2001 Chevrolet Monte Carlo 01 SS

BEALE120

MEMBER
2001 CHEVROLET MONTE CARLO
3.8L
V6
FWD
AUTOMATIC
5,000 MILES

AC Compressor not working. Do you have the wiring diagram for the entire system? I would greatly appreciate it!

Thanks Eric

Friday, April 4th, 2014 AT 10:10 PM

5 Replies

WRENCHTECH

MECHANIC
20,758 POSTS

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Saturday, April 5th, 2014 AT 4:11 AM

WRENCHTECH

MECHANIC
20,758 POSTS

You're probably going to need a good scan tool to diagnose this properly. You need to see what the computer is seeing as far as requests, commands and pressure sensor signals. DO NOT try to jump out the pressure switch.

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Saturday, April 5th, 2014 AT 4:13 AM

BEALE120

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23 POSTS

Hey man,

I really do appreciate the AC diagram and the information you gave me. I actually have this diagram which seems to be incomplete on the AC turn on/turn off switch at the HVAC Module to the AC request signal side going to the BCM. If that is the main diagram from the service manual then how exactly does the AC Request Signal at the BCM send the signal to ground the other terminals to PCM to complete the AC circuit? I think that this diagram is incomplete simply because there are no wires going from the BCM to the PCM, (other than the wires for the DLC which I don't think have anything to do with the circuit.) What do you think?

Thank you for all your time and help!

I greatly appreciate it!

Eric

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Saturday, April 5th, 2014 AT 12:36 PM

WRENCHTECH

MECHANIC
20,758 POSTS

That is a complete diagram for the compressor controls. The only thing that is in other diagrams are the blower controls and inside temp control which are unrelated to your problem. The BCM communicates with the PCM on a digital data bus where all the modules communicate with each other. That's why you can't diagnose this yourself. The modules are using digital data and logic.

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Saturday, April 5th, 2014 AT 12:44 PM

BEALE120

MEMBER
23 POSTS

Hey man,
Understood! I really want to thank you for your help! I may be emailing you again in the future, I have a lot of cars that needs a fixing. LOL! You don't have to email me back but again I would like to thank you for your time!

Greatly appreciated!

Eric