1269-00

1269-00 NO COMMUNICATION FROM CAB MODULE







- When Monitored: Continuous.
- Set Condition: CAN Bus communication failure between the Body Control Module (BCM) and the Controller Antilock Brake Module (CAB).





Diagnostic Test

1. MEASURE THE RESISTANCE OF THE CAN B BUS (+) CIRCUIT





Turn the ignition off.

Disconnect the CAB harness connector.

Disconnect the BCM harness connector.

NOTE: Check connectors - Clean/repair as necessary.


Measure the resistance of the CAN B Bus (+) circuit from the CAB harness connector to the BCM harness connector.

Is the resistance below 1.0 ohm?

Yes

- Go to 2

No

- Repair the CAN B Bus (+) circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test.

2. MEASURE THE RESISTANCE OF THE CAN B BUS (-) CIRCUIT





Measure the resistance of the CAN B Bus (-) circuit from the CAB harness connector to the BCM harness connector.

Is the resistance below 1.0 ohm?

Yes

- Replace the Controller Antilock Brake Module.
- Perform BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the CAN B Bus (-) circuit for an open.
- Perform BODY VERIFICATION TEST. Body Verification Test.