I dont thinks it the DCCV

[lavonjag]

Hot air blows out of vents. Did resistance test on dccv and it appears to be ok. Compessor working fine, checked fuses, checked aux. water valve, did DATC test and it showed code 1265 & 1263.

Does anyone have any ideas.

 

[Rifleman@LaymansPC.com]

B1263 1263 Panel Door Actuator Circuit Failure Go To Pinpoint Test C .

B1265 1265 Cold Air Bypass Door Actuator Circuit Failure Invalid code. Vehicle not equipped with cold air bypass door actuator. Ignore this code and continue diagnostics.

Pinpoint test C can be found here >> http://deneau.info/ls/s6x~us~en~file=s6xc0003.htm~gen~ref.htm#extract_246

Good luck. Let us know how it turns out.

 

[lavonjag]

Looks like this is a job for next weekend. I guess I can put the dccv back in now with this new information. But I will keep u updated to let u know what I fined.Thanks

 

[joegr]

What year is your LS?
Gen I has a bypass door, and gen II does not.
There is a fuse that supplies power for the DCCV and the compressor clutch. I'd check that too. If it's the fuse, then your DCCV probably is bad and will cause failure again soon.
If I went to the trouble to take the DCCV off, I'd go ahead and replace it anyway. Did you measure resistance between the coil terminals and the metal housing? If you get any reading there, the part is bad.

 

[lavonjag]

It is a 2000. After I blocked off the coolent line with no change I checked all fuses and they were ok. I thought about replacing the dccv.....but I'll decided against it and let that be a job for a nother time. Because the DATC is not cheap if that what it turns out be that is wrong.

 

[joegr]

It is rare for the DATC to fail, but in your case that maybe what has happened. On the plus side, since failure is rare, you should be able to get a working one from a junk yard.
Do keep in mind that you may have a dual failure, DATC and DCCV.

There is no way to get hot air out of the vents if the heater line is correctly blocked off. You have to either block off the return line from the dual core, or both of the feed lines.
If after doing this, the air is not cooled, but not hot (I mean very hot) either, then you have a problem with the AC compressor, low R134, or expansion valve.