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.
- VERIFY DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE 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.
- Turn the ignition on.
- With the scan tool, read active DTCs.
Is this DTC active?
Yes
- Refer to DTC INDEX - 2500 HD & 3500 HD 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.