Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY THE DTC IS ACTIVE

Turn the ignition on.
With the scan tool, read DTCs and record on vehicle work order.
Is the DTC active at this time?

Yes
- Perform the U0100-00-LOST COMMUNICATION WITH ECM/PCM diagnostic procedure. Refer to DIAGNOSIS AND TESTING .
No
- Perform the STORED LOST COMMUNICATION DTCs diagnostic procedure. Refer to DIAGNOSIS AND TESTING .