Do not have cool air so I am looking for the AC relay?

2009 TOYOTA MATRIX

2.4L • MANUAL

PRONH

MEMBER
4 POSTS

I have a 2009 Toyota Maxtrix S 2.4L manual. I do not have cool air so I am
looking for the AC relay switch. Once I took the cover
off under the hood I see in the cover it does show the location of the HTR
50A switch but looking at the switches/fuses there is nothing there.
I've included pictures. Can you tell me where I can find this switch?

Also, once i can locate the relay switch what terminal do I jump o the relay to
make the compressor clutch engge.

Images (Click to enlarge)

Jul 20, 2026 at 9:44 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Hello, I can help you, there is no compressor clutch relay like on some cars, this is controlled by the AC amplifier which have a history of going out. Here is the wiring diagrams so you can see how the system works and the location of the amplifier as well. Check out the images (below). Please let me know what happens.

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Jul 21, 2026 at 12:23 AM

PRONH

MEMBER
4 POSTS

Thank you for this. I will check it out tomorrow and will let you know how it goes. ~~. Roger

Jul 21, 2026 at 1:06 AM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Sounds good, I would also make sure there is refrigerant inside the system. This video can help.

https://www.youtube.com/watch?v=uZrQCGwXfek&t

Please go over this guide and get back to me.

Jul 21, 2026 at 3:39 PM

PRONH

MEMBER
4 POSTS

Hi so I found the location of the a/c amplifier and I'm in the process of getting a new one. I will let you know how this all works out. Just wanted to give you an update.

Jul 21, 2026 at 8:33 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Thank you, does the system have refrigerant?

Jul 22, 2026 at 2:51 PM

PRONH

MEMBER
4 POSTS

Yes it has refrigerant Thank you

Jul 22, 2026 at 7:26 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

Okay, let me know what happens when you get the new AC amplifier.

Jul 23, 2026 at 2:03 PM

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