U1403-IMPLAUSIBLE FUEL VOLUME SIGNAL RECEIVED





For a complete wiring diagram Refer to Section 8W.



Possible Causes
CAN CIRCUIT OPEN OR SHORTED
TOTALLY INTEGRATED POWER MODULE
PCM


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

Theory of Operation


The Totally Integrated Power Module isn't receiving a fuel volume signal from the Fuel Level Sensor. The PCM received the Fuel Level signal from the TIPM over the CAN C Bus circuit. The signal the TIPM is sending over CAN C is implausible.



Diagnostic Test

1. ACTIVE DTC

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

Is the DTC Active at this time?

Yes


No

2. CAN C HARDWARE DTCS ALSO ACTIVE

With a scan tool check for DTCs in the TIPM.

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

Yes


No