Lexus ES-300 2001 Manual page 97

INTERIOR EQUIPMENT
For easy access to the ignition switch, the ignition
switch light comes on when any of the doors are
opened.
The light remains on for about 15 seconds and goes out
after all the doors are closed. However, the light goes
out immediately when all the doors are locked or the
ignition key is in the "ACC" or "ON" position.
80