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.

DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, select view DTCs.
3. Monitor the scan tool for at least two minutes.
  Is the status Active for this DTC?
  
  Yes
  - Refer to DTC INDEX - 2500 HD & 3500 HD and perform the diagnostic procedure for U0101 - LOST COMMUNICATION WITH TRANSMISSION CONTROL MODULE (TCM).
  No
  - Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.