2004 TOYOTA SIENNA Owners Manual

04 SIENNA_U (L/O 0408)
99
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
CENTER SEAT BELT OF THE THIRD
SEATS
The center seat belt of the third seats is
a 3−point type restraint with 2 buckles.
Both seat belt buckles must be correctly
located and securely latched for proper
operation.
Make sure the buckle 1 is securely
latched for ready use of the center seat
belt of the third seats.Two buckles and tabs for center seat
belt of the third seats
The 2 tabs have different shape for its
end so that the belt is not buckled in the
wrong place.
Buckle 1—Properly matches with hooked
end tab
Buckle 2—Properly matches with round
end tab
CAUTION
Make sure the both buckles are cor-
rectly located and securely latched.
Failure to properly match the buckle
and tab may cause serious injury in
case of an accident or a co llision.

04 SIENNA_U (L/O 0408)
100
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
To release the concave end tab, insert the
key into the hole on buckle 1 and allow
the belt to retract.CAUTION
Do not use the center seat belt of the
third seats with either buckle re-
leased. Fastening only the shoulder
belt or lap belt may cause serious
personal injury in case of a sudden
braking or a collision.
Second (7passenger models)
Third
—Stowing seat belt buckles of
the second and third seats

04 SIENNA_U (L/O 0408)
101
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
The seat belt buckles of the second
seats (7passenger models) and third
seats can be stowed when not in use.
Seat belt buckles must be stowed before
you fold the seat back. (See “—Tumbling
second seats (outer seats)” on page 66,
“—Removing second seats (outer seats)”
on page 73 and “—Stowing third seats” on
page 88 in this Section.)
STOWING THE CENTER SEAT BELT OF
THE THIRD SEATS
To stow the center seat belt of the third
seats, pull the seat belt out of its cov-
er. It will automatically roll back part-
way. Roll the seat belt backward and
insert it into the slot of its cover as
shown above. Make sure the tabs are
securely locked in the cover.
Seat belt must be stowed before you fold
the seatback. (See “—Stowing third seats”
on page 88 in this Section.)
NOTICE
Stow the center seat belt of the third
seats except when you are wearing it.
PULLING OUT THE CENTER SEAT BELT
OF THE THIRD SEATS
To use the center seat belt of the third
seats, pull the tab (1) out, then pull the
belt out a little and pull the tab (2) out
from the cover.
If the seat belt cannot be pulled out of the
retractor, firmly pull the belt and release
it. You will then be able to smoothly pull
the belt out of the retractor.
—Stowing the center seat belt
of the third seats

04 SIENNA_U (L/O 0408)
102
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
If your seat belts cannot be fastened se-
curely because they are not long enough,
a personalized seat belt extender is avail-
able from your Toyota dealer free of
charge.
Please contact your local Toyota dealer so
that the dealer can order the proper re-
quired length for the extender. Bring the
heaviest coat you expect to wear for prop-
er measurement and selection of length.
Additional ordering information is available
at your Toyota dealer.
CAUTION
When using the seat belt extender,
observe the following precautions.
Failure to follow these instructions
could reduce the effectiveness of the
seat belt restraint system in case of
vehicle accident, increasing the
chance of personal injury.
Remember that the extender pro-
vided for you may not be safe when
used on a different vehicle, for
another person, or at a different
seating position than the one origi-
nally intended.
If the seat belt extender has been
connected to the driver ’s seat belt
buckle without wearing the seat belt
when using the extender in the
driver ’s seat, the SRS driver ’s air-
bag system will judge that the driv-
er wears the seat belt even if not
wearing it. In this case, the driver ’s
airbag may not activate correctly,
causing death or serious injury in
the event of collision. Be sure to
wear the seat belt with the seat belt
extender.
Be sure to wear the seat belt with-
out the seat belt extender if you
can fasten the seat belt without the
extender.
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.
—Seat belt extender

04 SIENNA_U (L/O 0408)
103
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
To connect the extender to the seat
belt, insert the tab into the seat belt
buckle so that the “PRESS” signs on
the bucklerelease buttons of the ex-
tender and the seat belt are both facing
outward as shown.
You will hear a click when the tab locks
into the buckle.
When releasing the seat belt, press on
the buckle−release button on the extender,
not on the seat belt. This helps prevent
damage to the vehicle interior and extend-
er itself.
When not in use, remove the extender
and store in the vehicle for future use.
CAUTION
After inserting the tab, make sure
the tab and buckle are locked and
that the seat belt extender is 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, immediately contact your
Toyota dealer. Do not use the seat
until the seat belt is fixed. It cannot
protect an adult occupant or your
child from injury.
The shoulder belt comfort guide for the
outside third seats will provide added
seat belt comfort for children who have
outgrown child restraints and for small
adults. When the shoulder belt is in-
serted through the guide, the comfort
guide pulls the belt away from the neck
and head of an occupant.
For wearing the seat belt, see “—Front
and rear seat belts” on page 96 in this
Section. Make sure the shoulder belt
crosses the shoulder.
—Seat belt comfort guides

04 SIENNA_U (L/O 0408)
104
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
CAUTION
Make sure the belt is not twisted and
that it lies flat.
The driver and front passenger ’s seat
belt pretensioners are designed to be
activated in response to a severe fron-
tal impact.
When the airbag sensor detects the shock
of a severe frontal impact, the front seat
belts are quickly drawn back in by the
retractors so that the belts snugly restrain
the front seat occupants.
The front seat belt pretensioners are acti-
vated even with no passenger in the front
seat.
The seat belt pretensioners and SRS air-
bags may not operate together in case of
collisions at certain speeds and angles.This indicator comes on when the igni-
tion key is turned to the “ON” position.
It goes off after about 6 seconds. This
means the front seat belt pretensioners
are operating properly.
This warning light system monitors the
airbag sensor assembly, front airbag sen-
sors, side and curtain shield airbag sen-
sors, curtain shield airbag sensors, driv-
er ’s seat position sensor, driver ’s seat belt
buckle switch, front seat belt pretensioner
assemblies, inflators, warning light, inter-
connecting wiring and power sources. (For
details, see “Service reminder indicators
and warning buzzers” on page 167 in Sec-
tion 1−5.)
—Front seat belt
pretensioners

04 SIENNA_U (L/O 0408)
105
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
The front seat belt pretensioner system
mainly consists of the following compo-
nents and their locations are shown in the
illustration.1. Front airbag sensors
2. SRS warning light
3. Front seat belt pretensioner assemblies
4. Airbag sensor assembly
The front seat belt pretensioners are con-
trolled by the airbag sensor assembly. The
airbag sensor assembly consists of a saf-
ing sensor and airbag sensor. When the front seat belt pretensioners are
activated, an operating noise may be
heard and a small amount of smoke
−like
gas may be released. This gas is harm-
less and does not indicate that a fire is
occurring.
Once the front seat belt pretensioners
have been activated, the seat belt retrac-
tors remain locked.
CAUTION
Do not modify, remove, strike or open
the front seat belt pretensioner as-
semblies, airbag sensor or surround-
ing area or wiring. Doing so may
cause sudden operation of the front
seat belt pretensioners or disable the
system, which could result in death
or serious personal injury.
Failure to follow these instructions
can result in death or serious inju-
ries. Consult your Toyota dealer
about any repairs and modifications.
NOTICE
Do not perform any of the following
changes without consulting your
Toyota dealer. Such changes can
interfere with proper operation of the
front seat belt pretensioners in some
cases.
 Installation of electronic devices
such as a mobile twoway radio,
cassette tape player or compact
disc player
 Repairs on or near the front seat
belt pretensioner assemblies
 Modification of the suspension sys-
tem
 Modification of the front end struc-
ture
 Attachment of a grille guard (bull
bar, kangaroo bar, etc.), snowplow,
winches or any other equipment to
the front end
 Repairs made on or near the front
fenders, front end structure or con-
sole

04 SIENNA_U (L/O 0408)
106
2004 SIENNA from Aug. ’04 Prod. (OM45422U)
This front seat belt pretensioner system
has a service reminder indicator to inform
the driver of operating problems. If any of
the following conditions occurs, this
indicates a malfunction of the airbags or
pretensioners. Contact your Toyota dealer
as soon as possible to service the
vehicle.
The light does not come on when the
ignition key is turned to the “ON” posi-
tion, or remains on.
The light comes on or flashes while
driving.
If either front seat belt does not retract
or cannot be pulled out due to a mal-
function or activation of the relevant
front seat belt pretensioner.
If the following cases, contact your Toyota
dealer as soon as possible:
The front of the vehicle (shaded in the
illustration) was involved in an accident
that was not severe enough to cause
the front seat belt pretensioners to op-
erate.
Either front seat belt pretensioner as-
sembly or surrounding area is
scratched, cracked, or otherwise dam-
aged.
The SRS (Supplemental Restraint Sys-
tem) front airbags are designed to pro-
vide further protection for the driver
and front passenger in addition to the
primary safety protection provided by
the seat belts.
In response to a severe frontal impact,
the SRS front airbags work together with
the seat belts to help reduce injury by
inflating. The SRS front airbags help to
reduce injuries mainly to the driver ’s or
front passenger ’s head or chest caused by
directly hitting the steering wheel or dash-
board. The front passenger airbag is acti-
vated when no passenger is in the front
seat.
Be sure to wear your seat belt properly.
SRS driver airbag and front
passenger airbag