22 · Diagnostics

Engine cuts out whilst driving

Make: Fiat
Model: Multipla Factory Service Manual
Year: 1998–2010
Section: Engine › Engine cuts out whilst driving

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Fault diagnosisEngine cuts out whilst driving

ENGINE CUTS OUT WHILST DRIVING

1.6 16v

When driving with the engine hot, it suddenly cuts out and then, a few moments later, starts normally.

1.6 16v · BIPOWER

The engine cuts out whilst driving (during METHANE operation); later on, after starting normally, it works again.

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Results of the tests
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
3	CHECK ON SOLENOID VALVE ON REDUCTION UNIT	All OK	Problems encountered	Operation

1.6 16v

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Preliminarily check: the engine wiring is properly connected to earth battery earth correctly fixed correct fixing of positive battery terminal and that all leads are connected ignition switch electrical connections ignition switch electrical connections correct fixing and connection to battery of maxifuse boxes	Continue to Step 1	Earth leads incorrectly fixed	Restore the battery earth lead Op. 5530B22
			Battery positive earth incorrectly fixed	Restore battery positive lead Op. 5530B26
			Maxifuse box fixings incorrect	Renew fixings or replace maxifuse box Op. 5505A16
1	INERTIA SWITCH CHECK	All OK	Problems met	Operation
	Check that the inertia switch is working properly the electrical connections for the inertia switch	Continue to Step 2	Fault detected with the inertia switch	Replace the inertia switch Op. 1040A74
		Continue to Step 2	Inertia switch connections faulty	Restore connection between inertia switch and fuel pump ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
2	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no faults in the engine management control unit the plausibility of all the parameters.	Continue to Step 3	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 3	Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
3	ROAD TEST WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Road test the vehicle keeping the diagnostic equipment (Examiner or other instruments) connected to the diagnostic socket. Check that there are no faults in the engine management control unit	Continue to Step 4	Error arises suddenly in the control unit	Renew the supply and earth connections for the engine management control unit ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
4	FUEL PRESSURE ROAD TEST	All OK	Problems met	Operation
	Road test the vehicle and check the fuel supply pressure Op. 0510C10	Continue to Step 5	Pressure not correct	Check the multi-purpose valve, in particular. If necessary, replace the valve Op. 1080E11
5	FUEL PUMP CONNECTIONS CHECK	All OK	Problems met	Operation
	Check the fuel pump electrical connections	Continue to Step 6	Fuel pump connections faulty	Renew the fuel pump connections ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
	Check the fuel pump electrical connections	Continue to Step 6	Fuel pump faulty	Replace the fuel pump assembly Op. 1056B70
6	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists

1.9 JTD 8V

When driving with the engine hot, it suddenly cuts out and then, a few moments later, starts normally.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check that there is fuel in the tank and whether the inertia switch has intervened Check the condition and the efficiency of the valve on the diesel filter mounting	Continue to Step 1	Dirt in the fuel tank or no fuel	Renew and, if necessary, clean the tank Op. 1040A10
		Continue to Step 1	Valve on diesel filter mounting faulty	Replace valve on diesel filter mounting Op. 1044B16
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check that there are no faults in the engine management control unit the plausibility of all the parameters.	Continue to Step 2	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 2	Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector ( See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT )
2	CHECK ON FUEL FILTER	All OK	Problems met	Operation
	Check the operation of the fuel filter	Continue to Step 3	Presence of water, petrol, paraffin or dirt detected	Clean the tank and pipes and replace the filter element Op. 1044B20
3	CHECK ON RETURN LOW PRESSURE	All OK	Problems met	Operation
	Check the pressure between the manifold and the return pipe to the tank See Test 1060A Check low pressure fuel circuit	Continue to Step 4	Pressure over 1bar: the return circuit to the tank is clogged	Eliminate any blockages in the return pipe or in the cage for the low pressure pump immersed in the tank
4	LOW SUPPLY PRESSUR CHECK	All OK	Problems met	Operation
	Check the pressure between diesel filter and high pressure pump See Test 1060B Check low pressure fuel circuit	Continue to Step 5	Leaks in circuit	Eliminate fuel leaks from low pressure circuit pipes/connectors
			Pressure less than 1.8 bar or difference in pressure between Test B and Test A less than 1 bar	Replace the fuel pump Op. 1040A70
			Pressure over 3.5 bar	Replace valve on diesel filter mounting Op. 1044B16
5	INJECTOR LEAKAGETEST	All OK	Problems met	Operation
	Check injectors for diesel leaks: See Test 1060C Check high pressure fuel circuit	Continue to Step 6	Leak detected from one or more injectors	Replace injector(s) Op. 1060F10
6	HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Check diesel pressure parameter measured using diagnostic instrument: See Test 1060D Check high pressure fuel circuit	Continue to Step 7	Pressure reading below 150 bar	Replace high pressure pump Op. 1060E10
		Continue to Step 7	Leaks in circuit	Eliminate fuel leaks from high pressure circuit pipes/connectors
7	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom

1.6 16v · GPOWER

When driving with the engine hot, it suddenly cuts out and then, a few moments later, starts normally.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check that the battery leads are correctly tightened Check that the battery earth lead and the earth leads on the cylinder block are correctly connected Possible obstruction in the catalyzer Injection system relays correctly fitted	Continue to Step 1	Earth leads slack	Restore correct tightening of leads See E1020 EARTHS
			Operation of inertia switch	Restore interia switch
			Catalyzer obstructed	Replace the catalyzer
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the petrol and LPG engine management control units: in errors ambient That there are no faults in the engine management control unit That there are no faults in the engine management control unit In parameters ambient Plausibility of all the parameters	Continue to Step 2	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
		Continue to Step 2	Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
2	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

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Parts & tools for this job For 1998 Fiat Multipla

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