Strange central locking problem

[Beeza]

My car has an odd problem with the driver's door lock.

I have set the comfort settings to unlock all doors at once. When I plip the remote, the other three doors except the driver's door unlock. I have to plip the remote another three times to unlock the driver's door!

However once it has been opened it will lock and unlock every time you plip the remote. If I leave the car locked for some time and come back to unlock it, the driver's door will not unlock first time again and I have to plip the remote in total four times to unlock the drivers door.

[wvicary]

Can you hear the drivers door lock trying to operate when this occurs or is it silent then suddenly works on the fourth try? Does it always unlock when using the key?

[Beeza]

When I unlock it for the first time it sounds more like a click. After the fourth press of the remote you can hear the locking motor "whirr" and you can open the door.

I've actually removed the locking mechanism and cleaned it up and lubricated it with a generous dose of WD40. Quite a job in itself as you have to de-rivet the inner door panel. I get exactly the same problem as before. I am suspecting the locking mechanism, but it all seems to work okay. It's just when I leave the car locked for a period of time, it doesn't unlock first time.

I was thinking about replacing the lock. Pelican parts list it for around $77, but I want to make sure that there might be some spurious programming by computer that also might cause this. I don't have access to PIWIS tester or Duratech either.

[wvicary]

I would replace the lock motor. It sounds more like a mechanical problem then programming. Please post back with your results so we may all learn from this.