Powertrain Control Module (PCM)

U0168-LOST COMMUNICATION WITH VEHICLE SECURITY MODULE (SKREEM/WCM)

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Ignition run time is greater than one second. Battery voltage between 9 and 16 volts. Engine run time greater than three seconds.

- Set Condition:
The Powertrain Control Module (PCM), doesn't receive a SKREEM message over the CAN C circuit for seven consecutive seconds. The circuit is continuously monitored.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.
ACTIVE DTC

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

1. Ignition on, engine not running.
2. With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Testing and Inspection and perform the U0168-Lost Communication with Vehicle Security Module (WCM) diagnostic procedure.

No

- Stored Lost Communication DTCs and perform the Stored Lost Communication DTC diagnostic procedure.