Engine does not start (under any circumstances)

Make: Fiat
Model: Bravo Factory Service Manual
Year: 2007–2014
Section: Starting › Engine does not start (under any circumstances)

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Fault diagnosisEngine does not start (under any circumstances)

ENGINE DOES NOT START (UNDER ANY CIRCUMSTANCES)

1.4 16v

The engine does not start. When the key is turned the instruments light up as normal, the starter motor turns, but the engine does not start up.

The VEHICLE PROTECTION system works properly

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
	Check that there is enough fuel in the tank. Turn the ignition switch ON for 2 seconds and then OFF. Check that the fuel pipe feels the pressure with the ignition ON. Check: Check the condition of the air filter; Check the condition of the air intake circuit; Check that there are no obstructions in the exhaust pipe	Move on to Step 1	Not enough fuel in the tank	Top up the fuel with the correct amount.
			No pressure in the fuel circuit	Move on to Step 2.
			Obstruction in the air intake circuit	Eliminate the problem, if necessary, replacing the filter element Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
			Air intake via the intake manifold/throttle body seal	Restore the correct seal
			Exhaust pipe blocked	Restore the operation of the exhaust pipe.
1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check: - there are no faults in the engine management control unit; - parameter plausibility	End of diagnosis	Error detected in the control unit	Continue following the instructions on the diagnostic equipment.
		End of diagnosis	Parameter not consistent	Continue following the instructions on the diagnostic equipment.
2	IGNITION SWITCH CHECK	All OK	Problems encountered	Operation
	Check that the ignition switch is working correctly See E5010 STARTING AND RECHARING	Move on to Step 3	Switch defective - contacts loose	Replace the ignition switch Op. 5520A10 IGNITION SWITCH ASSEMBLY - R+R
3	RPM SIGNAL CHECK	All OK	Problems encountered	Operation
	Check the operation of the rpm sensor by carrying out the See Test 5510CD RPM SENSOR COIL OPERATION CHECK See Test 5510CF RPM SIGNAL CHECK	Move on to Step 4	Sensor defective.	Replace the sensor
		Move on to Step 4	Wiring defective	Restore the correct wiring
4	FUEL SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the fuel supply pressure by carrying out Op. 0520G46 FUEL SYSTEM - CHECK SUPPLY PRESSURE USING THE EXAMINER Check the continuity of the wiring between the pump and the junction unit. Check that the pump relay is working properly Check the continuity of the wiring between the junction unit unit and the engine control unit	Move on to Step 5	Fuel pressure too low: pipes obstructed	Eliminate the constrictions
			Fuel pressure too low: pump defective	Replace the fuel pump assembly
			Wiring broken	Restore the correct wiring.
5	IGNITION SYSTEM CHECK	All OK	Problems encountered	Operation
	Inspect the spark plugs and check their operation Check for any defects in the high voltage leads Check for the ignition control signal by carrying out the See Test 5510CE IGNITION CONTROL SIGNAL CHECK Check that the ignition coils are working by carrying out the See Test 5510CI IGNITION COIL OPERATION CHECK	Move on to Step 6	Spark plugs defective	Replace spark plugs Op. 5510D10 SPARK PLUGS - R+R
			High voltage cable connection leaking	Replace HV cables.
			High voltage cable connection slack	Tighten HV cable correctly.
			Ignition signal interrupted	Restore the ignition signal.
			Coils defective	Replace coils Op. 5510C14 IGNITION COIL/S - R.R.
6	INJECTOR CHECK	All OK	Problems encountered	Operation
	Using the Examiner in active diagnosis, check that the injectors are working properly Check that the injector needle seal is correct Check the continuity of the injection wiring See Test 1056BA Injector operation check Check the operation of the main relay	Move on to Step 7	Injectors stuck/incorrectly adjusted	Replace the injector Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
			Connections not correct	Restore the correct connections See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
			Main relay defective	Replace the relay
7	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression check Op. 0520G15 COMPRESSION TEST - CHECK WITH EXAMINER WITH SPARK PLUGS/INJECTORS REMOVED	Move on to Step 9	Cylinder compression insufficient	Move on to Step 8
8	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	- R & R head to check valve seal - Check condition of cylinders/piston rings	Move on to Step 9	Valve seal insufficient	Restore the correct seal.
		Move on to Step 9	Cylinders/piston rings worn	Overhaul the head.
9	ENGINE CONTROL UNIT 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 engine does not start. When the key is turned the instruments light up as normal, the starter motor turns, but the engine does not start up.

0	PRELIMINARY CHECKS	ALL OK	PROBLEMS ENCOUNTERED	ACTION
		TEST RESULTS
	Turn the key to MAR and check that the initial check on the Engine Failure warning light takes place. NOTE: The Engine Failure warning light should come on and then go out when the engine is started. Then check: - that the inertia switch has cut in; - presence of fuel in the tank; - air intake circuit; - correct operation of the exhaust manifolds.	Move on to Step 1	1.The Engine Failure warning light does not carry out the initial test. 2.Inertia switch cuts in. 3.No fuel. 4.Filter dirty or partly blocked. 5.Drainage obstructed.	1.Proceed as instructed in the See table K053 M.I.L. WARNING LIGHT OFF (INITIAL TEST NOT CARRIED OUT) / ENGINE DOES NOT START 2.Restore correct operation. 3.Add fuel to the tank. 4.Replace the filter element. 5.Restore the operation of the drainage ducts.
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check: - that there are no errors in the control unit; - parameter plausibility.	Move on to Step 2	1. Error detected in the control unit. 2. Parameters not plausible. 3. No communication with the control unit.	1. Continue following the instructions on the diagnostic equipment. 2. Continue following the instructions on the diagnostic equipment. 3. Restore the connection between the engine control unit and the diagnostic connector.
2	HIGH PRESSURE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket. Check that the diesel pressure parameter is correct.	End of diagnosis	Pressure not correct	Move on to Step 3
3	INJECTOR WIRING CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the electrical connection between the engine management control unit and the injectors is correct See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 4	Wiring defective	Restore the correct wiring
4	INJECTOR CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner in active diagnosis check that the injectors are working properly.	Move on to Step 5	Injectors stuck shut	Replace the injectors Op. 1060F10 FUEL INJECTORS - R.R.
5	INJECTOR SEAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the injectors are correctly sealed.	Move on to Step 6	There is no seal for the injectors.	Replace the injectors Op. 1060F10 FUEL INJECTORS - R.R.
6	RPM SIGNAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the operation of the rpm sensor.	Move on to Step 7	1.Sensor defective. 2.Wiring defective.	1.Replace the sensor Op. 1060G20 ENGINE RPM SENSOR - R.R. 2.Restore the correct wiring.
7	TIMING SIGNAL CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the operation of the timing sensor.	Move on to Step 8	1. Sensor defective. 2.Wiring defective.	1.Replace the sensor Op. 1060G22 CAM ANGLE SENSOR - R.R 2.Restore the correct wiring.
8	CORRECT OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Replace the pressure pump and check that the fault is no longer present.	End of diagnosis	Fault persists: engine control unit defective.	Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R

1.4 16v TJet

The engine does not start. When the key is turned the instruments light up as normal, the starter motor turns, but the engine does not start up.

The VEHICLE PROTECTION system works properly.

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Test results
	Check that there is enough fuel in the tank. Turn the ignition switch ON for 2 seconds and then OFF. Check that the fuel pipe feels the pressure with the ignition ON. Check: - Check the condition of the air filter; - Check the condition of the air intake circuit; - Check that there are no obstructions in the exhaust pipe	Move on to Step 1	Not enough fuel in the tank	Top up the fuel with the correct amount.
			No pressure in the fuel circuit	Move on to Step 2.
			Obstruction in the air intake circuit	Eliminate the problem, if necessary, replace the filter element Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
			Air intake via the inlet manifold/throttle body seal	Restore the correct seal
			Exhaust pipe blocked	Restore the operation of the exhaust pipe.
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 present in the engine management control unit. - parameter plausibility	End of diagnosis	Error detected in the control unit	Continue following the instructions on the diagnostic equipment.
		End of diagnosis	Parameter not consistent	Continue following the instructions on the diagnostic equipment.
2	IGNITION SWITCH CHECK	All OK	Problems encountered	Operation
	Check that the ignition switch is working correctly See E5010 STARTING AND RECHARING	Move on to Step 3	Switch defective - contacts loose	Replace the ignition switch Op. 5520A10 IGNITION SWITCH ASSEMBLY - R+R
3	RPM SIGNAL CHECK	All OK	Problems encountered	Operation
	Check the operation of the rpm sensor	Move on to Step 4	Sensor defective	Replace the sensor
	Check the operation of the rpm sensor	Move on to Step 4	Wiring defective	Restore the correct wiring.
4	FUEL SUPPLY CHECK	All OK	Problems encountered	Operation
	Check the fuel supply pressure by carrying out See Test 1056BY FUEL SYSTEM SUPPLY PRESSURE CHECK Check the continuity of the wiring between the pump and the junction unit. Check that the pump relay is working properly Check the continuity of the wiring between the junction unit and the engine control unit See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 5	Fuel pressure too low: pipes obstructed	Eliminate the constrictions
			Fuel pressure too low: pump defective	Replace the pump assembly Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R
			Wiring broken	Restore the correct wiring.
5	IGNITION SYSTEM CHECK	All OK	Problems encountered	Operation
	Inspect the spark plugs and check their operation Check for any defects in the high voltage leads Check for the ignition control signal by carrying out the See Test 5510CE IGNITION CONTROL SIGNAL CHECK Check that the ignition coils are working by carrying out the See Test 5510CI IGNITION COIL OPERATION CHECK	Move on to Step 6	Spark plugs defective	Replace spark plugs Op. 5510D10 SPARK PLUGS - R+R
			High voltage cable connection leaking	Replace HV cables
			High voltage cable connection slack	Tighten HV cable correctly
			Ignition signal interrupted	Restore the ignition signal
			Coils defective	Replace coils Op. 5510C14 IGNITION COIL/S - R.R.
6	INJECTOR CHECK	All OK	Problems encountered	Operation
	Using the Examiner in active diagnosis, check that the injectors are working properly Check that the injector needle seal is correct Check the continuity of the injection wiring See Test 1056BA Injector operation check Check the operation of the main relay	Move on to Step 7	Injectors stuck/incorrectly adjusted	Replace the injector Op. 1056B70 INJECTOR (ONE) - R + R WITH FUEL MANIFOLD PIPE REMOVED - INCLUDES SEAL REPLACEMNT
			Connections not correct	Restore the correct connections See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT
			Main relay defective	Replace the relay
7	CYLINDER COMPRESSION CHECK	All OK	Problems encountered	Operation
	Carry out the cylinder compression check Op. 0510A10 CYLINDER COMPRESSION - CHECK FOR LOOSE SPARK PLUGS OR INJECTORS	Move on to Step 9	Cylinder compression insufficient	Move on to Step 8
8		All OK	Problems encountered	Operation
	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION R.R. the head to check the valve seal - Check the condition of the cylinders/piston rings	Move on to Step 9	Valve seal insufficient	Restore the correct seal.
		Move on to Step 9	Cylinders/piston rings worn	Overhaul the head.
9	ENGINE CONTROL UNIT 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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