Page 66 of 282

00 SIENNA(U)
60
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.
When a passenger ’s shoulder belt is com-
pletely extended and is then retracted
even slightly, the belt is locked in that
position and cannot be extended. This fea-
ture is used to hold the child restraint
system securely. (For details, see “Child
restraint” in this section.) To free the belt
again, fully retract the belt and then pull
the belt out once more.
CAUTION
After inserting the tab, make sure
the tab and buckle are locked and
that the belt 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.
Seat belts with an adjustable shoulder
anchor—
Adjust the shoulder anchor position to
your size.
To raise: Slide the anchor up.
To lower: Push in the lock release button
and slide the anchor down.
After adjustment make sure the anchor is
locked in position.
CAUTION
Always make sure the shoulder belt
is positioned across the center of
your shoulder. The belt should be
kept away from your neck, but not
falling off your shoulder. Failure to
do so could reduce the amount of
protection in an accident and cause
serious injuries in a collision.
ProCarManuals.com
Page 70 of 282

00 SIENNA(U)
64
—Rear center seat belt
Lengthen
Sit up straight and well back in the
seat. To fasten your belt, insert the tab
into the buckle.
You will hear a click when the tab locks
into the buckle.
If the belt is not long enough for you, hold
the tab at a right angle to the belt and
pull on the tab.
CAUTION
After inserting the tab, make sure
the tab and buckle are locked and
that the belt 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.
Keep as low on hips as possibleAdjust to a
snug fitTo o h i g h
Remove excess length of the belt and
adjust the belt position.
To shorten the belt, pull the free end of
the belt.
Position the lap belt as low as possible
on your hips—not on your waist, then ad-
just it to a snug fit.
CAUTION
High−positioned and loose−fitting lap
belts could cause serious injuries due
to sliding under the lap belt during a
collision or other unintended result.
Keep the lap belt positioned as low
on hips as possible.
ProCarManuals.com
Page 72 of 282

00 SIENNA(U)
66
To connect the extender to the seat
belt, insert the tab into the seat belt
buckle so that the “PRESS” signs on
the buckle−release 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.
—Front seat belt pretensioners
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
belt is quickly drawn back in by the re-
tractor so that the belt snugly restrains
the front seat occupants.
The seat belt pretensioners are activated
even with no passenger in the front seat.
ProCarManuals.com
Page 73 of 282

00 SIENNA(U)
67
This indicator comes on when the igni-
tion key is turned to the “ACC” or
“ON” position. It goes off after about
6 seconds. This means the front seat
belt pretensioners are operating proper-
ly.
This warning light system monitors the
airbag sensor assembly, front airbag sen-
sors, seat belt pretensioner assemblies,
warning light, interconnecting wiring and
power sources. (For details, see “Service
remainder indicators and warning buzzers”
in Section 1−5.)The seat belt pretensioner system mainly
consists of the following components and
their locations are shown in the illustra-
tion.
1. Front airbag sensors
2. SRS warning light
3. Seat belt pretensioner assemblies
4. Airbag sensor assembly
The seat belt pretensioner is controlled by
the airbag sensor assembly. The airbag
sensor assembly consists of a safing sen-
sor and airbag sensor.When a seat belt pretensioner is acti-
vated, an operating noise may be heard
and a small amount of smoke−like gas
may be released. This gas is harmless
and does not indicate that a fire is occur-
ring.
Once the seat belt pretensioner has been
activated, the seat belt retractor remains
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 any of
these may cause sudden operation of
the front seat belt pretensioners or
disable the system, which could re-
sult in death or serious personal inju-
ry.
Failure to follow these instructions
can result in death or serious inju-
ries.
ProCarManuals.com
Page 84 of 282
00 SIENNA(U)
78
CRS installation kit
(Part No. 04731−22012)—contains 1
bolt, 3 types of spacers and 1 locking
clip.
Bolt (Part No. 91511−60830)
ProCarManuals.com
Page 85 of 282
00 SIENNA(U)
79
The built−in child restraint system mainly
consists of two child seats integrated in
the bench type second seat with 5−point
seat belts. Refer to the illustration to be-
come familiar with the parts of the sys-
tem. This child restraint system conforms
to U.S. Federal Motor Vehicle Safety Stan-
dard No.213 and Canada Motor Vehicle
Safety Standard No.213.4.
1. Head restraint
2. Head restraint lock release button
3. Shoulder belts
4. Maximum shoulder height indicator
label
5. Removable pad
6. Seat belt buckle
7. Child seat cushion
8. Seat belt buckle release button
9. Seat belt tabs
10. Owner ’s manual supplement
11. Seat belt adjustment lever
12. Shoulder belt clip
—Built−in child restraint (bench type second seat)
ProCarManuals.com
Page 89 of 282

00 SIENNA(U)
83
7. Sit the child on the child seat. Place
a shoulder belt over each shoulder.
Insert the tabs into the buckle.
CAUTION
When the built−in child restraint is
in use, do not use the adult lap and
shoulder belt instead of the built−in
child restraint seat belt as it can
cause severe injury to the child in
a sudden stop or crash.
After inserting the tabs, make sure
the tabs and buckle are locked and
that the shoulder belts and buckle
strap are not twisted.
Do not insert coins, clips, etc. in
the buckle as this may prevent you
from properly latching the tabs and
buckle.
If the seat belt does not function
normally, it cannot protect your
child from injury. Contact your
Toyota dealer immediately. Do not
use the built−in child restraint until
the seat belt is fixed.
8. Fasten the shoulder belt clip.
The purpose of the clip is to keep the
shoulder belts positioned correctly on the
shoulders.
CAUTION
An unfastened shoulder belt clip will
not keep the belts on the child’s
shoulders. In a sudden stop or crash,
the child may go too far forward and
be seriously injured. Make sure the
belt clip is fastened at all times.
ProCarManuals.com
Page 92 of 282
00 SIENNA(U)
86
(A) INFANT SEAT INSTALLATION
An infant seat is used in rear−facing
position only.CAUTION
Do not put a rear−facing child re-
straint system on the third seat if it
interferes with the lock mechanism of
the second seats. This can cause se-
vere injury to the child and front pas-
senger in case of sudden braking or
a collision.
1. Run the center lap belt through or
around the infant seat following the in-
structions provided by its manufacturer
and insert the tab into the buckle tak-
ing care not to twist the belt.
—Installation with 2−point
type seat belt
ProCarManuals.com