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its the engine coolant temp sensor. its located behind the intake plenum, close to the firewall there are other sensors and a temp. vacuum switch in the same aluminum casting. the one you want has a green plug.

The CTS (Coolant Temperature Switch) is a normally open switch with impedance range for degree measurements on the gage. By grounding out the single lead to the CTS, the gage should peg out to overheat condition - but it should also send a signal from the computer that temperature requirement has been achieved. Unfortunately, this is not the answer.

The transmission FTS (Fluid Temperature Switch) which is located near the tail-shaft of the transmission is the smoking gun about 75% of the time. The other 25% are shifting solenoids and their respective components. Good Luck

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โˆ™ 2012-02-08 15:58:11
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Q: 95 Toyota 4 Runner with 3.0 where is coolant temp sensor that is responsible to allow automatic transmission to shift into overdrive once engine is up to temperature and what is that correct temp?
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