U110C

U110C-LOST FUEL LEVEL MESSAGE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Fuel Level Sensor signal is a direct input to the Body Control Module (BCM). The BCM transmits the fuel level message to the Powertrain Control Module (PCM) over the CAN C bus.

- When Monitored:
With the ignition on, the battery voltage between 9.0 and 16.0 volts and engine run time greater than three seconds.

- Set Condition:
The Powertrain Control Module (PCM) either doesn't receive a bus message or receives an implausible bus message from the Body Control Module (BCM).





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

Diagnostic Test

1. ACTIVE DTC

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 PCM DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test.

2. U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE (BCM) ALSO ACTIVE
1. With the scan tool, select View DTCs.

Is the U0140-LOST COMMUNICATION WITH BODY CONTROL MODULE (BCM) also set?

Yes

- Perform the U0140-Lost Communication with Body Control Module (BCM) diagnostic procedure. U0140.

No

- Replace and program the Powertrain Control Module (PCM). Powertrain Control Module - Removal.
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.