Fuel Warning Light Does Not Work

With the ignition key on, the fuel reserve warning light does not come on when the tank enters the reserve level.

NOTE:

The message comes from the fuel level signal to the Body Control Module (BCM) and made available to the Instrument Panel Cluster (IPC) through the CAN-B network.

The BCM also sends a fuel level sensor error message.

1	CHECK WITH DIAGNOSTIC TOOL	Result OK	Result Not OK	Action
	Connect the diagnostic scan tool to the DLC. Verify the absence of anomalies in the BCM.	Continue to Step 2	Sensor with open circuit, sensor DC, value incongruent / implausible with actual fuel level	Proceed as indicated by the diagnostic tool
2	CHECK WITH DIAGNOSTIC TOOL	Result OK	Result Not OK	Action
	With the diagnostic scan tool, test the functionality of the fuel reserve light through active diagnosis.	Continue to Step 3	The light does not come on.	Replace instrument panel cluster
3	CHECK FUEL LEVEL SENSOR	Result OK	Result Not OK	Action
	Check the operation of the fuel level sensor	Continue to Step 4	Sensor not working.	Replace the fuel pump assembly
4	CHECK ELECTRICAL CIRCUIT	Result OK	Result Not OK	Action
	Check continuity / insulation of the circuits between the fuel level sensor and BCM.	Continue to Step 5	Circuit fault / not insulated.	Restore circuit continuity / insulation
5	CHECK PROPER OPERATION	Result OK	Result Not OK	Action
	Verify that the fault is no longer present	Diagnostic complete	Anomaly persists	Replace the Body Control Module