Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY THE DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, select view DTCs.
  Is the DTC Active at this time?
  
  Yes
  
  NOTE:
  Diagnose the U0002-88 CAN C BUS OFF PERFORMANCE-BUSS OFF as the U0010-00 CAN C BUS CIRCUIT test.
  - Perform the U0010-00-CAN C BUS diagnostic procedure. Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX - 2500 HD & 3500 HD article .
  No
  - Perform the STORED LOST COMMUNICATION DTCs diagnostic procedure. Refer to DIAGNOSIS AND TESTING .