2751054 - I20 FOG LIGHTS NOT WORKING

When the front fog lamps switch is operated with the side lights on, the front fog lamps do not work.
Results of the tests
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the Examiner to the diagnostic socketCheck that there are no faults in the Body ComputerCheck light operation while in active diagnosis modeContinue to Step 2Fog lamp relay error Continue to Step 3
Fog lamp relay error Continue to Step 2
2CHECK ON INDIVIDUAL LIGHTSAll OKProblems metOperation
Check the condition of individual bulbs and lampsContinue to Step 3Bulb damagedChange the bulb Op.   5540D14 
Fog light faultyRepair or replace the front fog lamp Op.   5540D10 
3CHECK FOG LAMP ELECTRIC CIRCUITAll OKProblems metOperation

Check, in order:

  • front fog lamp fuse
  • front fog lights relay
  • Engine bay control unit power supply
  • connections between Body Computer and engine bay control unit;
  • connections between engine bay control unit and bulbs;
  • connections between Body Computer and fog lights switch;
  • bulb earth See E2030 FOG LIGHTS
Continue to Step 4Connections brokenReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore the connections See E2030 FOG LIGHTS
4CHECK ON FRONT FOG LAMPS SWITCHAll OKProblems metOperation
Check the operation of the fog lights switch See E2030 FOG LIGHTS Continue to Step 5Fog lights switch faultyReplace the fog light switch Op. 5540D18
5CHECK ON BODY COMPUTERAll OKProblems metOperation
Check that the Body Computer is working properly, in particular the front fog lamps control functionContinue to Step 6Device not workingReplace the Body Computer Op.   5505A32 
6Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis.