This guy really knows what he is talking about and explains why when you unplug your ETC sensor your fans run let's you know your relays are ok so you can look elsewhere for problems really appreciated this person

This video helped me alot. Was worried why my fan was not running and engine overheating. Will have to change the sensor. Thank you

Thank you so very much sir and may God bless you for your good works

I struggled for days and couldn't find the problem. but your video helped me a lot. Thanks.

Ang linaw ng english mo paps n gets ko kaagad salamat mbabalik ko na sa original yung fan ng auto namin nirekta kasi ng dting may ari thnks ulit

Thanks buddy. I try to google how it work. "It measures coolant temperature" yeah i got that from the name. This is what i wanted to know generally how it is supposed to work. Thanks again

Great vid.I did this to my '97 camry the ther day.using the normally open temp sensor.its not ideal if the sensor breaks i have no fans.but its working for now.

Thank you so much for giving detailed information by circuit diagrams

Very informative illustration , Thanks ..

Thanks. Nicely demonstrated.

Very informative.. I've learned alot from this video..

Thanks for your clearing and useful information 👍👍👍👍👍

Thanks, this video is really helpful 💐😊

Very awesome description. My issue is that when it gets to 90C, the fans aren’t kicking on. I’ve gone through 3 different ETC sensors, and I know the whole system works besides the ETC sensor because when I disconnect it, the fans kick on. 04’ SRT4 Neon for those wondering. 😄 I’m to the point where I either wire some kind of coolant temperature adjustment relay that bypasses the ECT, or just leave it disconnected with code 118. 😅

Great explanation. If my coolent temp sensor is bad would it disconnect power from my radiator fan. Thats the problem I am having. My car starts out with fan running then at some point the fan stops causing over heating. I am getting no codes at all.

Good luck බුදුසරණ .

That was an incredibly awesome explanation! Thank you so much for helping out by taking the time and giving a detailed explanation.

Good video thank you!

You are the best ❤

Good explanation, thanks bro , u solved my problem

Amazing work thank you sir

Awesome presentation

Thank you soo much. great! informative! How about the normally open engine coolant temperature sensor?

Well explained thanks

Thank you very much for your time

You’re the boss 🙌 💯

Hello thank for your clarification on the diagram. i have a question would like to ask you. i have a niss -xterra 2007 and the temperature heat is going up when i step on the gear 45mph. When i first start the engine the radiator fan didn't come on until 20mins latter the fan is on but the temperature gag still going up when the speed on 45mph. Please advise. Very appreciated so much!

Thankyou for sharing 👍👍

Hello sir, am glad to see ur channel. Pls I want to confirm if my Toyota Camry hybrid is ok. Am not a technician guy. I just noticed my radiator fan will not work on 84f but immediately I put on the car AC the fan pick up instantly. Plus I don’t no if it working above 90f but I will keep an eye on it. But my car temp gauge is always at the middle so it not overheating. Pls sir ur advise is needed. I don’t want to take it to a mechanic bcos here in Africa no trustworthy person even when ur car is ok they will still tell u d wrong thing just to take money from ur pocket. Pls ur advise sir !! Tanx

thanks for explaining it . i have an issue with my 2.0 mazda engine. i rewired a new relay but i cant get it to cycle right. im using a 4 pin relay. and does my main relay also power my AC fan or is it na ?

Sir in your description above should we say the problem is the sensor? if not operating on its own?

Thanks, I'm still confused with mine...I have a 99 Toyota Rav 4 which the radiator high speed fans are not coming on as temperature rises past 220 deg F. The low speed fans will come on if I turn on the A/C. The high speed fan will only come on if I disconnect the "Radiator fan switch sensor" I replaced this sensor initially thinking it was bad, but still doesn't work. I then replaced the relays, still not working. And finally I replaced the "Coolant Temperature Sensor" and it still doesn't seem to be coming on. I did notice after replacing the sensor with an aftermarket that the readings on the gauge cluster are lower than before if that means anything. Any ideas what to try now? I'm frustrated and lost with what to do now. The only way I can get the car to cool down when driving is stick the heater on hot and fan on high to lower the temp gauge...UGhhh

thank you my question is answered

Very educative! I notice that my Honda civic 2006 cooling fan does not switch on when ect2 sensor is connected ( i.e when both ECT1 and ECT2 are connected) but switches on at 96 degree Celsius when ECT2 sensor connector/plug is removed. what could be the reason/cause? I have experimented this on different occasions and noticed even at 98-degree celsius - 100-degree celsius, the colling fain doesn't switch on when ECT2 sensor is connected. I have replaced the ECT2 sensor with OEM but the issue still persists. Do you have any clue about how I can resolve this issue?

My Toyota Tercel fan relay has only 4 prongs (no 87b) , when I start the car where does the positive (+ ) charge go since there's no 87b or open loop circuit?

Thanks so much for the knowledge you shared to us..my car is giving me same problem what do I do to make the fan work properly,do I remove the socket completely or change the fuse?

Thank you ✌️

Thank you for the information sir. Regardless of opened or closed loop, the sensors should have about 2000 Ohms right? If closed loop sensor does not show about 2000 Ohms, can i assume it is bad sensor and needs to be replaced?

I have a 2001 nissan xterra I am going to change from clutch fan to electric fan can i connect the hi fan negative cable to the temperature sensor which is controlled by the computer instead of acquiring a temperature hit sensor to place it on the radiator????

do you have 2015 camry 4 cylinder fan coolant diagram ? my fan do not come on checked everything still have no power to fan

Thanx very good

Me gustaria saber algo para comprender mejor, usted explica que ese sensor en frio mantiene esl circuito negativo en continuidad y al calentar a 90 grados este habre el circiuto y nompermite el paso negrativo a cable de salida. Mas claro, el en frio mantiene el negativo circulando y en caliente interfiere el paso de ese negativo. Si le hago esa pregunta es porque en mibtiyota pasa algo muy extraño,el fan se activa de tan solo habrir el swicht, al rele le llegan dos power pero punto 3 y 4 de rele siempre se mantienen en circuito cereado, lo unico que interfiere esa continuidad es cuando se activa la bobina puntos 1 y 2, por el.punto dos llega corriente pero la tierra del 1 no le llega y algo tiene que ver con ese senor ( es nuevo ), ya que a el le llega un negativo fuerte y el auto caliente el otro cable señala power pero al pare er parasita ya que solo alumbra rojo similar al punto 1= 85 Si le palicamos por el cable de.retorno del sensor negativo, se activa el electroiman y apaga el fan pero como.no tengo el.plano electrico del auto, no puedo exactamente decir que su ede y quien esta en dificultad El carro es un toyota camry del 96.

Thank you sir,

Wait please, my 2013 impala stated running the fan soon as I started the engine, so I unplugged the connector to the sensor to see if the fan would stop running, but didn't stop running , so I connected a new sensor to the connector with out installing it and the fans kept running, does the sensor have to be grounded? Also I get a warning that says engine hot a.c. off

My Honda has a coolant fan switch? And a coolant temperature sensor? I replaced cooling fan switch which reads coolant and triggers fan, I thought, the cooling fan isn’t coming on so should I replace the coolant temperature sensoralso ? Because I can keep my car from overheating if the ac is on because the cooling fan stays spinning. If I turn that off my car begins to get hot and my operating temp appears to be right under half

The point i got is the temp sensor is normally closed and giving negative field to the relay so make it un_active

it explains my situation well in which I pull out sensor, the fan activated, but why there is disconnection when the temperature rises? I notice that when the temperature increases, the resistance between pins of temperature sensor decreases.

I did found this useful tha ks

thanks man I want to make the 2 fans works on high speed all time what I have to do ?

Very good explanation i actually have a problem my fan runs constantly when start up car i have replaced ect sensor and relays but it still runs any idea what it could be .

Ayos Lodi

Hello, my 07 nissan maxima second speed radiator fan only working when my water tank is empty,relay still ok, i replaced new coolant temperature still not working on normal ride and the water is boiling in the tank,what should i check/do next?

Bravo extra

Thanks. I have a question the engine temperature sensor. Is the same as coolant sensor switch? Having problems with my civic 2003 fans are not working. I changed the thermostat coolant switch sensor. I homped from the switch and fans worked. and looks like relays. Are good and fuses. I don’t know what else to look for? Any help please.

Very informative sir. Just want to ask if this car is ECU controlled? And how can i know if my ECT sensor is normally open or normally close? I own a lancer 1997 btw. Thanks. More power

What is the connection with the ac and coolant sensor and fan?

Thank you

Ok i have a 97 toyota camry 2.2 and my fans do as they are supposed to do but when the car is at operating temperature and i turn on my heater/ a/c the fans start up and when this happens the idle goes way down and almost stalls and then idle fine, the fans will stop when i turn off the heater, i am lost and wonder if there is something wrong? And idea and advise would be appreciated, thank you.

Thanks you

thanks bro

Thanks, but i have a clarification to make. Questions that needed answer sir. I have a ford eco sports automatic. That when i start the power button the engine and radiator fan activated and it turns to high speed fan that cannot control even if the temperature is in very low and when i off the engine, it will deactivated. But if i start the power switch w/out turning on the engine, the fan will still activated even if i turn off the a/c button. Pero yung aircon temperature walang problima, yung fan lang sobrang High kahit nasa pinaka low na. Sana masagot mo sir yung tanong ko, especially sakin na hindi pa familiar sa mga cars. Thank you.

And where do you connect the temperature gauge to see the engine temperature on an old cvh ford

Fest thanks so mach bro what is Quality car fan

Those this system connection work same for Dodge Journey ?

Thanks

Hi. My ford fiesta the radiator fan comes on when temperature is 111 degrees Celsius and goes off when the temperature reduces to 110 degrees is this normal because I feel it comes on very late. Any idea

This is interesting but l thought the engine temperature was being measured by this sensor too. Is that not correct? Anyway good video.

Of course, if the Relai also fails, it can cause a problem identical to that of the probe.

I'm not getting power to my coolant temp sensor at the radiator. It show -40 on my scan tool. I've tried 3 sensors. I do get a ground on one side when I test it with my power probe. The engine coolant temp sensor on the head does read normal. I've change every relay just in case. I've even tried a new connector. any help Thanks

I would assume the temperature sensor is normally open and it closes when it reaches high temperature and connect the poles giving continuity to send signal to relay . Isn’t it ?

Thanks , What is the diagram of a fan that works when the air conditioner is on or when the engine temperature is high?

Hi I have the same problem on my qashqai j10 the fan doesn’t work, it just works when I disconnect the sensor? Is that rele error or sensor ? Pleas help me

My radiator fan only kicking at 98°C. I have P0115, its either the ETC sensor or Thermostat. But already test the ETC sensor is ok, so after flushing the cooling system, i will change the Thermostat.

Interesting, but I'm curious about your fan relay. In a typical relay, both terminal 87s are supplied with 12V once the relay is switched on since they are just parallel circuits. If that's the kind of relay that is used, your illustration is for a normally open temperature sensor.

Hello 👋 Sir I have ZEN Car model 2002 check engine light found on display,not reset but engine performance is still working properly .Please guidance on how it works out for reset 🙏

Why do 2003 Pathfinders 3.5 engine overheat? Is it the other thermostat under the intake manifold? Thank you

Bro i have a problem with my lancer i have 2 fans it only works when i turn on my AC. But when i turn off my AC it will turn off both fans. Even my sensor reaches 90. Degrees fahrenheit the coolant. Can you give me some advice ? Salamat bro!

Where do I add bypass switch if I want manual overide

Is this the same as cylinder head temperature sensor

Fan is not working when heating up. Also when i put direct fan with battery it works. What would be the problem?

I changed temperature sensor in my Mitsubishi minicab but radiator fan continuesly working when i start the engine in the morning .

Good day why will my 2006 shevrolet spark engin fan then runs as soon as I start the car even when the engin is cold.

sir i have 3 pins ect which wire going to relay

What is the solution? Do we need to change the sensor? Thank you

Excellent

Which means still the problem is that the sensor?

in easier term. the sensor like a thermostat. the circuit will be continuous when reach a certain temperature. the relay is kinda hard to explain. better look at better relay picture like fog lamp relay. same rules

My 2001 chevy cavalier is overheating because cooling fan is not working at all I already put new ECTS and new radiator I checked all the fuses and relay with test light Cooling fan only works when I use jumper wire in relay terminals 30 and 87 Can anybody help me

Sir. The sensor should be close let the fan working but why take of the sensor the fan thanks

What kind of car is it

Sir, My car radiator fan starts at 97 to 98 temperature, and when Start and becomes 92-93 it off and on again at 97-98 . This is good condition or not

whn i switch on d ignition switch hindi gumagana ang fan, gumagana lang cya kapag sini switch-on ko ang aircon, what does it mean? nag stay lang cya palagi sa 87? di cya nag switch sa 87a?

baket ung rad fan kpag nag auto on n, ndi n cy nag auto off. 2e engine..

I have problem with my car when AC is on cooling fan is always on never stop until i switch off the AC

I am confused what's showing for what is point what's one is need to change

Soo in this case what’s wrong is it the temp sensor or the Relay

My radiator fan won't come on even when is 190f, but when I pulled the connection of the sensor switch the fan will work. What do you think the problem? please help ..

Great info. But too much "ahhh"

Kulang demo. Sana pati ung papunta sa gauge ng temp.

ah ok,,thats the reAson y if sucket removed aux fan will on