Powertrain Control Module (PCM)

U0101-LOST COMMUNICATION WITH TCM





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

- When Monitored:
With the ignition on, the battery voltage between 9 and 16 volts, and engine run time greater than three seconds.

- Set Condition:
The Powertrain Control Module (PCM) doesn't receive a bus message from the indicated module for a specific amount of time.





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. Turn the ignition on.
2. With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Totally Integrated Power Module (TIPM) Perform the U0101-Lost Communication With TCM diagnostic procedure.

No

- Perform the Stored Lost Communication DTCs diagnostic procedure. Stored Lost Communication DTCs