Diagnostic Test

VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE
NOTE: Make sure the IOD fuse is installed and battery Voltage is between 10 and 16 Volts before proceeding.
1. Using a scan tool, read active 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 (WIN) diagnostic procedure.
  No
  - Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the Stored Lost Communication DTCs diagnostic procedure.