1025-00

1025-00 CAN B BUS (+) CIRCUIT FAILURE







- When Monitored: Continuous.
- Set Condition: CAN B Bus (+) communication failure between the Body Control Module (BCM) and the Central Locking Pump/Security System Module (CLP/SSM).





Diagnostic Test

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





Turn the ignition off.

Disconnect the BCM harness connector.

Disconnect the CLP/SSM harness connector.

NOTE: Check connectors - Clean/repair as necessary.


Measure the resistance of the CAN B Bus (+) circuit from the BCM harness connector to the CLP/SSM 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 VOLTAGE OF THE CAN B BUS (+) CIRCUIT





Turn the ignition on.

Measure the voltage of the CAN B Bus (+) circuit at the CLP/SSM harness connector.

Is voltage present?

Yes

- Repair the CAN B Bus (+) circuit for a short to voltage.
- Perform BODY VERIFICATION TEST. Body Verification Test.

No

- Go to 3

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





Turn the ignition off.

Measure the resistance between ground and the CAN B Bus (+) circuit at the CLP/SSM harness connector.

Is the resistance below 10K ohms?

Yes

- Repair the CAN B Bus (+) circuit for a short to ground.
- Perform BODY VERIFICATION TEST. Body Verification Test.

No

- Replace the Central Locking Pump/Security System Module.
- Perform BODY VERIFICATION TEST. Body Verification Test.