323000789 - K021 FUEL RESERVE WARNING LIGHT NOT WORKING

With the ignition ON, the fuel reserve warning light does not come on when the tank is at the reserve levelThe fuel level message is provided by the Body Computer Node and made available to the Instrument Panel Node via the B-CAN. The "Body Computer Node" also sends the fuel level sensor error message

1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the Examiner diagnostic equipment to the diagnostic socket.Check that there are no faults in the Body Computer.	Move on to Step 2	Sensor with broken 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	Operation
	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	CHECK FUEL LEVEL SENSOR	All OK	Problems encountered	Operation
	Check fuel level sensor operation    See E4010 INSTRUMENT PANEL	Move on to Step 4	Sensor not working	Replace the fuel pump assembly    Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4	ELECTRICAL CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the continuity/insulation of the lead between fuel level sensor and Body Computer    See E4010 INSTRUMENT PANEL	Move on to Step 5	Cables broken/not insulated.	Restore cable continuity/insulation    See E4010 INSTRUMENT PANEL
5	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present.	End of diagnosis.	The fault persists.	Replace Body Computer    Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R.