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1
Before driving
RX350/270_EE
1-6. Theft deterrent system
Engine immobilizer system
The vehicle's keys have built-in transponder chips that prevent the engine
from starting if the key has not been previously registered in the vehicle's
on-board computer.
Never leave the keys inside the vehicle when you leave the vehicle.
This system is designed to help prevent vehicle theft but does not guaran-
tee absolute security against all vehicle thefts.
Vehicles with a navigation system
The indicator light flashes after
the “ENGINE START STOP”
switch has been turned off to
indicate that the system is oper-
ating.
The indicator light stops flashing
after the “ENGINE START
STOP” switch has been turned
to ACCESSORY or IGNITION
ON mode to indicate that the
system has been canceled.
Vehicles without a navigation system
The indicator light flashes after
the “ENGINE START STOP”
switch has been turned off to
indicate that the system is oper-
ating.
The indicator light stops flashing
after the “ENGINE START
STOP” switch has been turned
to ACCESSORY or IGNITION
ON mode to indicate that the
system has been canceled.
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1-6. Theft deterrent system
RX350/270_EE
■System maintenance
The vehicle has a maintenance-free type engine immobilizer system.
■Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic object
●If the key is in close proximity to or touching a key to the security system (key
with a built-in transponder chip) of another vehicle
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1-6. Theft deterrent system
1
Before driving
RX350/270_EE
Intrusion sensor and tilt sensor
●The intrusion sensor detects an intruder or movement in the vehicle.
●The tilt sensor detects changes in vehicle inclination, such as when the
vehicle is towed away.
This system is designed to deter and prevent vehicle theft but does not
guarantee absolute security against all intrusions.
The intrusion sensor and tilt sensor can be canceled using the cancel
switch.
Vehicles without a navigation system
Close the doors 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
system is set.
■Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarms:
●Unlock the doors using the entry function or the wireless remote
control.
●Start the engine. (The alarm will be deactivated or stopped after a
few seconds.)
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1-7. Safety information
RX350/270_EE
CAUTION
■SRS airbag precautions
●The SRS front passenger airbag also deploys with considerable force, and can
cause death or serious injury especially if the front passenger is very close to the
airbag. The front passenger seat should be as far from the airbag as possible with
the seatback adjusted, so the front passenger sits upright.
●Improperly seated and/or restrained infants and children can be killed or seri-
ously injured by a deploying airbag. An infant or child who is too small to use a
seat belt should be properly secured using a child restraint system. Lexus strongly
recommends that all infants and children be placed in the rear seats of the vehicle
and properly restrained. The rear seats are safer for infants and children than the
front passenger seat. (→P. 1 4 2 )
●Do not sit on the edge of the seat or lean
against the dashboard.
●Do not allow a child to stand in front of the
SRS front passenger airbag unit or sit on
the knees of a front passenger.
●Do not allow the front seat occupants to
hold items on their knees.
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1-7. Safety information
RX350/270_EE
Child restraint systems
Points to remember
Studies have shown that installing a child restraint on a rear seat is much
safer than installing one to the front passenger seat.
●Choose a child restraint system that suits your vehicle and is appropri-
ate to the age and size of the child.
●For installation details, follow the instructions provided with the child
restraint system.
General installation instructions are provided in this manual. (→P. 1 5 2 )
●If child restraint system regulations exist in the country where you
reside, please contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional for the child restraint
system installation.
●Lexus recommends that you use a child restraint system which con-
forms to the regulation ECE No.44.
Types of child restraints
Child restraint systems are classified into the following 5 groups accord-
ing to the regulation ECE No.44.
Group 0: Up to 10 kg (22 lb.) (0 - 9 months)
Group 0
+: Up to 13 kg (28 lb.) (0 - 2 years)
Group I: 9 to 18 kg (20 to 39 lb.) (9 months - 4 years)
Group II: 15 to 25 kg (34 to 55 lb.) (4 years - 7 years)
Group III: 22 to 36 kg (49 to 79 lb.) (6 years - 12 years)
In this owner's manual, the following popular 3 types of child restraint sys-
tems that can be secured with the seat belts are explained:
Lexus strongly urges the use of child restraint systems.
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1-7. Safety information
RX350/270_EE
■When installing the child restraint system on the front passenger seat
■Selecting an appropriate child restraint system
●Use a child restraint system appropriate for the child until the child becomes
large enough to properly wear the vehicle’s seat belt.
●If the child is too large for a child restraint system, sit the child on a rear seat and
use the vehicle's seat belt. (→P. 8 9 )
CAUTION
■Using a child restraint system
The use of a child restraint system not suitable for the vehicle may not properly
secure the infant or child. It may result in death or serious injury (in the event of sud-
den braking or an accident).
■Child restraint precautions
●For effective protection in automobile accidents and sudden stops, a child must
be properly restrained, using a seat belt or child restraint system depending on
the age and size of the child. Holding a child in your arms is not a substitute for a
child restraint system. In an accident, the child can be crushed against the wind-
shield, or between you and the vehicle's interior. This may cause death or serious
injury to the child in the event of a sudden stop or an accident.
●Lexus strongly urges the use of a proper child restraint system that conforms to
the size of the child, installed on the rear seat. According to accident statistics, the
child is safer when properly restrained in the rear seat than in the front seat.
When you have to use a child restraint system
in the front passenger seat, adjust the seat-
back to the most upright position and adjust
the seat to the fully rearward and uppermost
position.
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1-7. Safety information
1
Before driving
RX350/270_EE
CAUTION
■Child restraint precautions
●Never use a rear-facing child restraint system on the front passenger seat when
the airbag manual on-off switch is on. (→P. 1 6 3 )
In the event of an accident, the force of the rapid inflation of the front passenger
airbag can cause death or serious injury to the child.
●A forward-facing child restraint system may be allowed to be installed on the
front passenger seat only when it is unavoidable. A child restraint system that
requires a top tether strap should not be used in the front passenger seat since
there is no top tether strap anchor for the front passenger seat. Adjust the seat-
back as upright as possible and always move the seat as far back as possible
because the front passenger airbag could inflate with considerable speed and
force. Otherwise, the child may be killed or seriously injured.
●Do not allow the child to lean his/her head or any part of his/her body against the
door or the area of the seat, front and rear pillars or roof side rails from which the
SRS side airbags or SRS curtain shield airbags deploy even if the child is seated in
the child restraint system. It is dangerous if the side airbags and curtain shield air-
bags inflate, and the impact could cause death or serious injury to the child.
●Make sure you have complied with all installation instructions provided by the
child restraint manufacturer and that the system is properly secured. If it is not
secured properly, it may cause death or serious injury to the child in the event of a
sudden stop, sudden swerve or an accident.
■When children are in the vehicle
Do not allow children to play with the seat belt. If the seat belt becomes twisted
around a child’s neck, it may lead to choking or other serious injuries that could
result in death.
If this occurs and the buckle cannot be unfastened, scissors should be used to cut
the belt.
■When the child restraint system is not in use
●Keep the child restraint system properly secured on the seat even if it is not in use.
Do not store the child restraint system unsecured in the passenger compartment.
●If it is necessary to detach the child restraint system, remove it from the vehicle or
store it securely in the luggage compartment. This will prevent it from injuring
passengers in the event of a sudden stop, sudden swerve or an accident.
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1-7. Safety information
RX350/270_EE
Installing child restraints
Follow the child restraint system manufacturer's instructions. Firmly
secure child restraints to the seats using a seat belt or ISOFIX rigid
anchors. Attach the top strap when installing a child restraint.
Installation with a seat belt
(→P. 153)
ISOFIX rigid anchors (ISOFIX
child restraint system)
(→P. 157)
Lower anchors are provided for
the outer rear seats. (Buttons
displaying the location of the
anchors are attached to the
seats.)
Anchor brackets
(for the top strap) (→P. 1 5 8 )
An anchor bracket is provided
for each rear seat.
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