U1403

U1403-IMPLAUSIBLE FUEL VOLUME SIGNAL RECEIVED





For complete wiring diagrams refer to Diagrams/Electrical.

- 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.

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

- Go To 2

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

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

- Refer to Testing.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace and program the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test