help 2001 camry a/c not working mgclt pin 2 no ground - Toyota Nation Forum : Toyota Car and Truck Forums
Camry 3rd & 4th Gen (1992-1996 & 1997-2001)/1st Gen Solara (1999-2003) Toyota Camry Discussion for years 1992-1996 & 1997-2001, as well as Solara discussion for years 1999-2003. Topics of discussion range from fuel economy, safety, modifications, performance all involving America's favorite family car, the Toyota Camry.

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post #1 of 2 Old 06-15-2019, 12:26 PM Thread Starter
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USA help 2001 camry a/c not working mgclt pin 2 no ground

i have a 2001 camry i changed mg clt relay and the a/c light still blinks i know if i put a wire on pin 2 fuse box mgclt relay too negtive battery a/c kick in and it works i change the ecm the relay and the a/c button inside the car and what does a a/c ampflyer do i will add pics later

Last edited by Ricky Espino; 06-15-2019 at 12:46 PM.
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post #2 of 2 Old 06-17-2019, 07:02 PM
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Hi Ricky,

The A/C Amplifier circuit is Toyota's implementation of an intelligent "A/C cut relay" controller. It accepts inputs from various sensors, compares values vs. expected parameters, and commands the A/C compressor clutch to engage / or disengage accordingly.

By (bypassing) the A/C Amplifier at the "last mile" @ the Magnetic Clutch Relay, you have verified the Magnetic Clutch engages on the A/C compressor (which is a good test, BTW), but have not diagnosed "why" the A/C Amplifier is not commanding proper A/C operation -> at the Magnetic Clutch Relay.

Common basic checks include serpentine belt tension, wiring @ the A/C compressor and Pressure switch, High / Low refrigerant pressure values in the system. Following are some links to TN posts that may be useful to you & help in diagnosing the issue:

* In addition to above - having the correct Field Service Manual (FSM) for your year/model vehicle is almost a "requirement" when diagnosing A/C issues, hope this helps.
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