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04-12-2010, 09:01 PM | #166 | |
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Re: Dual climate control blowing heat on AC
If you send me a private message with an e-mail address for you I can send you some PDF's from the Factory Service Manual.
-Rod |
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04-12-2010, 09:22 PM | #167 | ||
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Re: Dual climate control blowing heat on AC
Quote:
1. The DCCV. 2. The DATC not powering and therefore closing the DCCV. 3. A temperature sensor fault. You won't believe me, but you are wasting your time and money looking at the air doors. |
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04-13-2010, 07:07 AM | #168 | ||
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Re: Dual climate control blowing heat on AC
Quote:
I have nuten to look at, but to tear out and learn as I go. Will look at the posts on this valve. [EDIT] After reading earlier posts I will unplug it to see if it closes.
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04-13-2010, 05:58 PM | #169 | |
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Re: Dual climate control blowing heat on AC
It opens (full heat) when you unplug it. It closes if you connect +12V and ground to each of the two solenoid coils (if it's working).
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04-15-2010, 01:43 PM | #170 | |
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Re: Dual climate control blowing heat on AC
I thought I read on a earlier post it was the opposite.
So it want do me any good to disconnect it. I know, I will find a place to clamp off the hoses just to see. I bet that will stop that hot water.
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04-15-2010, 04:22 PM | #171 | |
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Re: Dual climate control blowing heat on AC
Well from what I see Amazon wants $135 for the DCCV unless someone knows of a better price. I figure if Im going to tear out the old one might as well have the new one here.
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04-15-2010, 08:35 PM | #172 | |
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Re: Dual climate control blowing heat on AC
Joegr is right, when there is no voltage or the DCCV is unplugged, the valves default to wide open if they are not stuck. So, if you problem is heat when their shouldn't be heat, clamping off the coolant lines won't tell you if the problem is due to valves that are stuck open, a DCCV that isn't working, or no signal from the DATC to close the valves. Changing out the DCCV without diagnosing it could cost you a lot of money and a headache at the same time, without actually fixing anything.
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04-16-2010, 08:37 AM | #173 | |
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Re: Dual climate control blowing heat on AC
I went ahead and ordered one last night. I figured if Im gonna tear into looking at the old one I just as well replace it while Im at it.
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04-16-2010, 08:37 AM | #174 | |
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Re: Dual climate control blowing heat on AC
There's a three-pin connector to the DCCV, at the DCCV. Find it. With the connector still plugged in, measure the voltage between the center pin and one of the outer pins. Do this with the engine running and the climate control set to 60 degrees. You should get close to 13V. Now measure from the center pin to the other outer pin. You should get the same voltage. If you do, and you are getting hot air out (not just uncooled air), then you have a bad DCCV. If either voltage is zero or very low, then you have a bad DATC, wiring, or temperature sensors.
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04-16-2010, 01:24 PM | #175 | |
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Re: Dual climate control blowing heat on AC
On my wife's 2002 LS V6 there was another DCCV connector located on the passenger side top end of the radiator which made it very easy to get to the connector to perform the measurements suggested above.
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05-07-2010, 01:36 PM | #176 | |
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Re: Dual climate control blowing heat on AC
Well.......finally. It appears the new dccv fixed it.
And for those who dont have a clue what it looks like. A pic of the new one. The old one with hoses, and a idea where this bastard is located.
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05-19-2010, 08:26 PM | #177 | |
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Re: Dual climate control blowing heat on AC
Help! Its hot... I have an 03 ls v6. Blowing heat on a/c. Read some posts and did some poking around under the hood. I was gonna diconnect and reconnect the dccv from the plug that's pinned between the fan and dryer but the blck/orange wire snapped too close to the connection to just retape it. It snapped pretty easily so i hope its just a corroded wire. Anywho... I held the snapped wire together while my friend got the dtc 12 42... I know I need to fix the pigtail before anything else but any help with the code after I fix the wire.
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05-19-2010, 09:22 PM | #178 | ||
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Re: Dual climate control blowing heat on AC
Quote:
http://deneau.info/ls/s6x~us~en~file...~ref.htm#PS2-C I would correct the DCCV problem first. I have scanned a few LSes with failing DCCVs and one of them had a 1242 code too. The 1242 code went away after the DCCV was replaced. Maybe the short circuit in the DCCV was overloading the DATC. In any event, the air inlet door wouldn't have much effect on the outlet air temperature. |
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05-20-2010, 11:41 AM | #179 | |
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Re: Dual climate control blowing heat on AC
Thanks a lot 34ford. Not just for the advice but for replying so quickly. I replaced the dccv and problem solved.
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05-20-2010, 11:55 AM | #180 |
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Re: Dual climate control blowing heat on AC
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