B10 Engine fails to start in any condition

Make: Alfa Romeo
Model: 147 Factory Service Manual
Year: 2000–2002
Section: Starting › B10 Engine fails to start in any condition

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Fault diagnosisB10 Engine fails to start in any condition

B10 Engine fails to start in any condition

Step	Test procedure	Result	Action
0	PRELIMINARY CHECKS Turn the key to the ON position and check that the I.E and CODE lights come on for the start-up test NOTE: 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 the switch off. Check that the inertia switch has not cut in the condition of the spark plugs and leads that there are no obstructions in the catalytic converter; that there is no water in the fuel	OK	Move onto step 1
		that the I.E light remains on	See table K50 E.I. FAILURE WARNING LIGHT ON End of diagnosis
		Both lights remain on	See table K51 BOTH FAILURE AND TAIL WARNING LIGHTS ON End of diagnosis
		The code light remains on	See table K52 CODE FAILURE WARNING LIGHT ON End of diagnosis
		The I.E light does not cary out the start-up test	See table K53 IE FAILURE WARNING LIGHT OFF End of diagnosis
		The CODE light does not carry out the start-up test	See table K54 CODE WARNING LIGHT OFF (INITIAL TEST NOT CARRIED OUT) End of diagnosis
		The warning lights do not do the initial test	See table K49 I.E. FAILURE WARNING LIGHT AND CODE WARNING LIGHT BOTH OFF End of diagnosis
		Operation of inertia switch	Restore correct operation End of diagnosis
		Spark plugs dirty or worn	Replace the spark plugs Op. 5510D10 End of diagnosis
		Spark plug leads damaged	Replace the leads End of diagnosis
		Catalytic converter/s blocked	Replace catalytic converter/s End of diagnosis
		Water in the carburettor	Clean the tank End of diagnosis
1	CHECK WITH DIAGNOSTIC EQUIPMENT Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket Verify: that there are no errors in the control unit the plausibiilty of the parameters	OK	Move onto step 2
		Error detected in the control unit	Continue following the instructions for the diagnostic equipment End of diagnosis
		Implausible parameters	Continue following the instructions for the diagnostic equipment End of diagnosis
2	ACTIVE TESTING OF FUEL PUMP Carry out active testing of fuel pump and check if it is working properly	OK	Move onto step 4
2		Pump not working	Move onto step 3
3	PETROL PUMP ELECTRICAL CIRCUIT CHECK Check the petrol pump supply and earth Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL	OK	Move onto step 4
		Connections not correct	Restore connections Wiring diagram E5030 PETROL ENGINES ELECTRONIC CONTROL End of diagnosis
		Pump faulty	Replace petrol pump Op. 1040A70 End of diagnosis
4	CHECKING DELIVERY PRESSURE Check that the fuel pressure is correct Op. 0510C10	OK	Move onto step 5
4		Pressure not correct	Eliminate any obstructions in the pipes. If necessary, replace the pump assembly Op. 1040A70 End of diagnosis
5	CHECKING CORRECT OPERATION Check that the fault is no longer present	OK	Incorrect selection of diagnostic procedure
5		Fault persists: control unit defective	Replace control unit Op. 1056B82 Incorrect selection of diagnostic procedure

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