Hi everybody,
From today, driver's door of my XJ8 4.2 of 2004 doesn't open when using the fob. When doubleclicking, other doors and trunk open so that I can get in, open driver's door from the inside, start and drive the car, and lock it again (simple or double click) when out. But when trying to reopen, same story, doesn't work!
This happened after I changed the battery, but I took care of putting another small battery in parallel during the change operation (took me some time to do it properly) so that never I lost voltage, touchscreen and radio kept alive.
Would it be a relay sticking (which one and where)? Shoule I reset some systems (which ones)? Anybody has a clue?
Thanks in advance for your help

 

Up!
I have looked for threads in the forum but haven't found a similar issue.
I don't have experience of this car and am not sufficiently DIY to embark on a fix without knowing where to start with.
Could you please give me advices on what could be the most likely cause of the issue: mechanical (within the door, needing to disassemble the door panels), or electrical ( a switch or a fuse, and where could it be located)?
Please help

 

Hi, paydase,
I wonder if it's the fob that is going "off"?
Here is a thread you may find of interest..

https://www.jaguarforums.com/forum/x...locking-93294/

I have read that there was an issue with the backing inside the fob that needed fixed so it could well be the fob.
You've probably had a good fiddle but I would then look at the door lock and especially the internal locking.
On the fob itself, if you don't hear an actual clear clean crisp click, then the fob could be to blame.
Be patient though, one of the other technological whizzes will be a round to help soon.
I wouldn't go taking the door to bits just now, it may sound silly but do you have another fob, it's worth a try to see if that works?
The price of a battery and fixing a fob could work out?
I wish you luck and will post again, if I can help?
Keep the Faith, Bon-chance and Regards, Stu

 

Thx Stuart, good advice, silly I didn't think of using the second fob I have, maybe that, I'll check tonight and will come back to report.

 

Good Luck
Was there anything at all that you remember could be a pointer as well.
I am thinking of a blown fuse

 

I thought of a possible blown fuse also but didn't investigate further at that point. As I said above, the issue arose just after changing my battery but I was careful not to loose voltage during the whole operation. The car was also left with open doors during a long time and I also forced shutting the trunk lights during the operation by pushing the lid mechanism while opened. Voltage was apparently kept during the whole operation. At the end, the car was normally closed (double click with the fob). Nothing else that I can remember. Thx for you help Stuart.

 

Hi Serge,
I would check the fuses relating to the drivers door first.

Disconnect the battery completely, making sure you have the radio code at hand, leave it for 10 minutes and go have a cup of coffee. Reconnect the battery and start again.

 

Thx Jim, I will do that tonight after trying the second fob.
Btw, in which fusebox are located the relevant fuses and what are their numbers?

 

Sorry Serge, I don't know but it will be in your manual. If you don't have a manual then search this forum and you should be able to download one for free at the following link.

http://api.viglink.com/api/click?for...13740640646107

 

OK, I'll do my homework.
Just to be sure: you recommend disconnecting the battery and zeroing all remaining parasitic voltages. Is this not going to lead to some other gremlins? I know that you have to reset a number of devices (radio, handbrake, window motors, etc.) and then rune the car for some time and this is why I ensured keeping voltage during my battery replacement. But If fob and fuse checks don't make it I will go along your advice.

 

You'll be fine, just take the negative lead off first.

 

Good Luck Serge!
Stu

 

Have looked to the description of fuses in the driver's handbook (122 fuses in 3 fuse boxes!). Seems that, if a fuse, would be F13 (20 Amps) in the cabin fusebox. Problem I see is that it not only protects the door's locks but also the Rear Electronic Module. Dunno what the REM stands for but I would be surprised other issues would not have surfaced. I'll check fob and fuses tonight.

 

So I checked the second fob, doesn't work better. Both fobs are able to wake up the car (lights in, outside mirrors in motion) but no front door opening when single clicking. When double clicking, passenger door and back doors open. Closing the car works also.
I will not try anything else at this stage as I have to make a long trip with the car tomorrow and at least I'm able to drive it, will try to fix the issue when arrived in a couple of days.
As I doubt the issue could be the F13 fuse (because it seems to protect all doors mechanisms and the REM) I tend to think it could be of mechanical nature (in the door) or a switch. Where could such a switch be? Any other idea?

 

The switches will be attached to the door lock mechanism.

 

I have repaired both rear door latches. In my case they both failed open and would not lock.

The fault was due to the micro switch in the actuator. This micro switch is not

available on its own.

The latches are stamped FORD and I used a used latch from an 2005 Mondeo.

Plenty of used Ford latches available and very cheap.

Now the driver's door is a bit more involved because there are two more

microswitches associated with the lock and because I haven't had the driver's

door to bits, I cannot tell you where they are and would like to know!

If you want to tackle this problem I would suggest dismantling the door and

replacing the latch as a first step.

Let us know how you get on and what you find.

Cheers

 

Thanks for the tip of the Ford parts.
I found a drawing of the door parts in the Parts List and Diagrams file provided by JimC64 in the 'How to' section. Indeed the switch system in the driver's door seems to be a complex part. I'll try to dismantle the door panel and look at it.

 

Hi Serge, I wish you luck as I've never had the door off an X Type, hope you and Meirion1 can both get sorted.
Stu

 

The fix for this is to replace the latch mechanism. You can get either a new or used part. I had this problem a few years ago and got a used part since these parts are pretty durable and failure is unusual.

 

I think oldmots is correct. I went thru this with my '05 VDP passenger door. Door panel is easy to get off; however, upon seeing all the linkage inside, I personally wasn't comfortable with repairing it myself. Took it to a mechanic. Good luck.