Circuit Description
WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
ECM (PCM) outputs A/C ON signal (one of the signals for A/C control module to control the A/C) to A/C control module when A/C switch signal inputted to ECM (PCM) and engine conditions are specified.