Powertrain

U0101-LOST COMMUNICATION WITH TCM

For a complete wiring diagram refer to Diagrams/Electrical.

- When Monitored:

Ignition run time is greater than 1 second. Battery voltage between 9 and 16 volts. Engine run time greater than 3 seconds.

- Set Condition:

The PCM doesn't receive a Bus Message from the Transmission Control Module for 7 consecutive seconds. The circuit is continuously monitored. One trip fault.





Refer to communications for diagnostic procedures and for further possible causes.

Diagnostic Test

1. ACTIVE DTC

Ignition on, engine not running.

With a scan tool, View PCM DTCs.

Is the DTC Active at this time?

Yes

- Refer to communications for diagnostic procedures and for further possible causes.

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test