A/C not working?

Welcome to 2CarPros.

It could be a few different things. O-rings can leak, a loose connection, or one of the lines. What I need you to do is follow the directions in this link. It explains how to find a leak.

https://www.2carpros.com/articles/air-conditioner-leak-detection

this guide can help as well

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

This video can help as well

https://youtu.be/4UjfQKvrB6Y

Please run down these guides and report back.

Could be many things, first you must see if you are getting power and ground to the compressor while turned on. Unplug the connection at the compressor turn the key and the air conditioner on and make sure you have power and ground that's where to start. If you have power and ground then its a bad clutch, if not you probably have to take it to a shop to have many other things to checked.

You might want to use a scan tool to look at the data for the air conditioner pressure switch to see if it looks correct. It has a 3 wire switch that delivers a specific pressure to the PCM and the system will shut down if that pressure is too high or too low.

Hi Tcdeal,

Swapping the battery terminals can really mess things up, I think your lucky that was it for stuff not working. The A/C blowing cold for a short time is interesting, there's a few things to look for to figure out whats happening. Start the car put the A/C on fan on high then go out and watch the compressor. Your looking for the pulley clutch to engage. When it goes on you should here the clutch on it click and the engines rpm's to change from the load the compressor is putting on it. You might be short cycling. meaning it clicks on for a few seconds then back off again. It should click on and stay on. If its clicking on and off again every few seconds even up to 30 seconds its short cycling and something is wrong. Take a look at that and let me know if the clutch is engaging at all and how long its staying on for and we can go from there.

This guide can help as well

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Please run down this guide and report back.

Tom

Hello,

Okay, with the clutch not engaging that our issue. First off we need to check all the fuses there is also a sensor and a relay involved involved that are common failures. Here is the wire diagram below. Do you have a test light?
Tom

So you will want to check for power the dark blue with yellow wire to be 12v and the other will be ground. Verify its ground is good. If you open the fuse relay box and if you can be out at it and have someone turn on the A/C, a small click should be heard from one of the relays in there, touch them to figure out which one you will be able to feel it. If It clicks the switch is sending signal and it's good if the wire leading to the clutch doesn't get hot its the relay that's bad most likely. If on the dash the A/C light is going on then fuse is good and the system is on.

Here is a full description in the system operation and your plug terminal connection information:

Tom

A/C CLUTCH

The A/C compressor clutch components provide the means to engage and disengage the A/C compressor from the engine accessory drive belt. When the electromagnetic A/C clutch field coil is energized, it magnetically draws the clutch plate into contact with the clutch pulley and drives the compressor shaft. When the coil is not energized, the pulley freewheels on the clutch hub bearing, which is part of the pulley assembly.

A/C compressor clutch engagement is controlled by the Powertrain Control Module (PCM) or the Engine Control Module (ECM), depending on engine application. When the A/C-heater control is set to any A/C position, it sends a request signal on the CAN-IHS bus to the Totally Integrated Power Module (TIPM), which then transfers the request on the CAN-C Bus to the PCM/ECM, which determines if operating conditions are correct for A/C clutch engagement. When all operating conditions have been met, the PCM/ECM sends a signal on a dedicated hard-wired circuit back to the TIPM to energize the internal A/C clutch high side driver. When energized, the A/C clutch high side driver provides battery current to the A/C clutch coil.

The A/C clutch control system is diagnosed using a scan tool See: A L L Diagnostic Trouble Codes ( DTC ) > Testing and Inspection.

The A/C compressor clutch components cannot be repaired and must be replaced if inoperative or damaged.

Okay, Tcdeal,
Let me know how you make out and if you need anything else or guidance on this issue.
Tom

Okay, sounds good. We'll get this figured out.
Tom

The compressor may not be coming on because the a/c system is low on charge or there is a problem with the a/c running pressure or a bad a/c clutch/compressor.

Lets start with this guide and see what happens

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

This will tell us if the problem is electrical or refrigerant related.

Yes those are the wires going to the compressor clutch

If the low side reads 0psi with it running or not there is no need to check the high side right now. Thats why the compressor is not comming on atleast one of the reasons. Sounds like you have no charge in your a/c system.