Did you test both doors?

Yes. Tomorrow I'll shoot a video and show you what alarm is doing.

what model no. Is your immobiliser as I have the exact symptoms. Had to reverse polarity on the keyfob to get it to unlock/lock but as soon as immobiliser kicks in nothing. Key only opens drivers door until I put key in and turn ignition on then I can use key to unlock rest of the system or remote

M535. The key fob will lock and unlock the car fine for about the 1st 30 seconds. Then when the alarm arms it won't do it anymore. However, when you press unlock, it does light the door lights and the dash lights. When you unlock it manually with the key and open the door the alarm goes off until you turn the ignition on.

http://i1303.photobucket.com/albums/...psgzfworkt.jpg

That's the long list of codes my immobilizer is throwing. Durametric won't clear them so I have no idea which ones are still an issue, and I don't have access to durametric. I had my Indy shop pull the codes the last time they worked on it.

What sticks in my mind is that we both have the exact same issue and that we have to reverse polarity on the lock / unlock. If you sit in the car with and open all the doors do they lock as soon as you start the car mine does ( not sure if it's supposed to though )

Do you also have an M535?

No mine is a m543 looking at the wiring diagram and am wondering what and why are the key contacts reversed

only drivers door has key

So, you have the same behavior with the new immobilizer, Craig?
That points to something on the car being wrong. Probably door latch issues. I still think you both have bad door latches (probably on both doors).

Also, the connectors in the door frames are known points of failure. Moisture can get in and corrode the pins/sockets. They can be cleaned with contact cleaner.

yes same issues with new immobiliser not had chance to dig any further with car other than test that I get an earth at clu when turning key for lock/unlock

I haven't taken the passenger side apart yet, but the drivers side on my car wasn't corroded at all.

Does every one else's lock as soon as you turn ignition on

I've never noticed. I'll have to check.

Spoken to a couple of owners and theirs does not lock as soon as you turn ignition on. Also mk4 golf share same locks as early boxster however not confirmed this

I can confirm it is a VW part. It has a VW of France stamp right on it. I don't think it's a MK4 part though, they wouldn't have a window drop switch.

Also, my car does not lock when the ignition is turned on, but it does lock itself while being driven.

Is there a part no. That you can cross reference as the golf ones are £18 brand new

Did some googling. It's not the same. Very similar though. I found this:


VWVortex.com - MKIV door locks explained - why you're having problems!!! :(

The mechanism I replaced is still sitting on my workbench, so I took it apart. Tested all the microswitches in it, and they all worked fine. The circuit board is covered in some sort of orange glue. My guess would, it was a fix VW rolled out to address exactly what he found. Broken solder connections. For fun I'm going to resolder the whole board and test it. What could it hurt? May do the same on the passenger side.

Well that's 1 issue cleared locking doors when ignition on is a dealer option