Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC

NOTE:

Make sure the battery voltage is between 10 and 16 volts before proceeding.

Turn the ignition on.
With the scan tool, create a Vehicle Scan Report and attach it to the repair order
With the scan tool, read RF Hub DTCs.
Is the DTC active?

Yes
- For the DTC U0001-00 Can C Bus, use the U0002-00 Can C Bus Off Performance diagnostic procedure.
- Perform the U0002-00 CAN C Bus Off Performance diagnostic procedure in the BCM. Refer to DTC INDEX - 2500 HD & 3500 HD .
No
- Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to DIAGNOSIS AND TESTING .