Electronically Controlled Clutch (ECC)

U0121-LOST COMMUNICATION WITH ABS

For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

The ABS communicates with other controllers over the CAN C bus. The AWD Module continuously monitors the bus activity and receives the messages it needs. The CAN C bus is also used to communicate AWD Control Module MIL status to the Engine Controller, therefor if the Engine Controller is unable to communicate with the AWD Control Module, the Engine Controller will light the MIL.

- When Monitored:
Every 7 msec. Conditions: Battery voltage greater than 10v but less than 16v.

- Set Condition:
CAN C bus messages not received for 10 seconds.

Refer to Communications Test for this DTC and/or Manufacturer Code Charts for diagnostic procedures and for further possible causes.