6.7L Diesel

U0001-CAN C BUS

For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

Ignition run time is greater than 1 second. Battery voltage between 9 and 16 volts. Engine run time greater than 3 seconds.

- Set Condition:

The ECM loses communication over the CAN C Bus circuit. The circuit is continuously monitored. One Trip fault.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.


Refer to Communications for diagnostic procedures and for further possible causes.

Diagnostic Test


1. ACTIVE DTC

Ignition on, engine not running.

With a scan tool, read FCM (TIPM) DTCs.

Is the DTC active at this time?

Yes

- Refer to Communications for diagnostic procedures and for further possible causes.

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test