Ok....at this point....do as previously noted, go buy a Haynes Repair manual for this car. ECU...Engine Control Module is also called a PCM....PowerTrain Module or the brains of the car. Location is noted in this book.
Wiring diagrams are in the back of it....$$$ well spent.
I stand corrected to my previous post...
So....when the ECU get a signal from the Temp Sensor that the engine is hot or reached a certain temp. It then sends a "ground' signal to the relay #86 to activate the coil....creating a magnetic field attracting the armature. The armature holds the contacts.
JzJzz ....and the man from Down Under....Cheers Mate