Toyota: 01 Corolla - A/C running when it shouldnt?

To: "MDT Tech®" <com> wrote in message
news:cgx8b.1002$news.pas.earthlink.net...

Just curious what year the Corolla's started mixing in the A/C with the
defrost setting? My older '90 Corolla doesn't activate the A/C when through
the selection switch itself - but if you manually turn on the A/C switch
then it'll come on in the defrost position.

I like this setup alot better as well.

One other quick question ... during late summer my A/C idle up on my 90 4AFE
Corolla for some reason stopped working .... the A/C works fine but doesn't
increase the engine rpm by 100rpms or so when the A/C is on at idle and the
compressor kicks in. I haven't looked to deep into it but was wondering if
the vacuum switching valve going to the adjustable pot on the intake may be
at fault or the voltage going to it? Would you know offhand what voltage I
should be getting going to this VSV mounted on the firewall? Was also
thinking maybe it's a fuse but not sure. Any advice you can pass along
would be great.

Thanks!

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"MDT Tech®" <com> wrote in message
news:cgx8b.1002$news.pas.earthlink.net... 
on? 
(thus 

Yeah, so far that's the only thing about my Corolla I really hate.