x5kid

How do you wire up your iac was it through a gpio? and how did you come about on the setup Finally got my car up and running only to find out my car was idling at 3k rpm because my iac was not wired in and setup. Any help would be much appreciated once again. My tuner is asking me to finish this last little hickup before taking it in, I need to know the frequency in hz in order to get the idle motor tuned in. But must configure it in the software as the iac pin and then adjust the pulse width if im not mistaking?