Question about 2000 Volvo S80

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Arlarm going off

Why doesalarm sounds after locking doors?

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The Central Electronics module is detecting a fault in on of the door locks. Its not necessary that the lock is faulty, it may just need to be adjusted. To be more specific, the locking knob that goes up when vehicle is unlocked and goes down when locked , is connected via a linkage to a microswitch on the door lock actuator. The microswitch has three positions. top position is unlocked, center is neutral, bottom is locked. However after any cycle of the lock/unlock switch, the microswitch has to return to the neutral position for it function correctly. Most likely your vehicles drivers door lock microswitch does not return to the center/neutral position after you lock you car which causes the alarm to go off. In this case you should have the drivers door lock assembly replaced by a good knowledgeable workshop, and the dealer isnt one of them.

Posted on Dec 15, 2008

  • June Grenier
    June Grenier Mar 18, 2011

    makes total sense because I was not able to unlock or lock the door with my key.



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