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 IF THE DTC IS ACTIVE
NOTE:
Make sure the battery is fully charged before proceeding.
1. Turn the ignition on.
2. With the scan tool, read active DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Refer to DTC INDEX and perform the U0155-Lost Communication with Cluster/CCN diagnostic procedure.
  No
  - Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.