125000576 - K100 MIL WARNING LIGHT DOES NOT WORK

With key on, the MIL warning light does not come on;
The MIL warning light is turned on via a direct earth control supplied by the Engine Management Node; When everything is working normall, the MIL warning light should come on with the ignition on and go out once the engine has started;
Results of the tests
1CHECK WITH DIAGNOSTIC EQUIPMENTAll OKProblems metOperation
Connect the diagnostic equipment to the diagnostic socket and check the operation of the MIL warning light at the engine management node through active diagnosis.Continue to Step 5The warning light does not come onContinue to Step 2
2WARNING LIGHT OPERATION CHECKAll OKProblems metOperation
Check that the MIL warning light is working See    See E4010 INSTRUMENT PANELContinue to Step 5The warning light does not come onContinue to Step 3
3ELECTRICAL EQUIPMENT CHECKAll OKProblems metOperation
Check the continuity and the insulation of the wires between the engine control node and the instrument panel node. See    See E4010 INSTRUMENT PANELContinue to Step 4Cable brokenRenew the electrical connections See    See E4010 INSTRUMENT PANEL
4INSTRUMENT PANEL REPLACEMENTAll OKProblems metOperation
Replace instrument panel Op.    Op. 5560B11 ANALOGUE CONTROL PANEL - R+R OR REPLACEEnd of diagnosis.
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
1.9 JTD 16VCheck that the fault is no longer presentEnd of diagnosisFault persistsReplace the engine management control unit Op.    Op. 1060G80 DS ELECTRIC INJECTION CONTROL UNIT - R R
2.0 JTSCheck that the fault is no longer presentEnd of diagnosisFault persistsReplace the engine management control unit Op. 1056F82
3.2 V6Check that the fault is no longer presentEnd of diagnosisFault persistsReplace the engine management control unit Op. 1056B82