40/41TE Automatic Transaxle (NGC)

U0100 LOST COMMUNICATION WITH ECM/PCM

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.