light TOYOTA PRIUS 2007 2.G Service Manual

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22p239
The SRS side airbag and curtain shield
airbag system consists mainly of the fol-
lowing components, and their locations are
shown in the illustration.1. SRS warning light
2. “AIRBAG ON” and “AIRBAG OFF” indi- cator lights
3. Curtain shield airbag modules (airbag and inflator)
4. Front passenger occupant classification system (ECU and sensors)
5. Side airbag modules (airbag and inflator)
6. Curtain shield airbag sensors
7. Side and curtain shield airbag sensors 8. Passenger ’s seat belt buckle switch
9. Airbag sensor assembly
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.

80
NOTICE
Do not perform any of the following
changes without consulting your
Toyota 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
22p010a
This indicator comes on when the “IG
ON” mode is enabled. 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 and indicator
light, front passenger occupant classifica-
tion system, “AIRBAG ON” indicator light,
“AIRBAG OFF” indicator light, front pas-
senger ’s seat belt buckle switch, seat belt
pretensioner assemblies, interconnecting
wiring and power sources. (For details,
see “Service reminder indicators and
warning buzzers” on page 125.)
If any of the following conditions occurs,
this indicates a malfunction of the airbags
or seat belt pretensioners. Contact your
Toyota dealer as soon as possible.
The light does not come on when the
“IG
−ON” mode is enabled or remains
on for more than 6 seconds.
The light comes on while driving.
The SRS warning light and “AIRBAG OFF”
indicator light will come on if there is a
malfunction in the front passenger occu-
pant classification system.

82
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The “AIRBAG ON” and “AIRBAG 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 “AIRBAG OFF” indicator light will be
illuminated when the “IG−ON” mode is en-
abled with the condition 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 “AIRBAG OFF” indicator light is
illuminated, one of the following is likely
to have occurred:
A rear passenger lifts the front passen-
ger seat cushion with their 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 “AIRBAG ON” indicator
light is illuminated when an adult is
seated in the front passenger seat. If the
“AIRBAG 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 “AIRBAG 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 “AIRBAG ON” and “AIRBAG OFF”
indicator lights will be illuminated ini-
tially when the “IGON” mode is en-
abled. After about 4 seconds, they will
go off. After that, the front passenger
occupant classification system operates
and judges which indicator light be illu-
minated.

83
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The SRS warning light and “AIRBAG
OFF” indicator light will come on if
there is a malfunction in the front pas-
senger occupant classification system.

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Condition and operation in the front passenger occupant classification system
Condition detected by
the front passenger
occupant classification
system
Indicator/ warning lightDevices
“AIRBAG ON”
and “AIRBAG
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“AIRBAG ON”OffFlashing*4Activated
2. Child*2 or child
restraint system*3“AIRBAG OFF”*5OffFlashing*4Deactivated
Activated
Activated
3. UnoccupiedNot illuminatedOffOffDeactivatedDeactivated
4. There is a malfunction in the system“AIRBAG 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 86 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 86 as for installing the child restraint system proper ly.

85
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 “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 recline the front passenger
seat seatback so that it interferes
with a rear seat as it may cause the
“AIRBAG OFF” indicator light be il-
luminated. 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
passenger seat, the “AIRBAG ON”
indicator light should be illumi-
nated. If the “AIRBAG 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 “AIRBAG OFF”
indicator light still remains illumi-
nated, 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.

86
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
3point type seat belt” on page 89.)
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 Toyota dealer im-
mediately.
The “AIRBAG 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 66 and “Child restraint” described
below. Toyota strongly urges the use of ap-
propriate 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 SAEJ1819.
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 58 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.
Toyota strongly urges use of a
proper child restraint system which
conforms 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 “AIRBAG 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

87
A forwardfacing child restraint sys-
tem should be allowed to be
installed on the front passenger
seat only when it is unavoidable.
Always move the seat as far back
as possible even if the “AIRBAG
OFF” indicator light is illuminated,
because the front passenger airbag
could inflate with considerable
speed and force. Otherwise, the
child may be killed or seriously in-
jured.
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
airbag and curtain shield airbag in-
flate, 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 passen-
ger seat. If installing a child re-
straint 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 se-
cured. If it is not secured properly,
it may cause death or serious inju-
ry to the child in the event of a
sudden stop or accident.
A child restraint system for a small
child or baby must itself be properly
restrained on the seat with the lap por-
tion of the lap/shoulder belt. You must
carefully consult the manufacturer ’s in-
structions which accompany child re-
straint system.
To provide proper restraint, use a child
restraint system following the manufactur-
er ’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 instructions.
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 in-
juring passengers in the event of a sud-
den stop or accident.
—Child restraint system

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(A) INFANT SEAT INSTALLATION
An infant seat must be used in rear
facing position only.
22p018c
CAUTION
Never install a rearfacing child re-
straint system on the front passen-
ger seat even if the “AIRBAG OFF”
indicator light is illuminated. In the
event of an accident, the impact of
the rapid inflation of the front pas-
senger airbag could cause death or
serious injury to the child if the
rearfacing child restraint system is
installed on the front passenger
seat.
22p045e
Do not install a child restraint sys-
tem on the rear seat if it interferes
with the lock mechanism of the
front seats. Otherwise, the child or
front seat occupant(s) may be killed
or seriously injured in case of sud-
den braking or a collision.
If the driver ’s seat position does
not allow sufficient space for safe
installation, install the child re-
straint system on the rear right
seat.
—Installation with 3point
type seat belt

90
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1. Run the lap and shoulder belt throughor around the infant seat following the
instructions provided by its manufactur-
er 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 you
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 Toyota dealer immedi-
ately. Do not install the child re-
straint system on the seat until the
seat belt is fixed.
22p038c
2. Fully extend the shoulder belt to put itin 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.