Hello,
My name is Guillaume, 22 years old and I'm a proud owner of a LHD 2002 Jaguar S-type 2.5V6. I'm from Belgium.
The Jag is such a wonderful car to drive. I use it as a daily to get to work. I first got the Jag in september 2021.

Since last year november, the aircon/heating stopped working. There's no air blowing through the system.
Since then I also have a clicking noise in the left front door and a notification on the dash saying my front right passenger door is open, which is untrue as it is physically closed. Whenever I turn the aircon/heating module on. The locks on the right side open and close sometimes when driving, and when the climate control module is on. When driving normal highway speeds (120km/h or 60MPH), there is some ram air flowing through. The temperature control does work normally. I believe the clicking, locks openingand closing are caused by a short circuit?

I tried to fix it by replacing the module itself, but that was no success. The problem still occurs.
The Jaguar dealership suspects that the blower motor and resistor have failed.

What can I do to fix this issue? I am a bit worried that if I can't get it fixed, mold will start to appear as there's no dry air flowing into the cabin.

Thank you!

 

Why don't you change the blower motor like the dealer suggested?
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They explained that they don't have the necessary equipment for the S-type to be 100% sure about it.
They said they would need 6 hours to diagnose the problem, and even then they can't guarantee if they can fix it.

 

The door indication message does not actually look at the door position, meaning open or closed. It comes from the latch mechanism, meaning latched or unlatched. For whatever reason, the warning system thinks that door is unlatched. There's a switch in the latch mechanism for this purpose.

At first I thought you had two separate problems, but then I read this next part:

Are you saying the door warning message is only present when the heat/AC system is on? If you switch the panel off, does the door warning message go away? If so, that's a really odd situation. Wiring diagrams are here. See figure 06.1 for the climate control, and 12.1 for the locking system:

JagRepair.com - Jaguar Repair Information Resource


The blower fan doesn't work under any circumstances, right? Check fuse F16 under the hood. If that's good, locate relay R10 in the same panel. Place your finger on the relay and have a helper turn the key to the ON position (engine does not need to be running) and manually select high speed for the fan. You should feel the relay click, which tells us the controller is sending the command for the fan to run.


Which module? The AC module or something for the door latches?

 

Yes so the door message only appears when turning on the climate control unit. When I turn it off again, the message goes away.
I don't know if I can post videos here, but I have a video, which I'm willing to send, of what's happening whenever I try to use the aircon/heating.

Blower fan does not work in any circumstances no. At rare occasions, it works normally as if the issue never appeared, but like I said, on very rare occasions.

The module I replaced is the climate control unit. I replaced it because when I checked the fuse for it, the amps went on and off constantly.

 

Edit: see posts 8 & 9 for important details as this appears to be a post-facelift model.

Some more thoughts. I am wondering if two wires are making contact inside a wiring bundle. One wire from the fan circuit, and the other from the door indication circuit. When you turn on the fan, the door indication circuit mistakenly thinks the door is not latched.

Did you check fuse F16 yet? If good, try removing it for troubleshooting. This will disable the fan. Turn on the climate control system. The fan obviously won't run, but the rest of the climate control system should. See if the door message returns.

If now good, reinstall the fuse and remove relay R10 under the hood. Turn on the climate control system. Once again, the fan won't run, but see if the door message returns. Pulling the relay instead of the fuse energizes a portion of the fan circuit, and might help isolate the location of the fault.

If still good, reinstall the relay. Disconnect the wiring harness from the fan motor and turn on the climate control system. This should be a connector with two wires. As before, the fan won't run, but we're expanding how much of the fan circuit is active.

The last step is to reconnect the harness to the fan motor, and disconnect the fan controller. I think this is a connector with five wires. Any difference?

 

You can't post the video directly here, you will need to upload it to YouTube or some similar site and link from there.

 

by 2002 he means 2002.5 so people don’t get confused

 

Ooh, that makes a yuge difference. Same general concepts, but the fuses and relays are different.

If this is a post-facelift model, the fuse to check is F10 in the trunk. If the fuse is good, investigate relay R7 in the trunk. Same troubleshooting idea as above, try pulling this fuse and see if that makes any difference with the door warning message. If that helps, reinstall the fuse and pull the relay. Remember, these are in the trunk, not under the hood.

As far as pulling the connector at the blower motor, it appears the fan controller is part of the motor assembly. I'm not sure if the fan and controller can be isolated for testing.

To be sure we're looking at the correct year wiring diagram, what is the shape of the fuse panel in the trunk? It's in the spare tire well, so you'll have to lift up the floor panel for access. On pre-facelift cars, it's a rectangular shape. On post-facelift cars, it's curved, basically half of a crescent moon shape.

 

This is indeed the 2002.5 model, so the first facelift, not the pre-facelift model. The fusebox in the book by the spare wheel is curved.