2751126 - S74 NOISY' SUNROOF

The sun roof is noisy during opening/closing and/or whilst driving
Results of the tests
0PRELIMINARY CHECKAll OKProblems metOperation
Check that the noise only occurs during the opening/closing of the roof and is not there whilst driving with the roof closed.Continue to Step 2The noise is also present whilst driving with the roof closed.Continue to Step 1
1PROFILE CHECKAll OKProblems metOperation
Check that the profile between the front moving glass and the rear fixed glass is correctContinue to Step 2Profile not correctRestore correct coupling
2SLIDES CHECKAll OKProblems metOperation

Check the condition of the slides; in particular, make sure that:

  • there are no obstacles or impediments to the movement of the slides
  • the splining on the slides are properly greased
  • the matching between the splining and the pins for the hinged opening is correct
Continue to Step 3Presence of impediments/obstaclesRestore correct operation
Splining not greasedGrease the splining
Faulty match between slide componentsRestore correct operation, if necessary, replace the damaged slide
3MOTOR TIGHTENING CHECKAll OKProblems metOperation
Check that the bolts fixing the motor are correctly tightened using a torque wrenchContinue to Step 4Tightening not correct/incompleteTighten the bolts to the correct torque
4MOVEMENT CONTROL CONDITION CHECKAll OKProblems metOperation
Check the condition of the control racks and the motor ring gearContinue to Step 5Rack faultyRestore correct operation, if necessary replace the rack Op. 7030B45
Motor ring gear faultyRestore correct operation, if necessary replace the motor Op.   7030B70 
5CHECK ON CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsReplace the sun roof electric motor Op.   7030B70