How To Replace Coolant Temp Sensor Toyota Camry RAV4 Celica 3S-FE -Jonny DIY

How To Replace Engine Coolant Temperature Sensor. Toyota Rav4 Camry Celica MR2 3S-FE Motors. Fixes Poor Idling, Misfiring Etc.
Tools/Supplies
ECT Sensor- amzn.to/2HGzAh2
170 Piece Mechanics Tool Set- amzn.to/2xoyu5c
Safety Glasses- amzn.to/2ez41Jw
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[@JonnyDIY]

*Tools & Supplies Used* ECT Sensor- amzn.to/2HGzAh2 170 Piece Mechanics Tool Set- amzn.to/2xoyu5c Safety Glasses- amzn.to/2ez41Jw Nitrile Disposable Gloves- amzn.to/2w0dlwc Mechanics Gloves- amzn.to/2w0i1SP *Thanks for Watching! Help Support the Channel by Subscribing & Clicking the BELL Icon for all NEW Videos!*

[@andrewfong7204]

Just changed mine out thanks to your video man, love all your RAV4 videos, they’ve been super helpful.

[@JonnyDIY]

Awesome, nice job 👍 Thanks so much, happy I can help 🙌

[@YuthyiaSounVideo]

That's what my car symptom, engine turn off but can restart immediately and fine. I'll check this out. Thank a lot and please keep it coming. I own the RAV4- 99 in Cambodia.

[@JonnyDIY]

You're welcome, good luck 👍

[@fereshtehj1865]

Also try daily vloging! Im sure everyone will love it!

[@TheMagicads]

Jonny, great job on the video! Keep up the good work.. I am helping my dad with his 1997 RAV4 that has cooling fan issues. I have replaced fan relays 1,2,&3 along with ETC like on your video (I did drop the washer you warned about) I also replaced the lower fan switch and I am still having these symptoms. Cooling fan does not come on at appropriate temp time, when car is below this temp the AC when switched on will turn on both fans until it reaches the hot temp that is supposed to turn on cooling fan but instead none work? Any suggestions?

[@JonnyDIY]

Thank you. No fan runs until you get up in temperature then 1 fan should run. Both fans should run when ac is on. There is another coolant sensor for the fans at the bottom of radiator, if you havent replaced that Id check that. If thats not the problem then Id replace the cooling fans because it sounds like youve gone through fuses and relays and checked wiring

[@TheMagicads]

Correct, no fans run until I turn ac on.. when ac is on then both do come on as normal. The normal stops when the car reaches temp that would normally trigger the one cooling fan to turn on but doesn’t as well as stopping the previous normal ac two fan function at the same time leaving no fans working until turning off the car and the car cools back down below the normal range. I did replace the fan sensor at the bottom of the radiator just to be sure, the relays I replaced also just to be sure and it was cheap enough, not because they were all no good. I am still scratching my head on what could turn off the AC fans at the temp that should but doesn’t turn the single cooling fan on?

[@JonnyDIY]

Should be the sensor in radiator, double check work and wiring. Check all fuses in engine bay as well. If all thats good, it could be the whole fan assembly that needs replacing

[@deb-smartech]

Hi Jonny, I have a Toyota Corona 1993 that I replaced the old radiator with a new one and replaced the "radiator Sensor" that is under the radiator, it looks the same to the one you replaced "ect sensor" Im facing the problem that the fans wont start, wont turn on, if I unplug the new changed sensor located under the radiator both start but they stop as soon as i plug in the sensor. Maybe I should change the ECT sensor the one you replaced to? my car starts ok no problem but Im dealing with this situation, tomorrow will check the Relays and fuses. Thank you for any advice. Great video by the way.

[@JonnyDIY]

@@deb-smartech sounds like a good place to start. Fuses, relays then sensor. May be able to test sensor with multimeter to see if bad. Not sure of parameters but should be able to find with Google search or just roll dice with new sensor. Strange it would go bad same time replacing radiator unless it was bad before causing overheating issues?

[@sergiov.dominguez321]

Great video 👍 help a lot 👌

[@JonnyDIY]

Thank you, happy to help 👍

[@Anonymous-sj2sr]

Hi, did this solve the problem with the rev being unstable when the car is cold?

[@JonnyDIY]

It helped among some other things like cleaning the throttle body, and oddly enough I believe I had a transmission leak one time and it mimicked same thing being low on transmission fluid

[@fereshtehj1865]

Really like the videos dude! Keep it up :)

[@JonnyDIY]

Thanks Fereshteh! :)

[@bcoronel01]

Hi. Is the coolant temperature sensor on the opposite side on the 2000 rav 4?

[@JonnyDIY]

Would think it would be in same place, engines are the same til 2000

[@bcoronel01]

@@JonnyDIY I wish I could show you a picture of my 2000 engine. The thinner sensor is closer to the engine and the fatter sensor is to the right side of the first one. Also the radiator hose ends with the fatter sensor right in front of it. The one you showed is a little different. I guess the fatter sensor is the coolant temperature sensor

[@JonnyDIY]

@@bcoronel01 yes its the bigger of the 2 sensors, smaller one being the one for the dash temperature gauge 👍🏻

[@eduardobarrientos9405]

@@JonnyDIY on a 2002 rav4 my temperature gauge isn’t reading

[@marizadomingo2271]

good

[@JonnyDIY]

Thank you!

[@ehh7992]

no lo tienen en español gracias

[@mattlambert5079]

My gf’s 97 RAV4 is still overheating after installing new thermostat, water pump, ECT Sensor. Any suggestions, or any part numbers for the other sensors, like the smaller one for the gauge to the right of ECT???? Thanks in advance!

[@JonnyDIY]

I would think its probably the radiator itself then and or cap. Also make sure both fans working properly and coming on with AC

[@mattlambert5079]

@@JonnyDIY FYI, ended up being a failed head gasket, a leak at the radiator, & a possible cracked head. Only determined the problems after requesting a block test. Wouldn’t know for sure about the head being cracked unless she went ahead with the gasket repair, which she’s not going to do. Would end up in the thousands…

[@JonnyDIY]

@@mattlambert5079 ohh boy yeah its a big job, I did it with this car once after it blew a hose, overheated and blew the headgasket. Sorry for the bad news, but at least figured it out

[@luckymutibo9848]

Can it stop the engine from starting altogether if it goes bad?

[@JonnyDIY]

No I don't think so, I would start with battery/alternator/starter if it's not starting

[@gvick15]

I have an intermittent operating Air conditioner on my 1996 RAV4 but Aircond service guy says Aircond systems and gas is all good so it has to be something to do with the car cooling system. When I the a/c is intermittent I hear a clicking sound near the driver side firewall. What could be the issue and what should I replace?

[@JonnyDIY]

May be the a/c pressure switch. Hmm if the clicking isn't just the a/c clutch kicking on and off may want to test the relay for the a/c

[@gvick15]

@@JonnyDIY the relay for AC compressor I replaced it but problem still there and also when I bypass the relay the a/c works well but that’s not the solution. So is there an a/c pressure switch near the driver side firewall? Next I also notice both the fans in front start to run the moment I turn on the ignition.

[@JonnyDIY]

@@gvick15 if both fans coming on automatically with the A/C on and engine Cold Id say its the sensor that reads the coolant temp. The last thing it could be is the compressor is just going out

[@gvick15]

@@JonnyDIY even when the a/c is off the fans run. As long as the ignition is on. Ideally one fan should run with a/c on and another should run when temperature of coolant rises right?

[@JonnyDIY]

@@gvick15 yes correct, seems as if it's stuck in some sort of automatic bypass and is running both

[@chooocoooleeezhang1251]

hey! man i need your help i just change my ECT sensor but my fan still not working but when i unplug my ECT sensor cable my fan is working.

[@JonnyDIY]

Could be a bad new ECT sensor. Try another one and if not we know its not the fans or relay or fuse since its kicking on. Could be computer ecu. Try another ECT sensor first and make sure its wiring is good

[@fercruz177]

Check your fan relays it may be stock together and won't open or close. Good luck men.

[@420BLUNTLEY]

Mine is sending me a cold signal. It won’t get higher. It is a 1999 rav 4. Do you think this could be the solution. ? Please let me know.

[@JonnyDIY]

Possibly yes. Whats the coolant gauge reading? Possible the thermostat stuck wide open too if car isn't warming up

[@420BLUNTLEY]

@@JonnyDIY reads low.

[@JonnyDIY]

@@420BLUNTLEY well you can test the thermostat by boiling it to see if open and closing correctly. Then youll know if its that or could actually be the coolant temp sender for the gauge that has gone out. Thats the one next to this one

[@420BLUNTLEY]

@@JonnyDIY also When it is idling stationary, it will get up to the Middle range of the temperature gauge. But when moving, it runs on the lower side. I don’t think it has very hot heat either.

[@JonnyDIY]

@@420BLUNTLEY sounds to me like either a thermostat or radiator. I'd swap both out if radiator old and I bet it solves issues. As long as fans are operating and pushing good airflow at idle

[@Commenting800]

I have 1999 Rav4. And the fans are constantly running the moment I start the car. Could that be the same sensor?

[@JonnyDIY]

Possibly. I would first make sure all connections are good with the wiring coming from fans. Then I would check the sensor at the bottom passenger side of radiator (most likely culprit) 0:40 . Then Id check this ECT sensor. Also check relays.

[@Commenting800]

Thank! I removed the connector from the temp sensor and the fans continued to run, but I haven't tried to check the sensor you mentioned. I was going to check the relays first. Can you name the connections that I need to check? (I'm not too savvy when it comes to the mechanics of cars, but trying to learn)

[@JonnyDIY]

I would check the 2 sensors first. You will need an ohms meter to test.

[@Commenting800]

I don't have the OHMS meter. But I was trying to disconnect the connector that goes into the sensor on the radiator. I wasn't able to, but somehow all that yanking fixed the issue! what do you think that's about?

[@JonnyDIY]

Well hopefully that did it. Must have been a bad or loose connection. Or all the yanking maybe made the sensor work again. Just keep an eye in it. If it starts up again its probably just sensor going out. Cheap to replace either Autozone or Rockauto.com has great deals on replacement parts

[@blacktopmedia]

Hey what's the plugs that's unplugged on the top right supposed to be connected to? 0:41

[@JonnyDIY]

Not sure, think was just an extra plug for optional lights maybe. I didnt unplug it, was always like that

[@Albert-rg5qi]

went from 📈📉

[@JonnyDIY]

Can never make everyone happy 😄🤙🏼