42RLE Automatic Transmission

U0141 LOST COMMUNICATION WITH FCM





For a complete wiring diagram refer to Diagrams/Electrical. Electrical Diagrams


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 msec 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 Communications for diagnostic procedures and for further possible causes.