Hi People

My Crappy ST184 celica is idling high around 1700rpm. So I removed the idle control coil and manually operated the vale, it works fine i can get it to idle normal, put the coil back on the idle rises a little then plug it in and up to 1700 it goes. So i noticed it is a push/pull coil using one power and swapping between the earths for idle and high idle. I checked which earths are giving the signal to find that both are on at once from the computer?? This when the engine is at running temp. I would have thought it would be one or the other.

So i removed the earth from the plug of high idle and now it idling perfect.

Does anyone know if there is something else i should be checking before i try another computer what input does it need for high idle, coolant temp?

I have no error codes and the temp gauge is is reading ok.

Cheers
Alex