22 · Diagnostics

Front interior lights not working

Make: Lancia
Model: Thesis Factory Service Manual
Year: 2002–2009
Section: Lights › Front interior lights not working

‹ Prev Direction indicators not working when the hazard warning light button is pressed Next › Rear courtesy lights not working

Fault diagnosisFront interior lights not working

FRONT INTERIOR LIGHTS NOT WORKING

The courtesy lights or the front right/left map reading lights are not working under any circumstances.

the front courtesy lights are switched on by the Body Computer Node via the Roof Node.

The switching on information is sent via messages on the B-CAN.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that there are no faults relating to Dusk/rain sensor Volumetric/tilt sensors	Move on to Step	Faults present	Move on to Step
1	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the CAN: That there are no nodes activated That there are no faulty nodes	Move on to Step	1. Roof node not activated	Move on to Step
		Move on to Step	2. Faulty nodes	2. Continue following the instructions for the diagnosis for the faulty nodes
2	ELECTRICAL SYSTEM CHECK.	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Remove the front courtesy light and check for the roof node electronic earth and supply (Wiring Diagram ) E2510 COURTESY LIGHTS	Move on to Step	1. Supply not present	Move on to Step
		Move on to Step	2. Earth not present	Move on to Step
3	ELECTRICAL SYSTEM CHECK.	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check: The condition of the supply wiring from the Body Computer Node to the Roof Node The condition of the wiring from the Roof Node to the earth point The inner tracks of the Dashboard Junction Unit and the Body Computer Node (Wiring Diagram ) E2510 COURTESY LIGHTS	Move on to Step	1. Supply wiring interrupted or short circuitd to earth	Restore the electrical connection (Wiring Diagram ) E2510 COURTESY LIGHTS
			2. Earth wiring interrupted	2. Restore the electrical connection (Wiring Diagram ) E2510 COURTESY LIGHTS
			3. Dashboard Junction Unit inner tracks	3. Replace the Dashboard Junction Unit See in Op. 5505A10 Junction UNIT - R.R.
			4. Body Computer inner tracks interrupted	4. Replace body computer See in Op. 5505A32 BODY COMPUTER - R.R.
4	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the Roof NodeIn active diagnosis ambient: the operation of the courtesy lights and the map reading lights	Move on to Step	The lights do not come on	Move on to Step
5	COURTESY LIGHT BULBS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Remove the courtesy light and check the condition of the bulbs	Move on to Step	Bulbs burnt out	Replace the bulbs
6	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment to the diagnostic connector and check the following at the Body Computer Node In active diagnosis ambient:the operation of the courtesy lights and the map reading lights	Move on to Step	The lights do not come on	Replace the Roof Node
7	END OF CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present		The fault persists	Replace body computer See in Op. 5505A32 BODY COMPUTER - R.R.

‹ Prev Direction indicators not working when the hazard warning light button is pressed Next › Rear courtesy lights not working

Parts & tools for this job For 2002 Lancia Thesis

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