184000454 - I39 TURN SIGNALS DO NOT WORK WHEN HAZARD KEY IS PRESSED

The hazard warning lights do not work when the button is pressed
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Press the hazard warning lights switch in the control panel and check that the direction indicators/hazard warning lights are activated and deactivatedWith the ignition ON, using the special lever, check that the left/right direction indicators are activatedEnd of diagnosisHazard warning lights faultyContinue to Step 4
Direction indicators controlled by the stalk unit faultyContinue to Step 1
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the Examiner to the diagnostic socket

Check:

  • that there are no faults in the Body Computer
  • the operation of the lights in active diagnosis.
Continue to Step 4Body Computer faultyContinue according to the instructions for the diagnostic equipment
Some of the bulbs do not come onContinue to Step 3
None of the bulbs manages to come onContinue to Step 2
2DIRECTION INDICATORS ELECTRICAL CIRCUIT CHECKAll OKProblems metOperation

Check, in order:

  • connections between steering column switch unit and Body Computer;
  • connections between Body Computer and bulbs
  • bulb earth See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
Continue to Step 3Defective componentReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore the connections See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
3CHECK ON INDIVIDUAL LIGHTSAll OKProblems metOperation
Check the condition of the individual defective bulbs and the light clustersContinue to Step 4Front bulb damagedChange the bulb Op. 5550C18
Damaged rear bulbChange the bulb Op. 5550C26
Side repeater damagedReplace the side repeater Op. 5550C22
Rear light cluster faultyChange light Op. 5540A44
Left light cluster faultyReplace the light cluster Op. 5540B78
Right light cluster faultyReplace the light cluster Op. 5540B79
4HAZARD WARNING LIGHTS SWITCH CHECKAll OKProblems metOperation
Check that the hazard warning lights switch in the control panel is working properlyContinue to Step 5Switch not working properlyReplace the hazard warning lights switch Op. 5550C14
5CHECK ON BODY COMPUTER SUPPLYAll OKProblems metOperation
Check that the Body Computer is supplied correctlyContinue to Step 6Incorrect supplyRestore the correct supply See E2020 DIRECTION INDICATORS / HAZARD WARNING LIGHTS
6CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsReplace the Body Computer Op. 5505A32