There is now plenty of information available about the total loss of central locking facilities after the main battery is disconnected for any reason. It seems this affects X250 Facelift XF models. Below is a copy of my post on a Facebook site following my personal experiences. It seems Jaguar are refusing to take ownership of this software fault and are charging a fortune to replace components that should be done FOC. If you have this problem and take your car to a Jaguar dealership, be prepared for a large bill. Contact one of the companies in my post and the problem will be solved at a reasonable cost and in minutes.
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A job on the car last week needed the battery disconnecting for the duration. It was reconnected about 30 hours later. All of my central locking function was gone. Pressing the lock button on the remote or any door handle button gave an immediate 2 beep fault.. The interior lock & unlock buttons did't work either. Forum & social media research showed this to be a fairly common problem following a battery disconnection. A problem that Jaguar dealer workshops seem to be oblivious of. There are several instances where dealers have had cars several days and ended up replacing modules at big cost to owners.
It transpires that an Autologic diagnostic tool can fix the problem in 10 minutes. Most Jaguar workshops & many independents apparently don't have this kit.
For the information of all unlucky enough to suffer this problem I have found 2 places that have the kit, know of the problem and have fixed many cars.
In Coalville Leicester
MDM Services
Unit 4 Stephenson Industrial Estate
Coalville, Leicester
LE67 3HP
01530 838666
In Milton Keynes,
E & E Services MK Ltd
38 Tanners Drive
Blakelands
Milton Keynes
MK14 5BW
01908 218 875
I went to MDM in Coalville yesterday,176 mile round trip. They connected up their machine and the problem was was solved in a 10 minutes and a few button presses. They charged me £50. Bargain.
I understand from other posts that E & E charge £90. A bit cheeky, but fixes the problem.
Talking to the technician yesterday they don't know why this happens, what makes it happen or how to stop it happening. They think that the less time the battery is off the less likely it is to happen.
I hope this info helps anyone in a similar position.
(This has nothing to do with the other well known problem of failing door lock mechanisms.)