Keyless locking fault

[Artist]

I have a 2012 Focus Titanium Estate 1.0l ecoboost. I am have a problem with the keyless locking system. The key fobs work perfectly for unlocking and locking the car. I can unlock the car by touching any door handle. When I touch the driver's door pad to lock the car nothing happens. When I touch the passenger's door pad it single locks the doors, but a second touch within the time limit doesn't double lock the doors. Can anyone offer advice? 

[alexp999]

Are you making sure to not put your hand around the handle when you touch the button?

[Artist]

Hi alex999,

Yes, I only touch the button. I have had the car since new (2012) and fault has only occurred in the last 2 weeks. I am trying to find out where the Central Locking Control Unit is in my car as I have read that static can build up in this unit, but if unplugged for an hour then this cures some problems within the central locking system. Worth a try I thought. I think it is a green unit under the trim in the passenger foot well. There is a blue cover over this unit which releases the plug. There is also a square grey plug/socket along side it, which I believe should be unplugged as well. 

[alexp999]

You could always try disconnecting the battery for a bit.

[Artist]

I think I would need to get a gadget that stores the car's computer settings/codes before I do this, but thanks for your suggestions, much appreciated.

[alexp999]

No radio code to worry about.

Shouldn't loose any radio settings, clock just might need resetting if you don't have GPS.

[Artist]

As the remote fob works fine I will try disconnecting the battery when I know I am not going to need the car for a day or 2. I have charged the car's battery in case it was low and I have changed the battery in my fob. No joy with either. Will keep you posted. Thanks for all your help.