B10 ENGINE DOES NOT START / UNDER NO CIRCUMSTANCES - Fiat - IDEA - eLearn

2398732 - B10 ENGINE DOES NOT START / UNDER NO CIRCUMSTANCES

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 CODE FAILURE WARNING LIGHT ON
		Continue to Step 1	Operation of inertia switch	Restore correct operation
1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the Examiner diagnostic equipment to the diagnostic socket and check the engine management control unit: for errors in the 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	Parameters not plausible	Continue according to the instructions for the diagnostic equipment
2	ACTIVE DIAGNOSIS OF FUEL PUMP	All OK	Problems met	Operation
	Carry out active testing of fuel pump and check if it is working 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	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 operation of ignition coils'	End of diagnosis	No spark at more than one coil	Continue to Step 6
		End of diagnosis	No spark at all the coils	Continue to Step 7
6	COIL ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check the continuity of the main circuit of the coils which are not working See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Continue to Step 8	Connections not correct	Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
7	COIL ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check the continuity of the main circuit of the coils See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT	Continue to Step 9	Connections not correct	Restore the connections See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT
8	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 defective coils Op. 5510C10Continue to Step 8
9	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	Replace engine management control unit Op. 1056B82