Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. 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 DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Refer to U0001-CAN C BUS for 1500, 2500 and 3500. diagnostic procedure.
  No
  - Refer to STORED LOST COMMUNICATION DTCS for 1500, 2500 and 3500 diagnostic procedure.