Engine cuts out whilst running (then does not restart)

Make: Fiat
Model: Bravo Factory Service Manual
Year: 2007–2014
Section: Engine › Engine cuts out whilst running (then does not restart)

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Fault diagnosisEngine cuts out whilst running (then does not restart)

ENGINE CUTS OUT WHILST RUNNING (THEN DOES NOT RESTART)

1.4 16v

The engine cuts out while in gear, and it is impossible to restart it

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Check the following, in order: - presence of fuel in the tank; - engine control unit correctly fastened to earth; - battery correctly fastened to earth; - positive battery terminal and all leads connected to it correctly fastened - no impurities/water in the fuel tank - no obstructions in the air intake circuit	Move on to Step 1	No fuel	Add fuel to the tank
			Fastening slack or oxidized	Restore correct fastenings
			Presence of dirt in the fuel tank	Add fuel to the tank
			Circuit obstructed	Clean the tank and pipes and replace the filter element
				Restore to correct operation.
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check: - that there are no errors in the control unit; - parameter plausibility	Move on to Step 2	Error detected in the control unit.	Continue following the instructions on the diagnostic equipment
		Move on to Step 2	Impossible to activate a dialogue with the control unit	Move on to Step 2
2	CONTROL UNIT POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	- Check that the engine control unit is receiving the correct power supply - Check the continuity of the power supply wiring - Check the continuity of the engine compartment control unit fuses See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 3	Main relay defective	Replace the relay
			Control unit power supply wiring defective	Restore wiring
			Power supply fuses blown	Replace the blown fuses after having ascertained the cause of the problem
3	ROAD TEST USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected, and check: - that there are no errors in the control unit; - parameter plausibility	Move on to Step 4	The sudden onset of errors in the control unit is detected	Continue following the instructions on the diagnostic equipment
			Parameters off the scale.	Continue following the instructions on the diagnostic equipment
			Loss of dialogue between the control unit and the diagnostic equipment.	Restore the correct connections.
4	IGNITION SYSTEM CHECK	All OK	Problems encountered	Operation
	- Check the continuity of the power supply wiring - Check that the ignition coils are working, by carrying out the See Test 5510CI IGNITION COIL OPERATION CHECK	Move on to Step 5	Power supply wiring to coils broken	Restore wiring
		Move on to Step 5	Defective coils.	Replace coils Op. 5510C14 IGNITION COIL/S - R.R.
5	INJECTION SYSTEM CHECK	All OK	Problems encountered	Operation
	- Check the continuity of the power supply wiring See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 6	Power supply wiring to injectors broken	Restore wiring
6	FUEL PRESSURE CHECK	All OK	Problems encountered	Operation
	Carry out a road test and check the fuel supply pressure in the conditions in which the problem occurs. Check that the fuel lines are not blocked Check that the fuel pump is working properly by carrying out the See Test 1040AB SUBMERGED FUEL PUMP CHECK Check that the fuel filter is not blocked.	Move on to Step 7	Fuel pressure too low: pipes obstructed	Eliminate the constrictions, replace the pipes if necessary
			Fuel pressure too low: pump defective.	Replace the fuel pump assembly Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
			Fuel filter blocked.	Replace the fuel filter.
7	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the engine control unit is working properly.	End of diagnosis	Engine management control unit defective.	Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

1.9 JTD 8v, 1.9 JTD 16v

The customer complains that: The engine cuts out whilst idling; it is impossible to restart it

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, carrying out the See Test 1040OA Fuel supply circuit check Also check: 1. wiring on engine correctly fastened to earth; 2. battery correctly fastened to earth; 3. positive battery terminal 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	MODE PARAMETERS CHECK	All OK	Problems encountered	Operation
	Select the following control unit at the diagnostic equipment: EDC16C39 Diesel electronic injection control unit. Check the value of the following parameters: · Battery voltage See Test 5530BB BATTERY VOLTAGE CHECK · Engine rpm · Target Diesel pressure · Measured Diesel pressure See Test 1060GH DIESEL PRESSURE CHECK	Move on to Step 2
2	PARTICULATE FILTRATION SYSTEM CHECKS	All OK	Problems encountered	Operation
	Check that the DPF system is working properly, carrying out the See Test 1080BE PARTICLE FILTER SATURATION CHECK	Move on to Step 3
3	INJECTOR HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1060OC INJECTOR SEAL TEST that the diesel leaks from the injector recirculation connections are small (seepage) and roughly equal to one another.	Move on to Step 9	Significant leak from one injector	Replace the injector Op. 1060F10 FUEL INJECTORS - R.R.
4	HIGH PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1060OD Injector high pressure fuel circuit check that the diesel pressure parameter is correct.	Move on to Step 11	Pressure not correct	Move on to Step 5
5	LOW RETURN PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1060OA Low pressure fuel return circuit check that the pressure in the return pipe to the tank is less than 1 bar	Move on to Step 6	Pressure above the maximum limit: return pipe to the tank obstructed	Repair the pipe; if necessary, replace it
6	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the See Test 1060OB Low pressure fuel supply circuit check that the diesel pressure between the filter and the pressure pump is between 3.5 and 5 bar	Move on to Step 10	Pressure below the minimum limit or above the maximum limit	Move on to Step 10
7	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check using the See T CHECK ON CHANGE IN PRESSURE AT THE FUEL FILTER that the difference in pressure upstream and downstream of the filter is less than 1 bar	Move on to Step 8	Difference in pressure more than 1 bar	Replace the fuel filter Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE
8	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check that the supply pump pressure at the filter inlet is between 3.5 and 5 bar	Move on to Step 9	Pressure below 3.5 bar	Move on to Step 10
9	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	Pressure above 0.3 bar	Replace the pipe
10	LOW SUPPLY PRESSURE CHECK	All OK	Problems encountered	Operation
	Check as described in the 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 11	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	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Replace the engine management control unit and check that the fault is no longer present Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R	End of diagnosis	Fault persists	Contact technical service for further information on the problem

1.4 16v TJet

The engine cuts out while in gear, and it is impossible to restart it

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	Check the following, in order: - presence of fuel in the tank; - engine control unit correctly fastened to earth; - battery correctly fastened to earth; - positive battery terminal and all leads connected to it correctly fastened - that there are no impurities/water in the fuel tank - no obstructions in the air intake circuit	Move on to Step 1	No fuel	Add fuel to the tank
			Fastening slack or oxidized	Restore correct fastenings
			Presence of dirt in the fuel tank	Add fuel to the tank
			Circuit obstructed	Clean the tank and pipes and replace the filter element
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check: - that there are no errors in the control unit; - parameter plausibility	Move on to Step 2	Error detected in the control unit	Continue following the instructions on the diagnostic equipment
		Move on to Step 2	Impossible to activate a dialogue with the control unit	Move on to Step 2
2	CONTROL UNIT POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Check that the engine control unit is receiving the correct power supply Check the continuity of the supply wiring Check the continuity of the engine compartment control unit fuses	Move on to Step 3	Main relay defective	Replace the relay
			Control unit power supply wiring defective	Restore correct wiring.
			Power supply fuses blown	Replace the blown fuses after having ascertained the cause of the malfunction.
3	ROAD TEST USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Carry out a road test reproducing the conditions in which the fault occurs, keeping the diagnostic equipment connected and check: - that there are no errors in the control unit; - parameter plausibility	Move on to Step 4	The sudden onset of errors in the control unit is detected	Continue following the instructions on the diagnostic equipment
			Parameters off the scale.	Continue following the instructions on the diagnostic equipment
			Loss of dialogue between the control unit and the diagnostic equipment.	Restore the correct connections.
4	IGNITION SYSTEM CHECK	All OK	Problems encountered	Operation
	Check the continuity of the supply wiring Check that the ignition coils are working by carrying out the See Test 5510CI IGNITION COIL OPERATION CHECK	Move on to Step 5	Power supply wiring to coils broken	Restore correct wiring.
		Move on to Step 5	Defective coils.	Replace coils Op. 5510C14 IGNITION COIL/S - R.R.
5	INJECTION SYSTEM CHECK	All OK	Problems encountered	Operation
	Check the continuity of the supply wiring See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 6	Injector supply wiring broken	Restore correct wiring.
6	FUEL PRESSURE CHECK	All OK	Problems encountered	Operation
	Carry out a road test and check the fuel supply pressure in the conditions in which the problem occurs. Check that the fuel lines are not blocked by carrying out the See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK Check that the fuel pump is working properly by carrying out the See Test 1040AA CHECK ON SUPPLY VOLTAGE AND CURRENT UPTAKE	Move on to Step 7	Fuel pressure too low: pipes obstructed	Eliminate the constrictions, replace the pipes if necessary
		Move on to Step 7	Fuel pressure too low: pump defective.	Replace the fuel pump assembly Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
7	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the engine control unit is working properly.	End of diagnosis	Engine management control unit defective.	Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

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