23 · Diagnostics

Mil warning light stays on (engine starts)

Make: Alfa Romeo
Model: 159 Factory Service Manual
Year: 2005–2011
Section: Instrument panel › Mil warning light stays on (engine starts)

‹ Prev Mil warning light not working (remains off before starting)Next › Display module no signal - to check panel

Fault diagnosisMil warning light stays on (engine starts)

MIL WARNING LIGHT STAYS ON (ENGINE STARTS)

The M.I.L. warning light remains on with the engine running

the M.I.L. warning light is switched on by means of an earth command from the Engine Management Node.

1.9 JTD 8V, 1.9 JTD 16V, 2.4 JTD 20V

1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic connector and check that there are no faults at the Engine Management Node	Move on to Step 2	Presence of faults in the system	Proceed as instructed by the diagnostic tester
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Keeping the diagnostic equipment connected to the diagnostic socket and check the operation of the engine failure warning light through active diagnosis at the Engine Management Node	Move on to Step 6	The warning light does not flash	Move on to Step 3
3	WARNING LIGHT OPERATION CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Disconnect the Engine Management Node from the vehicle side wiring and check that the warning light goes out	Move on to Step 6	The warning light does not go out	Move on to Step 4
4	ELECTRICAL SYSTEM CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the insulation of the warning light control cable between the Engine Management Node and the Instrument Panel Node See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT	Move on to Step 5	Cable short circuited to earth	Restore the electrical connections.
5	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace the instrument panel and move on to Step 6 Op. 5560B10 CONTROL PANEL - R+R
6	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace the engine management control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R
6	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present	End of diagnosis	Fault persists	Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R

‹ Prev Mil warning light not working (remains off before starting)Next › Display module no signal - to check panel

Parts & tools for this job Staging For 2005 Alfa Romeo 159

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.