1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner to the diagnostic socket. Check that there are no faults in the Body Computer	Move on to Step 2	Sensor with interrupted circuit, sensor short circuited, value implausible/not consistent with actual fuel level	Continue as instructed by the diagnostic equipment
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the Examiner equipment connected to the diagnostic socket, check the operation of the fuel reserve warning light in active diagnosis	Move on to Step 3	The warning light does not come on	Replace the instrument panel Op. 5560B10 CONTROL PANEL - R+R
3	FUEL LEVEL SENSOR CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fuel level sensor is working properly	Move on to Step 4	Sensor not working	Replace the fuel level gauge Op. 1040A66 FUEL LEVEL GAUGE FOR SUBMERGED PUMP ASSEMBLY - REPLACE.
4	ELECTRICAL CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the continuity/insulation of the cable between the fuel level sensor and the Body Computer See E4010 INSTRUMENT PANEL	Move on to Step 5	Cables interrupted/not insulated	Restore cable continuity/insulation.
5	CORRECT OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	The fault persists	Replace the Body Computer Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.

With the ignition ON, the fuel reserve warning light does not come on when the tank is at the reserve level

The fuel level message is supplied by the "body computer node" and is made available to the "instrument panel node" via the B-CAN.

The "Body Computer node" also sends the fuel level sensor error message