22 · Diagnostics

Dipped headlamps not working

Make: Lancia
Model: Ypsilon Factory Service Manual
Year: 2003–2011
Section: Lights › Dipped headlamps not working

‹ Prev Side lights / number plate light and dipped beams do not work in auto mode Next › Main beam headlamps not working

Fault diagnosisDipped headlamps not working

DIPPED HEADLAMPS NOT WORKING

When the steering column switch unit ring nut is operated with the ignition ON, the dipped headlamps do not work

1	CHECKING WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect the Examiner to the diagnostic socket check that there are no faults in the Body Computer the operation of the lights in active diagnosis.	Continue to Step 3	Dipped headlamps relay error (in dashboard control unit)	Check the dipped headlamps relay. Continue to Step 3
		Continue to Step 3	Lights not activated	Check the individual lights. Continue to Step 2
2	CHECK ON INDIVIDUAL LIGHTS	All OK	Problems met	Operation
	Check the condition of individual bulbs and light units.	Continue to Step 3	Bulbs damaged	Replace bulbs
			Bulbs damaged	Repair or replace front lights cluster
			Bulbs damaged	Repair or replace front lights cluster
3	DIPPED HEADLAMPS ELECTRICAL CIRCUIT CHECK	All OK	Problems met	Operation
	Check, in order: right and left dipped headlamp fuses; dipped headlamps relay connections between steering column switch unit and Body Computer; connections between Body Computer and dashboard control unit; connections between dashboard control unit and bulbs; bulb earth: wiring diagram See E2011 DIPPED HEADLAMPS	Continue to Step 4	Defective component	Replace the component involved (if a fuse is involved, search for the cause of the problem)
			Connections broken	Restore the connections: wiring diagram See E2011 DIPPED HEADLAMPS
			Lamps earth defective	Restore the bulb earth: wiring diagram See E2011 DIPPED HEADLAMPS
4	CHECK ON STEERING COLUMN SWITCH UNIT	All OK	Problems met	Operation
	Check that the stalk unit is working properly; in particular check the side lights switch	Continue to Step 5	Stalk unit not working properly	Replace the stalk unit
5	CHECK ON BODY COMPUTER	All OK	Problems met	Operation
	Check that the Body Computer is supplied properly Check that when an earth signal from stalk unit to Body is activated, an earth signal is emitted from the Body to drive the dipped beam headlamps relay: See E2011 DIPPED HEADLAMPS	Continue to Step 6	Body Computer supply incorrect	Restore the correct supply See E2011 DIPPED HEADLAMPS
		Continue to Step 6	Body Computer defective	Replace the Body Computer
6	CHECK ON CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

‹ Prev Side lights / number plate light and dipped beams do not work in auto mode Next › Main beam headlamps not working

Parts & tools for this job For 2003 Lancia Ypsilon

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