No Response From ABS (Antilock Brake Module)

*NO RESPONSE FROM ABS (ANTILOCK BRAKE MODULE)





For a complete wiring diagram Refer to Diagrams/Electrical.





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.

NOTE: Check the FCM for any active CAN C hardware DTCs, perform DTC before proceeding.

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

Yes

- Go To 2

No

- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.

2.(A107) (A111) 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 (A111) Fused B(+) circuit.

Does the test light illuminate brightly for each circuit?

Yes

- Go To 3

No

- Repair the Fused B(+) circuit for an open or short.
- Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test

3.(Z903) GROUND CIRCUIT OPEN





Using a 12-volt test light connected to 12-volts, check the (Z903) ground circuit.

Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (Z903) ground circuit for an open.
- Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test

4.(F202) FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN OR SHORTED





Turn the ignition on.

Using a 12-volt test light connected to ground, check the (F202) Fused Ignition Switch Output circuit.

Does the test light illuminate brightly?

Yes

- Go To 5

No

- Repair the (F202) Fused Ignition Switch Output circuit for an open or short.
- Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test

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





Turn the ignition off.

Disconnect the FCM C1 harness connector.

Measure the resistance of the (D65) CAN C Bus (+) circuit between the FCM connector and the Antilock Brake Module connector.

Is resistance below 5.0 ohms?

Yes

- Go To 6

No

- Repair the (D65) CAN C Bus (+) circuit for an open.
- Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test

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





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

Is resistance below 5.0 ohms?

Yes

- Replace the Antilock Brake Module.
- Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test

No

- Repair the (D64) CAN C Bus (-) circuit for an open.
- Perform ABS VERIFICATION TEST - VER 1. ABS Verification Test