Lexus GS460 Owner's Manual page 88

1-6. Theft deterrent system
System maintenance
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The vehicle has a maintenance-free type alarm system.
Items to check before locking the vehicle
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To prevent unexpected triggering of the alarm and vehicle theft, make sure of the
following:
Nobody is in the vehicle.
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The windows and moon roof are closed before the alarm is set.
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No valuables or other personal items are left in the vehicle.
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Triggering of the alarm
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The alarm may be triggered in the following situations.
(Stopping the alarm deactivates the alarm system.)
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GS_G_U (OM30C11U)
May 21, 2010 1:06 pm
A person inside the vehicle opens a door,
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the trunk or hood.
The 12 volt battery is recharged or
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replaced when the vehicle is locked.