U1403-IMPLAUSIBLE FUEL VOLUME SIGNAL RECEIVED

For a complete wiring diagram Refer to Section 8W.

When Monitored:
Ignition on.
Set Condition:
The fuel volume message the PCM is receiving is implausible. The circuit is continuously monitored. One Trip fault.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Theory of Operation

The Front Control Module isn't receiving a fuel volume signal over CAN B from the Cluster Module. The FCM has to send the PCM a fuel volume signal over CAN C. The signal the FCM sends over CAN C is implausible.

Diagnostic Test

1. ACTIVE DTC

Ignition on, engine not running.
With a scan tool, View DTCs.

Is the DTC Active at this time?

Yes

Go To 2

Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

2. CAN B BUS HARDWARE DTCS ALSO ACTIVE

With a scan tool check for DTCs in the FCM.

Are any CAN B Hardware related DTCs active at this time?

Yes

(Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - DIAGNOSIS AND TESTING) for the appropriate diagnostic procedures.

Replace and program the Powertrain Control Module per Service Information.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)