Pcm Operating Modes: Notes
WARNING: This page is about a different car, the 2011 Jeep Patriot and 2011 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.
As input signals to the PCM change, the PCM adjusts its response to the output devices. For example, the PCM must calculate a different fuel quantity and fuel timing for engine idle condition than it would for a wide open throttle condition. There are several different modes of operation that determine how the PCM responds to the various input signals.