9000 - 9999: 9078

9078 - NO COMMUNICATION WITH CENTRAL LOCKING PUMP/SECURITY SYSTEM MODULE (CPL/SSM)





- When Monitored: Continuous with the ignition on.
- Set Condition: CAN Bus communication failure between the Central Locking Pump/Security System Module and the Power Top Control Module (PTCM).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test

1. Open CAN B Bus (+) circuit




Turn the ignition off.
Disconnect the Power Top Control Module (PTCM) C1 harness connector.
Disconnect the Central Locking Pump/Security System Module (CLP/SSM) 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 CLP/SSM harness connector.
Is the resistance below 5.0 ohm?

Yes

- Go To 2

No

- Repair the PTCM CAN B Bus (+) circuit for an open.
- Perform POWER TOP CONTROL MODULE VERIFICATION TEST. Power Top Verification Test

2. Open CAN B Bus (-) circuit




Measure the resistance of the CAN B Bus (-) circuit from the PTCM C1 harness connector to the CLP/SSM harness connector.
Is the resistance below 5.0 ohm?

Yes

- Replace the Power Top Control Module.Removal
- Perform POWER TOP CONTROL MODULE VERIFICATION TEST. Power Top Verification Test

No

- Repair the PTCM CAN B Bus (-) circuit for an open.
- Perform POWER TOP CONTROL MODULE VERIFICATION TEST. Power Top Verification Test