Diagnostic Procedure

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. With the scan tool, read active Cluster DTCs.
  Is this DTC active?
  
  Yes
  - Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing and perform the U0141-Lost Communication with IPM (FCM/TIPM) diagnostic procedure.
  No
  - Refer to Non-DTC Diagnostics/Communication - Diagnosis and Testing and perform the Stored Lost Communication DTCs diagnostic procedure.