which componant triggers cooling fan to bring the temperature to optimal level?
Sep 9, 2011 at 4:05 PM
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PROMECHANIC
CAR REPAIR CONTRIBUTOR
536 POSTS
There are a couple of things. The computer gets a reading from the temperature sensor then sends power through the cooling fan relay to turn on the cooling fans. Most of the time it is a problem with the relay, but it could be the cts or the pcm.