Powertrain Control Module (PCM)

U0141 LOST COMMUNICATION WITH FCM

For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

The NGC controller communicates over the CAN C BUS. The transmission controller continuously monitors BUS activity. The CAN C BUS is also used to communicate transmission MIL status to the Engine Controller. If the Engine Controller is unable to communicate with the Transmission Controller, a DTC will set and the Engine Controller will illuminate the MIL.

- When Monitored:

Every 7 ms with:

1) Engine speed greater than 500 RPM.

2) Battery voltage between 10 and 16 volts.

- Set Condition:

CAN C BUS messages are not received for 10 seconds.

Refer to DTC Based Diagnostics and Non DTC Based Diagnostics for diagnostic procedures and other possible causes.