22 · Diagnostics

Dipped headlamps not working

Make: Fiat
Model: Bravo Factory Service Manual
Year: 2007–2014
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

Neither of the main beam headlamps works under any condition

The main beam headlamps are controlled by the Steering Wheel Controls Node, managed by the Body Computer Node and activated by the Engine Compartment Junction Unit

The lights can be switched on/off using the following controls:

Specific command (from the Exterior Lights Control on the steering column)
Command from the dusk sensor
Follow me home command

0	PRELIMINARY CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
		TEST RESULTS
	Activate the appropriate command and check whether the warning light on the dashboard comes on.	Move on to Step 4	The warning light is not activated.	Move on to Step 1
1	BATTERY VOLTAGE CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check correct battery voltage	Move on to Step 2	Battery voltage incorrect.	Restore correct battery voltage.
2	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Connect the Examiner diagnostic equipment and check whether the following parameters are present and that there are no errors in the Body Computer mode	Move on to Step 3	1. Impossible to connect to the control unit. 2. Presence of errors	1. Replace the Body Computer control unit after having acertained it is defective Op. 5505A35 MAIN BODY COMPUTER/JUNCTION UNIT - R.R. 2. Continue as described by the diagnostic equipment
3	ACTIVE DIAGNOSIS CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	With the Examiner in the Body Computer mode check that the function in question is correctly activated in Active Diagnosis. - Left/right main beam headlamps control	End of diagnosis	1. Impossible to activate one of the main beam headlamps. Because of a blown lightbulb 2. Impossible to activate one of the main beam headlamps. Because of interrupted wiring	1.Replace lightbulb. 2.Restore correct wiring.
4	CHECK USING DIAGNOSTIC EQUIPMENT	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check that the dipped headlamps control at the steering column switch unit is working properly	End of diagnosis	1.Steering column stalk unit faulty 2.Engine compartment control unit faulty	1.Replace the steering column stalk unit Op. 5550A10 STALK UNIT ASSEMBLY - R+R 2.Move on to Step 5
5	ENGINE COMPARTMENT CONTROL UNIT ELECTRICAL CIRCUIT CHECK	ALL OK	PROBLEMS ENCOUNTERED	ACTION
	Check the electrical circuit for the Engine Compartment Control Unit, in the following order: - Protective/supply fuse(s). - Wiring between Body Computer and Engine Compartment control unit - Check the continuity of the engine compartment control unit. See E2011 DIPPED HEADLAMPS	End of diagnosis	1.Protective fuse/s blown. 2.Wiring defective. 3.Engine compartment control unit faulty.	1.Replace the component involved (in the case of a fuse, find out what caused it to blow). 2.Restore the correct wiring 3.Replace the engine compartment control unit

Xenon Gas headlamps

it should be remembered that xenon bulbs do not have a filament and cannot therefore be tested using an ohmmeter

1	CHECK USING DIAGNOSTIC EQUIPMENT	All OK	Problems encountered	Operation
		Test results
	Check the master headlamp control unit (left side) and check for errors. Connect to the slave headlamp control unit (right side) and check for errors.	Move on to Step 2	Error B1010 detected - xenon lamp fails to come on	Move on to Step 4
			Error B1050 detected - power supply wiring resistance	Move on to Step 3
			Error B1001detected - xenon lamp high tension operation	Replace the lamp control unit where the error was detected Op. 5540B40 CONTROL UNIT IN LEFT GAS DISCHARGE LIGHT CLUSTER - R.R. and/or Op. 5540B41 CONTROL UNIT IN RIGHT GAS DISCHARGE LIGHT CLUSTER - R.R.
2	IGNTION-OPERATION POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	With the ignition key in the ON position, check that the voltage at the headlamps si correct by carrying out the See Test 5540BJ IGNITION-OPERATED HEADLAMP POWER SUPPLY CHECK	Move on to Step 3
3	DIPPED BEAM POWER SUPPLY CHECK	All OK	Problems encountered	Operation
	Turn the steering column switch unit lever to the dipped headlamps position and check that the voltage at the headlamps is correct, by carrying out the See Test 5540BA DIPPED BEAM CIRCUIT CHECK	Move on to Step 4
4	CHECK ON OPERATION OF BULBS	All OK	Problems encountered	Operation
	Check that the bulbs are working by tyring to replace them Op. 5540B45 GAS DISCHARGE DIPPED/MAIN BEAM HEADLAMP BULB - R.R.	End of diagnosis	Right headlamp bulb defective (after it is replaced it works correctly)	Restore the original bulb for the left headlamp (which is still off) and move on to Step 5
		End of diagnosis	Left headlamp bulb defective (after it is replaced it works correctly)	Restore the original bulb for the right headlamp (which is still off) and move on to Step 5
5	HEADLAMP WIRING CHECK	All OK	Problems encountered	Operation
	Check the continuity of the wiring between the master and slave headlamp 14-way connector and the control unit side connector by conducting the See Test 5540BK CHECK THE CONTINUITY OF THE LOW BEAM WIRING INSIDE THE HEADLAMP	End of diagnosis	The fault persists	Contact the Service Department for further information on the problem

‹ 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 2007 Fiat Bravo

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