2006 LEXUS LX470 light

OCCUPANT RESTRAINT SYSTEMS
150
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 1Curtain shield airbag module (airbag and inflator)
2Side airbag module (airbag and inflator)
3Front passenger occupant classification
indicator light
4 Front passenger occupant classification system
(ECU and sensors)
5 SRS warning light
6Curtain shield airbag sensor assembly
7Side and curtain shield airbag sensor assembly
8Front passenger’s seat belt buckle switch
9Airbag sensor assembly
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 sensors. 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.
In a vehicle rollover, the airbag sensor assembly triggers the
curtain shield airbag inflator. At this time a chemical reaction
in the inflators very quickly fills the airbags with non
−toxic gas
to help restrain the forward or lateral motion of the front and
second seat occupants.
When the airbags inflate, they produce a 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 serious 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.

OCCUPANT RESTRAINT SYSTEMS
152
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Make sure the roll sensing of curtain shield airbags
off indicator is not on. If this indicator light is on, the
curtain shield airbags will not inflate in a vehicle
rollover and you may be killed or seriously injured.
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Do not allow anyone to get his/her head close to the
area where the side airbag and curtain shield airbag
inflate, since these airbags could inflate with
considerable speed and force. Otherwise, he/she
may be killed or seriously injured. Special care
should be taken especially when you have a small
child in the vehicle.
 Do not allow anyone to kneel on the passenger seat,
facing the passenger’s side door, since the side
airbag and curtain shield airbag could inflate with
considerable speed and force. Otherwise, he/she
may be killed or seriously injured. Special care
should be taken especially when you have a small
child in the vehicle.

OCCUPANT RESTRAINT SYSTEMS
155
Failure to follow these instructions can result in death
or serious injury. Consult your Lexus dealer about any
repair and modification.
If you wish to modify your vehicle for a person with a
physical disability, consult your Lexus dealer. It may
dangerously interfere with the SRS side airbags and
curtain shield airbags operation.
NOTICE
Do not perform any of the following changes without
consulting your Lexus dealer. Such changes can
interfere with proper operation of the SRS side airbag
and curtain shield airbag system in some cases.
Installation of electronic devices such as a mobile
twoway radio, cassette tape player or CD player.
 Modification of the side structure of the passenger
compartment.
 Repairs made on or near the console, or front seats.
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This indicator comes on when the ignition switch is turned
to the “ON” position. It goes off after about 6 seconds.
This means the SRS side airbags and curtain shield
airbags are operating properly.
This warning light system monitors the airbag sensor
assembly, front airba g sensors, side and curtain shield airbag
sensor assemblies, curtain shield airbag sensor assemblies,
driver’s seat position sensor, driver’s seat belt buckle switch,
front passenger occupant classification system and indicator
light, front passenger’s seat belt buckle switch, seat belt
pretensioner assemblies, inflators, roll sensing of curtain
shield airbags off indicator light, interconnecting wiring and
power sources. (For details, see “Service reminder indicators
and warning buzzers” on page 52.)

OCCUPANT RESTRAINT SYSTEMS
156If any of the following conditions occurs, this indicates a
malfunction of the airbags or seat belt pretensioners. Contact
your Lexus dealer as soon as possible.

The light does not come on when the ignition key is turned
to the “ON” position or remains on for more than 6 seconds
or flashes.
 The light comes on or starts flashing while driving.
The SRS warning light will come on and front passenger
occupant classification indicator light will indicate “OFF” if
there is a malfunction in the front passenger occupant
classification system.
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OCCUPANT RESTRAINT SYSTEMS
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The front passenger occupant classification indicator
light indicates the actuation of the front passenger airbag,
side airbag on the front passenger seat and front
passenger’s seat belt pretensioner.
The indicator light will indicate “OFF” when the ignition switch
is in the “ON” position with the condition 2 in the table shown
below.
If the front passenger occupant classification system
determines that a person of adult size sits in the front
passenger seat but the “OFF” indicator is illuminated, one of
the following is likely to have occurred:
 A rear passenger lifts the front passenger seat cushion with
their legs.
 Objects are placed under the front passenger seat.
 The front passenger seatback is in contact with the rear
seat. To ensure the system correctly detects an adult sitting in the
front passenger seat, make sure the above do not occur.
Make sure that the “ON” indicator is illuminated when an adult
is seated in the front passenger seat. If the “OFF” indicator is
illuminated, ask the passenger to sit up straight, well back in
the seat, and with the seat belt worn correctly. If the “OFF”
indicator still
remains illuminated, either ask the passenger to
move to the rear seat, or if that is not possible, move the front
passenger seat fully rearward.
The front passenger occupant classification indicator
light will indicate “ON” and “OFF” when the ignition key
is turned to the “ON” position. After about 4 seconds, it
will go off. After about 2 seconds, the front passenger
occupant classification system operates and judges
whether to indicate “ON” or “OFF”.

OCCUPANT RESTRAINT SYSTEMS
159
The SRS warning light will come on and front passenger
occupant classification indicator light will indicate “OFF”
if there is a malfunction in the front passenger occupant
classification system.

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160
Condition and operation in the front passenger occupant classification system
Condition
detected by the
front passenger
occupant
classification
systemIndicator/ warning lightDevices
Front
passenger
occupant
classification
indicator light
SRS warning lightFront
passenger’s
seat belt
reminder lightFront
passenger
airbagSide airbag
on the front
passenger seatCurtain shieldairbag in the
front
passenger
sideFront
passenger’s
seat belt
pretensioner
1. Adult*1“ON”OffFlashing*4Activated
2. Child*2 or
child
restraint
system
*3
“OFF”OffFlashing*4Deactivated
Activated
Activated
3. UnoccupiedNot
illuminatedOffOffDeactivatedDeactivated
4. There is a malfunction
in the system“OFF”OnOffDeactivatedActivated
*1: The system judges a person of adult size as an adult. When a smaller adu\
lt sits in the front passenger seat, the system may
recognize him/her as a child depending on his/her physique and posture.
*2: When a larger child who has outgrown a child restraint system sits in the front\
passenger seat, the system may recognize him/heras an adult depending on his/her physique or posture.
*3: Never install a rear −facing child restraint system on the front passenger seat. A forward −facing child restraint system should only
be installed on the front passenger seat when it is unavoidable. (See “\
Child restraint” on page 162 as for installing the child restraint system.)
*4: When the front passenger does not wear a seat belt.

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161
CAUTION
To avoid potential death or serious injury when the front
passenger occupant classification system does not
detect the conditions correct ly, observe the following:
Make sure the front passenger occupant
classification indicator light indicates “ON” when
using the seat belt extender for the front passenger
seat. If the indicator light indicates “OFF”,
disconnect the extender t ongue from the seat belt
buckle, then reconnect the seat belt. Reconnect the
seat belt extender after making sure the indicator
light indicates “ON”. If you use the seat belt extender
while the indicator light indicates “OFF”, the front
passenger airbag and side airbag on the front
passenger side may not ac tivate correctly, which
could cause death or serious injury in the event of
collision.
Do not recline the front passenger seatback so far
that it touches a rear seat. This may cause the “OFF”
indicator to be illuminated, which indicates that the
passenger’s airbags will not deploy in the event of a
severe accident. If the seat back touches the second
seat, return the seatback to a position where it does
not touches the second seat.
Keep the front passenger seatback as upright as
possible when the vehicle is moving. Reclining the
seatback excessively may lessen the effectiveness of
the seat belt system.
If an adult sits in the front passenger seat, the
occupant classification indicator light should
indicate “ON”. If the “OFF” indicator is illuminated,
ask the passenger to sit up straight, well back in the
seat, feet on the floor, and with the seat belt worn
correctly. If the “OFF” indicator still remains
illuminated, either ask the passenger to move to the
second seat, or if that is not possible, move the front
passenger seat fully rearward.
Wear the seat belt properly.
Make sure the front passenger’s seat belt tab has not
been left inserted into the buckle before someone sits
in the front passenger seat.
Do not apply a heavy load to the front passenger seat
or equipment (e.g. armrest).
Do not put weight on the front passenger seat by
putting your hands or feet on the front passenger
seatback from the second seat.
Do not let a second seat passenger lift the front
passenger seat with their feet or press on the
seatback with their legs.
Do not put objects under the front passenger seat.
 Do not modify or replace the upholstery of the front seat.
Child restraint systems inst alled on the second seat
should not contact the front seatbacks.