Hi all, my first post /question.
I just bought this car, a 2003 X Type in very nice shape on ebay. It looked real good when I met the owner, so paid him cash, as I drove away I soon realized I had some real trouble. When I switched on the A/C, it was only blowing hot air. It has the nav panel, but none of the climate control functions would work except on/off. I bought a used module for cheap, now I could select what I wanted but still only blows hot. The compressor and clutch work and the charge is full and the lines get ice cold but still only hot air in the cabin. I heard if the CCM goes bad it fries the heater control valve, so that's where I will look next. But I have no idea where it is or how to access it. This car is in S.Florida so any help will be greatly appreciated.
Thanks, Jack

 

Could also be the Air Temperature Flap not operating - either the stepper motor has failed, the flap has come loose from the motor or a fuse is out.

You could also try the stepper motor reset procedure:

• Select full cooling -Lo
• Select full heating - Hi
• Back to full cooling
• Select face followed by floor
• Then select face again

• Finally select defrost

 

Yes, as astromorg said, sounds like the Damper/flapper is stuck iin the Heat postion (I believe it is an intended default to be in HEAT) So maybe the reset procedure will work

FYI..Engine Coolant always circulates through the Heater core..there is no vlave..Air flow flaps is what changes from Heat to Cool.

 

Thank you very much, I will give it a try.
Disconnecting the battery can affect this?

 

Yes, disconnecting the battery for at least two minutes will prompt the stepper motors to recalibrate, but you also lose the window settings, radio (UK only, usually) and engine idle parameters that reset themselves eventually.
By going through the routine above, with the A/C running, you get to hear exactly what's going on - or not! - as each step is tried. So when you go from minimum temp (Lo) to maximum (Hi), you'll hear if the flap is doing the right thing or not and the noise at Lo is very different to that at Hi.

 

Thanks astormorg, I did try and reset today but nothing changed, and I never heard any real change in sound. I only seem to get air out of the das vents right now, and only hot air as the engine warms up. The battery was just changed by the previous owner at the local Jag dealer, you would have thought they would be aware of such things.
Guess it's back to the drawing board, I'll probably try and manually move the air mixing flapper and see if I at least have cold air available.
Thanks everyone,
Jack

 

An update, I have been wrestling with this problem for months, Tried everything forum members have suggested, Finally gave up and brought it to the dealer. He told me I should be thankful here in Florida it's only blowing cold air, because that's all I'm going to get, Said the matrix needed to be replaced but is unavailable. I know I can manually move the blend door and get hot air if I need it. I think he's full of it, but at least I got $150 car wash

 

Well the dealer would say that wouldn't he!!

Sounds to me as though either the blend door stepper motor is U/S or it's become disconnected from the door spindle - common fault and a Jaguar Tech Bulletin out on how to fix it. DIY is easy with superglue.

 

Thanks for the input, but the doors are all free and securely connected to the stepper motors. The entire problem is none of the motors are moving, if I could find the common element controlling these three motors, I would probably have the solution, I thought the CCM would solve the problem, but no change after replacing it. I just drove the car from FL to CT and now have to manually switch from cold to hot air and move the other door from dash to floor and defrost.I really wish I could find a solution to this problem.....

 

Interesting that none of the stepper motors work - that's new important info. It suggests a power supply problem. There are three fused supplies to the CC Module. For MY2003, the most likely to cause your fault is F75 7.5A, but it could possibly be either F80 7.5A, or F99 10A. These are all in the passenger compartment fuse box. Worth a try!

 

I had checked fuses as the very first step. Using the owners manual I checked every fuse that seemed to have something to do with climate control components. I don't recall the # 99 fuse, I will check that when I get back home next week. I wonder how it is shown in the manual, what it powers?

 

The reason it's less likely to be F99 is that that fuse also covers the interior lighting and presumably you'd have noticed if you'd lost that too.

If all the fuses are good, your next step should be to use your meter to check that you're actually getting power to the CC module - Blue wire, Pin 14, Orange/Yellow, Pin 1 and White/Red, Pin 2. All 12v.

Power from the module to the three stepper motors is more difficult to check as they use pulsed signal voltages, not straight 12v. Jaguar advise not to check with non specialist equipment.

Jaguar also advise:

If, for some reason, a panel is disconnected without the battery being isolated, be sure to refit the black connector first, the white connector second. This enables power to be at the stepper motors prior to powering the climate control panel software.

Two final thoughts: does the blower motor work and does the recirc button operate the recirc flap motor - those motors are both 12v motors, not stepper motors and would show if there was any output from the module. Does anything show up on the display screen? External temp indication OK etc.

 

Yes, I have interior lights, control of the fan, display of external and selected temp, and when I press the defrost button the sound changes. Just can't get any of the stepper motors to move. I am out of town now, but will check those voltages when I get home.Thanks so much for the input!

 

Here is what I did. I disconnected the heater motor from the computer to see if there were be a change, and there wasn't so I knew it was the physics principles, and not the distribution. I made sure the flap was shut on the cold side. The JTS shows you how to remove the glove box, and all 3 motors, I think its the bottom on I disconnected. I have to connect it up again. I got my compressor, accumulator, orifice tube on the garage floor. I've done video on some of it. Removing the accum line at the fire wall with those plastic quick connects is a pain. everything else is pretty easy.

I'm doing a flush tomorrow and I'm going to add the oil and new compressor and 28.3 oz of r134, and I'm going to weigh it from a digital scale. One of the TSB's states that not weighing the proper amount will affect cooling, and they stressed this, so okay, I will do it.

I also removed the spring from the valve and put it in reverse as per the other TSB on this page. I sounds like a load of rubbish, but nobody has stated it so, so if it works better, okay, I can always put it back unless it explodes. I have a few days so if this is wrong let me know now! lol

looking under the dash isn't so bad either if you follow the JTS instructions and use common sense.

 

Sorry to revive an old thread but I bet somebody else is having same problems I am at this time of year. When it's cold and also rainy my windows are fogging up big time. I followed the procedure I quoted above and the system seemed to react properly to each change and I could hear and feel the air changing to the different zones. When I cycled temp buttons up from LO to HI the system also changed from full face to floor along the way. All seemed ok EXCEPT for the Defrost selection. I hear a roar behind dash as if the airflow is directed to the demister vent but I can barely feel a trickle of airflow onto windscreen. Even if I manually select the far right button for floor/def combined there is very little airflow to defrost vents. I think I read that this may mean a fault in my fresh air recirculate door but why would not the system blow any air to demister vents even if the door was stuck in recycle all the time? Again sorry for reviving such old topic but I'm stumped. Thank you

 

Rob: If I understand correctly, you can get air to blow hot or cold, and at your face or your feet, but not at the windshield.

The likely problem is stepper motor #3, or the defrost blend door controlled by motor #3 in the attached pdf. It's the top, right motor in the attached picture.

To access these stepper motors, remove the glove box - a couple screws inside the back, top of the box, iirc.

Unscrew stepper motor #3 from the air box, without unplugging the electrical connector. Now operate the climate controls as if you want to blow air at your face, then at the windshield, and back at your face again. Does stepper motor #3 turn both directions as you change the climate controls? If 'no', open the stepper motor and expect to find a nylon gear with some broken teeth. Replacements from salvage yards are available on eBay.

If 'yes', the stepper motor turns properly, then try to manually turn the shaft of the defrost blend door. Be careful not to push on the shaft - if you push it into the air box, it's a pita to get it back into position. You may discover the defrost door was stuck and now rotates freely. Or you may find slippage between the end of the shaft and the stepper motor, which people have repaired with a drop of superglue.

Ask if you have more questions. Please share what you find and how you fixed it, to help the next person.

 

Thanks dwclapp yes I saw these other posts about the stepper motors when trying yo research my issue and specifically saw the superglue gel TSB procedures, but I thought that was addressing other issues like fresh air door I will definitely do the diagnosis of stepper #3 and see if that's my problem. I guess my confusion is why wont the air go to the defrost vents in either the fresh air or re circulation modes? Really appreciate you replying to me and I will report back. May be the weekend before I get to tear into the glove box

 

Robin:

The inlet blend door (actuator #1) simply selects the air intake source: 100% internal recirculation, or a blend of internal and external air.

The temperature blend door (actuator #4) passes air thru the heater core when the temperature control is set to HI, and bypasses the heater core when set to LO.

The foot blend door (actuator #5) redirects the air from your face to your feet.

The defrost blend door (actuator #3) redirects the air from your face to the windshield.

I suspect your defrost blend door is stuck in the position that directs air at your face, never at the windshield. This air OUTPUT problem will continue as long as the defrost blend door is not working, and it does not matter if the air INTAKE is recirculated cabin air or a blend with external air.

Helpful? If 'no', ask and I'll try to clarify.

 

I just accessed the cabin air filter and after removing it (needs changing by the way) I could tell the fresh air door is stuck in the closed or recirculate position behind it. I tried to push it open with a wooden dowel I have and it slightly opens as I had the ignition set to position 2 and the system set to not recirculate air, so it should have been open. With firm pressure applied by the dowel the air inlet door tried to open slightly and I could hear air sucking in but it wouldn't move freely so I didn't force it. I suspect that it is forced in that position by the actuator. Should I skip immediately to that door actuator removal as described in the TSB or go through the stepper motor for defrost door diagnosis as well? Or do I have to remove number 3stepoer anyway in order to get access to air inlet actuator? I am hopeful this once sorted will get my air issues solved.

 

Dwclapp so I just removed the stepper motor number three and tested its operation. The shaft on the motor does turn through the cycle back and forth when I selected Def and then switched to Face vents in control panel. So stepper motor seems ok. I used a hex wrench to turn the white end of the defrost door shaft and turned it the direction the stepper motor would to send air to defrost vents. TONS of air now through those vents. So then I tried to turn it back the other way to close it off as if stepper motor would close it. Well I can turn that end of door shaft with my hex wrench many times without the door ever reaching a "stop". I know I turned the shaft several times 360degrees so it should now be closed. But the same volume of air is still flowing through the demister vents. I can get the other buttons to react and send air to face and floor vents but not as much as before I moved the defrost door. I almost pushed the defrost door shaft too far in and was able to save it by inserting a small screwdriver and prying it back out flush with the housing. So is my defrost door broken in the housing and not moveable now from the open position? I haven't tackled the fresh air door actuator but it's still in closed position so everything recirculates. Please advise what action I should take next.