Diagnostic Test

CHECK FOR ACTIVE DTCS
1. With the scan tool, read the active WIN DTCs.
2. Cycle the ignition switch from off to on at least 3 times, leaving the ignition on for a minimum of one minute per cycle.
3. With the scan tool, read the active WIN DTCs.
  Does the scan tool display: U0001-CAN C BUS as active?
  
  Yes
  - Refer to TOTALLY INTEGRATED POWER MODULE (TIPM) - DIAGNOSTIC CODE INDEX and perform the U0001-CAN C BUS diagnostic procedure.
  No
  - Refer to DIAGNOSIS AND TESTING and perform the STORED LOST COMMUNICATION DTCS diagnostic procedure.