Do you have a bidirectional scanner? With the likes of Foxwell 510 you can activate button presses from the scanner and also confirm if a button is getting pressed.

Often when the central lock button is not working it’s because the car is seeing some sensor that precludes the doors locking. Example: you cannot central lock with driver’s door open.

While in the car, lock with key fob then see if you can unlock. Don’t take too long you’ll set off the motion alarm.

Doors are double locked from key fob so you can’t pull handle to open door to have to hold central lock button to disable the double lock.

So the test: lock with key the door handle should do nothing (dry fire).

Then hold central lock button and try the door handle again.

If you can unlock door with handle the central lock button and the hardware that it runs is functional.

When mine malfunctioned it was the upper hatch button that shortened out from rain.

The car will disable the hatch button if it’s shorted but my central lock button stopped working until I removed the damaged rubber cover from the hatch button.

(Foxwell told me the button was always pressed)


–awr–

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)