belt Lexus GX470 2005 Pictorial Index / LEXUS 2005 GX470 (OM60B11U) Repair Manual

OCCUPANT RESTRAINT SYSTEMS
194
FRONT PASSENGER OCCUPANTCLASSIFICATION SYSTEM
Your vehicle is equipped with a front passenger occupant
classification system. This system detects the conditions
1 Ð 4 in the table shown below, and based on these
conditions activates or deactivates the airbags. The
system monitors the weight and load on the front
passenger seat, and the seat belt buckle switch in
determining conditions 1 Ð 4.
In order for the system to detect the conditions correctly,
do not do any of the following:
 Apply a heavy load to the front passenger seat or equipment
(e.g. armrest).
 Attach a commercial seatback table, etc. to the front
passenger seatback.
 Put weight on the front passenger seat by putting your
hands or feet on the seat seatback from the rear passenger
seat.
The ªAIRBAG OFFº indicator lights will be illuminated
when the ignition switch is in the ªONº position and a child
or child restraint system is in the front passenger seat (see
table±condition 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.

OCCUPANT RESTRAINT SYSTEMS
195
If the front passenger occupant classification system
determines that a person of adult size sits in the front
passenger seat but the ªAIRBAG OFFº 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 ªAIRBAG ONº indicator light is illuminated when
an adult sits in the front passenger seat. If the ªAIRBAG OFFº
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 ªAIRBAG OFFº 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. The ªAIRBAG ONº and ªAIRBAG OFFº indicator light will
be initially illuminated when the ignition switch is turned
to the ªONº 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 ªAIRBAG OFFº indicator light
will be illuminated if there is a malfunction in the front
passenger occupant classification system.

OCCUPANT RESTRAINT SYSTEMS
196
Condition and operation in the front passenger occupant classification s\
ystem
Indicator/warning lightDevices
Condition detectedby the front
passenger occupant
classification systemªAIRBAG ONº and
ªAIRBAG OFFº
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*1ªAIRBAG ONºOffFlashing*4Activated
2Child *2 or child
restraint system*3ªAIRBAG OFFºOffFlashing*4DeactivatedActivated
3UnoccupiedNot
illuminatedOffOffDeactivatedActivatedDeactivated
4There is a
malfunction in the
systemªAIRBAG OFFºOnOffDeactivatedActivated
*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 lar ger child who has outgrown a child restraint system sits in the front pa\
ssenger 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 passe\
nger seat. A forward±facing child restraint system shoul d
only be installed on the front passenger seat when it is unavoidable. (\
See ªChild restraint systemº on page 202 as for install ing
the child restraint system.)
*
4: In the event the front passenger does not wear a seat belt.

OCCUPANT RESTRAINT SYSTEMS
197
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 ªAIRBAG ONº indicator light is
illuminated when using the seat belt extender for the
front passenger seat. If the ªAIRBAG OFFº 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 ªAIRBAG ONº indicator light is illuminated.
If you use the seat belt extender while the ªAIRBAG
OFFº 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
ªAIRBAG OFFº 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.

OCCUPANT RESTRAINT SYSTEMS
198
If an adult sits in the front passenger seat, the
ªAIRBAG ONº indicator light should be illuminated.
If the ªAIRBAG OFFº 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 ªAIRBAG OFFº indicator still remain illuminated,
either ask the passenger to move to the rear seat, or
if that is not possible, move the front passenger seat
fully rearward.
 When it is unavoidable to install the forward±facing
child restraint system on the front passenger seat,
install the child restraint system on the front
passenger seat in the proper order. (As for the
installation order, see ªChild restraint systemº on
page 202.)
 Do not remove the seat.
 Do not kick the front passenger seat or subject it to
severe impact. Otherwise, the SRS warning light may
come on to indicate a malfunction of the detection
system. In this case, contact your Lexus dealer
immediately.
 Child restraint systems installed on the rear seat
should not contact the front seatbacks.In addition to the precautions outlined above, the ªAIRBAG
ONº indicator light may be illuminated when a child sits in the
front passenger seat or a forward±facing child restraint system
is installed on the front passenger seat. If the ªAIRBAG OFFº
indicator light is not illuminated in these circumstances, the
front passenger airbag and side airbag on the front passenger
side are in an activated condition Ð the airbags will deploy if
an impact meets the deployment criteria. Refer to all the
cautions in this Section and ªChild restraint systemº on page
202.

OCCUPANT RESTRAINT SYSTEMS
199
ROLL SENSING OF CURTAIN
SHIELD AIRBAGS OFF SWITCH
The roll sensing of curtain shield airbags off switch
(ªRSCA OFFº switch) can turn off the curtain shield
airbags and seat belt pretensioners in a vehicle rollover.
This switch should only be used if inflation is not desired
(such as extreme off±road driving).
When you push the ªRSCA OFFº switch for a few seconds with
the ignition switch on, the ªRSCA OFFº indicator light comes
on and the roll sensing function is turned off. When you push
the switch again, the indicator light goes off and the roll sensing
function is turned on. (For details about the roll sensing
function, see ªSRS side airbags and curtain shield airbagsº on
page 179.) In a severe side impact, the curtain shield airbags on impacted
side will inflate even if the roll sensing function is turned off.
(For details about the curtain shield airbags, see ªSRS side
airbags and curtain shield airbagsº on page 179.)
In a severe frontal impact, the seat belt pretensioners will work
even if the roll sensing function is turned off. (For details about
the seat belt pretensioners, see ªSeat belt pretensionersº on
page 162.)
If the ignition switch is turned to ªACCº or ªLOCKº with the\
roll
sensing
function off and then the ignition switch is turned back
to ªONº, the roll sensing function will turn back on
automatically.CAUTION
 Before normal driving, make sure the ªRSCA OFFº
indicator light is off.
 When the roll sensing function is turned off (and the
ªRSCA OFFº indicator light is on), the curtain shield
airbags and seat belt pretensioners will not work in
a vehicle rollover. Turning off the curtain shield
airbags and seat belt pretensioners reduces
occupant protection which your vehicle safety
systems can provide in accidents and increase the
likelihood of death or serious injuries.

OCCUPANT RESTRAINT SYSTEMS
200
CHILD RESTRAINT
Child restraint precautions
Lexus strongly urges the use of appropriate child restraint
systems for children.
The laws of all 50 states in the U.S.A. and Canada now require
the use of a child restraint system.
Your vehicle conforms to SAE J1819.
If a child is too large for a child restraint system, the child should
sit in the rear seat and must be restrained using the vehicle's
seat belt. See ªSeat beltsº on page 151 for details.
CAUTION
 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 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
windshield, or between you and the vehicle's interior.
 Lexus strongly urges use of a proper child restraint
system which 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.

OCCUPANT RESTRAINT SYSTEMS
202
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
204INSTALLATION WITH 3±POINT TYPE SEAT BELT
(A) Infant seat installation
An infant seat must be used in rear±facing position only.
CAUTION

Never install a rear±facing child restraint system on
the front passenger seat even if the ªAIRBAG OFFº
indicator light is illuminated. 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 if the rear±facing child restraint system is
installed on the front passenger seat.

OCCUPANT RESTRAINT SYSTEMS
206
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.
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.