Idle Control System: Notes
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
When the engine is cold, the A/C compressor is on, the transmission is in gear, the brake pedal is pressed, or the 12 volt battery is charging, the PCM sends signals to the throttle actuator to maintain the correct idle speed.