2006 Lexus GS 300 Owners Manual - Page 668

KEYS AND DOORS G11030 G11031 "Engine switch on/off reminder alarm If you push the lock button on the outside door handle without turning off the engine switch, an alarm sounds for 2 seconds and the doors will not lock. Before you push the lock button, make sure you have an electronic key and that the engine switch is off. "Open door warning If you push the lock button on the outside door handle while any door is not completely closed, an alarm sounds for 10 seconds and the doors will not lock. To stop the alarm, close all the doors securely or push the "UNLOCK" button on the electronic key. Before you push the lock button, make sure you have an electronic key and all the doors are securely closed. 22