Interior Courtesy Lamp Description
WARNING: This page is about a different car, the 2006 Suzuki Verona. However, it is still accessible from the selected car via links, so may be relevant.
The courtesy lamp is located on the headliner and has 3 positions. If the switch is in the center position, the lamp will go ON whenever a door is opened and go OFF when it is closed. In the ON position, the lamp will stay on until it is turned OFF. In the OFF position, the lamp will not come on, even when a door is opened.