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S-Type / S type R Supercharged V8 1999 - 2008

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  #1  
Old 03-18-2012, 12:12 PM
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Exclamation DCCV replacement

Jaguar S-Type DCCV

This procedure is related to a no heat to the driver’s side of the car.First let me say I read several posts on this problem prior to my getting involved in it. I then posted my problem looking for additional information and direction.

What I found is that the heat in the car was about 20° cooler on the driver’s side with the control panel set to 85°. I went to the DCCV and checked the temperature on the three heater tubes going back to the firewall. What I found is that the two feeds going in were about the same and the return tube was in the same temperature range. Bottom line it did not offer any help to evaluate or pinpoint the problem. My thought was that it was electrical so I checked fuses to the entire heating/coolant system and found no problems. I then went to AllData and it offered little to no help in trouble shooting, I then went to http://jaguarclimatecontrol.com and they had a lot of information but I was not ready or convinced it was in the control module or sensors or control valves. In the meantime I wanted to better understand the coolant/heating system so I began to draw out the system, the drawing in any of the references were not like what I had in my car. I will provide my drawing and the factory drawing as an FYI for you. I then had a recommendation to unplug the DCCV and see if I had heat. The information provided was that the DCCV in a relaxed mode (no power/control) is a wide open heat mode. With the plug removed I had the same results, no heat to the driver’s side. At this point I replaced the DCCV. I was a little apprehensive that the DCCV was the cause until I took it apart and found out how it worked. I had visions that it was a clogged heater core and that was not the case.
Electrical diagram to the DCCV:
Click the image to open in full size.
Click the image to open in full size.
The power plug to the DCCV. It is a little hard to get to and not easy to remove. Be patient and take your time.
Click the image to open in full size.
The information below is my procedure to replace the DCCV and the evaluation of the valve and what I found to be the cause.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Installed the DCCV and all was good. Heat again!!
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
What I did to bleed the system was to open the bleed valve at the coolant expansion tank. I did not open the other bleed valve because it was said you may cause damage to the valve and plastic pipe.

I am also providing another link on my page about replacing the DCCV and bleeding the system.
I hope this helps.
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The Following 4 Users Say Thank You to jag-pilot For This Useful Post:
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  #2  
Old 03-18-2012, 01:05 PM
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I didn't see anywhere which engine etc but I reckon you've a 3.0 pre-2003. The system changed then.
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  #3  
Old 03-18-2012, 10:57 PM
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Yes this is for s-type pre 2003 3.0 engine
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  #4  
Old 05-03-2012, 04:13 PM
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hi i have 3.0 ltr s type se on a 99 plate. i have no heat just cold air bothe sides, i took the dccv off had a look at it with the help of the pictures above, took the valves out to see if i could free them up . when they are out of their housing there seems to be a lot of movement but when they are put back there seems very limited movement. very hard to get anything on them .... anyway put a hose to the inlet and managed to get some water through them when under pressure so thought maybe ok so put it back on car but still no heat..... the pipes upto the valve nice and hot but on the other side limited heat. upto the rubber hoses for the matrix along bulk head. any ideas ? would limited flow through the valves stop all heat reaching the cabin or would i still get some heat?
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  #5  
Old 05-04-2012, 08:19 AM
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Nice write up!!! Kudos, I'm sure this will help many owners now and in the future.
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  #6  
Old 05-04-2012, 11:10 AM
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It is a good write up, but it's a cut and paste from Gus's site isn't it?

JagRepair.com - Jaguar Repair Information Resource
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  #7  
Old 05-04-2012, 01:30 PM
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It is Gus's site by a new name

Have a look at the About Me
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If you would like the most accurate assistance, it is very helpful to place your vehicle information into your signature line, just look in your member control panel to set it up. Info like year, model, engine size, and other details like mileage can only aid in receiving more replies with the correct information. (thanks, h20boy!)
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  #8  
Old 05-04-2012, 02:58 PM
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Any special About Me?
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  #9  
Old 05-04-2012, 03:16 PM
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Well I'm guessing Gus thinks it's special....
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  #10  
Old 05-04-2012, 03:21 PM
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I'm sure he does, and I would agree with him.
Has he had some kind of input into this thread?
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  #11  
Old 05-04-2012, 04:21 PM
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By proxy at least, depends on who the OP jag-pilot is.
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  #12  
Old 05-04-2012, 04:51 PM
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Mmm!
Click the image to open in full size.
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  #13  
Old 05-04-2012, 05:02 PM
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Wow, I'd no idea you looked like that!
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  #14  
Old 05-04-2012, 05:12 PM
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Damn! Do you think I can get a refund?
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  #15  
Old 05-04-2012, 05:38 PM
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You paid to look that way?

hmm, call it a learning experience.
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If you would like the most accurate assistance, it is very helpful to place your vehicle information into your signature line, just look in your member control panel to set it up. Info like year, model, engine size, and other details like mileage can only aid in receiving more replies with the correct information. (thanks, h20boy!)
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  #16  
Old 05-05-2012, 06:21 AM
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Quote:
Originally Posted by Norri View Post
It is a good write up, but it's a cut and paste from Gus's site isn't it?

JagRepair.com - Jaguar Repair Information Resource
You're right Norri - is the OP in fact our friend Gus?
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  #17  
Old 05-05-2012, 07:53 AM
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Hmm! That sounds like my work, it looks like my work, oh it is my work links and all!

Quote:
Originally Posted by jag-pilot View Post
Jaguar S-Type DCCV

This procedure is related to a no heat to the driver’s side of the car.First let me say I read several posts on this problem prior to my getting involved in it. I then posted my problem looking for additional information and direction.

What I found is that the heat in the car was about 20° cooler on the driver’s side with the control panel set to 85°. I went to the DCCV and checked the temperature on the three heater tubes going back to the firewall. What I found is that the two feeds going in were about the same and the return tube was in the same temperature range. Bottom line it did not offer any help to evaluate or pinpoint the problem. My thought was that it was electrical so I checked fuses to the entire heating/coolant system and found no problems. I then went to AllData and it offered little to no help in trouble shooting, I then went to http://jaguarclimatecontrol.com and they had a lot of information but I was not ready or convinced it was in the control module or sensors or control valves. In the meantime I wanted to better understand the coolant/heating system so I began to draw out the system, the drawing in any of the references were not like what I had in my car. I will provide my drawing and the factory drawing as an FYI for you. I then had a recommendation to unplug the DCCV and see if I had heat. The information provided was that the DCCV in a relaxed mode (no power/control) is a wide open heat mode. With the plug removed I had the same results, no heat to the driver’s side. At this point I replaced the DCCV. I was a little apprehensive that the DCCV was the cause until I took it apart and found out how it worked. I had visions that it was a clogged heater core and that was not the case.
Electrical diagram to the DCCV:
Click the image to open in full size.
Click the image to open in full size.
The power plug to the DCCV. It is a little hard to get to and not easy to remove. Be patient and take your time.
Click the image to open in full size.
The information below is my procedure to replace the DCCV and the evaluation of the valve and what I found to be the cause.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Installed the DCCV and all was good. Heat again!!
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
What I did to bleed the system was to open the bleed valve at the coolant expansion tank. I did not open the other bleed valve because it was said you may cause damage to the valve and plastic pipe.

I am also providing another link on my page about replacing the DCCV and bleeding the system.
I hope this helps.
__________________
Gus
www.jagrepair.com


XK8 1999 126,000mi K&N Filter, S-Type 2000 3.0 120,000mi K&N Filter
“If you can't dazzle them with brilliance, baffle them with bullshit.”― W.C. Fields
Insanity: doing the same thing over and over again and expecting different results.-Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of IDIOTS.” – Albert Einstein
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  #18  
Old 10-19-2012, 12:38 PM
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Anything on replacing the DCCV on a '04 XJ8?
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  #19  
Old 10-19-2012, 05:34 PM
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If there is it'll not be in this forum, which is for the S-Type...
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STR 2004. Acronyms: http://www.jaguarforums.com/forum/s-...-jaguar-78910/
If you would like the most accurate assistance, it is very helpful to place your vehicle information into your signature line, just look in your member control panel to set it up. Info like year, model, engine size, and other details like mileage can only aid in receiving more replies with the correct information. (thanks, h20boy!)
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  #20  
Old 10-19-2012, 05:39 PM
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I am the real author of the information in this post for the DCCV and it was for S-Type cars. I have not seen any info on the XJ DCCV in fact I did not know the XJ had one.
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XK8 1999 126,000mi K&N Filter, S-Type 2000 3.0 120,000mi K&N Filter
“If you can't dazzle them with brilliance, baffle them with bullshit.”― W.C. Fields
Insanity: doing the same thing over and over again and expecting different results.-Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of IDIOTS.” – Albert Einstein
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Old 10-19-2012, 05:39 PM
 
 
 
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Tags
2000, 2004, airlock, coolant, dccv, diagram, heat, jaguar, removal, remove, stype, tank, type, valve, xjs, xtype



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