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 and 16 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.

Possible Causes:

1. VERIFY DIAGNOSTIC TROUBLE CODE (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 this DTC active?

Yes

- perform the appropriate diagnostic procedure.

No

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