Antilock Brake Module (ABS)

U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM



- When Monitored:
Continuously with the ignition on, one valid CAN message received at least once, and no U0002-CAN C Bus Off Performance DTC present.

- Set Condition:
When the Anti-Lock Brake Module detects an incorrect CAN message from the Engine Control Module (ECM).





1. 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.

1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Cycle the ignition switch from off to on.
4. 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. Initial Inspection and Diagnostic Overview.

2. CHECK IF TIPM CAN BUS DTCS ARE PRESENT
1. With the scan tool, read FCM DTCs.

Are there any TIPM CAN BUS DTCs present?

Yes

- Perform the appropriate diagnostic procedures. Testing and Inspection
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 3

3. CHECK IF ENGINE DTCS ARE PRESENT
1. With the scan tool, read Engine DTCs.

Are there any Engine DTCs present?

Yes

- Perform the appropriate diagnostic procedures. Testing and Inspection

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.
- Perform ABS VERIFICATION TEST. ABS Verification Test