2000 Infiniti G20 A/C problem

Tiny
GREG13672
  • MEMBER
  • 2000 INFINITI G20
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 200 MILES
I replaced the A/C compressor (for a friend) on his 2000 infiniti G20, (the old compressor shaft seal was leaking badly, would not hold Freon for a whole day) The replacement compressor did not have a spot for what I think was a thermal protect disconnect disc, AND the single wire plug was different, so I cut off the plug from the old compressor and soldered the old plug to the new compressor, installed the compressor on the car pulled a vacuum on the system and charged it with oil and 134-a Freon according to the sticker under hood. Now when I push the A/C on button inside the car the inside blower comes on but there is no signal to the A/C clutch relay. I can jumper pins 30 and 87 in the relay plug and the compressor comes on and works fine as long as I turn on the cooling fans with my scan tool. I have also replaced the HVAC control unit in the dash but nothing changed
I even went back and added the thermal disc in line to the clutch just to see if it made a difference, it did not. I checked the 3 wire pressure sensor and found one wire has 5 volts another is showing a ground and the other shows either open or is a return signal wire? The REALLY bad part here is my friend clams it was working before I replaced the compressor. I dont think it was but who knows now!
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Wednesday, September 16th, 2015 AT 1:58 PM

13 Replies

Tiny
RIVERMIKERAT
  • MEMBER
First off, Freon and R-134a are two different substances and they are not compatible.

I've included the schematics for both manual and automatic HVAC systems in this car.
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Wednesday, September 16th, 2015 AT 2:09 PM
Tiny
GREG13672
  • MEMBER
Okay, R134-a sucks! I agree!
NOW lets see if I can FIX this POS!
Thanks!
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Wednesday, September 16th, 2015 AT 2:16 PM
Tiny
RIVERMIKERAT
  • MEMBER
No problem. Let me know if you have problems with the images and I'll upload them to my Dropbox for you.
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-1
Wednesday, September 16th, 2015 AT 2:18 PM
Tiny
GREG13672
  • MEMBER
YUP, Cant get them to load.
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Wednesday, September 16th, 2015 AT 2:22 PM
Tiny
RIVERMIKERAT
  • MEMBER
That's what I thought.

Www. Dropbox. Com/s/v2op3anvqp33wn1/va128212. Svg?Dl=0

www. Dropbox. Com/s/b206dkz5vm8lur7/va128213. Svg?Dl=0

www. Dropbox. Com/s/h4dvzury4jd3if9/va128235. Svg?Dl=0

www. Dropbox. Com/s/sqyjful90pyxf7a/va128236. Svg?Dl=0
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Wednesday, September 16th, 2015 AT 2:56 PM
Tiny
GREG13672
  • MEMBER
Thanks man!
I should be able to fix it with these, they are a little fuzzy for my old eyes, But I think I can figure it out from here.

Just so you know, Im Greg

Thank you!
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Wednesday, September 16th, 2015 AT 5:56 PM
Tiny
RIVERMIKERAT
  • MEMBER
No problem Greg. I know the feeling. My eyes aren't spring chickens either.
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Wednesday, September 16th, 2015 AT 8:04 PM
Tiny
GREG13672
  • MEMBER
I just do this as a kinda extra cash thing for my old retired self, I gotta tell ya man, it gets harder every day, and I look at the new cars that will drive them self? OMG!
Im glad I retired when I did!
Have a great week man, thanks for the help!
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Thursday, September 17th, 2015 AT 10:02 AM
Tiny
RIVERMIKERAT
  • MEMBER
You too. My pleasure.
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Thursday, September 17th, 2015 AT 10:22 AM
Tiny
GREG13672
  • MEMBER
Hey man, Is there any way I can request you; if I have other car questions or need schematics for a different vehicle?
Or do you just do Infiniti and or Toyota?
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Thursday, September 17th, 2015 AT 10:40 AM
Tiny
RIVERMIKERAT
  • MEMBER
We handle everything here. I do questions here for cars built and sold around the world in 3 different languages-English, Spanish, and Portuguese.

I think I'm here more often, but we've got about 10 Experts that pop in from time to time when there schedules permit. I like to use this site to help me unlax and rewind between projects for my writing clients.
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Thursday, September 17th, 2015 AT 12:49 PM
Tiny
GREG13672
  • MEMBER
Finally fixed this one!
Rodent chewed wires WAY up under the dash!
Thanks guys!
Never would have fixed it without your help.

Greg
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Friday, September 25th, 2015 AT 10:10 AM
Tiny
RIVERMIKERAT
  • MEMBER
Always a pleasure Greg. Remember us on your Xmas list. Lol!
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Friday, September 25th, 2015 AT 8:10 PM

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