I am by no means an expert in this area and have a lot to learn but have you looked into your Climate Control system to see if it is doing what it is suppose to do. I think you are working all around the problem, but what do I know. http://jaguarclimatecontrol.com/ I hope this helps.

 

Gus. I suspect you are much more an expert than you willingly admit. I read the article and associated pages previously when others suggested them.

But they only provide diagnostics for is the "Hot air only" problem. I have the opposite problem. I have the “cold air only” problem. The DCCV valve tests out and appears to be working correctly.

I do not see any other applicable tests in that thread and links in it. If you can help me find those tests I would appreciate it.

Thanks.

 

If it were me I would send a note to jaguarclimatcontrol.com and see what they say. You may be overlooking the obvious.

 

I think if the dccv is unplugged you will force the system to blow 100% hot air. This tip might help you solve the mystery going on here.

 

Any tips on which blend door has to open to let the heated air out into the blend box and into the cabin would be appreciated. The name seems to be the "evaporator heatercore blend door". But where the actuator for this blend door lives, none of the diagnostic websites given seem to list.

 

The DCCV is sending hot 'coolant' to the heater core only when the system is set to heat settings. There is obviously return 'coolant' recirulating back to the DCCV when the system is set to heat as well. So I am 99.9% certain it is not the DCCV. The heat is not being let out of the heater box and into the cabin.

 

Do you mean the one shown in the Electrical Guide fig 06.1 as Cold Air Bypass Actuator?

 

That could be the one... Where do I find the "Electrical Guide"????

 

If you go to my page I have 2 onelines for that car a 2002 & 2002.5 Take your pick http://www.gusglikas.com/AutoRepairElectrical.htm

 

The Elec Guide is part of JTIS. Click on the relevant menu item
Or a URL for it has been posted here often:
http://www.captainjaguarscathouse.co..._Reference.htm

 

BugDoc, Have you found the problem and fixed it?

 

Not yet. I have not had time to drop the glovebox insert yet to get into that side of the air exchange box. I was away at a conference from Saturday until today and life has just been full.

I will report back once I do figure it out, for certain.

 

I am sending you both the same message. I think you are both working towards the same resolution and could be comparing notes. You both have a lot of help and may be on a solution soon I hope.

https://www.jaguarforums.com/forum/s...ad.php?t=50343
https://www.jaguarforums.com/forum/s...t=49227&page=5

I am also going to attach the little information I have that may or may not help. http://www.jagrepair.com/AC2000SType30.htm You have a great resource on this forum and they are all willing to help.

I will to continue to follow your tests and solutions. Good Luck!

 

You guys are amazing with the info. exchange with troubleshooting. Has bugdoc ruled in/out the DCC module?

 

Maybe this TSB (JTB00103) provides some useful info http://ww2.justanswer.com/uploads/cr...00103NASF1.pdf

 

Like most of the diagnostics I have seen this TSB is for a problem with "No cold air" not "no hot air".

I have the "no hot air" problem.

As indicated earleir the DCCV is getting the correct electrical signals and the DCCV is opening and closing correctly.

I'm out of town again from Thursday until Sunday so getting into the blend box is not going to happen this weekend.

It is getting warm here in TX (74oF today) so the heat is not so urgent. I'll get this sorted out and report back what I find.

Thanks for all the moral support!

 

For anyone else doing CCM / DCCV diagnosis, the TSB has pics which may be useful, as well as identifying some wires and the expected electrical behaviour.

 

JagV8 is right. There is A LOT of good info in that link. It may help you if you have a different problem than I do. Take a look if you need to locate components or if you are having heat working with no A/C.

Thanks for continuing to help me out JagV8. I'm certain will takle this problem once I have time to deal with it.

 

I have an almost new ccm for an 02 if your interested in it pay postage to you and I'll send it if it works send me something for it. If it doesn't send it back

 

OKay had a thread going but not that i played with the dccv all day i realized im in the same boat as you..... no heat but all three pipes get hot 2001 s type v8