2004 Toyota Solara Slow turning condenser fans problem

2004 TOYOTA CAMRY SOLARA
86,000 MILES • 4 CYL • 2WD • AUTOMATIC
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PASINI
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When I turn on the A/C both condenser fans turn at slow speed. If I remove the coolant temp sensor wire then both fans turn at full speed, but of course that makes the fan turn all the time. There are 3 relays, all works. Also I have checked the resistance on the temp sensor, looks ok.

Please help me to stay "cool".

Thanks
Jul 18, 2009 at 9:54 AM
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STEVEW84
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What problem are you trying to solve? A slow moving condensor fan? Are you sure there is a problem?
Jul 18, 2009 at 6:48 PM
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PASINI
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Steve, thanks for your reply.
I am pretty sure it should be turning at full speed, because the AC does not cool properly, if I get the fans to run at full speed it is chill cool.
Jul 18, 2009 at 10:25 PM
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STEVEW84
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how did you get the fan to run at full speed?
Jul 18, 2009 at 10:37 PM
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PASINI
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If I disconnect the coolant temp sensor plug both fans run at full speed. I think that signal is coming from the ECU to prevent the engine from overheating.
Jul 18, 2009 at 10:52 PM
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STEVEW84
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This is true. The PCM reads an open circuit in coolant temp. and then PCM turns both fans on as a fail safe.
Jul 18, 2009 at 10:57 PM
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PASINI
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Yes Steve, that means the fans controls (relays, connections, fan motors, etc) are working. Could you think of a place why it would run at slow speed?
Jul 20, 2009 at 7:24 AM
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STEVEW84
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some condensor fans don't run at a very high speed. A good way to test this is to start the car,turn the A/C on so the condensor fan comes on, and then test to see how much voltage you are getting to the condensor fan. If you are getting battery voltage (about 12.6-13.5) then everything is working normally.
Jul 20, 2009 at 8:56 AM