I think what your asking is are there two idle air control motors. There is only one. When the ECU sees the AC on it sends out a signal to the idle air control to raise the idle to help with the increased load on the engine when the compressor is running. If you have an erratic idle during the time when the AC is on it maybe due to the IAC needing cleaning. Remove it from the throttle body and clean the carbon off cone end with carburetor cleaner. Also clean the throttle body were the motor goes in to. See if that helps. It doesn’t cost much and can't hurt