System Outline

1. Dome Light and Ignition Key Illumination Function 

   When any door is opened, the dome light (If SW is set to 'DOOR') and ignition key cylinder light are lit using a fade-in method. Then when all the doors are closed (Any door is unlocked), the illumination is kept ON by a timer for approximately for 15 seconds and is then turned OFF using a fade out method when the timer expires.

2. Battery Saver Function 

If the illumination stays on for more than 20 minutes because a door is open, it is turned OFF automatically.