2G Radiator Fan Not Turning On

[JackStieben]

My 2g GST has been overheating recently and I have diagnosed it to be that the fans are not turning on.
The fans motors work because if I turn on the a/c, they both turn on and run for about 15 seconds. After that they turn off for a bit and just continue this cycle.
The things I've checked/replaced would be:

• coolant temp sensors (both of them)
• relays
• radiator fan fuse
• thermostat

The wiring for everything seems to look okay as well. At this point, I am stuck. Could it just be the fans themselves are bad?
I am tuned on a blackbox ecu by my local shop.

 

[BostonGST]

do you have the tactrix cable? You can turn on the fan from evoscan. And you checked the thermostat? Let the car run with the radiator cap off, when the thermostat opens coolant level will drop and that's when fan should kick on, if it doesn't then it's either your ECU or temp sensor.

 

[my dreamt dsm]

I am having the exact same issue. New coolant temp sensor, new thermostat all mitsu products.
Now, I use a paper clip or hair pin, stick it into the coolant sensor female side. It should turn on the fan I guess but mine didn't, I just hear a click. Sounds like it could be a relay.

Any suggestions?

 

[JackStieben]

I've got the tactrix stuff, just no laptop that will support the software. My shop supposedly locks their tunes so no one can mess with them. My thermostat is brand new and works like a charm. In the end, I just rewired the fan to a toggle switch inside the car so I can control it manually. Might not be the most orthodox way of doing it, but I've had zero heating issues since.

 

[smills1840]

As far as I know, there isn't a way to lock the blackbox ecu tune. I could be wrong though.

Also, why wont your laptop run the software? It isn't a very resource hungry software.

 

[JackStieben]

I have a regular desktop PC and then a Google Chromebook. When I do eventually get dsmlink, I plan on using my friends laptop to tune. But maybe I can borrow someones and check the tune. Just to check.

 

[BostonGST]

you don't have to mess with the tune, just load evoscan and run the actuators and select the fan. It will run the fans, if it works then you know it's not the ecu. Also I had this similar problem and a member suggested unplugging the temp sensor (2 wired sensor not the 1 wire one) and the fans should immediately kick on