U0402

U0402-IMPLAUSIBLE DATA RECEIVED FROM TCM

For a complete wiring diagram Refer to Diagrams/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 Transmission Control Module (TCM).








Diagnostic Test


1. CHECK IF BCM CAN BUS DTCS ARE PRESENT

With the scan tool, read BCM DTCs.

Are there any BCM CAN BUS DTCs present?

Yes

- Diagnose the appropriate symptom.
- Perform ABS VERIFICATION TEST. ABS Verification Test

No

- Go To 2



2. CHECK IF TRANSMISSION DTCS ARE PRESENT

With the scan tool, read Transmission DTCs.

Are there any Transmission DTCs present?

Yes

- Diagnose the appropriate symptom.
- Perform ABS VERIFICATION TEST. 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 TEST. ABS Verification Test