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Central locking behaving strangely

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I am not sure of the exact operation of a 2005 Cayenne so looking to this board for advice on whether this mode of operation is as per design or actually a fault.


The issue I have is when I unlock the car using the remote keyfob, all doors open as expected but when I lock the doors, it appears that all doors lock except the tailgate (glass and main lid)  I can still open these doors for a short time after the main car is locked. Then if I do go ahead and open either of the tailgate doors, the hazard lights start flashing but no audio alert as if to inform me that the car has been broken into.  


If I leave the car for a while after I lock the car then I can no longer open the tailgate so clearly the system is working but not as I expect it to.


Is this as per design or actually a fault?

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Not 100% sure as my key fob batter died and I now operate manually but the operation above sounds like when you lock, it is not locking at all.  If you can "still open doors for a short time" then it is not locked, locking is immediate.   I too find when I leave it unlocked opening some doors after a time will trigger hazard lights flashing but when I leave it unlocked it stays unlocked. 

I think your issue is when you lock it it does not lock, and when it remains unlocked it locks on it's own.  The hazard lights are normal when opening after system goes to sleep.

I hope this helps.

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Hi, where can I obtain a wiring diagram for the tailgate, switches and sensors please? I think I have a serious electrical problem which prevents me from using the internal tailgate release switch and the remote control but the button on the tailgate appears to work fine as does the glass section.

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Thank you Rick150, this diagram appears to be centred around the Rear Window Button and Rear Window Handle Push Button. Is there also a diagram that shows the rear tailgate lid and the connection to the internal release button on the drivers door?

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Thank you Rick150, I can't quite make out some of the areas in the diagram, is it possible to show where the tail lid connections are?

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