Electronic Ignition Switch (EIS) Operating Modes
WARNING: This page is about a different car, the 2008 Dodge Sprinter. However, it is still accessible from the selected car via links, so may be relevant.
The EIS is programmed to adaptively control the on/off state of vehicle electrical systems based on the physical position of the EIS key. There are two main modes of EIS operation, Ignition Switch On, Engine Off, and Engine Start-Up Mode.