2398869 - K146 ONE WARNING LIGHT OPERATED BY CONTROL PANEL ON CONSTANTLY

If the lights/heated rear window are switched off from the switch panel unit, the relevant warning light on the instrument panel does not go out

The warning lights switched on from the switch panel unit are:

  • Front fog lights (left switch panel)
  • Rear fog lights (left switch panel)
  • Hazard warning lights (climate controls switch panel unit)
  • Heated rear window (left switch panel)
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
With the ignition OFF, switch the hazard lights on and off and check that they come on/go out.

With the ignition on, switch on and off from the left switch panel all the functions in question, namely:

  • front fog lights
  • rear fog lights
  • heated rear window
and check that they come on/go out
Continue to Step 1The hazard warning lights do not workContinue as instructed See table   I39  TURN SIGNALS DO NOT WORK WHEN HAZARD KEY IS PRESSED
The front fog lights do not workContinue as instructed See table   I20  FOG LIGHTS NOT WORKING
The rear fog lights do not workContinue as instructed See table   I21  REAR FOG LAMPS NOT WORKING
The heated rear window does not workContinue as instructed See table   J21  HEATED REAR WINDSCREEN NOT WORKING
1CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner check, in the Instrument Panel Node ambient, that there are no errors and the following parameters are present. Continue to Step 2There are errorsContinue in accordance with the instructions for the diagnostic equipment
2ELECTRICAL POWER SUPPLY CHECKAll OKProblems metOperation
Check that the Instrument Panel Node electrical power supply is correct. Continue to Step 3Positive and/or earth electrical power supply fault. Replace the defective component (if a fuse is involved, search for the cause of the problem).
3CHECK ELECTRICAL CONNECTIONSAll OKProblems metOperation
Check the electrical connections between the Body Computer and the Instrument Panel, in particular that each individual pin is correctly connected.Continue to Step 4Electrical connections not working.Restore damaged electrical connections.
4CHECK WITH ACTIVE DIAGNOSISAll OKProblems metOperation
With the Examiner in the Instrument Panel Node ambient, check, in active diagnosis, that the warning lights in question are correctly activated Continue to Step 5The warning lights do not flashReplace the instrument panel Op. 5060B11
5CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check, in the Body Computer Node ambient, that there are no errors and that the warning light status varies Continue to Step 6Impossible to connect with the Body Computer control unit.Continue to Step 6
Errors present. Continue in accordance with the instructions for the diagnostic equipment.
The parameter values do not changeContinue to Step 8
6ELECTRICAL POWER SUPPLY CHECKAll OKProblems metOperation
Check that the Body Computer Node electrical power supply is correct.Continue to Step 7Positive and/or earth electrical power supply fault. Replace the defective component (if a fuse is involved, search for the cause of the problem).
7CHECKING WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check the possibility of connecting with the Body Computer Node. Continue to Step 5Impossible to connect with the Body Computer control unit.Replace the Body Computer Op.   5505A32 
8CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisThe fault persistsReplace the Body Computer Op.   5505A32