Lexus GS430 User Manual page 56

KEYS AND DOORS
UNLOCKING THE TRUNK LID
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When you keep the button pushed for about 1 second, you
can unlock the trunk lid.* One beep sounds.
This function does not work in either of the following conditions.
D When the engine switch is selected in "ACC" or "IG−ON"
mode.
D When the trunk opener main switch is deactivated.
NOTE:
*The operation method can be changed.
Ask your Lexus dealer for details.
32
SOUNDING AN ALARM*
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When you push the "PANIC" button for about 1 second, an
alarm sounds to deter any person trying to break into or
damage your vehicle.
If you want to stop the alarm, push any button.
This function does not work when the engine switch is selected
in "IG−ON" mode.
NOTE:
*The alarm can be set not to sound.
Ask your Lexus dealer for details.