Fuel reserve warning light on (with higher level)

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Instrument panel › Fuel reserve warning light on (with higher level)

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Fault diagnosisFuel reserve warning light on (with higher level)

FUEL RESERVE WARNING LIGHT ON (WITH HIGHER LEVEL)

The Engine Control Node sends a message via the C-CAN network to the Body Computer, which makes it available via the B-CAN network, to the Instrument Panel node.

Faults in the C-CAN network will turn on the warning lights of the control units that communicate on this network. Verification of the CAN Network Information is intended to detect this situation

0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fuel level gauge reading is not on reserve	Move on to Step 1	Fuel level gauge on reserve	Top up the fuel to the correct level.
1	CHECKS USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic instrument and check CAN Network information for the absence of: Inactive node/s Node/s with error/s Node/s with CAN network error/s	Move on to Step 6	1. Impossible to communicate with the Body Computer	1. Move on to Step 3
			2. Instrument Panel Node inactive and/or with error	2. Move on to Step 5
			3. Fault on CAN network	3. Move on to Step 10
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Use an Examiner to asses the possibility of connection to the Body Computer Node, the lack of errors and the presence of parameters.	Move on to Step 3	1. Impossible to connect to the Body Computer control unit.	1. Move on to Step 3
		Move on to Step 3	2. Presence of errors	2. Continue as described by the diagnostic equipment
3	ELECTRICAL POWER SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the power supply to the Body Compute Node and the wiring between the nodes are correct. Check in particular that each individual pin is correctly connected.	Move on to Step 4	1. Fault in positive electrical supply and/or earth	1. Replace defective component (in the case of a fuse, find out what caused it to blow).
		Move on to Step 4	2. Electrical connections not operational	2. Restore the damaged wiring to correct operation.
4	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Use an Examiner to check the possibility of connection to the Body Computer Node	Move on to Step 5	Impossible to connect to the Body Computer.	Replace Body Computer Op. 5505A32 BODY COMPUTER - R.R
5	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using an Examiner check, in Instrument Panel mode, that there are no errors and that the parameters are present.	Move on to Step 8	1. System fault	1. Move on to Step 6
			2. Fault on CAN network	2. Move on to Step 8
			3. Presence of errors.	3. Continue as described by the diagnostic equipment
6	ELECTRICAL POWER SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the electricity supply to the node is correct. Check the wiring between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected.	Move on to Step 7	1. Fault in positive electrical supply and/or earth	1. Replace defective component (in the case of a fuse, find out what caused it to blow).
		Move on to Step 7	2. Electrical connections not operational	2. Restore the damaged wiring to correct operation.
7	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using an Examiner check, in Instrument Panel mode, that there are no errors and that the parameters are present.	Move on to Step 8	Fault persists	Replace the Auxiliary Instrument Panel Op. 5560C51 COMBINED ANALOGUE CONTROL PANEL - R+R OR REPLACE
8	ACTIVE DIAGNOSIS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner in Instrument Panel Node mode, check that the reserve warning light is correctly activated in Active Diagnosis.	Move on to Step 9	The reserve warning light does not flash	Replace the Auxiliary Instrument Panel Op. 5560C51 COMBINED ANALOGUE CONTROL PANEL - R+R OR REPLACE
9	FUEL LEVEL GAUGE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the fuel level gauge is working properly by carrying out the Test See Test 1040AC FUEL LEVEL GAUGE CHECK	Move on to Step 10	Level gauge defective	Change the level gauge Op. 1040A66 FUEL LEVEL GAUGE FOR SUBMERGED PUMP ASSEMBLY - REPLACE.
10	ELECTRICAL POWER SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the node power supply/electrical connection/s are correct. Check the wiring (network) between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected on each node.	Move on to Step 11	1. Fault in positive electrical supply and/or earth	1. Replace defective component (in the case of a fuse, find out what caused it to blow).
		Move on to Step 11	2. Electrical connections not operational	2. Restore the damaged wiring to correct operation.
11	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 2005 Alfa Romeo 159

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