2007 Liberty KJ Factory Service Manual 8 - ELECTRICAL

*NO RESPONSE FROM ABS (ANTILOCK BRAKE MODULE)





For a complete wiring diagram Refer to Section 8W.



Possible Causes
 
(A107) (A200) FUSED B(+) CIRCUIT OPEN OR SHORTED
 
(Z107) (Z127) GROUND CIRCUIT OPEN
 
(F1) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED
 
(D65) CAN C BUS (+) CIRCUIT OPEN
 
(D64) CAN C BUS (-) CIRCUIT OPEN
 
ANTILOCK BRAKE MODULE
 




Diagnostic Test

1. TEST FOR INTERMITTENT CONDITION

Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.


With the scan tool, select ECU view.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.



Does the scan tool display a red X next to the module?

Yes


No

2. (A107) (A200) FUSED B(+) CIRCUIT OPEN OR SHORTED



Turn the ignition off.
Disconnect the Antilock Brake Module harness connector.
Using a 12-volt test light connected to ground, check each (A107) and (A200) Fused B(+) circuit.

Does the test light illuminate brightly for each circuit?

Yes


No

3. (Z107) (Z127) GROUND CIRCUIT OPEN



Using a 12-volt test light connected to 12-volts, check each (Z107) and (Z127) ground circuit.

Does the test light illuminate brightly for each circuit?

Yes


No

4. (F1) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED



Turn the ignition on.
Using a 12-volt test light connected to ground, check the (F1) Fused Ignition Switch Output circuit.

Does the test light illuminate brightly?

Yes


No

5. (D65) CAN C BUS (+) CIRCUIT OPEN



Turn the ignition off.
Disconnect the scan tool from the DLC connector.
Measure the resistance of the (D65) CAN C Bus (+) circuit between the DLC connector and the Antilock Brake Module connector.

Is resistance below 5.0 ohms?

Yes


No

6. (D64) CAN C BUS (-) CIRCUIT OPEN



Measure the resistance of the (D64) CAN C Bus (-) circuit between the DLC connector and the Antilock Brake Module connector.

Is resistance below 5.0 ohms?

Yes


No