Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC

NOTE:

If DTC U0002-00-CAN C BUS OFF PERFORMANCE is set in the Body Control Module (BCM), diagnose this DTC before continuing with this diagnostic procedure.

With the scan tool, read the Body Control Module (BCM) DTCs and record on the repair order.
Is the DTC active?

Yes
- Refer to DIAGNOSIS AND TESTING and perform the NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) diagnostic procedure.
No
- Refer to DIAGNOSIS AND TESTING and perform the STORED LOST COMMUNICATION DTCS diagnostic procedure.