Lexus GS430 User Manual page 46

G11056
"Key reminder alarm
If you lock your electronic key in the trunk when all doors
are locked, an alarm sounds for about 2 seconds to
remind you that the electronic key is in the trunk.
At this time, the trunk lid is unlocked. Even after the alarm
stops sounding, pushing the trunk button will unlock the trunk
lid.
INFORMATION
D If you close the trunk lid while an electronic key is left
in the trunk and all doors are locked, an alarm should
be activated. However, if the electronic key is placed
near the spare tire or at the edge of the trunk, or if the
electronic key is in a metallic bag, the trunk lid might
not be unlocked.
D If you accidentally lock an electronic key in the trunk
when all doors are locked, be aware that anyone can
unlock the trunk by pushing the trunk button.
D Even when the electronic key is outside the trunk, an
alarm still might be activated if the electronic key is
near the trunk. However, if you have the electronic
key, there is no problem.
KEYS AND DOORS
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