I starting to having this problem recently. The cooling fan will come on whenever the key is on the ON position. Even on a stone cold engine. Help me please...

 

there is a diagnostic wire or something that comes off one of your relays that when grounded the fans will always run. just had a look its called the TFA terminal ground it is a GREEN w/ black stripe wire that comes out of both cooling fan relay two and four. in the wiring diagrams its listed as diagnosis connector.

hope this helps,
Brad.

 

you talking about the relay in the engine bay on top of the passenger side fender liner?

 

certainly am, im not sure which ones they are specifically (eg top front or whatever) just disconnect your negative terminal and unplug one relay at a time looking at the wires that come out from underneath each of them.

 

Thanks I will check that tomorrow.

 

also check your sensor on thermostat housing, if it's disconected fan go on.

 

how the connector looks like? what color and how many wire?

 

high water temps will cause the fans to run when the key is on.

 

But OP said it happens even with a stone cold engine.

 

my bad

 

one thing that can be over looked is the ac button can be on.

 

my AC button is not on.

 

then it has to be a bad sensor or relay. I would start be removing one relay at a time to see which is stock open/closed.

 

there is a thermosensor on the back of the thermostat housing i believe

if you still have the stock crossover pipe that runs from the turbos to the IC it is probably below that....it has a green connector and i am willing to bet that is ur problem

ill try to find a pic

 

k look in this area

sorry pic is shitty but i had the exact problem and this lil sensor was the cause


my wiring was bad so inspect it all

 

according to the service manual its the round one with the black red wire

 

thanks for all the information. I will check that tomo.