Engine does not start / under no circumstances

Make: Fiat
Model: Panda Factory Service Manual
Year: 2003–2012
Section: Starting › Engine does not start / under no circumstances

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Fault diagnosisEngine does not start / under no circumstances

ENGINE DOES NOT START / UNDER NO CIRCUMSTANCES

1.1, 1.2 8v

The engine does not start. When the key is turned, the instruments light up, the starter motor turns to the AVV position, but the engine will not start.

The MIL warning light should come on with the ignition on and go out once the engine has started. If the Code is faulty, the CODE system failure will be indicated by the instrument panel.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Check, in order: that there is no CODE system failure that the inertia switch has not cut in	Continue to Step 1	CODE failure present	Continue according to the instructions See table K52
		Continue to Step 1	Operation of inertia switch	Restore correct operation
1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner Plus or Smart) to the diagnostic socket and check the following at the engine management control unit: for errors in control unit; plausibility of 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	unreliable parameters	Continue according to the instructions for the diagnostic equipment
2	ACTIVE DIAGNOSIS OF FUEL PUMP	All OK	Problems met	Operation
	Conduct active diagnosis of the fuel pump and check that it operates properly	Continue to Step 4	Pump not working	Continue to Step 3
3	PETROL PUMP ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check the petrol pump supply and earth See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Continue to Step 4	Connections not correct	Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
		Continue to Step 4	Pump faulty	Replace petrol pump Op. 1040A70
4	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check that the fuel pressure is correct Op. 0510C10	Continue to Step 5	Incorrect pressure: front pipe obstructed	Remove obstructions If necessary, replace the pipe
	Check that the fuel pressure is correct Op. 0510C10	Continue to Step 5	Incorrect pressure: faulty fuel pump assembly	Replace the pump assembly Op. 1040A70
5	IGNITION OPERATION CHECK	All OK	Problems met	Operation
	Check that the ignition is working properly at the coils by carrying out See Test 5510CC Check that the ignition coils are working	End of diagnosis	No spark at the coil	Continue to Step 6
6	COIL ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check the continuity of the coil main circuit See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Continue to Step 7	Connections not correct	Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
7	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists: coil defective	Replace the coil Op. 5510C10 Continue to Step 8
8	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists: control unit faulty	Refit the original coil and replace the engine management control unit Op. 1056B82

1.3 JTD 16v

The engine does not start. When the key is turned, the instruments light up, the starter motor turns to the AVV position, but the engine will not start.

The MIL warning light should come on with the ignition on and go out once the engine has started. If the Code is faulty, the CODE system failure will be indicated by the instrument panel.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Turn the ignition on and check that the CODE is working properly The I.E light should come on for about 4 seconds and then switch off, while the CODE light should come on for about 1 second and then switch off. Then check: that the inertia switch has not been operated; that there is fuel in the tank that the air filter and air intake circuit are working properly correct operation of the exhaust pipes; that there are no leaks from the high- and low-pressure fuel pipes; that there is no petrol, water, paraffin or dirt in the diesel filter	Continue to Step 1	CODE fault message present	Continue according to the instructions See table K52
			Operation of inertia switch	Restore correct operation
			No fuel	Put fuel in the tank
			Air filter dirty or partly obstructed	Replace the filter element Op. 1048A14
			Exhaust blocked	Repair the exhaust pipes
			There are leaks	Eliminate the leaks
			Presence of water, petrol, paraffin or dirt detected	Clean the tank and pipes and replace the diesel filter cartridge Op. 1044B20
1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner diagnostic equipment to the diagnostic socket. Check: for errors in the control unit	Continue to Step 2	For the presence of one of the following errors: P0262, P0265, P0268, P0271	Continue to Step 8
			Presence of error P0093	Continue to Step 6
			Simultaneous presence of errors P1191 and P1197	Continue to Step 9
			Simultaneous presence of errors P1194 and P1197	Continue to Step 9
			Presence of error P1191	Continue to Step 7
			Presence of one of the following errors: P1193, P1195 P1196	Continue to Step 7
			Presence of error P0335	Continue to Step 3
			Presence of error P0340	Continue to Step 4
			Presence of error P005 and/or P0230	Check the condition of the wiring for the electric fuel pump (in particular the operating relay), if necessary, restore correct operation
			Presence of error P0090	Check the condition of the wiring for the fuel pressure regulator, if necessary, restore correct operation
			Presence of error P1194	Continue to Step 7
			Presence of error P0683 and/or P0380	Continue to Step 5
			Presence of other errors	Continue according to the instructions for the diagnostic equipment
2	CHECK ON FLOW MODULATING VALVE ACTUATOR	All OK	Problems met	Operation
	Check: No mechanical problems keeping the valve closed Pneumatic actuator operation Solenoid valve wiring Plausibility of status parameter using diagnostic equipment	Continue to Step 3	Mechanical problems	Restore correct operation
			Actuator not working	Replace electropneumatically-controlled throttle body Op. 1060G52
			Wiring faulty	Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
3	RPM SENSOR CHECK	All OK	Problems met	Operation
	Check the operation of the rpm sensor carrying out See Test 1060GA Check on efficiency of rpm sensorand checking the condition of the wiring	Continue to Step 4	Sensor faulty	Replace sensor.
		Continue to Step 4	Wiring faulty	Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
4	TIMING SENSOR CHECK	All OK	Problems met	Operation
	Check the operation of the timing sensor and carry out the test See Test 1060GC Check on operation of timing sensorand check the condition of the wiring	Continue to Step 5	Sensor faulty	Replace sensor.
		Continue to Step 5	Wiring faulty	Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
5	PRE-HEATING SYSTEM CHECK	All OK	Problems met	Operation
	Check the condition of the wiring and the operation of the pre-heating system (heater plugs)	Continue to Step 6	Wiring faulty	Renew the wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
		Continue to Step 6	Heater plugs faulty	Replace damaged heater plugs
6	HIGH RESSURE CIRCUIT CHECK	All OK	Problems met	Operation
	Check the condition of and that there are no leaks from the rail, the radial jet pump, the injector pipes and all the high pressure lines.	Continue to Step 7	There are leaks	Eliminate leaks from the system
7	HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Check as described in the See Test 1060D Check high pressure fuel circuitthat the diesel pressure parameter is correct; Check the operation of the high pressure sensor on the rail carrying out See Test 1060GE Check on operation of diesel high pressure sensor The operation of the pressure regulator through active diagnosis.	Continue to Step 8	Sensor faulty	Replace sensor.
			Pressure regulator faulty	Replace the pressure regulator
			Pressure not correct	Continue to Step 9
8	INJECTOR HIGH PRESSURE CHECK	All OK	Problems met	Operation
	Check, as described in the test See Test 1060C Injector high pressure fuel circuit check	Continue to Step 9	Consistent leak from one injector	Replace the injector
9	CHECK ON RETURN LOW PRESSURE	All OK	Problems met	Operation
	Check as described in the test See Test 1060A Low return fuel pressure circuit checkthat the pressure in the return pipe to the tank is under 1 bar	Continue to Step 10	Pressure above maximum limit: return pipe to tank blocked	Repair the pipe; if necessary replace it
10	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check as described in the test See Test 1060B Low fuel pressure supply circuit checkthat the diesel pressure between filter and pressure pump is between 2 and 3 bar	Continue to Step 16	Pressure below minimum limit or above maximum limit	Continue to Step 11
11	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Choke the return pipe below the valve and repeat the test See Test 1060B Low fuel pressure supply circuit checkwith the pipe choked, checking that the filter outlet pressure remains below 2 bar	Continue to Step 12	Pressure rises to 5 bar: blocked pressure regulation valve on filter support	Replace the valve Op. 1044B16
12	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check that the difference in pressure upstream and downstream of the filter is less than 1 bar	Continue to Step 13	Difference in pressure greater than 1 bar	Replace the fuel filter cartridge Op. 1044B20
13	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check that the supply pump pressure at the filter inlet is over 2.2 bar	Continue to Step 16	Pressure below 2.2 bar	Continue to Step 14
14	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Measure the difference in pressure between electric pump outlet and filter inlet and check that it is less than 0.3 bar	Continue to Step 15	Difference in pressure greater than 0.3 bar	Replace the pipe
15	LOW SUPPLY PRESSURE CHECK	All OK	Problems met	Operation
	Check as described in the test See Test 1040AA Check supply voltage and absorption currentthat the pump's supply voltage is 13V and that the absorbed current is less than or equal to 4.6 amps	Continue to Step 16	Voltage below 12 V	Check electric wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
		Continue to Step 16	Current greater than 4.6 amps: pump faulty	Replace the fuel pump assembly Op. 1040A70
16	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Replace the high-pressure regulating valve and check that the fault is no longer present.	End of diagnosis	Fault persists:	Continue to Step 17
17	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Replace the pressure pump and check that the fault is no longer present	End of diagnosis	Fault persists	Contact Technical Service for further information on the problem
18	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Replace the engine management control unit and check that the fault is no longer present	End of diagnosis	Fault persists	Contact Technical Service for further information on the problem

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