Lexus GS 350 Owner's Manual page 172

When the vehicle is not driven for extended periods
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To prevent theft of the vehicle, do not leave the electronic key within 2 m (6 ft.) of the
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vehicle.
The smart entry & start system can be deactivated in advance. (P. 634)
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To operate the system properly
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Make sure to carry the electronic key when operating the system. Do not get the elec-
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tronic key too close to the vehicle when operating the system from the outside of the
vehicle.
Depending on the position and holding condition of the electronic key, the key may not
be detected correctly and the system may not operate properly. (The alarm may go off
accidentally, or the door lock prevention function may not operate.)
Do not leave the electronic key inside the trunk.
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The key confinement prevention function may not operate, depending on the location
of the key (close to a spare tire [if equipped], the inside edge of the trunk), conditions
(inside a metal bag, close to metallic objects) and the radio waves in the surrounding
area. (P. 162)
If the smart entry & start system does not operate properly
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Locking and unlocking the doors, opening the trunk: Use the mechanical key.
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(P. 591)
Starting the engine: P. 592
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Customization
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Settings (e. g. smart entry & start system) can be changed.
(Customizable features: P. 627)
If the smart entry & start system has been deactivated in a customized setting
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Locking and unlocking the doors and opening the trunk:
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Use the wireless remote control or mechanical key. (P. 153, 161, 591)
Starting the engine and changing engine switch modes: P. 592
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Stopping the engine: P. 222
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GS350_300_GS F_OM_OM30J17E_(GE)
3-2. Opening, closing and locking the doors and trunk
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