1000 - 1999: 1022

1022 - NO CAN COMMUNICATIONS WITH PCM





When Monitored and Set Condition

- When Monitored: With the ignition on.
- Set Condition: CAN Bus communication failure between the Controller Antilock Brake (CAB) and the Powertrain Control Module (PCM).





For a complete Antilock Brake System (ABS) Circuit Diagram Brakes - ABS Electrical Diagnostics.

Diagnostic Test

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




Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the PCM harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Measure the resistance of the CAN C Bus (+) circuit from the CAB harness connector to the PCM harness connector.
Is the resistance below 1.0 ohm?

Yes

- Go to 2

No

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

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




With the ignition off.
Measure the resistance of the CAN C Bus (-) circuit from the CAB harness connector to the PCM harness connector.
Is the resistance below 1.0 ohm?

Yes

- Replace the Controller Antilock Brake (CAB) Module. Removal.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

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