Diagnostic Test

CHECK FOR AN ACTIVE DTC

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 a scan tool, read DTCs and record on the repair order.
Record the Environmental Data.
With a scan tool, read DTCs.
Is the DTC active?

Yes
- Refer to DIAGNOSIS AND TESTING and perform the No Response from BCM (Body Control Module) test.
No
- Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.