1

2

3

4

A

B

C

D

4

3

2

1

D

C

B

A

Title

Number

Revision

Size

A4

Date:

5-Jul-2005

Sheet of

File:

F:\Projects\..\006-01_4.sch

Drawn By:

REV 4

1 1

PL

Diagnostic Port I/F

R1
6K8

R2

4K7

R3
1K

R4

4K7

VCC

VCC

VCC

Pwr ON LED

To PC

GND

VCC

C2
1.0

C3
1.0

C4
1.0

C5
1.0

To ECU

Tx
Rx
CLK
IGN
GND

Vin

1

GND

2

+5V

3

U3

78L05

Q1

BC549

top view

BC549

top view

78L05

IP

GN
D

OP

C

B

E

1
2
3
4
5

X1

+

C7

10uF/25V

D2
Green, 3mm

D3
Yellow, 3mm

R9
1K

R6
1K

D4
Red, 3mm

ECU Tx LED

ECU Rx LED

R7
1K

If you use a MAX232A then C2 - C5 can be 0.1uF,
if you use a MAX232 then C2 - C5 must be 1.0uF

1
2
3

X2

PC Rx
PC Tx

DB9.2

DB9.3
DB9.5

CIN

11

COUT

9

COUT

10

RST

12

Q4

7

Q5

5

Q6

4

Q7

6

Q8

14

Q9

13

Q10

15

Q12

1

Q13

2

Q14

3

VCC

16

GND

8

U2

4060

Y1

2.4576M

C10

30p

C9

30p

R8 10M

VCC

153.6Khz (9600 baud)

C8

0.1

R10
1K

R11

4K7

Q2

BC549

top view

BC549

C

B

E

R5

1K

R12

1K

C11

0.1

VCC

C12
0.001u

1

2

3

X3

or 4.9152M

+12V (red)

Tx (yell)

Rx (blu)

Clk (white)

GND (grn)

green

red

white

blue

yellow

CONSULT CONNECTOR (looking into connector on vehicle)

PLMS

DEVELOPMENTS

JUMPER FOR XTAL SELECTION

Current: Idle 36mA, Operate 44mA

C1+

1

R1 OUT

12

T1 IN

11

C2+

4

T2 IN

10

R2 OUT

9

GND

15

R1 IN

13

R2 IN

8

C2-

5

VCC

16

T1 OUT

14

T2 OUT

7

C1-

3

V-

6

V+

2

U1

MAX232

3

2

1

8

4

U4A

LM358

R14
4K7

R13
10K

VCC

C13

0.1u

+

C1

1.0

006-01

PLMS DEVELOPMENTS 2005

c