2009 BRAKES

Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

DIAGNOSIS AND TESTING

ESP SWITCH CIRCUIT

Fig. 1: ESP Switch Circuit Schematic

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

steve

Monday, May 30, 2011 12:07:01 PM

Page 1

© 2006 Mitchell Repair Information Company, LLC.

steve

Monday, May 30, 2011 12:07:10 PM

Page 1

© 2006 Mitchell Repair Information Company, LLC.

Courtesy of CHRYSLER LLC

For complete wiring diagrams refer to:



SYSTEM WIRING DIAGRAMS for Town & Country.



SYSTEM WIRING DIAGRAMS for Grand Caravan.



When Monitored:

With the ignition on.



Set Condition:

When the Anti-Lock Brake Module indicates that the ESP Switch is low for 30 seconds.

Diagnostic Test

1. ESP SWITCH CIRCUIT

1. Turn the ignition on.

2. Turn the ESP switch on then off.

3. Check for car icon on solid in cluster and pressing ESP switch does not change state.

4. With the scan tool, read the switch state for the ESP switch with no pressure on the brake, read and

record DTCs.

Does the scan tool display switch state indicating pressed?

Yes



Go to 2

No



The condition that caused the symptom is currently not present. Inspect the related wiring for
a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken
wires.

Possible Causes

STUCK CLOSED ESP SWITCH
(Z905) GROUND CIRCUIT OPEN
(B46) ESP CONTROL SWITCH SENSE CIRCUIT SHORTED TO GROUND
ANTI-LOCK BRAKE MODULE

NOTE:

If any other DTCs are present they must be repaired before continuing.

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

steve

Monday, May 30, 2011 12:07:01 PM

Page 2

© 2006 Mitchell Repair Information Company, LLC.



Refer to the ABS INTERMITTENT CONDITION TEST. Refer to DTC-Based
Diagnostics/MODULE, Anti-Lock Brake (ABS) - Standard Procedure .

2. (Z905) OPEN CIRCUIT

Fig. 2: Checking Ground Circuit For Open Circuit Or High Resistance
Courtesy of CHRYSLER LLC

1. Turn the ignition off.

2. Disconnect the ESP switch.

3. Using a 12-volt test light connected to 12 volts, check the (Z905) ground circuit.

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

steve

Monday, May 30, 2011 12:07:01 PM

Page 3

© 2006 Mitchell Repair Information Company, LLC.

Does the test light illuminate brightly?

Yes



Go to 3

No



Repair (Z905) ground circuit for an open circuit or high resistance.



Perform ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE,
Antilock Brake (ABS) - Standard Procedure .

3. CHECK FOR A STUCK ESP SWITCH

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

steve

Monday, May 30, 2011 12:07:01 PM

Page 4

© 2006 Mitchell Repair Information Company, LLC.

Fig. 3: Checking Stuck ESP Switch
Courtesy of CHRYSLER LLC

1. Turn the ignition off.

2. Measure the internal resistance of the ESP Switch between the (B46) ESP control circuit and

(Z905) ground circuit.

Is the resistance below 5.0 ohms?

Yes



Replace the ESP Switch in accordance with the appropriate service information.

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

steve

Monday, May 30, 2011 12:07:01 PM

Page 5

© 2006 Mitchell Repair Information Company, LLC.



Perform ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE,
Antilock Brake (ABS) - Standard Procedure .

No



Go to 4

4. ESP CONTROL CIRCUIT

Fig. 4: Checking ESP Control Circuit For Short To Ground
Courtesy of CHRYSLER LLC

1. Turn the ignition off.

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

steve

Monday, May 30, 2011 12:07:01 PM

Page 6

© 2006 Mitchell Repair Information Company, LLC.

2. Disconnect the ESP Switch.

3. Disconnect the Anti-Lock Brake Module harness connector.

4. Measure the resistance of the (B46) ESP control circuit to ground.

Is the resistance below 5.0 ohms?

Yes



Repair the (B46) ESP control circuit for a short to ground.



Perform ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE,
Antilock Brake (ABS) - Standard Procedure .

No



Replace the Anti-Lock Brake Module in accordance with the appropriate service information.



Perform ABS VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE,
Antilock Brake (ABS) - Standard Procedure .

2009 Chrysler Town & Country LX

2009 BRAKES Brakes - Non-DTC Diagnostics - Grand Caravan, Town & Country

steve

Monday, May 30, 2011 12:07:01 PM

Page 7

© 2006 Mitchell Repair Information Company, LLC.