Question about 1994 Toyota Camry
Only when my A/C is on the radiator works other then that it doesn't work. what could be the cause of this?
There are actually 3 temp sensors. 1 is on the top of the engine that goes to temp gauge in dash has 1 wire. next to it is a 3 wire sensor for engine control and choke. on the bottom of the radiator next to the hose is a 2 wire sensor. loosen all 3 but leave connected. get engine hot past halfway point on dash gauge. with ac off disconnect 1 sensor at time. start with 2 wire under radiator. it takes the most abuse. fan will come on when you disconnect broken sensor. 2sensor must agree for fan to stay on till engine cools when turned off. note this is solution i used after verifying fuses, fuseable links and relays worked.WOO HOO! make sure you check both the fuse box under hood and fuse boxleft side of steering wheel my ECU fuse was inside my bros was outside.ECU B on my car goes to nothing and is under hood. Had it confused with ECU on wiring diagram.DOH!
Posted on Apr 03, 2009
The Radiator fan will only engage if the engine is above a certain temperature, with one exception, it will run continously with the AC. If the Fan works with the AC you can be assured that the fan works properly. Unless your car is overheating, it is simply not getting hot enough to need the fan.
Posted on Jan 18, 2009
Ok I have same problem with my 94 camry 2.2 automatic ,I put new radiator replace,cooling sensor under and top of engine housing sensor,,,y replace the relays and still my fan don kick ON,,,,i replace the ECU brain (computer) and my fan works just fine
I have same problem on my 94 Honda civic fan no come on and car die right after get hot ,,,,,,,,,I did replace ECU computer and work fine,,,,,.......see on Hondas ,computer kill the car to evoid overheat,,,,Toyotas are a little diferent but some times take you to same point ,,,,,thank you
Posted on Dec 18, 2013
The Normal Temperature Range to the Fan Start is: A/C ON 181 F.
A/C OFF 199 F. When the Engine Reach this Temperature the Fan should start.
OK. Do this simple test.
1---- Start the engine, Desconnect the ECT Switch located on the Radiator,
See if the Fan come ON. If yes, if not go to step #2
Connect the ECT SWITCH and leave the car Running and with a Temperature gage.
See the temperature, if the Temperature go more than 199 F.
Turn the Engine OFF.
Disconnect the ECT sensor and check for Ground at the WHITE/BLACK wire.
If ground exist, Replace the ECT switch.
But if not. Check the wire for any damaged, and the ground at the Front Left Fender.
Repair as need.
2---- check the Fuse link RDI FAN . 30 amp.
Check the Fuse link CDS FAN 30 amp.
Replace if need.
And Return to step # 1.
Check the Radiator fan Relay, Rad fan relay 2 and 3. Replace if need.
Ok. I hope this help on your question.
I can give to you the WIRING DIAGRAM of the Fans, But I need a E-MAIL adress to do that.
Thank you for use fixya....
Posted on Sep 25, 2008
they probably had to disconnect the a/c condenser to remove old radiator and failed to reconnect it when the new one was installed. a/c won't work without it. i would make it their problem, it's not your fault. if they also caused your system to lose freon charge they should make that right too. the condenser is a little flat thing in front of the radiator, sort of looks like a radiator itself. refrigerant lines will run from compressor (it's a round belt driven thing mounted to front of engine) to condenser. they either didn't hook it up back up or somehow damaged it is my guess. hope that helps
Posted on Jun 15, 2009
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Posted on Jan 02, 2017
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Hello and welcome to FixYa!
If you have overheating problem, it can lead to multiple
issues. You may be running on low coolant that's why the vehicle overheats. If
that's the case, please add coolant and make sure that it sits on the right
level, too much coolant can cause overheating too for coolant will overflow.
The vehicle may have a faulty or worn out radiator blower
motor that's why it overheats. If that's the case then you will need a blower
motor replacement to resolve the issue.
If the radiator is clogged with dirt and rusts this issue
occurs too. The coolant doesn't flow normally on the cooling system if it's
clogged. If that's the case, I strongly suggest that you have the radiator
flushed to drain out dirt and rusts. If you think that the radiator served you
enough then it's better to have it replaced.
Please do check the radiator hoses, If you have worn out
hoses it can cause coolant leakage which can result to overheating. A tiny hole
is good enough for the vehicle to overheat.
A faulty thermostat sensor can cause the issue too. If you
have worn out thermostat, the fan may not trigger that's why the fan won't work
when under stressed conditions. A blown radiator blower fuse can cause this
issue too so I suggest that you check the radiator blower fuse and replace it
when necessary. What causes the radiator blower fan fuse to blow? It's because
of a failing radiator blower motor, If that's the case have the radiator blower
fan motor replaced.
If the fluid in radiator doesn't circulate then it means
that you have a blown head gasket or a faulty water pump. I suggest that you go
for the water pump replacement first specially if you think that it's near the
end of it's service life. Usually, water pops out the radiator when engine is
reved (a sign of faulty water pump and possible blown head gasket).
Hope you find this information helpful enough and thank you for using FixYa! Have a good one!
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