Engine Cooling Fan not working on 3SGE motor Options

[Racer_J]

Hi guys,

Does anyone know how to fix a non-functional engine cooling fan on a 3SGE motor? Or even what could be causing it not to come on when the engine gets hot? Sick of using the interior heating to cool the engine down when in traffic!


Cheers



This post has been edited by Racer_J: May 17, 2007 - 3:25 AM

[scothaniel]

There's no sensor on the thermostat housing for the 3SGE motor, thats only on the 7A motor.

The AC condenser fan should always have power, and the relay supplies a ground. If there's no power at this fan, then its the CDS fuse.
If it has power, pull the #2 fan relay and make sure pin #4 on the fuse box has a good ground signal and pin 3 has power. Then jump pins 3 and 4, this should start the fan (and means the relay is bad).

The radiator fan is a little different, but the relay operates the same way. Pull the #1 fan relay and verify that pin 3 has power (which is coming from RDI fuse) and pin 4 has a ground (which is going through the fan). Jump these two wires and the fan should start.

[Racer_J]

There's no sensor on the thermostat housing for the 3SGE motor, thats only on the 7A motor.

The AC condenser fan should always have power, and the relay supplies a ground. If there's no power at this fan, then its the CDS fuse.
If it has power, pull the #2 fan relay and make sure pin #4 on the fuse box has a good ground signal and pin 3 has power. Then jump pins 3 and 4, this should start the fan (and means the relay is bad).

The radiator fan is a little different, but the relay operates the same way. Pull the #1 fan relay and verify that pin 3 has power (which is coming from RDI fuse) and pin 4 has a ground (which is going through the fan). Jump these two wires and the fan should start.

Thanks for the info.

Neither of the fans work, even with the aircon switched on. If I wire the fans directly to the battery, they work so I know they are OK. I've been told the sensor in the bottom of the rad is bad, so I've ordered a new one from Toyota which I will replace this weekend. Failing that, I guess both the relays or associated fuses could be faulty but I'm hoping its just the sensor. In any event, where are the CDS and RDI fuses located?

Thanks again.






This post has been edited by Racer_J: Jun 13, 2007 - 11:00 AM