Toyota Repair Problems? Ask a Mechanic for Answers ASAP
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Just to clarify you're saying that with the blower set to any speed and you push the air-conditioning switch in to turn on the light in the switch does not illuminate and you cannot get the A/C compressor to engage? Did the noises appear to becoming from the engine compartment area? When the noises occurred and then stopped is that when the air conditioner quit working?
Let me look at a few options and I will get back to you.
It got busy here at work. There is a 7.5 amp A/C fuse that supplies power to the A/C switch. Then there are other multiple fuses. The first thing You need to do is verify that the A/C clutch is working and you can make the compressor turn on. At the 4 wire connector going to the compressor use a jumper wire from the positive battery terminal and apply 12 volts to the BLACK wire with the White tracer. This is a direct apply to the clutch mechanism. If the compressor engages and does not make noise check to see if the A/C blows cold. You need to dis connect the connector if you are un able to back probe the wire at the connector. Let me know how this goes.
OOPs old age.
The radiator fans do not come on if the A/C is not engaging at least for the A/C side. They should still operate for the regular cooling. Make sure when it gets up to operating temp that they come on and it is not overheating. This would be a separate issue.
It can be a separate issue if the fan ( forgot they only have one.) does not come on for the cooling system and it starts to over heat. Hold the engine rpm at 2500 rpm and wait until the fan comes on to verify. It may take awhile and happens at mid point on the gage or 200 deg. The A/C controls the fan also. when the A/C is on.
No disregard that. If i hit the need info tab to send it back then it implies I need more info. I am responding to you either way. No need to hit the accept button. Let me know how this looks.
The fans are controlled by two circuits. One is the A/C input and demand top keep the condenser cool. The other is by way of the temp sensor and is strictly coolant related. They work independent and together depending on the cooling demand.
I also confused this fan with the newer corolla that I am working on with another customer on. This has 2 fans in 2001 to cool the condenser and radiator. they still operate the way I explained.
Let me know how it goes and if you can jumper the clutch and make the compressor come on.
Do you have the VIN available?
Disregard any wire color coding I gave you previously. When you replied back that none of this matches I was beginning to wonder whether I was losing my mind. Just kidding. Normally when questions come through from other countries there will be a listing stating which country or region of the world it's from. This one did not list that so I assume that it was a USA built vehicle. The first picture above is the exact compressor and connector location for the air-conditioning. This comes directly from the vehicle identification number. Unfortunately I don't have access to wiring diagrams for world market cars. This being said Toyota still uses a lot of basic designs throughout their whole model ranges. The air-conditioning magnetic clutch is the same worldwide. The only difference is slight configurations and of course the wiring schematics. This being said your air-conditioning clutch will have either one or two wires going to it, there are two different designs. The electrical main connector will be the same because there is a rotation sensor and heat sensor built in the compressor also. You can see these located on the compressor in the previous picture. There is another separate sub connector or small connector right at the edge of the magnetic clutch assembly. These can be seen in the links below. Click the link to download the image. These pictures were taken from a 2000 Corolla with a 1NZ engine. With the engine off reach down and grab the end of the air conditioning compressor and see if you can turn it manually by hand. This is the front plate part just in front of where the belt goes on the Pulley. It should be very similar to the picture listed below. If there is a one single wire connector going to the magnetic clutch disconnect the electrical connector and that would be the wire going to the magnetic clutch that you would apply 12 V to and you should hear the magnetic clutch engage. If there are two wires going to this connector right at the magnetic clutch then you would need to supply ground to one of the pins/wire and then another jumper wire and supply 12 V to pin/wire going to the magnetic clutch. This is basically electromagnet. If the clutch is clicking and you can manually turn the end of the compressor by hand then start the engine with the jumper wires attached at the electrical connector for the magnetic clutch then provide the power or ground or both with it running to see if the compressor makes noise and blows cold air. LINK1 LINK2
The air conditioning compressor is located directly underneath of the alternator and is on the right front corner of the engine compartment: right front being as you're sitting in the car.. If you were to remove the lower plastic splash tray you would see the compressor bolted to the bottom corner of the engine block.
sorry for the confusion.