2006 LEXUS RX330 ECU

OCCUPANT RESTRAINT SYSTEMS
186
1Curtain shield airbag modules (airbag and inflater)
2Side airbag modules (airbag and inflator)
3Front passenger occupant classification system
(ECU and sensors)
4“AIRBAG ON” and “AIRBAG OFF” indicator lights
5SRS warning light
6Curtain shield airbag sensor assemblies
7Side and curtain shield airbag sensor assemblies
8Airbag sensor assembly
9Front passenger’s seat belt buckle switch
The SRS side airbag and curtain shield airbag system consists
mainly of the above components, and their locations are shown
in the illustration.
The SRS side airbag and curtain shield airbag system is
controlled by the airbag sensor assembly. The airbag sensor
assembly consists of a safing sensor and airbag sensor.
In a severe side impact, the side and curtain shield airbag
sensor and/or the curtain shield airbag sensor trigger(s) the
side airbag inflators and/or the curtain shield airbag inflators.
At this time a chemical reaction in the inflators quickly fills the
airbags with non −toxic gas to help restrain the lateral motion
of the occupants.
In a vehicle rollover, the airbag sensor assembly triggers the
curtain shield airbag inflator. At this time, a chemical reaction
in the inflators quickly fills the airbags with non −toxic gas to
help restrain the lateral motion of the occupants. When the airbags inflate, they produce a fairly loud noise and
release some smoke and residue along with non
−toxic gas.
This does not indicate a fire. This smoke may remain inside the
vehicle for some time, and may cause some minor irritation to
the eyes, skin or breathing. Be sure to wash off any residue as
soon as possible to prevent any potential skin irritation with
soap and water. If you can safely exit from the vehicle, you
should do so immediately.
Deployment of the airbags happens in a fraction of a second,
so the airbags must inflate with considerable force. While the
system is designed to reduce se rious injuries, it may also
cause minor burns or abrasions and swelling.
Front seats as well as parts of the front and rear pillars, and roof
side rail may be hot for several minutes, but the airbags
themselves will not be hot. The airbags are designed to inflate
only once.
CAUTION
SRS side airbags and curtain shield airbags inflate with
considerable force. To reduce the possibility of death
or serious injury when they inflate, the driver, front
passenger and rear outboard passengers must:
 Wear their seat belts properly.
 Remain properly seated with their backs upright and
against the seats at all times.

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On vehicles with side airbags and curtain shield
airbags, 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 or rear pillar or roof side rail from
which the side airbags or curtain shield airbags
deploy even if the child is seated in the child restraint
system. It is dangerous if the side airbags and/or
curtain shield airbags inflate, and the impact could
cause death or serious injury to the child.
 Do not use the seat belt extender when installing a
child restraint system on the front or rear passenger
seat. If installing a child restraint system with the
seat belt extender connected to the seat belt, the seat
belt will not securely hold the child restraint system,
which could cause death or serious injury to the child
or other passengers in the event of collision.
 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 or accident.Child restraint system
A child restraint system for a small child or baby must
itself be properly restrained on the seat with the lap
portion of the lap/shoulder belt. You must carefully
consult the manufacturer’s instructions which
accompany the child restraint system.
To provide proper restraint, use a child restraint system
following the manufacturer’s instructions about the appropriate
age and size of the child for the child restraint system.
Install the child restraint system correctly following the
instructions provided by its manufacturer. General directions
are also provided under the following illustrations.
The child restraint system should be 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 not using the child restraint system, keep it secured with
the seat belt or place it somewhere other than the passenger
compartment. This will prevent it from injuring passengers in
the event of a sudden stop or accident.

OCCUPANT RESTRAINT SYSTEMS
200Types of child restraint system
Child restraint systems are classified into the following 3
types
depending on the child’s age and size.
(A) Infant seat
(B) Convertible seat
(C) Booster seat
Install the child restraint system following the instructions
provided by its manufacturer.
Your vehicle has anchor brackets for securing the top strap of
a child restraint system.
For instructions about how to use the anchor bracket, see
“Using a top strap” on page 217.
The child restraint lower anchorages approved for your vehicle
may also be used. See “Installation with child restraint lower
anchorages” on page 220 for instructions. (A) Infant seat
(B) Convertible seat

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203
1Same position2Same angle
When installing a child restraint system in the rear
center position, adjust both seat cushions to the
same position and align both seatbacks at the same
angle. Otherwise, the child restraint system cannot
be securely restrained and this may cause death or
serious injuries in a collision.
1. Run the lap and shoulder belt through or around the infant
seat following the instructions provided by its manufacturer
and insert the tab into the buckle taking care not to twist the
belt. Keep the lap portion of the belt tight.

OCCUPANT RESTRAINT SYSTEMS
204
CAUTION
After inserting the tab, make sure the tab and buckle
are locked and that the lap and shoulder portions of
the belt are not twisted.
 Do not insert coins, clips, etc. in the buckle as this
may prevent your child from properly latching the tab
and buckle.
 If the seat belt does not function normally, it cannot
protect your child from death or serious injury.
Contact your Lexus dealer immediately. Do not
install the child restraint system on the seat until the
seat belt is fixed.
2. Fully extend the shoulder belt to put it in the lock mode.
When the belt is then retracted even slightly, it cannot be
extended.
To hold the infant seat securely, make sure the belt is in the lock
mode before letting the belt retract.

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205
3. While pressing the infant seat firmly against the seat
cushion and seatback, let the shoulder belt retract as far as it
will go to hold the infant seat securely.
CAUTION
Push and pull the child restraint system in different
directions to be sure it is secure. Follow all the
installation instructions provided by its manufacturer.

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207
5. Fully extend the shoulder belt to put it in the lock mode.
When the belt is then retracted even slightly, it cannot be
extended. To hold the seat securely, make sure the belt is in
the lock mode before letting the belt retract.
6. While pressing the convertible seat firmly against the seat
cushion and seatback, let the shoulder belt retract as far as it
will go to hold the convertible seat securely.
CAUTION
Push and pull the child restraint system in different
directions to be sure it is secure. Follow all the
installation instructions provided by its manufacturer.
7. Put a child on the child restraint system and secure the child,
complying with the instructions provided by the child restraint
system manufacturer.
The “AIRBAG OFF” indicator light is illuminated when the
ignition
key is “ON” and the child is in the child restraint system
after following these procedures. The “AIRBAG OFF” indicator
light indicates the SRS front passenger airbag and side airbag
on the passenger side will not deploy. If the “AIRBAG ON”
indicator light is illuminated, remove the child restraint system
and reinstall it with the ignition key in the “ACC” or “LOCK”
position. If the indicator light is not illuminated when the ignition
key is turned to the “ON” position, then the SRS front
passenger airbag and side airbag on the passenger side may
deploy in an accident. Do not drive the vehicle in this condition.
Remove the child restraint system and contact your Lexus
dealer.
CAUTION
When it is unavoidable to install the forwardfacing
child restraint system on the front passenger seat,
install the child restraint system on the front passenger
seat in the proper order. Otherwise, the front passenger
occupant classification system can not detect the
presence of the child restraint system and the front
passenger airbag and side airbag on the front
passenger seat could deploy.

OCCUPANT RESTRAINT SYSTEMS
210
1Same position2Same angle
When installing a child restraint system in the rear
center position, adjust both seat cushions to the
same position and align both seatbacks at the same
angle. Otherwise, the child restraint system cannot
be securely restrained and this may cause death or
serious injuries in a collision.
1. Run the lap and shoulder belt through or around the
convertible seat following the instructions provided by its
manufacturer and insert the tab into the buckle taking care not
to twist the belt. Keep the lap portion of the belt tight.