Diagnostic Test

VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
NOTE: Make sure the IOD fuse is installed and the battery is fully charged before proceeding.
1. Turn the ignition on.
2. With the scan tool, read the active Door Module DTCs.
  Is this DTC active?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and perform the U0168-Lost Communication with Vehicle Security Control Module (SKREEM/WCM) diagnostic procedure.
  No
  - Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing .