Workshop Manuals Factory service & repair

Fiat Panda Factory Service Manual (2003-2012)23 · Fault diagnosis

23 · Diagnostics

Lean fuel system

Make: Fiat
Model: Panda Factory Service Manual
Year: 2003–2012
Section: Examiner › Lean fuel system

‹ Prev Rich fuel system Next › Misfire error

Fault diagnosisLean fuel system

LEAN FUEL SYSTEM

1.1, 1.2 8v

1	INTAKE AND EXHAUST SYSTEM LEAKAGE CHECK	All OK	Problems met	Operation
		Results of the tests
	Check the intake and exhaust system visually and by listening, to check that there are no leaks downstream of the MAP sensor/flow meter. Also take into account: blow-by circuit; canister circuit, checking that the valve is not stuck open; brake servo vacuum pipes; Injector O-Rings	Continue to Step 2	There are leaks	Eliminate leaks from the system. Replace faulty parts if necessary Continue to Step 5
2	PETROL PRESSURE CHECK	All OK	Problems met	Operation
	Turn the key to MAR and check that fuel pump activates. Whilst the pump is activated, check that the fuel pressure is not too low	Continue to Step 3	Low pressure: fuel filter blocked/obstructed	Replace the fuel pupm Op. 1040A70 Continue to Step 5
			Low pressure: supply pipe restrictions/leaks	Renew or, if necessary, replace the pipes involved
			Low pressure: pressure regulator defective	Replace the fuel pupm Op. 1040A70 Continue to Step 5
			Low pressure: pressure regulator incorrectly calibrated	Replace the fuel pupm Op. 1040A70 Continue to Step 5
			Low pressure: electrical problem in the fuel pump	Restore correct connections. If necessary, replace the fuel pump See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT Continue to Step 5
			Low pressure: excess pressure valve stuck open	Replace the fuel pupm Op. 1040A70 Continue to Step 5
3	FUEL QUALITY CHECK	All OK	Problems met	Operation
	Check that there is no water or other substances in the tank which is contaminating the fuel.	Continue to Step 4	Impurities present	Clean the tank and introduce new fuel. Op. 1040A24 Continue to Step 5
4	UPSTREAM LAMBDA SENSOR CHECK	All OK	Problems met	Operation
	Starting from Step 3	See table Z56
5	ERROR CANCELLING AND CHECKING	All OK	Problems met	Operation
	Use a tester to cancel the errors in the control unit. Road test the vehicle and check that the error does not occur again	Continue to Step 6	The fault persists	Continue to Step 0
6	Continue as instructed by the tester	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

‹ Prev Rich fuel system Next › Misfire error

Parts & tools for this job Staging For 2003 Fiat Panda

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