Auto Lock Function

WARNING: This page is about a different car, the 2002 Lexus GS 430 and 2002 Lexus GS 300. However, it is still accessible from the selected car via links, so may be relevant.

If the door is not actually opened within 30 seconds after the door has been unlocked by pressing the unlock switch on the transmitter, all the doors are automatically locked. If any of the following conditions are detected, the auto lock does not function.

Any door is opened.
The ignition key is inserted into the ignition switch.
When the lock detection switch of all the doors are locked.