Diagnostic Test
WARNING: This page is about a different car, the 2011 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- VERIFY DTC IS ACTIVE NOTE:
Verify the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
NOTE:If present, diagnose and repair DTC U0002-CAN C BUS OFF PERFORMANCE, DTC U0146-LOST COMMUNICATION WITH CENTRAL GATEWAY, or DTC U1502-IMPLAUSIBLE MESSAGE DATA LENGTH RECEIVED FROM FCM / BCM before diagnosing this DTC.
- Ignition on, engine not running.
- With the scan tool, read and record ABS DTCs.
- With the scan tool, read and record Environmental Data (EV Data).
- With the scan tool, erase ABS DTCs.
- Cycle the ignition switch.
- With the scan tool, read ABS DTCs.
Does this DTC reset?
Yes
- Go To 2.
No
- Perform the Stored Lost Communication test procedure. Refer to STORED LOST COMMUNICATION DTCS .
- Perform BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs
- With the scan tool, read all active DTCs from all CAN C Bus modules.NOTE:
Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.
Does the scan tool display any active DTCs related to the conditions listed above?
Yes
- Diagnose and repair the DTCs.
No
- Go To 3.
- With the scan tool, read all active DTCs from all CAN C Bus modules.
- VERIFY THAT THE TCM IS ACTIVE ON THE BUS
- With the scan tool, select ECU View.
- Verify that the TCM is active on the bus.
Is the TCM active on the bus?
Yes
- Go To 4.
No
- Perform the Stored Lost Communication test procedure. Refer to STORED LOST COMMUNICATION DTCS .
- Perform BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
- CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs
- With the scan tool, select Network View and select Advanced.
Is there more than one module with active DTCs "Logged Against" the TCM?
Yes
- Replace/update the Transmission Control Module (TCM) in accordance with the service information.
- Perform TCM VERIFICATION TEST. Refer to appropriate TCM Verification Test .
No
- Replace the Anti-Lock Brakes System (ABS) Module in accordance with the service information.
- Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- With the scan tool, select Network View and select Advanced.