TOYOTA xB 2009 (in English) Repair Manual

51
The SRS side airbag and curtain shield
airbag system is controlled by the airbag
sensor assembly. The airbag sensor as-
sembly 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 occu-
pants.
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 imme-
diately. Deployment of the airbags happen in a
fraction of a second, so the airbags must
inflate with considerable force. While the
system is desi
gned to reduce serious inju-
ries, 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 in-
flate, the driver, front passenger and
rear outside passengers must:
Wear their seat belts properly.
Remain properly seated with their
backs upright and against the seats
at all times.
Do not allow anyone to lean against
the door when the vehicle is in use,
since the side airbag and curtain
shield airbag could inflate with con-
siderable speed and force. Other-
wise, he/she may be killed or seri-
ously injured. Special care should
be taken especially when you have
a small child in the vehicle.

52
Sit up straight and well back in the
seat, distributing your weight even-
ly in the seat. Do not apply exces-
sive weight to the outer side of the
seats with a side airbag, and to the
front pillar, rear pillar and roof side
rail with a curtain shield airbag.
Do not allow anyone to get his/her
head closer to the area where the
side airbag and curtain shield air-
bag 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 espe-
cially when you have a small child
in the vehicle.Do not allow anyone to kneel on
the passenger seat, facing the pas-
senger ’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 espe-
cially when you have a small child
in the vehicle.

53
13XB008
Do not allow anyone to get his/her
head or hands out of windows
since the curtain shield airbags
could inflate with considerable
speed and force. Otherwise, he/she
may be killed or seriously injured.
Special care should be taken espe-
cially when you have a small child
in the vehicle.Do not attach a cup holder or any
other device or object on or around
the door. When the side airbag in-
flates, the cup holder or any other
device or object will be thrown with
great force or the side airbag may
not activate correctly, resulting in
death or serious injury. Likewise,
the driver and front passenger
should not hold objects in their
arms or on their knees.Do not attach a microphone or any
other device or object around the
area where the curtain shield airbag
activates such as on the windshield
glass, side door glass, front and
rear pillars, roof side rail and assist
grips. When the curtain shield air-
bag inflates, the microphone or oth-
er device or object will be thrown
away with great force or the curtain
shield airbag may not activate cor-
rectly, resulting in death or serious
injury.

54
Do not hook a hanger, heavy or
sharp pointed objects on the coat
hook. If the curtain shield airbag
inflates, those items will be thrown
away with great force or the curtain
shield airbag may not activate cor-
rectly, resulting in death or serious
injury. When you hang clothes,
hang them on the coat hook direct-
ly.
Do not use seat accessories which
cover the parts where the side air-
bags inflate. Such accessories may
prevent the side airbags from acti-
vating correctly, causing death or
serious injury.
Do not modify or replace the seats
or upholstery of the seats with side
airbags. Such changes may prevent
the side airbag system from activat-
ing correctly, disable the system or
cause the side airbags to inflate ac-
cidentally, resulting in death or seri-
ous injury.
Do not disassemble or repair the
front and rear pillars and roof side
rail containing the curtain shield
airbags. Such changes may disable
the system or cause the curtain
shield airbags to inflate accidental-
ly, resulting in death or serious in-
jury.
Failure to follow these instructions
can result in death or serious injury.
Consult your Scion dealer about any
repair and modification.
If you wish to modify your vehicle for
a person with a physical disability,
consult your Scion dealer. It may dan-
gerously interfere with the SRS side
airbags and curtain shield airbags op-
eration.NOTICE
Do not perform any of the following
changes without consulting your
Scion 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 compact
disc player
 Modification of the suspension sys-
tem
 Modification of the side structure of
the passenger compartment
 Repairs made on or near the con-
sole or front seat

55
13XB010
This indicator comes on when the en-
gine switch is turned to the “ON” posi-
tion. It goes off after about 6 seconds.
This means the SRS side airbags and
curtain shield airbags are operating
properly.The warning light system monitors the air-
bag sensor assembly, front airbag sen-
sors, side and curtain shield airbag sen-
sors, curtain shield airbag sensors,
driver ’s seat position sensor, driver ’s seat
belt buckle switch, front passenger occu-
pant classification system, “AIR BAG ON”
indicator light, “AIR BAG OFF” indicator
light, front passenger ’s seat position sen-
sor, front passenger ’s seat belt buckle
switch, seat belt pretensioner assemblies,
interconnecting wiring and power sources.
(For details, see “Service reminder indica-
tors and warning buzzers” on page 97.)
If any of the following conditions occurs,
this indicates a malfunction of the airbags
or seat belt pretensioners. Contact your
Scion dealer as soon as possible.
The light does not come on when the
engine switch is turned to the “ON”
position or remains on for more than
about 6 seconds.
The light comes on while driving.
The SRS warning light and “AIR BAG
OFF” indicator light will come on if there
is a malfunction in the front passenger
occupant classification system.

56
In the following cases, contact your Scion
dealer as soon as possible:
Any of the SRS side airbags and cur-
tain shield airbags have been inflated.
The portion of the doors (shaded in the
illustration) were involved in an acci-
dent that was not severe enough to
cause the SRS side airbags and cur-
tain shield airbags to inflate.
The surface of the seats with the side
airbag (shaded in the illustration) is
scratched, cracked, or otherwise dam-
aged.
The portion of the front pillars, rear
pillars or roof side rail garnishes (pad-
ding) containing the curtain shield air-
bags inside (shaded in the illustration)
is scratched, cracked, or otherwise
damaged.
NOTICE
Do not disconnect the battery cables
before contacting your Scion dealer.
Your vehicle is equipped with a front
passenger occupant classification sys-
tem. This system detects the conditions
1. through 4. in the table on page 58
and based on these conditions activates
or deactivates the following systems;
Front passenger airbag
Side airbag on the front passenger
seat
Front passenger ’s seat belt pretension-
er
The system monitors the weight and
load on the front passenger seat, and
the seat belt buckle switch to determine
conditions 1. through 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 pas-
senger seat.
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
seatback from the rear passenger seat.
The “AIR BAG ON” and “AIR BAG OFF”
indicator lights indicate the actuation of
the front passenger airbag, side airbag
on the front passenger seat and front
passenger ’s seat belt pretensioner.
The “AIR BAG OFF” indicator light will be
illuminated when the engine switch is
turned to the “ON” position with the condi-
tion 2 in the table shown below.
If the front passenger occupant classifica-
tion system determines that a person of
adult size sits in the front passenger seat
but the “AIR BAG OFF” indicator light is
illuminated, one of the following is likely
to have occurred:
—Front passenger occupant
classification system

57

A rear passenger lifts the front passen-
ger seat cushion with his/her legs.
Objects are placed under the front pas-
senger 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 “AIR BAG ON” indica-
tor light is illuminated when an adult is
seated in the front passenger seat. If the
“AIR BAG OFF” indicator light is illumina-
ted, ask the passenger to sit up straight,
well back in the seat, and with the seat
belt worn correctly. If the “AIR BAG OFF”
indicator light still remains illuminated, ei-
ther ask the passenger to move to the
rear seat, or if that is not possible, move
the front passenger seat fully rearward. The “AIR BAG ON” and “AIR BAG OFF”
indicator lights will be illuminated ini-
tially when the engine switch is turned
to the “ON” position. After about 4 sec-
onds, they will go off. After that, the
front passenger occupant classification
system operates and judges which indi-
cator light be illuminated.
The SRS warning light and “AIR BAG
OFF” indicator light will come on if
there is a malfunction in the front pas-
senger occupant classification system.

58
Condition and operation in the front passenger occupant classification system
Condition detected by
the front passenger
occupant classification system
Indicator/ warning lightDevices
“AIR BAG ON”
and “AIR BAG
OFF” indicator lightsSRS warning
lightFront
passenger’s seat belt
reminder lightFront
passenger airbagSide airbag on
the front
passenger seatCurtain shield
airbag in the front
passenger sideFront
passenger’s seat belt
pretensioner
1. Adult*1“AIR BAG ON”OffFlashing*4Activated
2. Child*2 or child
restraint system*3“AIR BAG OFF”*5OffFlashing*4Deactivated
Activated
Activated
3. UnoccupiedNot illuminatedOffOffDeactivatedDeactivated
4. There is a malfunction in the system“AIR BAG OFF”OnOffDeactivatedActivated
*1: The system judges a person of adult size as an adult. When a smaller adult 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” on page 60 as for installing the child restraint
system.)
*4: When the front passenger does not wear a seat belt.
*5: In case the indicator is not illuminated, see “Child restraint” on page 60 as for installing the child restraint system proper ly.

59
CAUTION
To avoid potential death or serious
injury when the front passenger occu-
pant classification system does not
detect the conditions correctly, ob-
serve the following:
Make sure the “AIR BAG ON” indi-
cator light is illuminated when us-
ing the seat belt extender for the
front passenger seat. If the “AIR
BAG OFF” indicator light is illumi-
nated, disconnect the extender
tongue from the seat belt buckle,
then reconnect the seat belt. Recon-
nect the seat belt extender after
making sure the “AIR BAG ON” in-
dicator light is illuminated. If you
use the seat belt extender while the
“AIR BAG OFF” indicator light is
illuminated, the front passenger air-
bag 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 recline the front passenger
seatback so that it interferes with a
rear seat as it may cause the “AIR
BAG OFF” indicator light be illumi-
nated. If the seatback interferes
with the rear seat, return the seat-
back to a position where it does
not interfere with the rear seat.
Keep the front passenger seatback
as upright as possible when the ve-
hicle is moving. Reclining the seat-
back excessively may lessen the ef-
fectiveness of the seat belt system.
If an adult sits in the front passen-
ger seat, the “AIR BAG ON” indica-
tor light should be illuminated. If
the “AIR BAG OFF” indicator light
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 “AIR
BAG OFF” indicator light still re-
mains illuminated, either ask the
passenger to move to the rear 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 in-
serted into the buckle before some-
one sits in the front passenger
seat.
Do not apply a heavy load to the
front passenger seat.
Do not put weight on the front pas-
senger seat by putting your hands
or feet on the front passenger seat-
back 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.
Child restraint systems installed on
the rear seat should not contact the
front seatbacks.

60
When it is unavoidable to install the
forwardfacing child restraint sys-
tem 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 “—Installation with seat
belt” on page 63.)
Do not remove the front seats.
Do not kick the front passenger
seat or subject it to severe impact.
Otherwise, the SRS warning light
may come on to indicate a malfunc-
tion of the detection system. In this
case, contact your Scion dealer im-
mediately.
The “AIR BAG ON” indicator light may be
illuminated (the front passenger airbag and
side airbag on the front passenger seat
may deploy) even if observing the above
cautions, when a child sits in, or a for-
ward −facing child restraint system is
installed on the front passenger seat. Re-
fer to all the cautions in “SRS airbags” on
page 40 and “Child restraint” described
below. Scion strongly urges the use of ap-
propriate child restraint systems for
children.
The laws of all 50 states in the U.S.A.
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 s
hould sit in the rear
seat and must be restrained using the
vehicle’s seat belt. See “Seat belts” on
page 31 for details.
CAUTION
For effective protection in automo-
bile 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 acci-
dent, the child can be crushed
against the windshield, or between
you and the vehicle’s interior.
Scion strongly urges use of a prop-
er child restraint system which con-
forms to the size of the child,
installed on the rear seat. Accord-
ing to accident statistics, the child
is safer when properly restrained in
the rear seat than in the front seat.
Never install a rearfacing child re-
straint system on the front passen-
ger seat even if the “AIR BAG OFF”
indicator light is illuminated. In the
event of an accident, the force of
the rapid inflation of the front pas-
senger airbag can cause death or
serious injury to the child if the
rearfacing child restraint system is
installed on the front passenger
seat.
Child restraint—
—Child restraint precautions