U0077

U0077-CONTROL MODULE COMMUNICATION BUS OFF

For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Ignition on, battery voltage between 9 and 16 volts.

- Set Condition:
The Transmission Control Module (TCM) Module has detected catastrophic failure on the CAN bus.





VERIFY THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, read the DTCs.

Is the DTC Active at this time?

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Perform the Stored Lost Communication DTCs diagnostic procedure Stored Lost Communication DTCs.