Overheating problem at when not moving

[Mike_95]

Hey everyone,

My usually very reliable '95 is overheating at when Im not moving. The fans are not kicking in.

When everything is working right, when do they come on? Do they always come on together?
Advice on where to look first? Id think fan relay...

Thanks - awesome forum!
Mike

[poiter_mcd]

check the thermostat - it comes on when the engine reaches a certain temperature

cya
Poiter

[toyomoho]

Both fans should kick in at about 199F. Does the A/C fan run when you turn it on?

There is a temp sensor for the coolant fan system at the bottom rear of the radiator.

Download the Gen 3 wiring diagrams from the link below and find the info on the cooling system.

http://www.camrymanuals.com/

[Eye8Pussies]

fan relay and fan fuse

if your fans aren't coming on, then that's your problem.

[Mike_95]

Relays sounds right.

Both fans seem to be not activating (AC and cooling), but it seems they are on separate relays. Ill study the wiring more and see what to mess with.

Mike

[rusty9]

unplug the coolant temp. sensor on the coolant outlet on the top drivers side of the block next to the head. theres 2 sensors there, 1 wire plug is for the sending unit for the dash gauge, the 2 wire plug is the temp sensor. if you unplug that and the fans go on then that means that sensor is no good.

there is also a secondary sensor at the bottom of the radiator, as mentioned above. and of course the fan relay and fuse. they are easy to test with the instructions provided in the repair manual.

[BAGGEDCAMRY01]

listen to toyo. i know he's pretty good. he helped me out when my fans went out. and it was the temp sensors for the fans.

[alltracman78]

Originally Posted by rusty9

unplug the coolant temp. sensor on the coolant outlet on the top drivers side of the block next to the head. theres 2 sensors there, 1 wire plug is for the sending unit for the dash gauge, the 2 wire plug is the temp sensor. if you unplug that and the fans go on then that means that sensor is no good.

there is also a secondary sensor at the bottom of the radiator, as mentioned above. and of course the fan relay and fuse. they are easy to test with the instructions provided in the repair manual.

Check this out first, normally it's the switch [it's not a sensor, it's an on/off switch].
There is no "secondary" sensor for the fan however, the only switch is on the coolant elbow.

If unplugging the switch turns the fan on, it's the switch.
If not, it could be the relay or AC pressure switch.
Other than that, it's either the fan motor or something else in your wiring.

[alltracman78]

BTW, the AC fan is on a separate circuit.
It only comes on with the AC.

[thrasher]

Originally Posted by toyomoho

Both fans should kick in at about 199F. Does the A/C fan run when you turn it on?

There is a temp sensor for the coolant fan system at the bottom rear of the radiator.

Download the Gen 3 wiring diagrams from the link below and find the info on the cooling system.

http://www.camrymanuals.com/

1999 Camry. I'm having the very same issue: neither of the radiator fans are coming on. The fans should come on if I unplug the coolant sensor for the coolant fan system? Looks like the connector is at the top (drivers side) near the radiator. How do these connectors come apart? They are light gray in color. I don't want to force it apart and break it.

Can't completely download any of these Pdf files at camrymanuals.com. The first page downloads then it times out after about 5 minutes. I'm on a cable connection so its plenty fast. Perhaps the website is having problems? Each one of them is doing that. Strange.

Thanks!

[dc_98_cam]

Originally Posted by thrasher

Can't completely download any of these Pdf files at camrymanuals.com. The first page downloads then it times out after about 5 minutes. I'm on a cable connection so its plenty fast. Perhaps the website is having problems? Each one of them is doing that. Strange.

Thanks!

One way around this problem is to use a file download program such as GetRight. Install and activate the Drag and Drop button. Then just drag the desired link over to the button and save. ... Fairly straightforward.... GetRight is voluntary payment .... I paid something years ago. .... Fairly solid program. ... If you use the Firefox browser, you might have to install a download manager such as FlashGot. .... Still, it's a fairly simple setup.

[thrasher]

Originally Posted by dc_98_cam

One way around this problem is to use a file download program such as GetRight. Install and activate the Drag and Drop button. Then just drag the desired link over to the button and save. ... Fairly straightforward.... GetRight is voluntary payment .... I paid something years ago. .... Fairly solid program. ... If you use the Firefox browser, you might have to install a download manager such as FlashGot. .... Still, it's a fairly simple setup.

Just using plain vanilla IE 7. That worked nicely. Thanks.

I think I got it figured out. Unplugged the coolant temp switch (at bottom of radiator) and both the fans came on, so it must be the switch itself.

Sure helps when you have the repair manuals to look at.