EBC 340/445ESP AWAL

U0401-IMPLAUSIBLE DATA RECEIVED FROM ECM/PCM

For a complete wiring diagram, Refer to Diagram/Electrical.Electrical Diagrams

- 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).





Diagnostic Test

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.

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.
- Perform ABS Intermittent Condition Test .

Diagnostic Test

2. 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.
- Perform ABS Verification ABS Verification Test

No

- Go To 3

3. CHECK IF ENGINE DTCs ARE PRESENT

With the scan tool, read Engine DTCs.

Are there any Engine DTCs present?

Yes

- Refer to Symptom Related Diagnostic Procedures and diagnose the appropriate symptom.
- Perform ABS Verification ABS Verification Test

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 ABS Verification Test