2006 Lexus GX470 light

OCCUPANT RESTRAINT SYSTEMS
161

1Curtain shield airbag modules (airbag and inflator)
2Front passenger occupant classification system
(ECU and sensors)
3“AIRBAG ON” and “AIRBAG OFF” indicator lights
4Side airbag modules (airbag and inflator)
5Curtain shield airbag sensor assemblies
6SRS warning light and “RSCA OFF” indicator light
7Side and curtain shield airbag sensor assemblies
8Roll sensing of curtain shield airbags off switch
9Front passenger’s seat belt buckle switch
10Airbag 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 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.

OCCUPANT RESTRAINT SYSTEMS
163
Make sure the “RSCA OFF” indicator light is off. The
curtain shield airbags will not inflate in a vehicle
rollover if this indicator light is on and you may be
killed or seriously injured. For details, see “Roll
sensing of curtain shield airbags off switch” on page
174. Do not allow anyone to get his/her head closer 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
166
Do not place luggage heavier than specified on the
roof luggage carrier. Such luggage may cause the
curtain shield airbags and seat belt pretensioners to
inflate accidentally, which could result in death or
serious injury. For details, see “Roof luggage
carrier” on page 107.
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 suspension system
 Modification of the structure of the passenger
compartment
 Repairs made on or near the console or front seat
The indicator comes on when the ignition key 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 airbag 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, “AIRBAG ON”
indicator light, “AIRBAG OFF” indicator light, front passenger’s
seat belt buckle switch, front seat belt pretensioner
assemblies, inflators, warning light, “RSCA OFF” indicator
light, interconnecting wiring and power sources. (For details,
see “Service reminder indicators and warning buzzers” on
page 51 for instructions.)

OCCUPANT RESTRAINT SYSTEMS
167
If 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 and “AIRBAG OFF” indicator light will
be illuminated if there is a malfunction in the front passenger
occupant classification system.
16PY177

OCCUPANT RESTRAINT SYSTEMS
169
The “AIRBAG OFF” indicator lights will be illuminated
when the ignition switch is in the “ON” position and a child
or child restraint system is in the front passenger seat (see
tablecondition 2). This indicates that in the event of a
severe frontal or passenger’s side impact, the front
passenger airbag and side airbag on the front passenger
seat are deactivated and will not deploy. If the front passenger occupant classification system
determines that a person of adult size sits in the front
passenger seat but the “AIRBAG OFF” indicator light is
illuminated, one of the following is likely to have occurred:

The rear passenger lifts the front passenger seat cushion
with their legs.
 Objects are placed under the front passenger seat.
 A front passenger seat seatback is in contact with a 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 the “AIRBAG ON” indicator light is illuminated when
an adult sits in the front passenger seat. If the “AIRBAG OFF”
indicator light is illuminated, ask the passenger to sit up
straight, well back in the seat, and with the seat belt worn
correctly. If the “AIRBAG OFF” indicator light 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.

OCCUPANT RESTRAINT SYSTEMS
170The “AIRBAG ON” and “AIRBAG OFF” indicator light will
be initially illuminated when the ignition switch is turned
to the “ON” position. It will remain for about four seconds
and then go off. After about two seconds, the front
passenger occupant classification system operates and
judges whether to turn the indicator light on or not.
The SRS warning light and “AIRBAG OFF” indicator light
will be illuminated if there is a malfunction in the front
passenger occupant classification system.

OCCUPANT RESTRAINT SYSTEMS
171
Condition and operation in the front passenger occupant classification s\
ystem
Condition detected by the front
passenger occupant
classification system
Indicator/warning lightDevices
“AIRBAG ON” and
“AIRBAG OFF”
indicator lights
SRS
warning light
Front
passenger’s seat belt
reminder light
Front
passenger airbagSide airbag
on the frontpassenger seatCurtain
shield airbag in the frontpassenger sideFront
passenger’s seat belt
pretensioner
1Adult*1“AIRBAG ON”OffFlashing*4Activated
2Child *2 or child
restraint system*3“AIRBAG OFF”OffFlashing*4Deactivated
Activated
Activated
3UnoccupiedNot
illuminatedOffOffDeactivatedDeactivated
4There is a
malfunction in the
system“AIRBAG OFF”OnOffDeactivatedActivated
*1: The system judges a person of adult size as an adult. When a smaller ad\
ult 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/her as 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 system” on page 176 as for installing
the child restraint system.)
*
4: In the event the front passenger does not wear a seat belt.

OCCUPANT RESTRAINT SYSTEMS
172
CAUTION
To avoid potential death or serious injury when the front
passenger occupant classification system does not
detect the conditions correctly, observe the following.
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.
 Make sure the “AIRBAG ON” indicator light is
illuminated when using the seat belt extender for the
front passenger seat. If the “AIRBAG OFF” indicator
light is illuminated, disconnect the extender tongue
from the seat belt buckle, then reconnect the seat
belt. Reconnect the seat belt extender after making
sure the “AIRBAG ON” indicator light is illuminated.
If you use the seat belt extender while the “AIRBAG
OFF” indicator light is illuminated, the front
passenger airbag and side airbag on the front
passenger side may not activate correctly, which
could cause death or serious injury in the event of
collision.
 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
seat seatback from the rear passenger seat.
 Do not let a rear 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 recline the front passenger seat seatback so
far that it touches a rear seat. This may cause the
“AIRBAG OFF” indicator light to be illuminated,
which indicates that the passenger’s airbags will not
deploy in the event of a severe accident. If the
seatback touches the rear seat, return the seatback
to a position where it does not touch the rear 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.