Diagnostic Test

VERIFY DTC IS ACTIVE
NOTE: Ensure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding.
1. Ignition on, engine not running.
2. 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 .