U0431-IMPLAUSIBLE DATA RECEIVED FROM FCM

For a complete wiring diagram Refer to Section 8W

When Monitored:
Continuously while the system is active.
Set Condition:
Implausible data has been received over the bus from the Front Control Module (FCM).

Possible Causes

INTERMITTENT DTC

CAN BUS OPEN OR SHORTED CONDITION

FRONT CONTROL MODULE (FCM)

POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

1.ACTIVE DTC

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

Is the status Active for this DTC?

Yes

Refer to the INTERMITTENT CONDITION Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.FCM COMMUNICATION RELATED DTC'S IN OTHER MODULES

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) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1. (Refer to 9 - ENGINE - STANDARD PROCEDURE)