Diagnostic Test
- 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 TEST. Refer to STANDARD PROCEDURE .
- CHECK IF TIPM CAN BUS DTCs.ARE PRESENT
- With the scan tool, read TIPM DTCs.
Are there any TIPM CAN BUS DTCs.present?
Yes
- Refer to the appropriate diagnostic. Refer to DIAGNOSIS AND TESTING .
No
- Go To 3
- With the scan tool, read TIPM DTCs.
- CHECK IF ENGINE DTCs.ARE PRESENT
- With the scan tool, read Engine DTCs.
Are there any Engine DTCs.present?
Yes
- Diagnose the appropriate symptom. Refer to the DTC INDEX article .
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 in accordance with the Service Information.
- Perform ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- With the scan tool, read Engine DTCs.