42RLE

U0121 LOST COMMUNICATION WITH ABS





For the Transmission circuit diagram, refer to Wiring Diagram Information.
^ 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.

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.
Refer to ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING for diagnostic procedures and for further possible causes.