AE111 A/C amplifier connection?

GYAN

MEMBER
2001 TOYOTA COROLLA
1.6L
4 CYL
2WD
MANUAL
212,633 MILES

I purchased my car listed above with the A/C amplifier removed and replaced with a mechanical thermostat by the previous owner. My problem is idle drops whenever I turn the A/C on, so I decided to buy a surplus A/C Amplifier and plug it in but when I turn the A/C on only the blower fan works the compressor is not engaging. I've already cleaned the throttle body and replaced IACV.

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1 Reply

KEN L

MASTER CERTIFIED MECHANIC
48,363 POSTS

It sounds like you may have a bad ground, here is a guide to help you test the connections. Also, the engine may not be getting a signal that the A/C is on, this is why the idle speed does not kick up a little when the system is on.

Please go over this guide:

https://www.2carpros.com/articles/how-to-check-wiring

Here is the A/C system and A/C amplifier wiring diagram so you can see which wires to test and how the system works. Check out the images (below). Please let us know what happens.

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