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.
- CHECK FOR DTC U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM NOTE:
This DTC must be active for the results of this test to be valid.
- Turn the ignition on.
- With the scan tool, record and erase DTCs.
- Cycle the ignition switch from off to on.
- With the scan tool, read DTCs.
Does the scan tool display: U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM?
Yes
- Go To 2.
No
- Perform the ABS INTERMITTENT CONDITION diagnostic procedure. Refer to ABS INTERMITTENT CONDITION .
- CHECK IF TIPM CAN BUS DTCS ARE PRESENT
- With the scan tool, read FCM DTCs.
Are there any TIPM CAN BUS DTCs present?
Yes
- Perform the appropriate diagnostic procedures. Refer to appropriate Electrical Diagnostic Information .
- Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
No
- Go To 3.
- With the scan tool, read FCM DTCs.
- CHECK IF ENGINE DTCS ARE PRESENT
- With the scan tool, read Engine DTCs.
Are there any Engine DTCs present?
Yes
- Perform the appropriate diagnostic procedures. Refer to appropriate Electrical Diagnostic Information .
No
- Using the schematics as a guide, check the Anti-Lock Brake Module 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 Anti-Lock Brake Module per the Service Information.
- Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
- With the scan tool, read Engine DTCs.