23 · Diagnostics

Ignition switch not working

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Starting › Ignition switch not working

‹ Prev Tilt sensor alarm not working Next › Key cannot be extracted from block

Fault diagnosisIgnition switch not working

IGNITION SWITCH NOT WORKING

When the key is inserted in the ignition the steering is released normally, the instruments light up, the unlocking-locking motor allows the rotation of the key to the starting position, but the starter motor does not work

0	PRELIMINARY CHECKS	All OK	Problems encountered	Operation
		Results of the tests
	Carry out starting with brake pedal released, if the result is negative try pressing the brake pedal	End of diagnosis	The engine only starts with the brake pedal pressed	Move on to Step 1
1	CLUTCH SWITCH CHECK	All OK	Problems encountered	Operation
	Check that the clutch switch is not short circuited Check that the clutch pedal is not pressed for 5 minutes or longer. Check that the clutch switch wiring is not short circuited. Check that the switch is correctly adjusted	Move on to Step 2	Clutch switch short circuited/interrupted	Replace the switch Op. 1060G52 PNEUMATICALLY CONTROLLED THROTTLE BODY - REPLACE
			Pedal pressed for more than 5 minutes	Remove your foot from the clutch pedal
			Switch wiring short circuited/interrupted	Restore wiring See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
			Switch not correctly adjusted	Adjust switch
2	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
	Connect the diagnostic equipment to the diagnostic socket and check: - that there are no errors at the B-Can - that there are no errors at the NBS node - parameter plausibility	Move on to Step 3	Errors at the B-Can	Continue following the instructions for the diagnostic equipment
			Errors at the NBS node	Move on to Step 4
			Parameters not plausible	Restore parameter plausibility
3	STARTING BUTTON CHECK	All OK	Problems encountered	Operation
	Check the starting button is working properly See Test 5520GA IGNITION PUSH BUTTON CHECK	End of diagnosis
4	STEERING LOCK NODE CHECK	All OK	Problems encountered	Operation
	Check: - continuity of wiring at the steering lock node - that the power supply is correct - correct starting signal output See Test 5580ED ELECTRIC STEERING LOCK CHECK	Move on to Step 5
5	STARTING SIGNAL CHECK	All OK	Problems encountered	Operation
	With the key inserted, the START/STOP button in the START position and the clutch pedal pressed, check that the voltage at the starter motor solenoid is +50 V AVV See E7065 ELECTRIC STEERING LOCK	End of diagnosis	Starting signal wiring interrupted from the steering lock node to the battery control unit	Restore wiring See E7065 ELECTRIC STEERING LOCK
			Wiring from battery control unit to starter motor	Restore wiring See E7065 ELECTRIC STEERING LOCK
			Starter motor defective	Replace the starter motor Op. 5520B10 STARTER MOTOR - R+R

‹ Prev Tilt sensor alarm not working Next › Key cannot be extracted from block

Parts & tools for this job For 2005 Alfa Romeo 159

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