Diagnostic Test
- VERIFY THE DTC IS ACTIVE NOTE:
For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.
- Turn the ignition on.
- With the scan tool, read active DTCs.
Is the DTC active at this time?
Yes
- Refer to the DTC INDEX article and perform the U0002-CAN C BUS OFF PERFORMANCE diagnostic procedure.
No
- Refer to DIAGNOSIS AND TESTING and perform the STORED LOST COMMUNICATION DTCs diagnostic procedure.