2427568 - K90 INSTRUMENT LIGHTS / NOT WORKING

With the key in the ON position and the side lights on, the instrument panel does not light up
the side lights are working properly
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
With the ignition ON, check that the side lights come on correctly using the steering column switch unitContinue to Step 1Not even the side lights are workingSee table   I08 
1CHECK 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 5Impossible to connect with the Instrument Panel control unit.Continue to Step 2
There are errorsContinue in accordance with the instructions for the diagnostic equipment
2ELECTRIC 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 faultyReplace the component involved (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 See   E4010  INSTRUMENT PANEL Continue to Step 4Electrical connections not workingRestore damaged electrical connections.
4CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check whether it is possible to connect with the Instrument Panel Node.Continue to Step 6Impossible to connect with the Instrument Panel control unit.Replace the instrument panel Op. 5560B11
5CHECK WITH ACTIVE DIAGNOSISAll OKProblems metOperation
With the Examiner in the Instrument Panel Node ambient, check, in active diagnosis, that the instrument panel lighting is correctly activatedContinue to Step 6The panel lighting is not activatedReplace the instrument panel Op. 5560B11
6CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check, in the Body Computer Node ambient, that there are no errors and the lighting parameter variesContinue to Step 1Impossible to connect with the Body Computer control unitContinue to Step 7
There are errorsContinue in accordance with the instructions for the diagnostic equipment
The parameter values do not changeContinue to Step 10
7ELECTRIC POWER SUPPLY CHECKAll OKProblems metOperation
Check that the Body Computer Node electrical power supply is correctContinue to Step 8Positive and/or earth electrical power supply fault. Replace the defective component (if a fuse is involved, search for the cause of the problem).
8CHECK ON CONNECTIONSAll OKProblems metOperation
Check the continuity of the wiring between the control panel and the Body Computer Node See   E4010  INSTRUMENT PANEL Continue to Step 9Electrical connections not workingRestore damaged electrical connections. See   E4010  INSTRUMENT PANEL
9CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Using the Examiner, check the possibility of connecting with the Body Computer NodeContinue to Step 6Impossible to connect with the Body Computer control unitReplace the Body Computer Node Op. 5505A32
10CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer present End of diagnosisThe fault persists.Continue to Step 1