545RFE Automatic Transmission

U0002-CAN C BUS OFF PERFORMANCE

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


Theory of Operation


Some NGC controllers communicate with other controllers over the CAN C Bus. The transmission controller continuously monitors the Bus activity and receives the messages it needs. 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, the Engine Controller will light the MIL.


- When Monitored:

Every 7 msec. when:


1) Engine speed greater than 500 RPM.


2) Battery voltage greater than 10v but less than 16v.

- Set Condition:

CAN C Bus messages not received for 10 seconds.


Diagnose the U0002 CAN C BUS OFF PERFORMANCE as the U0001 CAN C BUS CIRCUIT test in Communications for diagnostic procedures and for further possible causes.