I am a new owner of a 06 xc90 for a while we were opeming toe drivers side door and alarm goes off. we were thinking just trying to open the door activates alarm. Come to find out when we lock doors with key fob all doors lock but drivers door lock locks then instantly unlocks itself. So we press lock on key fob all doors lock leaving the drivers door unlocked. if you open the door it does open but sounds alarm.

any ideas???

thanks in advance!

Harrison

 

Usually that is a bad door latch assembly.

 

Power door locks (also known as electric door locks or central locking) allow the driver or front passenger to simultaneously lock or unlock all the doors of an automobile or truck, by pressing a button or flipping a switch.
Power door locks were introduced on the luxury Scripps-Booth in 1914, but were not common on luxury cars until reintroduced them in 1956. Nearly every car model today offers this feature as at least optional equipment.
Early systems locked and unlocked only the car doors. Many cars today also feature systems which can unlock such things as theluggage compartment or fuel filler cap door.
It is also common on modern cars for the locks to activate automatically when the car is put into gear or reaches a certain speed. Automatic unlocking when the car is parked is usually also featured on such systems.
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