51A3

procedure





51A3-IMPLAUSIBLE MINIMUM ENGINE TORQUE MESSAGE RECEIVED

For a complete wiring diagram Consult Diagrams/Electrical

Theory of Operation

The messages sent on the CAN bus are distinguished by an identifier (ID). Each CAN ID is defined to contain a certain number of bytes. The Anti-Lock Brake Module (ABM) verifies that it has received the proper number of bytes for each ID.

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

- Set Condition:
When the ABM detects an incorrect CAN ID from the ECM/PCM.





Diagnostic Test

1. CHECK FOR BCM CAN BUS DTCS
With the scan tool, read BCM DTCs.
Are there any BCM CAN BUS DTCs present?

Yes

- Diagnose and repair the DTC(s).
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Go To 2

2. CHECK IF ENGINE DTC'S ARE PRESENT
With the scan tool, read engine DTCs.
Are there any engine DTCs present?

Yes

- Diagnose and repair the DTC(s).
- Perform ABS VERIFICATION TEST. Verification Tests.

No

- Replace the Anti-Lock Brake Module.
- Perform ABS VERIFICATION TEST. Verification Tests.