Sounding Alarm
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.
When you push the PANIC button for about 2-3 seconds, an alarm sounds to deter any person trying to break into or damage your vehicle. The alarm can be set not to sound. If you want to stop the alarm, push any button. This function does not work when the ignition key is in the ON position.