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:
Diagnose all CAN communication DTCs before continuing.
- Turn the ignition on.
- With the scan tool, read DTCs and record on the repair order.
Is the DTC active or pending?
Yes
- Go To 2
No
- Perform the STORED LOST COMMUNICATION DTCs diagnostic procedure. Refer to DIAGNOSIS AND TESTING .
- ABS/ESP COMMUNICATION RELATED DTCS IN OTHER MODULES
- With a scan tool check for ABS/ESP communication related DTCs in other modules on the CAN Bus.
Are there any ESP communication related DTCs in other modules on the CAN Bus at this time?
Yes
- Perform the U0121-LOST COMMUNICATION WITH ABS MODULE diagnostic procedure. Refer to BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX - 2500 HD & 3500 HD article .
No
- Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL . Refer to PCM/ECM REPROGRAMMING - GAS .
- Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
- With a scan tool check for ABS/ESP communication related DTCs in other modules on the CAN Bus.