Workshop Manuals Factory service & repair Fiat
01 General information02 Specifications03 Manufacturing data and tolerances04 Tightening torques05 Fluids and lubricants06 Maintenance07 Diagnostic checks08 Engine09 Clutch10 Gearbox and differential11 Axles and driveshafts12 Brakes13 Steering14 Suspension and wheels15 Heating, air conditioning and auxiliary units16 Electrical equipment17 Body fittings18 Body panels and frame19 Wiring diagrams and electrical functions20 Wiring harnesses21 Connectors and pin-outs22 Fault diagnosis23 Special tools
Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Day lights do not come on with engine started

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
Section
Lights › Day lights do not come on with engine started
Fault diagnosisDay lights do not come on with engine started

DAY LIGHTS DO NOT COME ON WITH ENGINE STARTED

1.2 8v, 1.3 Multijet, 1.4 16v

The DRL device turns the daylight lights on when the key is turned to the MAR position or the engine is started. This control can be excluded when the lights control lever is turned to any other position than OFF.

The two bulbs are positioned in the front additional headlamp.

Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation

Check that the lighting stalk is in the OFF position.

Check that the DRL function has not been disabled by the user on the Control Panel.

Check that the proxy settings for the DRL operation are correct

Move on to Step 1

1. Steering wheel interface lever in incorrect position

2. DRL function disabled by user

3. DRL function proxy settings not set

1. Place the steering wheel interface lever in the correct position.

2. Re-enable the DRL function correctly.

3. Set the correct proxy settings for the DRL function.

1CHECK USING THE EXAMINERAll OKProblems encounteredOperation
Connect an Examiner to the Body Computer and check that there are no errorsMove on to Step 2Presence of errorsContinue as instructed by the diagnostic equipment
2LIGHTING STALK CHECKAll OKProblems encounteredOperation
Check that the lighting stalk works correctlyMove on to Step 3Lighting stalk faulty.

Replace the steering column interface

Op. 5550A10 STALK UNIT ASSEMBLY - R+R

3WIRING CHECKAll OKProblems encounteredOperation
Check the continuity of the wiring between the DRL lights and the Body ComputerMove on to Step 4Wiring brokenRestore correct wiring.
4BODY COMPUTER OPERATION CHECKAll OKProblems encounteredOperation
Check that the body computer is working properlyEnd of diagnosisBody Computer defective.

Replace Body Computer

Op. 5505A32 BODY COMPUTER - R.R

Parts & tools for this job For 2007 Fiat 500

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