22 · Diagnostics

Side lights not working

Make: Fiat
Model: Ulysse Factory Service Manual
Year: 2002–2010
Section: Lights › Side lights not working

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Fault diagnosisSide lights not working

SIDE LIGHTS NOT WORKING

When the stalk switch wheel is operated with the key ON, the side lights and/or number plate lights do not work.

Numerous faults, remote control not working, the buzzer cannot be heard, with the key on, Air Bag failure signal, rearscreen wiper on, side lights on and, especially, the engine does not start, could be caused by a break in the steering column switch unit positive supply fuse.

STEP	OPERATIONS TO BE CARRIED OUT	TEST RESULTS
0	PRELIMINARY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the battery voltage is correct.	Move on to Step	Battery voltage not correct.	Restore the correct voltage.
1	STEERING COLUMN SWITCH UNIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the steering column switch unit is working properly, especially the switch for the side lights and the engagement of the relay in the Body Computer.	Move on to Step	1. Stalk unit not working properly	1. See table I01 SIDE LIGHTS/NO. PLATE LIGHTS NOT WORKING
			2. All the side lights do not come on and the relay in the Body Computer cannot be heard switching	Move on to Step
			3. The relay switches but the left/right side lights are not working.	3. Replace the component involved (in the case of a fuse, find out what caused it to blow). See E2010 SIDE LIGHTS / NO. PLATE LIGHTS
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment and check for the presence and variation of the parameters in the Body Computer ambient	Move on to Step	Impossible to connect with the control unit.	Move on to Step
3	ERRORS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using the Examiner in the Body Computer ambient check for the presence of one or more of the following errors: Connection error between BSI and other control units (steering column switch unit, lights) Communication error Inconsistent command for lighting, side lights Error in the steering column switch unit control unit Connection error with Lights Module Front/rear left/right side light error	Move on to Step	1. No communication between BSI and Steering Column Switch Unit detected	Move on to Step
			2. Error in the lights operation.	Move on to Step
			3. Error in the steering column switch unit control unit.	Move on to Step
			4. Connection with individual lights faulty.	4 See table I09 SIDE LIGHT (ONE) FRONT. OR REAR. - RH OR LH NOT WORKING
4	DATA TRANSMISSION LINE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the positive supply (12 Volt) is correct at the data transmission lines between the Body Computer and the Steering Column Switch Unit COM2000 See E2010 SIDE LIGHTS / NO. PLATE LIGHTS	Move on to Step	1. Wiring faulty	1. Restore the electrical connections.
			2. BSI Body Computer control unit faulty	2. Replace the BSI control unit.
			3. Steering Column Switch Unit Node COM2000 control unit faulty.	3. Replace the Steering Column Switch Unit COM2000 control unit.
5	BSI SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the positive supply is correct and check the Body Computer earth connections See E2010 SIDE LIGHTS / NO. PLATE LIGHTS	Move on to Step	1. Check that the positive supply is correct and check the Body Computer earth connections	1. Renew and/or replace the component involved (in the case of a fuse, find out what caused it to blow).
			2. Earth connections not working properly.	2. Restore the earth connection.
			3. Body Computer faulty	3. Replace the Body Computer Node control unit (BSI).
6	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner diagnostic equipment in the Body Computer ambient check that the function in question is correctly activated in Active Diagnosis. Front/rear left/right side light operation error	Move on to Step	Impossible to activate one of the side lights.	See table I09 SIDE LIGHT (ONE) FRONT. OR REAR. - RH OR LH NOT WORKING
7	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Using the Examiner check for the presence and variation of the parameters in the Steering Column Switch Unit COM2000 ambient, namely: Lights operation	Move on to Step	1. Impossible to connect with the control unit.	Move on to Step
		Move on to Step	2. Side lights control not working.	2. Replace the Steering Column Switch Unit Node COM2000 control unit
8	STEERING COLUMN SWITCH UNIT SUPPLY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the positive supply is correct and check the Steering Column Switch Unit Node COM2000 earth connections See E2010 SIDE LIGHTS / NO. PLATE LIGHTS	Move on to Step	1. Positive supply and/or wiring faulty.	1. Renew and/or replace the component involved (in the case of a fuse, find out what caused it to blow).
			2. Earth connections not working properly.	2. Restore the earth connection.
			3. Steering Column Switch Unit Node COM2000 faulty	3. Replace the Steering Column Switch Unit Node COM2000 control unit.
9	CHECK ON CORRECT OPERATION	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the fault is no longer present

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Parts & tools for this job For 2002 Fiat Ulysse

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