Engine cuts out whilst running (then restarts)

Make: Fiat
Model: Grande Punto Factory Service Manual
Year: 2005–2012
Section: Engine › Engine cuts out whilst running (then restarts)

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Fault diagnosisEngine cuts out whilst running (then restarts)

ENGINE CUTS OUT WHILST RUNNING (THEN RESTARTS)

1.9 Multijet

The customer complains of: The engine cuts out whilst it is running, it can be restarted

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	Check that the engine oil level is correct Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY Check that the air intake/vacuum circuit is working properly by carrying out the See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK Check the condition of the fuel supply circuit and make sure that it is working properly See Test 1040OA FUEL SUPPLY CIRCUIT CHECK Also check . wiring on engine correctly fastened to earth; . battery correctly fastened to earth; . positive battery pole and all leads connected to it correctly fastened	Move on to Step 1	Oil level incorrect	Restore the correct engine oil level Op. 0010T11 ENGINE OIL - CHECK LEVEL AND TOP UP, IF NECESSARY
			Supply fastenings slack or oxidized	Restore correct fastenings See E1010 POWER SUPPLY
			Earth fastenings slack or oxidized	Restore correct fastenings See E1010 POWER SUPPLY
1	AMBIENT PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: Diesel electronic injection control unit EDC16C39 CF4/EOBD CAN (EP engine 1.9) Check the value of the following parameters: . Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK . Engine rpm See Test 1060GI CHECK ENGINE SPEED	Move on to Step 2
2	ELECTRICAL EQUIPMENT CHECK	All OK	Problems encountered	Operation
	Check that fuse F59 has not blown (second from the left on the second row from the bottom)	Move on to Step 3	Fuse F59 has blown	Restore the connections or, if necessary, replace the junction unit in the engine compartment Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.
3	DIESEL PREHEATING RELAY CHECK	All OK	Problems encountered	Operation
	Check the diesel preheating relay circuit See Test 5505AC	Move on to Step 4
4	INJECTOR HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another. See Test 1060OC INJECTOR SEAL TEST	Move on to Step 5	Significant leak from one injector	Replace the injector Op. 1060F10 FUEL INJECTORS - R.R.
5	HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the diesel pressure parameter is correct. See Test 1060OD HIGH PRESSURE FUEL CIRCUIT CHECK	Move on to Step 13	Pressure not correct	Move on to Step 6
6	LOW RETURN PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the pressure in the return pipe to the tank is less than 1 bar. See Test 1060OA LOW FUEL RETURN PRESSURE CIRCUIT CHECK	Move on to Step 7	Pressure above the maximum limit: return pipe to the tank obstructed	Repair the pipe, if necessary, replace it
7	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the diesel pressure between the filter and the pressure pump is between 2 and 3 bar See Test 1060OB LOW FUEL DELIVERY PRESSURE CIRCUIT CHECK	Move on to Step 12	Pressure below the minimum limit or above the maximum limit	Move on to Step 8
8	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the difference in pressure upstream and downstream of the filter is less than 1 bar	Move on to Step 9	Difference in pressure more than 1 bar	Replace the fuel filter cartridge Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE
9	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the supply pump pressure at the filter inlet is more than 2.2 bar	Move on to Step 12	Pressure below 2.2 bar	Move on to Step 10
10	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Measure the difference in pressure between the electric pump outlet and the filter inlet and check that it is less than 0.3 bar	Move on to Step 11	Difference in pressure more than 0.3 bar	Replace the pipe
11	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE that the pump supply voltage is equal to 12V and that the current uptake is between 2 and 10 A	Move on to Step 12	Voltage lower than 12 V	Renew electrical wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
			Current greater than 10 A: pump defective	Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
			Current less than 2 A: pump obstructed	Replace the fuel pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R and clean the fuel tank
12	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Replace the DRV high pressure regulating valve Op. 1060E50 and check that the fault is no longer present.	End of diagnosis	Fault persists	Move on to Step 13
13	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R and check that the fault is no longer present	End of diagnosis	Fault persists	Contact technical service for further information on the problem

1.3 Multijet

The customer complains of: The engine cuts out whilst it is running, it can be restarted

1	AMBIENT PARAMETERS CHECK	All OK	Problems encountered	Operation
		Test results
	Select the following control unit at the diagnostic equipment: Marelli Diesel Injection 6F3 EOBD CAN (EP engine 1.3 JTD). Check the value of the following parameters: - Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK	Move on to Step 2
2	CHECK FUEL SYSTEM	All OK	Problems encountered	Operation
	Check that the air intake/vacuum circuit is working properly See Test 1048OA AIR INTAKE/VACUUM CIRCUIT CHECK Check the condition of the fuel supply circuit and make sure that it is working properly See Test 1040OA FUEL SUPPLY CIRCUIT CHECK Also check - wiring on engine correctly fastened to earth; - battery correctly fastened to earth; - positive battery terminal and all leads connected to it correctly fastened	Move on to Step 3	1. Supply fastenings slack or oxidized 2. Earth fastenings slack or oxidized	1. Restore correct fastenings See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT 2. Restore correct fastenings See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
3	AMBIENT PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: Marelli Diesel Injection 6F3 EOBD CAN (EP engine 1.3 JTD). Check the value of the following parameters: - Engine rpm See Test 1060GA RPM SENSOR EFFICIENCY CHECK - Target Diesel pressure See Test 1060GH DIESEL PRESSURE CHECK - Measured Diesel pressure - Pressure regulator opening (MPROP) See Test 1060GR CHECK OPERATION OF FUEL PRESSURE SENSOR ON RAIL - Brake pedal status See Test 5550DA BRAKE PEDAL SWITCH OPERATION CHECK - Clutch pedal See Test 1060GL CHECK OPERATION OF MAIN ENGINE CONTROL UNIT RELAY - Vehicle speed See Test 3340AB SPEED SIGNAL CHECK	End of diagnosis

1.2 8v, 1.4 8v

The engine cuts out unexpectedly whilst driving. It works later on after starting normally.

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	First, check: - correct earth fastening on engine; - correct battery earth fastening See E1020 EARTHS - positive battery pole and all leads connected to it correctly fastened See E1010 POWER SUPPLY - no water in the fuel	Move on to Step 1	Earth leads fastening not correct	Restore or, if necessary, replace the battery earth lead Op. 5530B22 BATTERY EARTH LEAD - R+R
			Positive battery lead fastenings not correct	Restore the positive battery lead
			Water in the fuel	Replace the fuel
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic test equipment (Examiner or other instruments) to the tester input. Check: - that there are no faults in the engine management control unit; - the plausibility of all the parameters	Move on to Step 2	Error detected in the control unit	Proceed as instructed by the diagnostic tester
		Move on to Step 2	Parameter not consistent	Proceed as instructed by the diagnostic tester
2	ROAD TEST USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Carry out a road test by reproducing the conditions in which the fault occurs, keeping the tester connected. Check: - that there are no faults in the engine management control unit; - the plausibility of all the parameters	Move on to Step 3	The sudden onset of an error in the control unit is detected	Proceed as instructed by the diagnostic tester
			Parameter not consistent	Proceed as instructed by the diagnostic tester
			Loss of dialogue between the control unit and the diagnostic equipment	Restore the control unit circuit supply See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
3	FUEL PRESSURE ROAD TEST	All OK	Problems encountered	Operation
	Carry out a road test and check the fuel supply pressure Op. 0510C10 FUEL SYSTEM - CHECK DELIVERY PRESSURE Make sure that the conditions in which the problem occurs are reproduced	Move on to Step 4	Pressure not correct: obstructions in the pipe	Remove the obstructions in the fuel pipe, replace it if necessary
		Move on to Step 4	Pressure not correct: petrol pump damaged	Replace the petrol pump assembly Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
4	CHECK ON CORRECT OPERATION	All OK	Problems encountered	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit defective	Replace the control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

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Parts & tools for this job For 2005 Fiat Grande Punto

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