B10 ENGINE DOES NOT START / UNDER NO CIRCUMSTANCES - Alfa - 156 - eLearn

3233003 - 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 there is a fault in the reconfigurable matrix the CODE failure message comes on.

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	First check that there is fuel in the tank and whether the inertia switch has intervened Then check: that there is no water, other fluid or dirt in the fuel tank the state of the spark plugs and leads the condition of the air intake circuit for a possible obstruction in the catalyzer	Continue to Step 1	Presence of dirt in the fuel tank	Clean the fuel tank Op. 1040A10
			Spark plugs dirty or damaged	Clean or replace the spark plugs Op. 5510D10
			Spark plug leads damaged	Replace the spark plug leads Op. 5510D14
			Air intake circuit component damaged	Replace the component (see Assembly 1048A)
			Catalyzer obstructed	Replace the catalyzer Op. 1080B62
1	CHECK I.E. AND CODE FAILURE WARNING LIGHTS	All OK	Problems met	Operation
	Place the key in the ON position and check that: the i.e. failure warning light comes on for about 4 seconds and then goes out. the CODE warning light comes on for less than a second and then goes out	Continue to Step 2	The i.e. warning light comes on and remains on	See table K50
			The CODE warning light comes on and remains on	See table K52
			Both the warning lights come on and remain on	See table K56
			The i.e. failure warning light does not come on	See table K53
			The CODE warning light does not come on	See table K55
2	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket check that there are no faults in the engine management control unit the plausibility of all the parameters.	Continue to Step 3	An error is detected in the control unit	Continue according to the instructions for the diagnostic equipment
			Lack of dialogue with the control unit	Restore the connection between the engine management control unit and the diagnostic connector ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT ).
			No control unit connection to earth	Restore connection
3	CHECK ON INJECTORS	All OK	Problems met	Operation
	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the injectors	Continue to Step 4	Injector connections faulty	Restore the connection of the injectors with the control unit, ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT )
		Continue to Step 4	Injectors faulty	Replace the injectors Op. 1056B70
4	CHECK FUEL PUMP	All OK	Problems met	Operation
1.8 TS [d] 2.5 V6	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis for the fuel pump relay	Continue to Step 5	Fuel pump relay faulty	Restore the connections between the: fuel pump relay fuel pump engine management unit inertia switch ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT )
1.8 TS [d] 2.5 V6		Continue to Step 5	Fuel pump faulty	Replace the fuel pump assembly Op. 1056B70
1.6 TS	Check, in order: fuel pump relay connection between relay, fuel pump and engine management control unit connection between fuel pump and inertia switch operation of fuel pump ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT ).	Continue to Step 5	Connections not correct	Restore the connections
1.6 TS		Continue to Step 5	Fuel pump faulty	Replace the fuel pump assembly Op. 1056B70
5	COIL CHECK	All OK	Problems met	Operation
2.5 V6	Using the diagnostic equipment (Examiner or other instruments) carry out the active diagnosis of the coils	Continue to Step 6	Coils connection faulty	Restore the connection for the coils with the control unit, ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT )
2.5 V6		Continue to Step 6	Ignition coils faulty	Replace the ignition coils Op. 5510C14
1.6 TS 1.8 TS [d]	Check, in order: coils supply connection of the coils with the engine management control unit connection of spark plugs to coils operation of coils ( See E5030 PETROL ENGINE ELECTRONIC MANAGEMENT ).	Continue to Step 6	Connections not correct	Restore the connections
1.6 TS 1.8 TS [d]		Continue to Step 6	Ignition coils faulty	Replace the ignition coils Op. 5510C14
6	CHECK ON FUEL PRESSURE	All OK	Problems met	Operation
	Check the fuel supply pressure Op. 0510C10	Continue to Step 7	Pressure not correct	Replace the fuel pump assembly Op. 1056B70
7	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis	Fault persists	Search for the fault starting from another symptom'