3233081 - K20 FUEL LEVEL GAUGE NOT WORKING

With the ignition key in the ON position, the fuel gauge indicator is not working properly (it indicates a different level from what is actually in the tank)
Results of the tests
1CHECKING CENTRAL INSTRUMENT ELECTRICAL CIRCUITAll OKProblems metOperation

Check:

  • Connection between the fuel gauge and the central instrument
  • service fuse
  • ignition-operated service fuse
  • central instrument power supply
  • central instrument earth
( See   E4023  DASHBOARD CENTRE AUXILIARY EQUIPMENT() ). 		Continue to Step 2 Component defectiveReplace the component involved (if a fuse is involved, search for the cause of the problem)
Connections brokenRestore the connections (
2FUEL GAUGE CHECKAll OKProblems metOperation
Check the operation of the fuel gauge. Continue to Step 3 Sender unit defective Replace the sender unit inside the fuel pump Op.   1040A70 
3CHECKING CENTRAL INSTRUMENTAll OKProblems metOperation
Check the central instrument is working properly, particularly the fuel level signal check device see DESCRIPTION AND OPERATION: 5560 INSTRUMENT PANEL Continue to Step 4 Device not working Change the central instrument Op.   5560C51 
4CHECK CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'