A/C not working at idle?

2015 TOYOTA COROLLA
106,562 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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SUDESH HARINARINE
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A/C works while driving fine when you're at an idle the A/C compressor turns off and the radiator fan does not work, only with the A/C at idle. My car does not overheat. The only thing i noticed is the A/C pressure goes up and the compressor turns off because the fan does not come on the cool the cond. down.
Jun 28, 2023 at 12:27 PM
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STRAILER
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Yes, the condenser fan must run with the A/C system on so this is the problem. Here is the A/C fan wiring diagram so you can see how the system works. There are 7 fuses that run the system that we should check for power first, here is a guide to help and use the wiring diagrams to see which fuses they are.

https://www.2carpros.com/articles/how-to-check-a-car-fuse


If the fuses are okay, I would swap out the Fan Relay1 also, does the fan come on at all Check out the images (below). Please let us know how it goes.
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Jun 29, 2023 at 5:22 AM
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SUDESH HARINARINE
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What should the red wire on the coolant module on the radiator, because when I apply 12v to the fan motor wiring everything works okay. My radiator fan does not work but the car never overheated. Thanks
Jun 29, 2023 at 11:42 AM
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SUDESH HARINARINE
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what should the voltage be on the red wire?
Jun 29, 2023 at 11:54 AM
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STRAILER
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That looks like a sensing wire between the cooling fan ECU and the PCM. Did you check the fuses and relays?

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

We should do a CAN scan as well; you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

Please go over this guide and get back to us.
Jun 30, 2023 at 3:12 AM
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