Diagnostic Test
- VERIFY DTC IS ACTIVE
- Ignition on, engine not running.
- Using a scan tool, read ACC DTCs.
Is the DTC active at this time?
Yes
- Perform the appropriate diagnostic procedure. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing .
No
- Perform the Stored Lost Communication DTCs diagnostic test procedure. Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing .