

(b)

For the connector (on the airbag sensor assy center side),
measure the resistance between LBE+ and body ground.
OK:
Resistance: 100

Ω

– 500

Ω

NG

REPLACE FRONT SEAT INNER BELT ASSY LH

OK

C85269

H10600 C85273

H41027

Front Seat Inner
Belt Assy LH

Airbag
Sensor
Assy Center

DTC B0126/B0127/27

DLC3

TC

CG

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–493

658

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B0126/B0127/27 is not output.

HINT:
Codes other than code B0126/B0127/27 may be output at this
time, but they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

USE SIMULATION METHOD TO CHECK

H01454

A14

5

PR+

6

PR–

Y–B

Y

1

2

Airbag Sensor Assy Center

P13
P/T Squib (RH)

A14

05–494

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

659

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0130/63 SHORT IN P/T SQUIB (RH) CIRCUIT

CIRCUIT DESCRIPTION

The P/T squib (RH) circuit consists of the airbag sensor assy center and seat belt pretensioner (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0130/63 is recorded when a short is detected in the P/T squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0130/63

Short circuit between PR+ wire harness and PR– wire
harness of squib

P/T squib (RH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

055YV–05

H01019

C81077

H40048

Airbag
Sensor
Assy
Center

P/T Squib (RH)

PR+

PR–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–495

660

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(RH) CIRCUIT(AIRBAGA SENSOR ASSY CENTER – FRONT
SEAT OUTER BELT ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (RH).

HINT:
Make sure that the connector is not damaged (The lock button
is not disengaged, or the claw of the lock is not deformed or
damaged). If the damage is found, replace the wire harness.
(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (RH) (See page

05–424

).

(d)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (RH), measure the resistance between PR+
and PR–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY RH)

OK

H10600

H01020

H01082

H10600

H01020

H01082

H40049

DLC3

CG

Tc

DTC B0130/63

P/T Squib (RH)

Airbag
Sensor
Assy
Center

05–496

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

661

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B0130/63 is not output.

HINT:
Codes other than code B0130/63 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600 H01082

H01021

H40050

DLC3

CG

Tc

DTC B0130/63

P/T Squib (RH)

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–497

662

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0130/63 is not output.

HINT:
Codes other than code B0130/63 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY RH

OK

USE SIMULATION METHOD TO CHECK

H01019

C81077

H40048

P/T Squib (RH)

Airbag
Sensor
Assy
Center

PR+

PR–

05–498

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

663

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0131/64 OPEN IN P/T (RH) CIRCUIT

CIRCUIT DESCRIPTION

The P/T squib circuit (RH) consists of the airbag sensor assy center and seat belt pretensioner (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0131/64 is recorded when an open is detected in the P/T squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0131/64

Open circuit in PR+ wire harness or PR– wire harness of
squib

P/T squib (RH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–494

.

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(RH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT OUTER BELT ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (RH).

(c)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (RH), measure the resistance between PR+
and PR–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY RH)

OK

055YY–05

H01020

C85243

H10600 H01083

H40951

P/T Squib (RH)

DLC3

CG

Tc

DTC B0131/64

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–499

664

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect PR+ and PR– of the con-
nector (on the seat belt pretensioner side) between the
airbag sensor assy center and the seat belt pretensioner
(RH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0131/64 is not output.

HINT:
Codes other than code B0131/64 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01021

H01083

H40051

P/T Squib (RH)

DLC3

CG

Tc

DTC B0131/64

Airbag
Sensor
Assy
Center

05–500

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

665

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0131/64 is not output.

HINT:
Codes other than code B0131/64 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY RH

OK

USE SIMULATION METHOD TO CHECK

H01019

C81077

H40048

P/T Squib (RH)

PR+

PR–

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–501

666

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0132/61 SHORT IN P/T SQUIB (RH) CIRCUIT (TO

GROUND)

CIRCUIT DESCRIPTION

The P/T squib (RH) circuit consists of the airbag sensor assy center and seat belt pretensioner (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0132/61 is recorded when a ground short is detected in the P/T squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0132/61

Short circuit in P/T squib (RH) wire harness (to ground)

P/T squib (RH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–494

.

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(RH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT OUTER BELT ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (RH).

(c)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (RH), measure the resistance between PR+
and body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY RH)

OK

0525V–14

H01020

C85243

H10600 H01079

H40952

P/T Squib (RH)

DLC3

DTC B0132/61

Tc

CG

Airbag
Sensor
Assy
Center

05–502

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

667

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect PR+ and PR– of the con-
nector (on the seat belt pretensioner side) between the
airbag sensor assy center and the seat belt pretensioner
(RH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0132/61 is not output.

HINT:
Codes other than code B0132/61 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01021

H01079

H40053

Airbag
Sensor
Assy
Center

P/T Squib (RH)

DLC3

DTC B0132/61

Tc

CG

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–503

668

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0132/61 is not output.

HINT:
Codes other than code B0132/61 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY RH

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01019

C81077

H40048

P/T Squib (RH)

PR+

PR–

Airbag
Sensor
Assy
Center

05–504

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

669

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0133/62 SHORT IN P/T SQUIB (RH) CIRCUIT (TO B+)

CIRCUIT DESCRIPTION

The P/T squib (RH) circuit consists of the airbag sensor assy center and seat belt pretensioner (RH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0133/62 is recorded when a B+ short is detected in the P/T squib (RH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0133/62

Short circuit in seat belt pretensioner (RH) wire harness
(to B+)

P/T squib (RH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–494

.

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(RH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT
SEAT OUTER BELT ASSY RH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (RH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (RH), measure the voltage between PR+ and
body ground.
OK:
Voltage: Below 1V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY RH)

OK

0525W–14

H01020

C85243

H10600 H01081

H40953

P/T Squib (RH)

DLC3

DTC B0133/62

Tc

CG

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–505

670

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect PR+ and PR– of the con-
nector (on the seat belt pretensioner side) between the
airbag sensor assy center and the seat belt pretensioner
(RH).

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B0133/62 is not output.

HINT:
Codes other than code B0133/62 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01021

H01081

H40055

P/T Squib (RH)

DLC3

DTC B0133/62

Tc

CG

Airbag
Sensor
Assy
Center

05–506

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

671

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (RH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (RH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0133/62 is not output.

HINT:
Codes other than code B0133/62 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY RH

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01454

Airbag Sensor Assy Center

P12
P/T Squib(LH)

2

A12 PL+

Y–B

1

A12 PL–

Y

1

2

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–507

672

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0135/73 SHORT IN P/T SQUIB (LH) CIRCUIT

CIRCUIT DESCRIPTION

The P/T squib (LH) circuit consists of the airbag sensor assy center and seat belt pretensioner (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0135/73 is recorded when a short is detected in the P/T squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0135/73

Short circuit between PL+ wire harness and PL– wire har-
ness of squib

P/T squib (LH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

055YZ–05

H01016

C81077

H40056

P/T Squib (RH)

PL+

PL–

Airbag
Sensor
Assy
Center

05–508

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

673

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT SEAT
OUTER BELT ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (LH).

HINT:
Make sure that the connector is not damaged (The lock button
is not disengaged, or the claw of the lock is not deformed or
damaged). If the damage is found, replace the wire harness.
(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (LH) (See page

05–424

).

(d)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (LH), measure the resistance between PL+ and
PL–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY LH)

OK

H10600

H01017

H01086

H40057

P/T Squib (LH)

DLC3

Tc

CG

DTC B0135/73

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–509

674

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B0135/73 is not output.

HINT:
Codes other than code B0135/73 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600 H01086

H01018

H40058

Airbag
Sensor
Assy
Center

P/T Squib (LH)

DLC3

Tc

CG

DTC B0135/73

05–510

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

675

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0135/73 is not output.

HINT:
Codes other than code B0135/73 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY LH

OK

USE SIMULATION METHOD TO CHECK

H01016

C81077

H40056

P/T Squib (LH)

PL+

PL–

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–511

676

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0136/74 OPEN IN P/T SQUIB (LH) CIRCUIT

CIRCUIT DESCRIPTION

The P/T squib circuit (LH) consists of the airbag sensor assy center and seat belt pretensioner (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0136/74 is recorded when an open is detected in the P/T squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0136/74

Open circuit in PL+ wire harness or PL– wire harness of
squib

P/T squib (LH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–507

.

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT SEAT
OUTER BELT ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (LH).

(c)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (LH), measure the resistance between PL+ and
PL–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY LH)

OK

055Z0–05

H01017

C85243

H10600 H01087

H40950

P/T Squib (LH)

DLC3

Tc

CG

DTC B0136/74

Airbag
Sensor
Assy
Center

05–512

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

677

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect PL+ and PL– of the connec-
tor (on the seat belt pretensioner side) between the airbag
sensor assy center and the seat belt pretensioner (LH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0136/74 is not output.

HINT:
Codes other than code B0136/74 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01018

H01087

H40060

P/T Squib (LH)

DLC3

CG

DTC B0136/74

Tc

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–513

678

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0136/74 is not output.

HINT:
Codes other than code B0136/74 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY LH

OK

USE SIMULATION METHOD TO CHECK

H01016

C81077

H40056

P/T Squib (LH)

PL+

PL–

Airbag
Sensor
Assy
Center

05–514

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

679

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0137/71 SHORT IN P/T SQUIB (LH) CIRCUIT (TO

GROUND)

CIRCUIT DESCRIPTION

The P/T squib (LH) circuit consists of the airbag sensor assy center and seat belt pretensioner (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0137/71 is recorded when a ground short is detected in the P/T squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0137/71

Short circuit in P/T squib (LH) wire harness (to ground)

P/T squib (LH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–507

.

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT SEAT
OUTER BELT ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (LH).

(c)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (LH), measure the resistance between PL+ and
body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY LH)

OK

0525Z–14

H01017

C85243

H10600 H01084

H40954

P/T Squib (LH)

DLC3

Tc

CG

DTC B0137/71

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–515

680

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect PL+ and PL– of the connec-
tor (on the seat belt pretensioner side) between the airbag
sensor assy center and the seat belt pretensioner (LH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B0137/71 is not output.

HINT:
Codes other than code B0137/71 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01018

H01084

H40062

P/T Squib (LH)

Airbag
Sensor
Assy
Center

DLC3

CG

DTC B0137/71

Tc

05–516

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

681

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0137/71 is not output.

HINT:
Codes other than code B0137/71 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY LH

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01016

C81077

H40056

P/T Squib (LH)

PL+

PL–

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–517

682

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B0138/72 SHORT IN P/T SQUIB (LH) CIRCUIT (TO B+)

CIRCUIT DESCRIPTION

The P/T squib (LH) circuit consists of the airbag sensor assy center and seat belt pretensioner (LH).
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B0138/72 is recorded when a B+ short is detected in the P/T squib (LH) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B0138/72

Short circuit in seat belt pretensioner (LH) wire harness
(to B+)

P/T squib (LH) malfunction

Airbag sensor assy center malfunction

Seat belt pretensioner (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

See page

05–507

.

INSPECTION PROCEDURE

1

CHECK P/T SQUIB(LH) CIRCUIT(AIRBAG SENSOR ASSY CENTER – FRONT SEAT
OUTER BELT ASSY LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the seat belt pretensioner (LH).

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the seat belt pretensioner side) be-
tween the airbag sensor assy center and the seat belt pre-
tensioner (LH), measure the voltage between PL+ and
body ground.
OK:
Voltage: Below 1V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT OUTER BELT ASSY LH)

OK

05260–14

H01017

C85243

H10600 H01085

H40957

P/T Squib (LH)

DLC3

Tc

CG

DTC B0138/72

Airbag
Sensor
Assy
Center

05–518

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

683

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect PL+ and PL– of the connec-
tor (on the seat belt pretensioner side) between the airbag
sensor assy center and the seat belt pretensioner (LH).

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B0138/72 is not output.

HINT:
Codes other than code B0138/72 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01018

H01085

H40064

P/T Squib (LH)

DLC3

DTC B0138/72

CG

Tc

Airbag
Sensor
Assy
Center

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–519

684

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P/T SQUIB (LH)

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the seat belt pretensioner (LH) connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B0138/72 is not output.

HINT:
Codes other than code B0138/72 may be output at this time, but
they are not relevant to this check.

NG

REPLACE FRONT SEAT OUTER BELT ASSY LH

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H40065

IG2

E2

E1

05–520

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

685

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1100/31 AIRBAG SENSOR ASSY MALFUNCTION

CIRCUIT DESCRIPTION

The airbag sensor assy center consists of a airbag sensor assy center, safing sensor, drive circuit, diagnosis
circuit and ignition control, etc.
It receives signals from the airbag sensor, judges whether or not the SRS must be activated, and detects
diagnosis system malfunction.
DTC B1100/31 is recorded when occurrence of a malfunction in the airbag sensor assy center is detected.

DTC No.

DTC Detecting Condition

Trouble Area

B1100/31

Airbag sensor assy center malfunction

Airbag sensor assy center

INSPECTION PROCEDURE

HINT:
When a malfunction code other than code B1100/31 is displayed at the same time, first repair the malfunction
indicated by the malfunction code other than code B1100/31.

INSPECTION PROCEDURE

1

CHECK VOLTAGE AT IG2 OF AIRBAG SENSOR ASSY CENTER

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connector of the airbag sensor assy cen-
ter.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

Measure the voltage between E1 (E2) and IG2 of the air-
bag sensor assy center connector.
OK:
Voltage: 10 – 14 V

NG

CHECK CHECK THAT AN ABNORMALITY
OCCURS ON THE BATTERY AND CHARGING
SYSTEM

OK

05261–09

H10600

H41086

DLC3

DTC B1100/31

CG

Tc

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–521

686

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connectors of all the SRS components.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1100/31 is not output.

HINT:
Codes other than code B1100/31 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

USE SIMULATION METHOD TO CHECK

H40997

DLC3

DTC B1135/24

CG

Tc

Airbag
Sensor
Assy
Center

05–522

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

687

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1135/24 HARF CONNECTION IN AIRBAG SENSOR

ASSY CONNECTOR

CIRCUIT DESCRIPTION

The airbag sensor assy center detects partial connection of connector.
DTC B1135/24 is recorded when the airbag sensor assy center detects an open in the electrical connection
check mechanism of the airbag sensor connector or in the airbag sensor circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1135/24

Malfunction of electrical connection check mechanism of
airbag sensor assy center connector

Airbag sensor assy center malfunction

Electrical connection check mechanism

Airbag sensor assy center

INSPECTION PROCEDURE

1

CHECK AIRBAG SENSOR ASSY CENTER CONNECTOR

(a)

Disconnect negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(b)

Check the connection of the airbag sensor assy center connectors.

NG

CONNECT CONNECTORS

OK

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(c)

Clear the DTC stored in memory (See page

05–424

).

(d)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Check the DTC (See page

05–424

).

OK:
DTC B1135/24 is not output.

HINT:
Codes other than code B1135/24 may be output at this time, but
they are not relevant to this check.

OK

USE SIMULATION METHOD TO CHECK

NG

055Z3–05

H40441

Disconnection Detection Pin

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–523

688

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK PERFORM A VISUAL CHECK OF THE DISCONNECTION DETECTION PIN

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

With 3 connectors connected to the airbag sensor assy
center, place tester leads onto any 2 of 3 disconnection
detection pins and check for continuity.
OK:
Continuity

NG

REPAIR OR REPLACE AIRBAG SENSOR ASSY
CENTER CONNECTOR

OK

REPLACE AIR BAG SENSOR ASSY CENTER

H01450

S11
Side Airbag Sensor Assy (RH)

Airbag Sensor Assy Center

GR

LG

L–Y

P

ESR

SSR–

FSR

VUPR

4

3

2

1

A14

7

10

9

12

ESR

SSR–

FSR

VUPR

A14

A14

A14

05–524

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

689

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1140/32 SIDE AIRBAG SENSOR ASSY (RH)

MALFUNCTION

CIRCUIT DESCRIPTION

The side airbag sensor assy (RH) circuit consists of the diagnosis circuit and lateral deceleration sensor, etc.
It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated,
and detects diagnosis system malfunction.
DTC B1140/32 is recorded when occurrence of a malfunction in the side airbag sensor assy (RH) is detected.

DTC No.

DTC Detecting Condition

Trouble Area

B1140/32

Short circuit in wire harness of side airbag sensor RH
(to ground)

Short circuit in wire harness of side airbag sensor RH
(to B+)

Open circuit in wire harness of side airbag sensor RH

Side airbag sensor assy RH malfunction

Airbag sensor assy center malfunction

Side airbag sensor assy (RH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

055Z6–04

H10600

H01012

H01065

H40442

Side
Airbag
Sensor
Assy RH

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B1140/32

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–525

690

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK SIDE AIR BAG SENSOR ASSY RH

SST

09843–18040

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(c)

Clear the DTC stored in memory (See page

05–424

).

(d)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Check the DTC (See page

05–424

).

OK:
DTC B1140/32 is not output.

HINT:
Codes other than code B1140/32 may be output at this time, but
they are not relevant to this check.

OK

USE SIMULATION METHOD TO CHECK

NG

2

CHECK AIRBAG SENSOR ASSY CENTER CONNECTOR

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(c)

Check that the connectors is properly connected to the airbag sensor assy center.

NG

CONNECT CONNECTORS

OK

3

CHECK SIDE AIRBAG SENSOR ASSY CONNECTOR

(a)

Check that the connector is properly connected to the side airbag sensor assy (RH).

NG

CONNECT CONNECTORS

OK

H01015

C82942

C91384

C91385

H41635

SSR–

VUPR

ESR

Side
Airbag
Sensor
Assy RH

Airbag
Sensor
Assy
Center

FSR

H01015

C82942

H01015

C82942

H40444

VUPR

Side
Airbag
Sensor
Assy RH

Airbag
Sensor
Assy
Center

SSR–

ESR

FSR

05–526

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

691

Author:

Date:

2004 COROLLA (RM1037U)

4

CHECK SIDE AIRBAG SENSOR ASSY(RH) CIRCUIT(OPEN)(AIRBAG SENSOR
ASSY CENTER – SIDE AIRBAG SENSOR ASSY RH)

SST

09843–18040

(a)

Disconnect the connectors between the airbag sensor
assy center and the side airbag sensor assy RH.

(b)

Using a service wire, connect VUPR and ESR, and FSR
and SSR– of the connector (on the side airbag sensor
assy side) between the airbag sensor assy center and the
side airbag sensor assy (RH).

(c)

For the connector (on the airbag sensor assy center side)
between the side airbag sensor assy RH and the airbag
sensor assy center, measure the resistance between
VUPR and ESR, and between FSR and SSR–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY RH)

OK

5

CHECK SIDE AIRBAG SENSOR ASSY(RH) CIRCUIT(TO GROUND)(AIRBAG
SENSOR ASSY CENTER – SIDE AIRBAG SENSOR ASSY RH)

(a)

Disconnect the connection between VUPR and ESR, and
between FSR and SSR–.

(b)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the side air-
bag sensor assy (RH), measure the resistance between
each terminal of VUPR, SSR– and FSR, and body
ground.
OK:
Resistance: 1M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY RH)

OK

H01015

C82942

H01015

C82942

H40444

VUPR

Side
Airbag
Sensor
Assy RH

Airbag
Sensor
Assy
Center

SSR–

ESR

FSR

H01015

C82942

H01015

C82942

H40444

VUPR

Side
Airbag
Sensor
Assy RH

Airbag
Sensor
Assy
Center

SSR–

ESR

FSR

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–527

692

Author:

Date:

2004 COROLLA (RM1037U)

6

CHECK SIDE AIRBAG SENSOR ASSY(RH) CIRCUIT(AIRBAG SENSOR ASSY
CENTER – SIDE AIRBAG SENSOR ASSY RH)

(a)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the side air-
bag sensor assy (RH), measure the resistance between
VUPR and ESR, and between FSR and SSR–.
OK:
Resistance: 1M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY RH)

OK

7

CHECK SIDE AIRBAG SENSOR ASSY(RH) CIRCUIT(TO B+)(AIRBAG SENSOR
ASSY CENTER – AIDE AIRBAG SENSOR ASSY RH)

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON.

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the side air-
bag sensor assy (RH), measure the voltage between
each terminal of VUPR, SSR– and FSR, and body
ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY RH)

OK

H10600 H01065

H01012

H01066

H41930

DLC3

CG

Tc

DTC B1140/32

Side
Airbag
Sensor
Assy LH

Airbag
Sensor
Assy
Center

DTC B1141/33

05–528

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

693

Author:

Date:

2004 COROLLA (RM1037U)

8

CHECK SIDE AIR BAG SENSOR ASSY RH

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the airbag sensor assy center connector.

(d)

Interchange the side airbag sensor assy (RH) and LH and
connect the connectors to them.

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
(A): DTC B1140/32 is not output.
(B): DTC B1141/33 is not output.

NG(A)

REPLACE AIR BAG SENSOR ASSY CENTER

NG(B)

REPLACE SIDE AIR BAG SENSOR ASSY RH

OK

9

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01450

S10
Side Airbag Sensor Assy (LH)

Airbag Sensor Assy Center

LG–B

L–W

P–L

ESL

SSL–

FSL

VUPL

4

3

2

1

A12

12

9

10

7

GR–L

ESL

SSL–

FSL

VUPL

A12

A12

A12

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–529

694

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1141/33 SIDE AIRBAG SENSOR ASSY (LH)

MALFUNCTION

CIRCUIT DESCRIPTION

The side airbag sensor assy (LH) circuit consists of the diagnosis circuit and lateral deceleration sensor, etc.
It receives signals from the lateral deceleration sensor, judges whether or not the SRS must be activated,
and detects diagnosis system malfunction.
DTC B1141/33 is recorded when occurrence of a malfunction in the side airbag sensor assy (LH) is detected.

DTC No.

DTC Detecting Condition

Trouble Area

B1141/33

Short circuit in wire harness of side airbag sensor LH
(to ground)

Short circuit in wire harness of side airbag sensor LH
(to B+)

Open circuit in wire harness of side airbag sensor LH

Side airbag sensor assy LH malfunction

Airbag sensor assy center malfunction

Side airbag sensor assy (LH)

Airbag sensor assy center

Instrument panel wire No.3

WIRING DIAGRAM

055Z7–05

H01007

H10600 H01066

H40445

Side
Airbag
Sensor
Assy LH

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B1141/33

05–530

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

695

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK SIDE AIR BAG SENSOR ASSY LH

SST

09843–18040

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(c)

Clear the DTC stored in memory (See page

05–424

).

(d)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Check the DTC (See page

05–424

).

OK:
DTC B1141/33 is not output.

OK

USE SIMULATION METHOD TO CHECK

NG

2

CHECK AIRBAG SENSOR ASSY CENTER CONNECTOR

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(c)

Check that the connectors is properly connected to the airbag sensor assy center.

NG

CONNECT CONNECTORS

OK

3

CHECK SIDE AIRBAG SENSOR ASSY CONNECTOR

(a)

Check that the connector is properly connected to the side airbag sensor assy (LH).

NG

CONNECT CONNECTORS

OK

H01010

C81676

C91384

C91385

H41636

ESL

FSL

VUPL

Side
Airbag
Sensor
Assy LH

Airbag
Sensor
Assy
Center

SSL–

H01010

C81676

H01010

C81676

H40447

VUPL

Side
Airbag
Sensor
Assy LH

Airbag
Sensor
Assy
Center

ESL

FSL

SSL–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–531

696

Author:

Date:

2004 COROLLA (RM1037U)

4

CHECK SIDE AIRBAG SENSOR ASSY(LH) CIRCUIT(OPEN)(AIRBAG SENSOR
ASSY CENTER – SIDE AIRBAG SENSOR ASSY LH)

SST

09843–18040

(a)

Disconnect the connectors between the airbag sensor
assy center and the side airbag sensor assy LH.

(b)

Using a service wire, connect VUPL and ESL, and FSL
and SSL– of the connector (on the side airbag sensor
assy side) between the airbag sensor assy center and the
side airbag sensor assy (LH).

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the side air-
bag sensor assy (LH), measure the resistance between
VUPL and ESL, and between FSL and SSL–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY LH)

OK

5

CHECK SIDE AIRBAG SENSOR ASSY(LH) CIRCUIT(TO GROUND)(AIRBAG
SENSOR ASSY CENTER – SIDE AIRBAG SENSOR ASSY LH)

(a)

Disconnect the connection between VUPL and ESL, and
between FSL and SSL–.

(b)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the side air-
bag sensor assy (LH), measure the resistance between
each terminal of VUPL, SSL– and FSL, and body ground.
OK:
Resistance: 1M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY LH)

OK

H01010

C81676

H01010

C81676

H40447

VUPL

Side
Airbag
Sensor
Assy LH

Airbag
Sensor
Assy
Center

ESL

FSL

SSL–

H01010

C81676

H01010

C81676

H40447

VUPL

Side
Airbag
Sensor
Assy LH

Airbag
Sensor
Assy
Center

ESL

FSL

SSL–

05–532

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

697

Author:

Date:

2004 COROLLA (RM1037U)

6

CHECK SIDE AIRBAG SENSOR ASSY(LH) CIRCUIT(AIRBAG SENSOR ASSY
CENTER – SIDE AIRBAG SENSOR ASSY LH)

(a)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the side air-
bag sensor assy (LH), measure the resistance between
VUPL and ESL, and between FSL and SSL–.
OK:
Resistance: 1M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY LH)

OK

7

CHECK SIDE AIRBAG SENSOR ASSY(LH) CIRCUIT(TO B+)(AIRBAG SENSOR
ASSY CENTER – SIDE AIRBAG SENSOR ASSY LH)

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON.

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the side air-
bag sensor assy (LH), measure the voltage between
each terminal of VUPL, SSL– and FSL, and body ground.
OK:
Voltage: Below 1V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
SIDE AIRBAG SENSOR ASSY LH)

OK

H01007

H10600 H01065

H01066

H41931

DLC3

CG

Tc

DTC B1141/33

Airbag
Sensor
Assy
Center

Side

Airbag

Sensor

Assy RH

DTC B1140/32

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–533

698

Author:

Date:

2004 COROLLA (RM1037U)

8

CHECK SIDE AIR BAG SENSOR ASSY LH

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the airbag sensor assy center connector.

(d)

Interchange the side airbag sensor assy (LH) and RH and
connect the connectors to them.

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
(A): DTC B1140/32 is not output.
(B): DTC B1141/33 is not output.

NG(A)

REPLACE SIDE AIR BAG SENSOR ASSY LH

NG(B)

REPLACE AIR BAG SENSOR ASSY CENTER

OK

9

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H42003

Airbag Sensor Assy Center

A12

LSP+

LSP–

A12

B6
Seat Position Airbag Sensor

3

4

G–W

R–B

4

5

05–534

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

699

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1153/25 SEAT POSITION AIRBAG SENSOR

MALFUNCTION

CIRCUIT DESCRIPTION

The seat position sensor circuit consists of the airbag sensor assy center and seat position sensor.
DTC B1153/25 is recorded when a malfunction is detected in the seat position sensor circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1153/25

Short circuit between LSP+ wire harness and LSP– wire
harness (to B+)

Short circuit between LSP+ wire harness and LSP– wire
harness (to ground)

Open circuit in LSP+ wire harness or LSP– wire harness

Seat position airbag sensor malfunction

Airbag sensor assy center malfunction

Seat position airbag sensor

Airbag sensor assy center

Wire harness (Seat position airbag sensor – Front seat inner
belt assy)

Instrument panel wire No.3

WIRING DIAGRAM

055ZA–04

H02757

H10600 C91522

H41990

Seat
Position
Airbag
Sensor

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B1153/25

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–535

700

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK SEAT POSITION AIR BAG SENSOR

SST

09843–18040

(a)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(b)

Clear the DTC stored in memory (See page

05–424

).

(c)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Check the DTC (See page

05–424

).

OK:
DTC B1153/25 is not output.

HINT:
Codes other than code B1153/25 may be output at this time, but
they are not relevant to this check.

OK

USE SIMULATION METHOD TO CHECK

NG

2

CHECK AIRBAG SENSOR ASSY CENTER CONNECTOR

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(c)

Check that the connector is properly connected to the airbag sensor assy center.

NG

CONNECT CONNECTORS

OK

3

CHECK SEAT POSITION AIRBAG SENSOR CONNECTOR

(a)

Check that the connector is properly connected to the seat position airbag sensor.

NG

CONNECT CONNECTORS

OK

H03353

C91524 C91525

H41988

Airbag
Sensor
Assy
Center

LSP+

LSP–

Seat

Position

Airbag

Sensor

H03355

C91525

H41989

Airbag
Sensor
Assy
Center

LSP+

LSP–

Seat

Position

Airbag

Sensor

05–536

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

701

Author:

Date:

2004 COROLLA (RM1037U)

4

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (OPEN)(AIRBAG SENSOR
ASSY CENTER – SEAT POSITION AIRBAG SENSOR)

SST

09843–18040

(a)

Disconnect the connectors between the airbag sensor
assy center and the seat position airbag sensor.

(b)

Using a service wire, connect LSP+ and LSP– of the con-
nector (on the seat position airbag sensor side) between
the airbag sensor assy center and the seat position airbag
sensor.

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the seat posi-
tion airbag sensor, measure the resistance between
LSP+ and LSP–.
OK:
Resistance: Below 1

Ω

NG

Go to step 10

OK

5

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (TO GROUND)(AIRBAG
SENSOR ASSY CENTER – SEAT POSITION AIRBAG SENSOR)

(a)

Release the service wire of the connector (on the seat
position airbag sensor side) between the seat position air-
bag sensor and the airbag sensor assy center.

(b)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the seat posi-
tion airbag sensor, measure the resistance between body
ground and each of LSP+ and LSP–.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 11

OK

H03355

C91525

H41989

Airbag
Sensor
Assy
Center

LSP+

LSP–

Seat

Position

Airbag

Sensor

H03355

C91525

H41989

Airbag
Sensor
Assy
Center

LSP+

LSP–

Seat

Position

Airbag

Sensor

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–537

702

Author:

Date:

2004 COROLLA (RM1037U)

6

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT(AIRBAG SENSOR ASSY
CENTER – SEAT POSITION AIRBAG SENSOR)

(a)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the seat posi-
tion airbag sensor, measure the resistance between
LSP+ and LSP–.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 12

OK

7

CHECK SEAT POSITION AIRBAG SENSOR CIRCUIT (TO B+)(AIRBAG SENSOR
ASSY CENTER – SEAT POSITION AIRBAG SENSOR)

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON.

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the seat posi-
tion airbag sensor, measure the voltage between the
body ground and each of LSP+ and LSP–.
OK:
Voltage: Below 1 V

NG

Go to step 13

OK

H02757

H10600 C91522

H41990

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B1153/25

Seat

Position

Airbag

Sensor

05–538

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

703

Author:

Date:

2004 COROLLA (RM1037U)

8

CHECK SEAT POSITION AIR BAG SENSOR

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connectors of the seat position airbag sensor
and the airbag sensor assy center.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC D1153/25 is not output.

HINT:
Codes other that code B1153/25 may be output at this time, but
they are not relevant to this check.

NG

REPLACE SEAT POSITION AIR BAG SENSOR

OK

USE SIMULATION METHOD TO CHECK

H02757

H10600 C91522

H41990

Airbag
Sensor
Assy
Center

DLC3

CG

Tc

DTC B1153/25

Seat

Position

Airbag

Sensor

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–539

704

Author:

Date:

2004 COROLLA (RM1037U)

9

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector of a new seat position airbag sen-
sor.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC D1153/25 is not output.

HINT:
Codes other that code B1153/25 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

USE SIMULATION METHOD TO CHECK

H03352

C91524 C91530

H42101

Airbag
Sensor
Assy
Center

LSP+

LSP–

Seat

Position

Airbag

Sensor

Front Seat Wire

C91530

H03354

H42102

Airbag
Sensor
Assy
Center

LSP+

LSP–

Seat

Position

Airbag

Sensor

Front Seat Wire

05–540

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

705

Author:

Date:

2004 COROLLA (RM1037U)

10

CHECK WIRE HARNESS(SEAT POSITION AIRBAG SENSOR – FRONT SEAT
INNER BELT ASSY)

SST

09843–18040

(a)

Disconnect the front seat wire connector on the airbag
sensor assy center side.

(b)

For the front seat wire connector (on the airbag sensor
assy center side) between the airbag sensor assy center
and the seat position airbag sensor, measure the resis-
tance between LSP+ and LSP–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE WIRE HARNESS(SEAT
POSITION SENSOR – FRONT SEAT INNER
BELT ASSY)

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT INNER BELT ASSY)

11

CHECK WIRE HARNESS(SEAT POSITION AIRBAG SENSOR – FRONT SEAT
INNER BELT ASSY)

(a)

Disconnect the front seat wire connector on the airbag
sensor assy center side.

(b)

For the front seat wire connector (on the airbag sensor
assy center side) between the airbag sensor assy center
and the seat position sensor, measure the resistance be-
tween body ground and each of LSP+ and LSP–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE WIRE HARNESS(SEAT
POSITION SENSOR – FRONT SEAT INNER
BELT ASSY)

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT INNER BELT ASSY)

C91530

H03354

H42102

Airbag
Sensor
Assy
Center

LSP+

LSP–

Seat

Position

Airbag

Sensor

Front Seat Wire

C91530

H03354

H42102

Seat
Position
Sensor

Airbag
Sensor
Assy
Center

LSP+

LSP–

Front Seat Wire

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–541

706

Author:

Date:

2004 COROLLA (RM1037U)

12

CHECK WIRE HARNESS(SEAT POSITION AIRBAG SENSOR – FRONT SEAT
INNER BELT ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the front seat wire connector on the airbag
sensor assy center side.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 60 se-
conds.

(e)

For the front seat wire connector (on the airbag sensor
assy center side) between the front seat inner belt assy
and the seat position airbag sensor, measure the voltage
between body ground and each of LSP+ and LSP–.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE WIRE HARNESS(SEAT
POSITION AIRBAG SENSOR – FRONT SEAT IN-
NER BELT ASSY)

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT INNER BELT ASSY)

13

CHECK WIRE HARNESS(SEAT POSITION AIRBAG SENSOR – FRONT SEAT
INNER BELT ASSY)

(a)

Turn the ignition switch to LOCK.

(b)

For the front seat wire connector (on the airbag sensor
assy center side) between the airbag sensor assy center
and the seat position sensor, measure the resistance be-
tween LSP+ and LSP–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE WIRE HARNESS(SEAT
POSITION AIRBAG SENSOR – FRONT SEAT IN-
NER BELT ASSY)

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE NO.3(AIRBAG SENSOR ASSY CENTER –
FRONT SEAT INNER BELT ASSY)

H02750

9

A13 +SR

IA1

B–W

–SR

A13

20

1

2

B–W

BR–W

BR–W

2

1

+SR

–SR

Airbag Sensor Assy Center

A6
Airbag Front RH Sensor

IA1

05–542

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

707

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1156/15 FRONT AIRBAG SENSOR (RH)

MALFUNCTION

DTC

B1157/15 FRONT AIRBAG SENSOR (RH)

MALFUNCTION

CIRCUIT DESCRIPTION

The airbag front RH sensor circuit consists of the airbag sensor assy center and airbag front RH sensor.
DTC B1156/B1157/15 is recorded when a malfunction is detected in the airbag front RH sensor circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1156/B1157/15

Airbag front RH sensor malfunction

Airbag front RH sensor

Airbag sensor assy center

Instrument panel wire

Engine room main wire

WIRING DIAGRAM

057US–02

H03355

C81408

H03355

C81408

H40069

Airbag
Sensor
Assy
Center

+SR

–SR

Airbag

Front RH

Sensor

H03355

C81408

H03355

C81408

H40069

+SR

–SR

Airbag
Sensor
Assy
Center

Airbag

Front RH

Sensor

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–543

708

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK FRONT AIRBAG SENSOR (RH) CIRCUIT (TO B+)(AIRBAG SENSOR ASSY
CENTER – AIRBAG FRONT RH SENSOR)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag front RH
sensor and the airbag sensor assy center.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the airbag sensor assy center side)
between the airbag front RH sensor and the airbag sen-
sor assy center, measure the voltage between body
ground and each of +SR and –SR.
OK:
Voltage: Below 1 V

NG

Go to step 6

OK

2

CHECK FRONT AIRBAG SENSOR (RH) CIRCUIT (TO GROUND)(AIRBAG SENSOR
ASSY – AIRBAG FRONT RH SENSOR)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

For the connector (on the airbag sensor assy center side)
between the airbag front RH sensor and the airbag sen-
sor assy center, measure the resistance between body
ground and each of +SR and –SR.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 7

OK

H03353

C81408

H08016

H41800

+SR

–SR

Airbag
Sensor
Assy
Center

Airbag

Front RH

Sensor

C54743

C54743

H40071

+SR

–SR

05–544

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

709

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK FRONT AIRBAG SENSOR (RH) CIRCUIT(OPEN)(AIRBAG SENSOR ASSY
CENTER – AIRBAG FRONT RH SENSOR)

SST

09843–18040

(a)

Using a service wire, connect +SR and –SR of the con-
nector (on the airbag front RH sensor side) between the
airbag front RH sensor and the airbag sensor assy center.

(b)

For the connector (on the airbag sensor assy center side)
between the airbag front RH sensor and the airbag sen-
sor assy center, measure the resistance between +SR
and –SR.
OK:
Resistance: Below 1

Ω

NG

Go to step 8

OK

4

INSPECT AIR BAG FRONT RH SENSOR

(a)

For the connector of the airbag front RH sensor, measure
the resistance between +SR and –SR.
OK:
Resistance: 820

Ω

NG

REPLACE AIR BAG FRONT RH SENSOR

OK

H02757

H10600 H01063

H02757

H10600 H01063

H40072

DTC B1156/B1157/15

DLC3

Tc

CG

Airbag
Sensor
Assy
Center

Airbag

Front RH

Sensor

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–545

710

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Connect the airbag front RH sensor connector and airbag
sensor assy center connector.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B1156/B1157/15 is not output.

HINT:
Codes other than code B1156/B1157/15 may be output at this
time, but they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

USE SIMULATION METHOD TO CHECK

H41804

+SR

–SR

Airbag
Sensor
Assy
Center

Airbag

Front RH

Sensor

Engine Room
Main Wire

H41804

+SR

–SR

Airbag
Sensor
Assy
Center

Airbag

Front RH

Sensor

Engine Room
Main Wire

05–546

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

711

Author:

Date:

2004 COROLLA (RM1037U)

6

CHECK ENGINE ROOM MAIN WIRE HARNESS (TO B+)(CONNECTOR – AIRBAG
FRONT RH SENSOR)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Disconnect the connector between the engine room main
wire and the instrument panel wire.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON.

(f)

For the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag front RH sensor, measure the volt-
age between body ground and each of +SR and –SR.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

7

CHECK ENGINE ROOM MAIN WIRE HARNESS (TO GROUND)(CONNECTOR –
AIRBAG FRONT RH SENSOR)

(a)

Disconnect the connectors between the engine room
main wire and the instrument panel wire.

(b)

For the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag front RH sensor, measure the resis-
tance between body ground and each of +SR and –SR.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

H41945

Airbag

Front

RH Sensor

Airbag
Sensor
Assy
Center

+SR

–SR

Engine Room
Main Wire

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–547

712

Author:

Date:

2004 COROLLA (RM1037U)

8

CHECK ENGINE ROOM MAIN WIRE HARNESS(OPEN)(CONNECTOR – AIRBAG
FRONT RH SENSOR)

SST

09843–18040

(a)

Disconnect the connectors between the engine room
main wire and the instrument panel wire.

(b)

Using a service wire, connect +SR and –SR of the engine
room main wire connector (on the airbag front RH sensor
side) between the airbag sensor assy center and the air-
bag front RH sensor.

(c)

For the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag front RH sensor, measure the resis-
tance between the +SR and –SR.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

H02750

Airbag Sensor Assy Center

+SL

–SL

A13

15

26

W–R

BR

IA1

3

4

A5
Airbag Sensor Front LH

2

1

A13

+SL

–SL

W–R

BR

IA1

05–548

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

713

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1158/16 FRONT AIRBAG SENSOR (LH)

MALFUNCTION

DTC

B1159/16 FRONT AIRBAG SENSOR (LH)

MALFUNCTION

CIRCUIT DESCRIPTION

The airbag sensor front LH circuit consists of the airbag sensor assy center and airbag sensor front LH.
DTC B1158/B1159/16 is recorded when malfunction is detected in the airbag sensor front LH circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1158/B1159/16

Airbag sensor front LH malfunction

Airbag sensor front LH

Airbag sensor assy center

Instrument panel wire

Engine room main wire

WIRING DIAGRAM

057UT–02

H03355

C81408

H03355

C81408

H40069

Airbag
Sensor
Assy
Center

+SL

–SL

Airbag

Sensor

Front LH

H03355

C81408

H03355

C81408

H40069

Airbag
Sensor
Assy
Center

+SL

–SL

Airbag

Sensor

Front LH

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–549

714

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK FRONT AIRBAG SENSOR (LH) CIRCUIT (TO B+)(AIRBAG SENSOR ASSY
CENTER – AIRBAG SENSOR FRONT LH)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the airbag sensor front LH.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the airbag sensor assy center side)
between the airbag sensor front LH and the airbag sensor
assy center, measure the voltage between body ground
and each of +SL and –SL.
OK:
Voltage: Below 1 V

NG

Go to step 6

OK

2

CHECK FRONT AIRBAG SENSOR(LH) CIRCUIT(TO GROUND)(AIRBAG SENSOR
ASSY CENTER – AIRBAG SENSOR FRONT LH)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

For the connector (on the airbag sensor assy center side)
between the airbag sensor front LH and the airbag sensor
assy center, measure the resistance between body
ground and each of +SL and –SL.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 7

OK

H03353

H03360 H08016

H41802

+SL

–SL

Airbag
Sensor
Assy
Center

Airbag

Sensor

Front LH

C54743

C54743

H40071

–SL

+SL

05–550

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

715

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK FRONT AIRBAG SENSOR (LH) CIRCUIT(OPEN)(AIRBAG SENSOR ASSY
CENTER – AIRBAG SENSOR FRONT LH)

(a)

Using a service wire, connect +SL and –SL of the connec-
tor (on the airbag sensor front LH side) between the air-
bag sensor assy center and the airbag sensor front LH.

(b)

For the connector (on the airbag sensor assy center side)
between the airbag sensor front LH and the airbag sensor
assy center, measure the resistance between +SL and
–SL.
OK:
Resistance: Below 1

Ω

NG

Go to step 8

OK

4

INSPECT AIR BAG SENSOR FRONT LH

(a)

For the connector of the airbag sensor front LH, measure
the resistance between +SL and –SL.
OK:
Resistance: 820

Ω

NG

REPLACE AIR BAG SENSOR FRONT LH

OK

H02757

H10600 H01064

H02757

H10600 H01064

H40075

DLC3

CG

Tc

DTC B1158/B1159/16

Airbag
Sensor
Assy
Center

Airbag

Sensor

Front LH

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–551

716

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Connect the airbag sensor front LH connector and airbag
sensor assy center connector.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B1158/B1159/16 is not output.

HINT:
Codes other than code B1158/B1159/16 may be output at this
time, but they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

USE SIMULATION METHOD TO CHECK

H03354

H40556

H40558

+SL

–SL

Airbag
Sensor
Assy
Center

Airbag

Sensor

Front LH

Engine Room
Main Wire

H03354

H40556

H40558

+SL

–SL

Airbag
Sensor
Assy
Center

Airbag

Sensor

Front LH

Engine Room
Main Wire

05–552

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

717

Author:

Date:

2004 COROLLA (RM1037U)

6

CHECK ENGINE ROOM MAIN WIRE HARNESS (TO B+)(CONECTOR – AIRBAG
SENSOR FRONT LH)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Disconnect the connector between the engine room main
wire and the instrument panel wire.

(d)

Connect the negative (–) terminal to the battery, and wait
at least for 2 seconds.

(e)

Turn the ignition switch to ON.

(f)

For the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag sensor front LH, measure the volt-
age between body ground and each of +SL and –SL.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

7

CHECK ENGINE ROOM MAIN WIRE HARNESS (TO GROUND)(CONNECTOR –
AIRBAG SENSOR FRONT LH)

(a)

Disconnect the connectors between the engine room
main wire and the instrument panel wire.

(b)

For the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag sensor front LH, measure the resis-
tance between body ground and each of +SL and –SL.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

H03352

H40556

H08016

H41801

Airbag

Sensor

Front LH

Airbag
Sensor
Assy
Center

+SL

–SL

Engine Room
Main Wire

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–553

718

Author:

Date:

2004 COROLLA (RM1037U)

8

CHECK ENGINE ROOM MAIN WIRE HARNESS(OPEN)(CONNECTOR – AIRBAG
SENSOR FRONT LH)

(a)

Disconnect the connectors between the engine room
main wire and the instrument panel wire.

(b)

Using a service wire, connect +SL and –SL of the engine
room main wire connector (on the airbag sensor front LH
side) between the airbag sensor assy center and the air-
bag sensor front LH.

(c)

For the engine room main wire connector (on the airbag
sensor assy center side) between the airbag sensor assy
center and the airbag sensor front LH, measure the resis-
tance between +SL and –SL.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE ENGINE ROOM MAIN
WIRE

OK

REPAIR OR REPLACE INSTRUMENT PANEL WIRE

H01451

Airbag Sensor Assy Center

A16
D Squib (2nd step)

Spiral Cable
Sub–Assy

Y–O

Y–V

D2+

D2–

4

A13

3

A13

17

16

D+

D–

05–554

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

719

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1180/17 SHORT IN D SQUIB (2ND STEP) CIRCUIT

CIRCUIT DESCRIPTION

The D squib circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn button assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1180/17 is recorded when a short is detected in the D squib circuit (2nd step).

DTC No.

DTC Detecting Condition

Trouble Area

B1180/17

Short circuit between D2+ wire harness and D2– wire
harness of squib (2nd step)

D squib (2nd step) malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib, 2nd step)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

055ZL–04

H01001

C89244

H41475

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

H01002

H10600 C89246

H42137

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

DLC3

CG

Tc

DTC B1180/17

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–555

720

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the horn button assy.

(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy (See page

05–424

).

(d)

For the black connector (on the spiral cable sub–assy
side ) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D2+ and
D2–.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 4

OK

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B1180/17 is not output.

HINT:
Codes other than code B1180/17 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003

H10600 C89246

H42138

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

DLC3

CG

Tc

DTC B1180/17

H01004

H41424

H41478

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

05–556

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

721

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1180/17 is not output.

HINT:
Codes other than code B1180/17 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

USE SIMULATION METHOD TO CHECK

4

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Disconnect the connector of the instrument panel wire.

(b)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy (See page

05–424

).

(c)

For the connector (on the spiral cable sub–assy side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy, measure the resistance between D2+ and
D2–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

H01000

C89244

H41479

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–557

722

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK SPIRAL CABLE SUB–ASSY

(a)

Release the airbag activation prevention mechanism of
the spiral cable sub–assy connector on the airbag sensor
assy center side (See page

05–424

).

(b)

For the black connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D2+ and
D2–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

USE SIMULATION METHOD TO CHECK

H01001

C89244

H41475

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

05–558

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

723

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1181/18 OPEN IN D SQUIB (2ND STEP) CIRCUIT

CIRCUIT DESCRIPTION

The D squib circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn button assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1181/18 is recorded when an open is detected in the D squib circuit (2nd step).

DTC No.

DTC Detecting Condition

Trouble Area

B1181/18

Open circuit in D+ wire harness or D– wire harness of squib

D squib (2nd step) malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib, 2nd step)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–554

.

INSPECTION PROCEDURE

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the horn button assy
and the airbag sensor assy center.

(c)

For the black connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D2+ and
D2–.
OK:
Resistance: Below 1

Ω

NG

Go to step 4

OK

055ZM–04

H01002
H10600

C89252

C89253

H42139

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

DLC3

CG

Tc

DTC B1181/18

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–559

724

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect D2+ and D2– of the black
connector (on the spiral cable sub–assy side) between
the horn button assy and the spiral cable sub–assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B1181/18 is not output.

HINT:
Codes other than code B1181/18 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003

H10600 C89253

H42140

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

DLC3

CG

Tc

DTC B1181/18

H01004

H41424

H41478

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

05–560

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

725

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1181/18 is not output.

HINT:
Codes other than code B1181/18 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

USE SIMULATION METHOD TO CHECK

4

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Disconnect the connector of the instrument panel wire.

(b)

For the connector (on the spiral cable sub–assy side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy, measure the resistance between D2+ and
D2–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

H01000

C89244

H41479

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–561

726

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK SPIRAL CABLE SUB–ASSY

(a)

For the black connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D2+ and
D2–.
OK:
Resistance: Below 1

Ω

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

USE SIMULATION METHOD TO CHECK

H01001

C89244

H41475

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

05–562

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

727

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1182/19 SHORT IN D SQUIB (2ND STEP) CIRCUIT

(TO GROUND)

CIRCUIT DESCRIPTION

The D squib (2nd step) circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn but-
ton assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1182/19 is recorded when a ground short is detected in the D squib (2nd step) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1182/19

Short circuit in D squib (2nd step) wire harness (to
ground)

D squib (2nd step) malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib, 2nd step)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–554

.

INSPECTION PROCEDURE

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connector between the airbag sensor
assy center and the horn button assy.

(c)

For the black connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D2+ and
body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

Go to step 5

OK

055ZN–05

H01002

C89252

H10600 C91338

H42141

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

DLC3

CG

Tc

DTC B1182/19

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–563

728

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect D2+ and D2– of the black
connector (on the spiral cable sub–assy side) between
the horn button assy and the spiral cable sub–assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait t least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B1182/19 is not output.

HINT:
Codes other than code B1182/19 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003
H10600 C89253

H42142

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

DLC3

CG

Tc

DTC B1182/19

05–564

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

729

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1182/19 is not output.

HINT:
Codes other than code B1182/19 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01004

H41424

H41478

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

H01000

C89244

H41479

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–565

730

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Disconnect the connector of the instrument panel wire.

(b)

For the connector (on the spiral cable sub–assy side) be-
tween the airbag sensor assy center and the spiral cable
sub–assy, measure the resistance between D2+ and
body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

6

CHECK SPIRAL CABLE SUB–ASSY

(a)

For the black connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the resistance between D2+ and
body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

7

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01001

C89244

H41475

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

05–566

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

731

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1183/22 SHORT IN D SQUIB (2ND STEP) CIRCUIT

(TO B+)

CIRCUIT DESCRIPTION

The D squib (2nd step) circuit consists of the airbag sensor assy center, spiral cable sub–assy and horn but-
ton assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1183/22 is recorded when a B+ short is detected in the D squib (2nd step) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1183/22

Short circuit in D squib (2nd step) wire harness (to B+)

D squib (2nd step) malfunction

Spiral cable sub–assy malfunction

Airbag sensor assy center malfunction

Horn button assy (D squib, 2nd step)

Spiral cable sub–assy

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–424

.

CIRCUIT INSPECTION

1

CHECK D SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – HORN BUTTON
ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the horn button assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the black connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the voltage between D2+ and body
ground.
OK:
Voltage: Below 1 V

NG

Go to step 5

OK

055ZO–04

H01002

C89252

H10600 C91342

H42143

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

DLC3

CG

Tc

DTC B1183/22

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–567

732

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect D2+ and D2– of the black
connector (on the spiral cable sub–assy side) between
the horn button assy and the spiral cable sub–assy.

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B1183/22 is not output.

HINT:
Codes other than code B1183/22 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H01003

H10600 C91342

H42144

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

DLC3

CG

Tc

DTC B1183/22

05–568

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

733

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK D SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1183/22 is not output.

HINT:
Codes other than code B1183/22 may be output at this time, but
they are not relevant to this check.

NG

REPLACE HORN BUTTON ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01004

H41424

H41478

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

H01000

C89244

H41479

D Squib

Airbag
Sensor
Assy
Center

Spiral

Cable

Sub–Assy

Color: Black

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–569

734

Author:

Date:

2004 COROLLA (RM1037U)

5

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY CENTER – SPIRAL
CABLE SUB–ASSY)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the connector of the instrument panel wire.

(c)

Turn the ignition switch to ON.

(d)

For the connector (on the spiral cable sub–assy side) be-
tween the horn button assy and the spiral cable sub–assy,
measure the voltage between D2+ and body ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE(AIRBAG SENSOR ASSY CENTER – SPI-
RAL CABLE SUB–ASSY)

OK

6

CHECK SPIRAL CABLE SUB–ASSY

(a)

For the black connector (on the spiral cable sub–assy
side) between the horn button assy and the spiral cable
sub–assy, measure the voltage between D2+ and body
ground.
OK:
Voltage: Below 1 V

NG

REPLACE SPIRAL CABLE SUB–ASSY

OK

7

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H01454

A15
P Squib (2nd step)

Airbag Sensor Assy Center

Y–GR

Y–P

3

4

8

P2+

A13

P2–

7

A13

P+

P–

05–570

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

735

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1185/57 SHORT IN P SQUIB (2ND STEP) CIRCUIT

CIRCUIT DESCRIPTION

The P squib (2nd step) circuit consists of the airbag sensor assy center and instrument panel passenger
airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1185/57 is recorded when a short is detected in the P squib (2nd step) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1185/57

Short circuit between P2+ wire harness and P2– wire
harness of squib.

P squib (2nd step) malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib, 2nd step)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

055ZP–04

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P2+

P2–

H01023
H10600 H16840

H41979

P Squib

Airbag
Sensor
Assy
Center

DTC B1185/57

DLC3

CG

Tc

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–571

736

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

(c)

Release the airbag activation prevention mechanism of
the connector (on the airbag sensor assy center side) be-
tween the airbag sensor assy center and the instrument
panel passenger airbag assy (See page

05–424

).

(d)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the resistance between P2+ and P2–.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(d)

Clear the DTC stored in memory (See page

05–424

).

(e)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Check the DTC (See page

05–424

).

OK:
DTC B1185/57 is not output.

HINT:
Codes other than code B1185/57 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01024

H16840

H41980

P Squib

Airbag
Sensor
Assy
Center

DTC B1185/57

DLC3

CG

Tc

05–572

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

737

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1185/57 is not output.

HINT:
Codes other than code B1185/57 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

USE SIMULATION METHOD TO CHECK

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P2+

P2–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–573

738

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1186/58 OPEN IN P SQUIB (2ND STEP) CIRCUIT

CIRCUIT DESCRIPTION

The P squib (2nd step) circuit consists of the airbag sensor assy center and instrument panel passenger
airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1186/58 is recorded when an open is detected in the P squib circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1186/58

Open circuit in P2+ wire harness or P2– wire harness of
squib (2nd step)

P squib (2nd step) malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib, 2nd step)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–570

.

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connectors between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

(c)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the resistance between P2+ and P2–.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

055ZQ–04

H01023

H10600 H16841

H16853

H41981

P Squib

Airbag
Sensor
Assy
Center

DTC B1186/58

DLC3

CG

Tc

05–574

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

739

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect P2+ and P2– of the connec-
tor (on the instrument panel passenger airbag assy side)
between the airbag sensor assy center and the instru-
ment panel passenger airbag assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B1186/58 is not output.

HINT:
Codes other than code B1186/58 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01024

H16841

H41982

Airbag
Sensor
Assy
Center

P Squib

DTC B1186/58

DLC3

CG

Tc

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–575

740

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1186/58 is not output.

HINT:
Codes other than code B1186/58 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

USE SIMULATION METHOD TO CHECK

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P2+

P2–

05–576

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

741

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1187/55 SHORT IN P SQUIB (2ND STEP) CIRCUIT

(TO GROUND)

CIRCUIT DESCRIPTION

The P squib (2nd step) circuit consists of the airbag sensor assy center and instrument panel passenger
airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1187/55 is recorded when ground short is detected in the P squib (2nd step) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1187/55

Short circuit in P squib (2nd step) wire harness (to ground)

P squib malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib, 2nd step)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–570

.

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connector between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

(c)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the resistance between P2+ and body ground.
OK:
Resistance: 1 M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

055ZR–04

H01023

H10600 H16838

H16853

H41983

P Squib

Airbag
Sensor
Assy
Center

DTC B1187/55

DLC3

CG

Tc

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–577

742

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Connect the connector to the airbag sensor assy center.

(b)

Using a service wire, connect P2+ and P2– of the connec-
tor (on the instrument panel passenger airbag assy side)
between the airbag sensor assy center and the instru-
ment panel passenger airbag assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC B1187/55 is not output.

HINT:
Codes other than code B1187/55 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01024

H16838

H41984

P Squib

Airbag
Sensor
Assy
Center

DTC B1187/55

DLC3

CG

Tc

05–578

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

743

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1187/55 is not output.

HINT:
Codes other than code B1187/55 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

R14286

H41424

H41932

P Squib

Airbag
Sensor
Assy
Center

P2+

P2–

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–579

744

Author:

Date:

2004 COROLLA (RM1037U)

DTC

B1188/56 SHORT IN SQUIB (2ND STEP) CIRCUIT (TO

B+)

CIRCUIT DESCRIPTION

The P squib (2nd step) circuit consists of the airbag sensor assy center and instrument panel passenger
airbag assy.
It causes the SRS to deploy when the SRS deployment conditions are satisfied.
DTC B1188/56 is recorded when a B+ short is detected in the P squib (2nd step) circuit.

DTC No.

DTC Detecting Condition

Trouble Area

B1188/56

Short circuit in P squib (2nd step) wire harness (to B+)

P squib (2nd step) malfunction

Airbag sensor assy center malfunction

Instrument panel passenger airbag assy (P squib, 2nd step)

Airbag sensor assy center

Instrument panel wire

WIRING DIAGRAM

See page

05–570

.

INSPECTION PROCEDURE

1

CHECK P SQUIB CIRCUIT(AIRBAG SENSOR ASSY CENTER – INSTRUMENT
PANEL PASSENGER AIRBAG ASSY)

(a)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(b)

Disconnect the connector between the airbag sensor
assy center and the instrument panel passenger airbag
assy.

(c)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

For the connector (on the instrument panel passenger air-
bag assy side) between the airbag sensor assy center
and the instrument panel passenger airbag assy, mea-
sure the voltage between P2+ and body ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE

OK

055ZS–04

H01023

H10600 H16839

H16853

H41985

P Squib

Airbag
Sensor
Assy
Center

DTC B1188/56

DLC3

CG

Tc

05–580

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

745

Author:

Date:

2004 COROLLA (RM1037U)

2

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the connector to the airbag sensor assy center.

(d)

Using a service wire, connect P2+ and P2– of the connec-
tor (on the instrument panel passenger airbag assy side)
between the airbag sensor assy center and the instru-
ment panel passenger airbag assy.

(e)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(f)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(g)

Clear the DTC stored in memory (See page

05–424

).

(h)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(i)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(j)

Check the DTC (See page

05–424

).

OK:
DTC B1188/56 is not output.

HINT:
Codes other than code B1188/56 may be output at this time, but
they are not relevant to this check.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

H10600

H01024

H16839

H41986

P Squib

Airbag
Sensor
Assy
Center

DTC B1188/56

DLC3

CG

Tc

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–581

746

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK P SQUIB

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Connect the instrument panel passenger airbag assy
connector.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(f)

Clear the DTC stored in memory (See page

05–424

).

(g)

Turn the ignition switch to LOCK, and wait at least for 20
seconds.

(h)

Turn the ignition switch to ON, and wait at least for 20 se-
conds.

(i)

Check the DTC (See page

05–424

).

OK:
DTC B1188/56 is not output.

HINT:
Codes other than code B1188/56 may be output at this time, but
they are not relevant to this check.

NG

REPLACE INSTRUMENT PANEL PASSENGER
AIR BAG ASSY

OK

4

USE SIMULATION METHOD TO CHECK

NG

Go to step 1

OK

REPLACE ALL SRS COMPONENTS INCLUDING THE WIRE HARNESS

H42004

Engine Room R/B and J/B

Airbag Sensor Assy Center

B

B–R

1A

1

1

2

MAIN

Instrument Panel J/B

B–R

2

IA4

IM

IM

IL

II

IF

II

IH

II

6

3

5

8

4

3

10

10

B–W

B–W

B

W–B

W–B

W–B

W–B

W–B

W–B

B–O

AM–2

AM2

IG2

A13

A13

A13

5

27

28

IG2

E1

E2

FL MAIN

Battery

I10
Ignition SW

6

5

J6

J/C

J7

J/C

A

A

IE

IG

1

05–582

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

747

Author:

Date:

2004 COROLLA (RM1037U)

SOURCE VOLTAGE DROP

CIRCUIT DESCRIPTION

The SRS is equipped with a voltage–increase circuit (DC–DC converter) in the airbag sensor assy center
in case the source voltage drops.
When the battery voltage drops, the voltage–increase circuit (DC–DC converter) functions to increase the
voltage of the SRS to normal voltage.
The diagnosis system malfunction display for this circuit is different from other circuits that is when the SRS
warning light remains lit up and the DTC is a normal code, source voltage drop is indicated.
Malfunction in this circuit is not recorded in the airbag sensor assy center, and the source voltage returns
to normal, the SRS warning light automatically goes off.

DTC No.

Diagnosis

(Normal)

Source voltage drop

WIRING DIAGRAM

055ZT–07

H40065

IG2

E2

E1

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–583

748

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

PREPARE FOR INSPECTION

(a)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(b)

Remove the horn button assy (See page

60–13

).

(c)

Disconnect the connector of the instrument panel passenger airbag assy (See page

60–26

).

(d)

Disconnect the connector of the front seat airbag assy RH and LH (See page

60–32

).

(e)

Disconnect the connector of the seat belt pretensioner RH and LH (See page

61–9

).

(f)

Disconnect the connectors of the airbag sensor assy center (See page

60–38

).

(g)

Disconnect the connector of the airbag front RH sensor and airbag sensor front LH (See page

60–40

and

60–42

).

(h)

Disconnect the connector of the side airbag sensor assy RH and LH (See page

60–44

).

(i)

Disconnect the connector of the seat position airbag sensor (See page

60–46

).

CAUTION:
Store the horn button assy, instrument panel passenger airbag assy and front seat airbag assy with
the front surface facing upward.

2

CHECK SOURCE VOLTAGE

(a)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(b)

Turn the ignition switch to ON, and wait at least for 60 se-
conds.

(c)

Measure the voltage between E1 (E2) and terminal IG2
on the sensor and operate electric system (defogger, wip-
er, headlight, heater blower, etc.).
OK:
Voltage: 10 – 14 V

NG

REPAIR OR REPLACE HARNESS BETWEEN
BATTERY AND AIRBAG SENSOR ASSY
CENTER,AND CHARGING SYSTEM

OK

05–584

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

749

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK SRS WARNING LIGHT TURN OFF

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(c)

Connect the horn button assy connectors.

(d)

Connect the instrument panel passenger airbag assy connector.

(e)

Connect the front seat airbag assy RH and LH connectors.

(f)

Connect the seat belt pretensioner RH and LH connectors.

(g)

Connect the airbag sensor assy center connectors.

(h)

Connect the front airbag sensor RH and LH connectors.

(i)

Connect the side airbag sensor assy RH and LH connectors.

(j)

Connect the seat position airbag sensor connector.

(k)

Connect the negative (–) terminal cable to the battery.

(l)

Turn the ignition switch to ON, and wait at least for 60 seconds.

(m)

Operate electric system (defogger, wiper headlight, heater blower, etc.) and check that SRS warning
light goes off.
OK:
SRS warning light is not light up.

NG

REPAIR OR REPLACE HARNESS BETWEEN
BATTERY AND AIRBAG SENSOR ASSY
CENTER,AND CHARGING SYSTEM

OK

4

CHECK AIR BAG SENSOR ASSY CENTER

SST

09843–18040

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(c)

Connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON, and wait at least for 20 seconds.

(e)

Clear the DTC stored in memory (See page

05–424

).

(f)

Turn the ignition switch to LOCK, and wait at least for 20 seconds.

(g)

Turn the ignition switch to ON, and wait at least for 20 seconds.

(h)

Check the DTC (See page

05–424

).

OK:
DTC is not output.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

USE SIMULATION METHOD TO CHECK

H42005

Instrument Panel J/B

LA

A13

3

B–Y

W–B

5

E1

1

27

Engine Room R/B and J/B

IA4

B

I10
Ignition SW

6

FL MAIN

Battery

E2

28

W–B

2

2

II

B

IH

14

1A

3

A13

A13

4C

B–R

B

39

8

5

4

B–Y

1

W–B

Airbag Sensor Assy Center

II

II

MAIN

B–R

4C

4B

4B

15

18

21

IJ

IF

IK

IM

IM

IL

AM2

AM2

IG2

W–B

3

B–O

B–Y

W–B

32

5

1

10

10

A

A

A

IE

IG

J6
J/C

J7
J/C

B–W

6

W–B

SRS

C9
Combination Meter

1

2

Center J/B

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–585

750

Author:

Date:

2004 COROLLA (RM1037U)

SRS WARNING LIGHT CIRCUIT MALFUNCTION (ALWAYS LIGHT

UP, WHEN DTC IS NOT OUTPUT)

CIRCUIT DESCRIPTION

The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from the LOCK position to ON position, and then turns off automatically.
If there is a malfunction in the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and CG of the DLC3 are connected, the DTC is displayed by blinking the SRS warning
light.

WIRING DIAGRAM

055ZU–05

H42000

H41993

SW

05–586

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

751

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK CONNECTOR

(a)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(b)

Check the connection of the combination meter connector and the airbag sensor assy center connec-
tors.
OK:
The connectors are connected.

NG

CONNECT CONNECTORS

OK

2

CHECK COMBINATION METER ASSY

(a)

Disconnect the connector from the combination meter.

(b)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(c)

Turn the ignition switch to ON, and wait at least for 6 se-
conds.

(d)

Measure the voltage between SW and body ground.
OK:
Voltage: Above 8 V

NG

REPLACE COMBINATION METER ASSY

OK

H40065

LA

H41994

Airbag Sensor Assy Center:

Combination Meter:

LA

SW

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–587

752

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY
CENTER–COMBINATION METER ASSY)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Disconnect the connector from the airbag sensor assy
center.

(d)

Measure the resistance between LA and body ground.
OK:
Resistance: 1M

Ω

or Higher

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE (AIRBAG SENSOR ASSY CENTER – COM-
BINATION METER ASSY)

OK

REPLACE AIR BAG SENSOR ASSY CENTER

4

CHECK INSTRUMENT PANEL WIRE(AIRBAG SENSOR ASSY
CENTER–COMBINATION METER ASSY)

(a)

For the connector (on the airbag sensor assy center side)
between the combination meter and the airbag sensor
assy center, measure the resistance between SW and
LA.
OK:
Resistance: Below 1

Ω

NG

REPAIR OR REPLACE INSTRUMENT PANEL
WIRE (AIRBAG SENSOR ASSY CENTER – COM-
BINATION METER ASSY)

OK

REPLACE AIR BAG SENSOR ASSY CENTER

05–588

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

753

Author:

Date:

2004 COROLLA (RM1037U)

SRS WARNING LIGHT CIRCUIT MALFUNCTION (DOES NOT LIGHT

UP, WHEN IGNITION SWITCH IS TURNED TO ON)

CIRCUIT DESCRIPTION

The SRS warning light is located on the combination meter.
When the SRS is normal, the SRS warning light lights up for approx. 6 seconds after the ignition switch is
turned from the LOCK position to ON position, and then turns off automatically.
If there is a malfunction is the SRS, the SRS warning light lights up to inform the driver of the abnormality.
When terminals Tc and CG of the DLC3 are connected, the DTC is displayed by blinking the SRS warning
light.

WIRING DIAGRAM

See page

05–585

.

INSPECTION PROCEDURE

1

CHECK SOURCE VOLTAGE

(a)

Measure the voltage of the battery.
OK:
Voltage: 10 – 14 V

NG

REPAIR OR REPLACE HARNESS BETWEEN
BATTERY AND AIRBAG SENSOR ASSY
CENTER,AND CHARGING SYSTEM

OK

2

CHECK AIR BAG SENSOR ASSY CENTER

(a)

Disconnect the negative (–) terminal cable from the battery, and wait at least for 90 seconds.

(b)

Disconnect the connectors from the airbag sensor assy center.

(c)

Connect the negative (–) terminal cable to the battery, and wait at least for 2 seconds.

(d)

Turn the ignition switch to ON.

(e)

Check SRS warning light light up in the combination meter assy.
OK:
Not SRS warning light light up.

NG

REPLACE AIR BAG SENSOR ASSY CENTER

OK

055ZV–04

H42000

H41994

Airbag Sensor Assy Center:

Combination Meter:

LA

SW

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–589

754

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK WIRE HARNESS(COMBINATION METER ASSY – AIRBAG SENSOR ASSY
CENTER)

(a)

Turn the ignition switch to LOCK.

(b)

Disconnect the negative (–) terminal cable from the bat-
tery, and wait at least for 90 seconds.

(c)

Disconnect the connector from the combination meter.

(d)

Connect the negative (–) terminal cable to the battery,
and wait at least for 2 seconds.

(e)

Turn the ignition switch to ON.

(f)

For the connector (on the airbag sensor assy center side)
between the airbag sensor assy center and the combina-
tion meter, measure the voltage between LA and body
ground.
OK:
Voltage: Below 1 V

NG

REPAIR OR REPLACE HARNESS BETWEEN
AIRBAG SENSOR ASSY CENTER AND
COMBINATION METER ASSY

OK

REPAIR OR REPLACE COMBINATION METER ASSY OR WIRE HARNESS BETWEEN
COMBINATION METER ASSY AND BATTERY

H42006

Airbag Sensor Assy Center

A13 Tc

19

P–B

W–B

II

IJ

1

4

IE

4B

4C

4B

5

3

16

21

P–B

W–B

Tc

CG

13

4

D1
DLC3

Center J/B

Instrument Panel J/B

4C

P–B

A

J6
JC

05–590

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

755

Author:

Date:

2004 COROLLA (RM1037U)

TC TERMINAL CIRCUIT

CIRCUIT DESCRIPTION

DTC output mode is set by connecting between TC and CG of the DLC3.
The DTCs are displayed by blinking the SRS warning light.

WIRING DIAGRAM

HINT:
When each warning light stays blinking, ground short in the wiring until the terminal TC of the DLC3 or internal
ground short in each ECU is suspected.

055ZW–05

H40065

H40173

H43360

TC

DLC3:

Airbag Sensor Assy Center:

TC

H40173

CG

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

05–591

756

Author:

Date:

2004 COROLLA (RM1037U)

INSPECTION PROCEDURE

1

CHECK WIRE HARNESS(DLC3 – AIRBAG SENSOR ASSY CENTER)

(a)

Turn the ignition switch to the LOCK position.

(b)

Disconnect the aribag sensor assy center connector.

(c)

Measure the resistance according to the value(s) in the
table below.
Standard:

Tester connection

Condition

Specified condition

TC – TC

Always

Below 1

Ω

NG

REPAIR OR REPLACE WIRE HARNESS(TC of
ELC3 – TC of AIRBAG SENSOR ASSY CENTER)

OK

2

CHECK WIRE HARNESS(CG of DLC3 – BODY GROUND)

(a)

Measure the resistance according to the value(s) in the
table below.
Standard:

Tester connection

Condition

Specified condition

CG – Body ground

Always

Below 1

Ω

NG

REPAIR OR REPLACE WIRE HARNESS(CG of
DLC3 – BODY GROUND)

OK

H40065

TC

05–592

–

DIAGNOSTICS

SUPPLEMENTAL RESTRAINT SYSTEM (April, 2003)

757

Author:

Date:

2004 COROLLA (RM1037U)

3

CHECK WIRE HARNESS(TC of AIRBAG SENSOR ASSY CENTER – BODY
GROUND)

(a)

Measure the resistance according to the value(s) in the
table below.
Standard:

Tester connection

Condition

Specified condition

TC – Body ground

Always

1 M

Ω

or Higher

NG

REPAIR OR REPLACE WIRE HARNESS AND
EACH ECU

OK

REPLACE AIR BAG SENSOR ASSY CENTER