Question about 2006 Toyota Sienna

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My van keeps overheating on me and turn off automatically I have to wait a good while for it to turn on

Where is the radiator blower located at ?

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  • Rodman Fenton
    Rodman Fenton Apr 13, 2014

    The radiatir fan is located behind the radiator between the radiatorand the engine.some Sort of a temperature sensor controls turning the fan off and or on at the appropriate engine temperature.I would visit the Toyota parts department and simply ask if the stock the sensor that peratesthe rad fan.if they have it ask to look at it.Its visual appearance will give you a clue as to what it looks like so that you can possbly determine how it turns on the fan and it will also allow you to look for it on yur engine.If you bypass It (short it out)and the fan turns on(with the key on)than the sensor is the problem.Leave it shorted and drive the car...If the overheating stops a new sensor is required....If this does not help google "mitchells manuals...pay the 15 or 20 bucks for your make ,model,and year and yuo can read wiring diagrams for your fan and all else you wish to know about your toyota

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  • 46 Answers

Is there any coolant in the motor. These radiators were a problem for leaking. Also by turning on the AC should turn on both fans.
make sure you get an OEM rad part # *****-*YZZ*-84 or something like that. As it is cheaper. $400 Canadian $$

Posted on May 04, 2014

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Posted on Jan 02, 2017

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SOURCE: my van overheats and turns off automatically

You should have 2 cooling fans in front of your radiator. These are controlled by the computer. You have a temp sensor that tells the computer when to turn the fans on and off. Your problem could be this sensor. If it quits working properly and lets the engine heat up then the computer will shut off the engine to save the engine. When it cools down, you can start it again.

Posted on Apr 13, 2014

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Hello and welcome to FixYa! If you have overheating problem, it can lead to multipleissues. You may be running on low coolant that's why the vehicle overheats. Ifthat's the case, please add coolant and make sure that it sits on the rightlevel, too much coolant can cause overheating too for coolant will overflow. The vehicle may have a faulty or worn out radiator blowermotor that's why it overheats. If that's the case then you will need a blowermotor replacement to resolve the issue. If the radiator is clogged with dirt and rusts this issueoccurs too. The coolant doesn't flow normally on the cooling system if it'sclogged. If that's the case, I strongly suggest that you have the radiatorflushed to drain out dirt and rusts. If you think that the radiator served youenough then it's better to have it replaced. Please do check the radiator hoses, If you have worn outhoses it can cause coolant leakage which can result to overheating. A tiny holeis good enough for the vehicle to overheat. A faulty thermostat sensor can cause the issue too. If youhave worn out thermostat, the fan may not trigger that's why the fan won't workwhen under stressed conditions. A blown radiator blower fuse can cause thisissue too so I suggest that you check the radiator blower fuse and replace itwhen necessary. What causes the radiator blower fan fuse to blow? It's becauseof a failing radiator blower motor, If that's the case have the radiator blowerfan motor replaced. If the fluid in radiator doesn't circulate then it meansthat you have a blown head gasket or a faulty water pump. I suggest that you gofor the water pump replacement first specially if you think that it's near theend of it's service life. Usually, water pops out the radiator when engine isreved (a sign of faulty water pump and possible blown head gasket). Hope you find this information helpful enough and thank youfor using FixYa! Have a good one!

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If you have overheating problem, it can lead to multiple issues. You may be running on low coolant that's why the vehicle overheats. If that's the case, please add coolant and make sure that it sits on the right level, too much coolant can cause overheating too for coolant will overflow.


The vehicle may have a faulty or worn out radiator blower motor that's why it overheats. If that's the case then you will need a blower motor replacement to resolve the issue.


If the radiator is clogged with dirt and rusts this issue occurs too. The coolant doesn't flow normally on the cooling system if it's clogged. If that's the case, I strongly suggest that you have the radiator flushed to drain out dirt and rusts. If you think that the radiator served you enough then it's better to have it replaced.


Please do check the radiator hoses, If you have worn out hoses it can cause coolant leakage which can result to overheating. A tiny hole is good enough for the vehicle to overheat.


A faulty thermostat sensor can cause the issue too. If you have worn out thermostat, the fan may not trigger that's why the fan won't work when under stressed conditions. A blown radiator blower fuse can cause this issue too so I suggest that you check the radiator blower fuse and replace it when necessary. What causes the radiator blower fan fuse to blow? It's because of a failing radiator blower motor, If that's the case have the radiator blower fan motor replaced.


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Stuck closed thermostat.

Cooling fan not coming on.

Clogged radiator.

Low on coolant.

Water pump failing/leaking.

Head gasket blown, leaking exhaust into antifreeze.

Clogged catalytic converter.

Thermostat: If the Van heats up, then feel the upper radiator hose. If it's cold, then your thermostat is closed. Replace thermostat.

Coolant: If low, simply fill with distilled water and coolant. Low levels will let engine over heat.

Radiator: If there are cold-to-the-touch spots on the radiator after it should be warmed up, then a clogged is probably occuring. Have radiator flushed.

Head Gasket: If you smell exhaust fumes in your coolant reservois tank, then you got a blown head gasket.

Cat Converter: Only can be tested if off the car. Or you could try a non-contact thermometer. These are also good to testing cold spot on radiator or if thermostats are open.

Cooling fan: If mechanical it'll be spinning. If electrical, it should come on automatically with the A/C, or when it gets hot.

Water pump: Will be leaking from the front if it needs replaced. On a van, it's a tough job.

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Hi,

Most normal causes for overheating would be:
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Should your particular vehicle be using a radiator fan with clutch, that could also cause the fan blades not to spin even if the fan motor is turning.

Pls check the above mentioned components.

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