Page 98 of 1014
97
1 1-3. Theft deterrent system
GS450h_300h_OM_OM30D53E_(EE)
For safety and security
Alarm
The alarm uses light and sound to give an alert when an intrusion is
detected.
The alarm is triggered in the following situations when the alarm is
set:
A locked door is unlocked or opened in any way other than using
the entry function or wireless remote control. (The door will lock
again automatically.)
A trunk is opened in any way other than using the entry function,
wireless remote control or mechanical key.
The hood is opened.
The tilt sensor detects a change of vehicle inclination. (if
equipped)
Close the doors, trunk and hood,
and lock all the doors using the
entry function or wireless remote
control. The system will be set
automatically after 30 seconds.
The indicator light changes from
being on to flashing when the sys-
tem is set.
: If equipped
The alarm
Setting the alarm system
Page 99 of 1014
981-3. Theft deterrent system
GS450h_300h_OM_OM30D53E_(EE)
Do one of the following to deactivate or stop the alarm:
Unlock the doors or open the trunk using the entry function or
wireless remote control.
Turn the power switch to ACCESSORY or ON mode, or start the
hybrid system. (The alarm will be deactivated or stopped after a
few seconds.)
System maintenance
The vehicle has a maintenance-free type alarm system.
Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of
the following:
Nobody is in the vehicle.
The windows and moon roof (if equipped) are closed before the alarm is
set.
No valuables or other personal items are left in the vehicle.
Deactivating or stopping the alarm
Page 100 of 1014
991-3. Theft deterrent system
1
GS450h_300h_OM_OM30D53E_(EE)
For safety and security
Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
Alarm-operated door lock
When the alarm is operating, the doors are locked automatically to prevent
intruders.
Do not leave the key inside the vehicle when the alarm is operating, and
make sure the key is not inside the vehicle when recharging or replacing the
12-volt battery.
Customization
The alarm can be set to deactivate when the mechanical key is used to
unlock.
(Customizable features: P. 942)
The doors are unlocked using the
mechanical key.
A person inside the vehicle opens a
door, the trunk or hood.
The 12-volt battery is recharged or
replaced when the vehicle is locked.
(P. 913)
Page 102 of 1014

1011-3. Theft deterrent system
1
GS450h_300h_OM_OM30D53E_(EE)
For safety and security
Canceling and automatic re-enabling of the intrusion sensor and tilt sensor
The alarm will still be set even when the intrusion sensor and tilt sensor are
canceled.
After the intrusion sensor and tilt sensor are canceled, pressing the power
switch or unlocking the doors using the entry function, wireless remote con-
trol or mechanical key will re-enable the intrusion sensor and tilt sensor.
The intrusion sensor and tilt sensor will automatically be re-enabled when
the alarm system is deactivated.
Intrusion sensor detection considerations
The sensor may trigger the alarm in the following situations:
Places with extreme vibrations or noises, or situations in which the vehicle
is subject to repeated impacts or vibrations:
• When parked in a parking garage
• When the vehicle is transported by a ferry, trailer, train, etc.
• When ice adhering to the vehicle is removed
• When the vehicle is in an automatic or high-pressure car wash
• When in a hail or lightning storm
A window or the moon roof is open.
In this case, the sensor may detect the
following:
• Wind or the movement of objects
such as leaves and insects inside the
vehicle
• Ultrasonic waves emitted from
devices such as the intrusion sensors
of other vehicles
• The movement of people outside the
vehicle
Unstable items, such as dangling acces-
sories or clothes hanging on the coat
hooks, are in the vehicle.
Page 138 of 1014
137
3
Operation of
each component
GS450h_300h_OM_OM30D53E_(EE)3-1. Key information
Keys .................................. 138
3-2. Opening, closing and locking
the doors and trunk
Smart entry & start system 143
Wireless remote control .... 168
Doors ................................ 183
Trunk................................. 187
3-3. Adjusting the seats
Front seats ......................... 194
Driving position memory.. 198
Head restraints .................. 204
3-4. Adjusting the steering wheel
and mirrors
Steering wheel .................. 207
Inside rear view mirror ..... 208
Outside rear view mirrors ..211
3-5. Opening, closing the windows
and moon roof
Power windows................. 215
Moon roof ......................... 218
Page 140 of 1014
1393-1. Key Information
3
Operation of each component
GS450h_300h_OM_OM30D53E_(EE)
To take out the mechanical key,
push the release button and take
the key out.
The mechanical key can only be
inserted in one direction, as the
key only has grooves on one side.
If the key cannot be inserted in a
lock cylinder, turn it over and re-
attempt to insert it.
After using the mechanical key,
store it in the electronic key. Carry
the mechanical key together with
the electronic key. If the electronic
key battery is depleted or the entry
function does not operate properly,
you will need the mechanical key.
(P. 908)
Using the mechanical key
Page 141 of 1014

1403-1. Key Information
GS450h_300h_OM_OM30D53E_(EE)
Card key (if equipped)
The card key is not waterproof.
The mechanical key that is stored inside the card key should be used only if
a problem arises, such as when the card key does not operate properly.
If it is difficult to take out the mechanical key, push down the lock release
button using a pen tip etc. If it is still difficult to pull it out, use a coin etc.
When required to leave the vehicle’s key with a parking attendant
Turn the trunk opener main switch off and lock the glove box as circum-
stances demand. (P. 188, 689)
Remove the mechanical key for your own use and provide the attendant with
the electronic key only.
If you lose your mechanical keys
New genuine mechanical keys can be made by any authorized Lexus dealer
or repairer, or another duly qualified and equipped professional using the
other mechanical key and the key number stamped on your key number plate.
Keep the plate in a safe place such as your wallet, not in the vehicle.
To store the mechanical key in the card
key, insert it while pressing the lock
release button.
If the battery cover is not installed and
the battery falls out or if the battery was
removed because the key got wet, rein-
stall the battery with the positive termi-
nal facing the Lexus emblem.
Page 144 of 1014

143
3 3-2. Opening, closing and locking the doors and trunk
Operation of each component
GS450h_300h_OM_OM30D53E_(EE)
Smart entry & start system
The following operations can be performed simply by carrying the
electronic key (including the card key) on your person, for example
in your pocket. (The driver should always carry the electronic key.)
Operation signals
The emergency flashers flash to indicate that the doors have been locked/
unlocked. (Locked: once; Unlocked: twice)
Security feature
If a door is not opened within approximately 30 seconds after the vehicle is
unlocked, the security feature automatically locks the vehicle again.
Welcome light illumination control
The front position, tail and license plate lights automatically turn on at night
when the doors are unlocked using the entry function or wireless remote con-
trol if the light switch is in the “AUTO” position.
Function summary
Locks and unlocks the doors (vehicles with entry function) (P.
144)
Opens the trunk (vehicles with entry function) (P. 144)
Starts the hybrid system (P. 246)1
2
3