U0431

U0431-IMPLAUSIBLE DATA RECEIVED FROM FCM





For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
Continuously while the system is active.

- Set Condition:
Implausible data has been received over the bus from the Front Control Module (FCM).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.Initial Inspection and Diagnostic Overview

Diagnostic Test

1. ACTIVE DTC
NOTE: Diagnose all CAN B and C communication DTCs before continuing.

Turn the ignition on.
With a scan tool, view DTCs.
Is the status Active for this DTC?

Yes

- Go to 2

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure.Checking For An Intermittent DTC


2. FCM COMMUNICATION RELATED DTC'S IN OTHER MODULES
With a scan tool check for FCM communication related DTCs in other modules on the CAN Bus.
Are there any FCM communication related DTCs in other modules on the CAN Bus at this time?

Yes

- Replace and program the Front Control Module (FCM).
- Perform the PCM Verification Test Ver. 1.Powertrain Verification Test

No

- Replace and program the Powertrain Control Module (PCM).
- Perform the PCM Verification Test Ver. 1.Powertrain Verification Test