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 THE DTC IS ACTIVE NOTE:
This DTC must be active for the results of this test to be valid.
- Perform any Technical Service Bulletins (TSBs) that may apply.
- Turn the ignition on.
- With the scan tool, record and erase the DTCs.
- Cycle the ignition switch from off to on.
- With the scan tool, read the DTCs.
Is the DTC active at this time?
Yes
- Go To 2
No
- Perform the ITBM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- CHECK POWERTRAIN CONTROL MODULE (PCM) CAN BUS DTCS ARE PRESENT
- With the scan tool, read the PCM DTCs.
Are there any PCM CAN BUS DTCs present?
Yes
- Perform the appropriate diagnostic procedures. Refer to the appropriate Testing & Diagnostics article in Engine Performance.
- Perform the ITBM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Go To 3
- With the scan tool, read the PCM DTCs.
- CHECK BODY CONTROL MODULE (BCM) CAN BUS DTCS ARE PRESENT
- With the scan tool, read the BCM DTCs.
Are there any BCM CAN BUS DTCs present?
Yes
- Perform the appropriate diagnostic procedures. Refer to DIAGNOSIS AND TESTING .
- Perform the ITBM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Using the schematics as a guide, check the Integrated Trailer Brake Module (ITBM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Integrated Trailer Brake Module (ITBM) in accordance with Service Information. Refer to MODULE, INTEGRATED TRAILER BRAKE (ITBM), REMOVAL .
- Perform the ITBM VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, read the BCM DTCs.