1020-00

1020-00 NO COMMUNICATION WITH POWER TOP CONTROL MODULE (PTCM)





- When Monitored: Continuous with the ignition on.
- Set Condition: CAN Bus communication failure between the Body Control Module (BCM) and the Power Top Control Module (PTCM).





For a complete Body Control Module Circuit Diagram. Body - Electrical Diagnostics.

Diagnostic Test

1. OPEN CAN B BUS (+) CIRCUIT




Turn the ignition off.
Disconnect the Power Top Control Module (PTCM) C1 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 PTCM C1 harness connector to the BCM harness connector.
Is the resistance below 5.0 ohm?

Yes

- Go To 2

No

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

2. OPEN CAN B BUS (-) CIRCUIT




With the ignition off.
Measure the resistance of the CAN B Bus (-) circuit from the PTCM C1 harness connector to the BCM harness connector.
Is the resistance below 5.0 ohm?

Yes

- Replace the Power Top Control Module.Removal
- Perform BODY VERIFICATION TEST. Body Verification Test

No

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