L322 4.4 Petrol: Remote Locking Fault

I have a very weird remote central locking fault.

It all started when I opened the tailgate and closed it again. When I came to lock the car, the remote fob didn't work. So I opened and closed the tailgate again and the remote worked. This continued over a few days with problem clearly related to opening and closing the tailgate.

However eventually the remote would not work at all. But the central locking worked fine on both stages if I used the key in the drivers door lock.

So I reprogrammed the keys. And hay presto, the remotes worked. Until that is, I came to open the tailgate again. Opening and closing it knocked the remote function out, almost every time but, not every time! I continued for another week reprogramming the keys after having used the tailgate.

Now however, I can't even reprogram the keys. I've also done a BCU reset and still no joy. Finally I've had the boot trims off and can't see any broken wires. I've also replaced the upper tailgate latch with a known good one, thinking it might be giving a strange signal to the BCU. However no change.

Has anyone experienced this problem before. Any advice as to where I should look next?

Thanks for your help.

James

what error codes have you got? do you have a start button or start with the key? does the car start?

The car startss and drives fine. It s a 2003 model so has a key. I don't have a code reader.