Powertrain Control Module (PCM)

U0101-LOST COMMUNICATION WITH TCM

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

- When Monitored:
Ignition run time is greater than one second.

Battery voltage between 10.0 and 16.0 Volts.

- Set Condition:
The Powertrain Control Module (PCM) doesn't receive a Bus Message from the Transmission Control Module for approximately two to five seconds.





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

Diagnostic Test
DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, select view DTCs.
3. Monitor the scan tool for at least two minutes.

Is the status Active for this DTC?

Yes

- Perform the diagnostic procedure for U0101 - LOST COMMUNICATION WITH TRANSMISSION CONTROL MODULE (TCM). Totally Integrated Power Module (TIPM)

No

- Manufacturer Code Charts and perform the Stored Lost Communication DTCs diagnostic procedure.