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871-2. Hybrid system
1
For safety and security
IS300h_EE(OM53B95E)
CAUTION
Road accident cautions
Observe the following precautions to reduce the risk of death or serious injury:
Pull your vehicle off the road, apply the parking brake, shift the shift lever to
P, and turn the hybrid system off.
Do not touch the high voltage parts, cables and connectors.
If electric wires are exposed inside or outside your vehicle, an electric shock
may occur. Never touch exposed electric wires.
If a fluid leak occurs, do not touch the fluid as it may be strong alkaline elec-
trolyte from the hybrid battery (traction battery). If it comes into contact with
your skin or eyes, wash it off immediately with a large amount of water or, if
possible, boric acid solution. Seek immediate medical attention.
If a fire occurs in the hybrid vehicle, leave the vehicle as soon as possible.
Never use a fire extinguisher that is not meant for electric fires. Using even a
small amount of water may be dangerous.
If your vehicle needs to be towed, do so with rear wheels raised. If the wheels
connected to the electric motor (traction motor) are on the ground when tow-
ing, the motor may continue to generate electricity. This may cause an elec-
tricity leakage leading to a fire. (P. 500)
Carefully inspect the ground under the vehicle. If you find that liquid has
leaked onto the ground, the fuel system may have been damaged. Leave the
vehicle as soon as possible.
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951-3. Theft deterrent system
1
For safety and security
IS300h_EE(OM53B95E)
Vehicles employing this system
have labels on the window glass of
both front doors.
Turn the power switch off, have all the passengers exit the vehicle and
ensure that all the doors are closed.
Using the entry function:
Touch the sensor area on the outside door handle twice within 5 seconds.
Using the wireless remote control:
Press twice within 5 seconds.
Using the entry function: Hold the outside door handle.
Using the wireless remote control: Press .
Double locking system
Unauthorized access to the vehicle is prevented by disabling the door
unlocking function from both the interior and exterior of the vehicle.
Setting the double locking system
Canceling the double locking system
CAUTION
Double locking system precaution
Never activate the double locking system when there are people in the vehicle
because all the doors cannot be opened from inside the vehicle.
Page 97 of 628
961-3. Theft deterrent system
IS300h_EE(OM53B95E)
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 or trunk is unlocked or opened in any way other than
using the entry function or wireless remote control. (The door will lock
again automatically.)
The hood is opened.
The intrusion sensor detects something moving inside the vehicle. (An
intruder gets in the vehicle.) (if equipped)
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 auto-
matically after 30 seconds.
The indicator light changes from
being on to flashing when the system
is set.
Alarm
: If equipped
The alarm
Setting the alarm system
Page 98 of 628
971-3. Theft deterrent system
1
For safety and security
IS300h_EE(OM53B95E)
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.
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 101 of 628

1001-3. Theft deterrent system
IS300h_EE(OM53B95E)
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 can-
celed.
After the intrusion sensor and tilt sensor are canceled, pressing the power
switch or unlocking the doors using the entry function or wireless remote con-
trol 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 on 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 fol-
lowing:
• 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 accesso-
ries or clothes hanging on the coat hooks,
are in the vehicle.
Page 132 of 628
130
IS300h_EE(OM53B95E)3-1. Key information
The following keys are provided with the vehicle.
Electronic keys
• Operating the smart entry & start
system (P. 149)
• Operating the wireless remote
control function
Mechanical keys
Key number plate
Card key (electronic key) (if
equipped)
Operating the smart entry & start
system (P. 149)
Locks the doors (P. 136)
Closes the windows and moon
roof
* (P. 136)
Unlocks the doors (P. 136)
Opens the windows and moon
roof
* (P. 136)
Opens the trunk (P. 144)
*: These settings must be customized at any authorized Lexus dealer or repairer,
or another duly qualified and equipped professional.
Keys
The keys
1
2
3
4
Wireless remote control
1
2
3
4
5
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1333-1. Key information
3
Operation of each component
IS300h_EE(OM53B95E)
When riding in an aircraft
When bringing an electronic key onto an aircraft, make sure you do not press any
buttons on the electronic key while inside the aircraft cabin. If you are carrying
an electronic key in your bag etc., ensure that the buttons are not likely to be
pressed accidentally. Pressing a button may cause the electronic key to emit radio
waves that could interfere with the operation of the aircraft.
Electronic key battery depletion
The standard battery life is 1 to 2 years. (The card key battery life is about a
year and a half.)
If the battery becomes low, an alarm will sound in the cabin when the hybrid
system is stopped. (P. 527)
As the electronic key always receives radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indi-
cate that the electronic key battery may be depleted. Replace the battery when
necessary. (P. 472)
• The smart entry & start system or the wireless remote control does not oper-
ate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
To avoid serious deterioration, do not leave the electronic key within 1 m (3 ft.)
of the following electrical appliances that produce a magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Recharging cellular phones or cordless phones
• Table lamps
• Induction cookers
Replacing the battery
P. 472
Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask any
authorized Lexus dealer or repairer, or another duly qualified and equipped pro-
fessional for details.
If a wrong key is used
The key cylinder rotates freely to isolate inside mechanism.
Page 138 of 628
136
IS300h_EE(OM53B95E)3-2. Opening, closing and locking the doors and trunk
The vehicle can be locked and unlocked using the entry function, wireless
remote control or door lock switches.
Entry function (if equipped)
Carry the electronic key to enable this function.
Grip the handle to unlock the
doors.
Make sure to touch the sensor on
the back of the handle.
The doors cannot be unlocked for
3 seconds after the doors are
locked.
Touch the lock sensor (inden-
tation on the upper part of the
door handle) to lock the doors.
Wireless remote control
Locks all the doors
Press and hold to close the win-
dows and moon roof.
*
Unlocks all the doors
Press and hold to open the win-
dows and moon roof.
*
*
: These settings must be custom-
ized at any authorized Lexus
dealer or repairer, or another duly
qualified and equipped profes-
sional.
Doors
Unlocking and locking the doors from the outside
1
2
1
2