Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
NOTE:
For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.
1. Turn the ignition on.
2. With a scan tool, read the active DTCs.
  Does the scan tool display: U0002-00-CAN C BUS OFF PERFORMANCE?
  
  Yes
  - Refer to DTC INDEX - 1500 and perform the U0002-Can C Bus Off Performance diagnostic procedure.
  No
  - Refer to DIAGNOSIS AND TESTING and perform the Stored Lost Communication DTCs diagnostic procedure.