I80 HEADLAMP ALIGNMENT CORRECTOR NOT WORKING - Fiat - STILO - eLearn

3360251 - I80 HEADLAMP ALIGNMENT CORRECTOR NOT WORKING

Headlamps cannot be adjusted with low beams on.

Low beam alignment button on external lights control panel sends a command directly to the Instrument Panel Node (NQS), which controls the actuator motors by sending different voltage signals.

1	CHECK WITH DIAGNOSTIC EQUIPMENT	All OK	Problems met	Operation
		Results of the tests
	Connect the diagnostic equipment to the tester input and check on the instrument panel: plausibility of headlamp alignment parameter	Continue to Step 2	Parameter not plausible	Continue to Step 12
2	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check that the voltage for enabling the headlamp alignment from the left dipped headlamp line is present at the instrument panel connector with the dipped headlamps on. See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 5	No voltage	Continue to Step 3
3	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check the continuity of the wiring enabling the headlamp alignment between the instrument panel and the dashboard control unit See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 4	Wiring broken	Renew the wiring See E3080 HEADLAMP AGLINMENT CORRECTOR
4	CHECKING FACIA CONTROL UNIT	All OK	Problems met	Operation
	Check the continuity of the circuit for enabling the internal lamp alignment at the dashboard control unit See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 5	Circuit broken	Replace facia control unit Op. 5505A10
5	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check that the supply voltage for the headlamp alignment actuators is present at the headlamp connectors See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 8	Wiring broken	Continue to Step 6
6	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check the continuity of the actuator positive supply wiring from the Dashboard Control Unit to the junction node and the headlamp connector See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 7	Wiring broken	Renew the wiring See E3080 HEADLAMP AGLINMENT CORRECTOR
7	CHECKING FACIA CONTROL UNIT	All OK	Problems met	Operation
	Check the continuity of the control and positive actuator power circuit inside the facia control unit See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 8	Circuit broken	Replace facia control unit Op. 5505A10
8	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check that the alignment control signal is present at the headlamp connectors with the dipped headlamps on See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 15	No signal	Continue to Step 9
9	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check the continuity of the control signal wiring between the instrument panel and the facia control unit See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 10	Wiring broken	Renew the wiring See E3080 HEADLAMP AGLINMENT CORRECTOR
10	CHECKING FACIA CONTROL UNIT	All OK	Problems met	Operation
	Check the continuity of the facia control unit internal circuit signal See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 11	Circuit broken	Replace facia control unit Op. 5505A10
11	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check the continuity of the control signal wiring from the Dashboard Control Unit to the junction node and the headlamp connector See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 14	Wiring broken	Renew the wiring See E3080 HEADLAMP AGLINMENT CORRECTOR
12	EXTERIOR LIGHTS CONTROL PANEL CHECK	All OK	Problems met	Operation
	Check correct operation of the low beam alignment control button See Test 5540AA Checking Exterior Lighting Control (C.L.E.)	Continue to Step 13	Control on panel defective	Change exterior lighting control panel Op. 5540A20
13	CHECKING ELECTRICAL EQUIPMENT	All OK	Problems met	Operation
	Check continuity/insulation of wiring between control panel and instrument panel See E3080 HEADLAMP AGLINMENT CORRECTOR	Continue to Step 16	Wiring broken or short-circuited	Renew the wiring See E3080 HEADLAMP AGLINMENT CORRECTOR
14	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check it is working properly.	End of diagnosis	Fault persists	Replace instrument panel Op. 5560B11
15	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check it is working properly.	End of diagnosis	Fault persists	Change headlamps Op. 5540B10
16	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check it is working properly.		Fault persists	Search for the fault starting from another symptom'