U1403-IMPLAUSIBLE FUEL LEVEL SIGNAL RECEIVED
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
The Totally Integrated Power Module (TIPM) 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.
-
When Monitored:
Ignition on.
-
Set Condition:
The fuel level message the PCM is receiving is implausible. The circuit is continuously monitored. One Trip fault.
Possible Causes |
|---|
| CAN CIRCUIT OPEN OR SHORTED |
| FUEL LEVEL SENSOR |
| (N4) FUEL LEVEL SIGNAL CIRCUIT OPEN |
| (N4) FUEL LEVEL SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT |
| (K900) SENSOR GROUND CIRCUIT OPEN |
| TOTALLY INTEGRATED POWER MODULE (TIPM) |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
| NOTE: | Diagnose all communication DTCs before continuing. |
| NOTE: | For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem. |
| 1. | Ignition on, engine not running. |
| 2. | With a scan tool, select View DTCs. |
Is the status Active for this DTC?
Yes
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
2. OTHER CAN BUS COMMUNICATION DTCS ALSO ACTIVE
| 1. | With a scan tool select View DTCs in the TIPM. |
Are any other CAN Bus DTCs active?
Yes
- (Refer to 28 - DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.
No
- (Refer to 29 - Non-DTC Diagnostics/Communication - Diagnosis and Testing) and perform the Stored Lost Communication DTCs diagnostic procedure.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).