2021 TOYOTA SIENNA HYBRID headlights

2764-5. Using the driving support systems
WARNING
●Vehicle is driven in a construc-
tion zone.
●A spare tire, tire chains, etc. are
equipped.
●When the tires have been
excessively worn, or when the
tire inflation pressure is low.
●When your vehicle is towing a
trailer or during emergency tow-
ing
■Preventing LTA system mal-
functions and operations per-
formed by mistake
●Do not modify the headlights or
place stickers, etc. on the sur-
face of the lights.
●Do not modify the suspension
etc. If the suspension etc. needs
to be replaced, contact your
Toyota dealer.
●Do not install or place anything
on the hood or grille. Also, do
not install a grille guard (bull
bars, kangaroo bar, etc.).
●If your windshield needs
repairs, contact your Toyota
dealer.
■Conditions in which functions
may not operate properly
In the following situations, the
functions may not operate prop-
erly and the vehicle may depart
from its lane. Drive safely by
always paying careful attention to
your surroundings and operate
the steering wheel to correct the
path of the vehicle without relying
solely on the functions.
●When the follow-up cruising dis-
play is displayed ( P.281) and
the preceding vehicle changes
lanes. (Your veh icle may follow
the preceding vehicle and also
change lanes.)
●When the follow-up cruising dis-
play is displayed ( P.281) and
the preceding vehicle is sway-
ing. (Your vehicle may sway
accordingly and depart from the
lane.)
●When the follow-up cruising dis-
play is displayed ( P.281) and
the preceding vehicle departs
from its lane. (Your vehicle may
follow the preceding vehicle and
depart from the lane.)
●When the follow-up cruising dis-
play is displayed ( P.281) and
the preceding vehicle is being
driven extremely close to the
left/right lane line. (Your vehicle
may follow the preceding vehi-
cle and depart from the lane.)
●Vehicle is being driven around a
sharp curve.

2774-5. Using the driving support systems
4
Driving
WARNING
●Objects or patterns that could
be mistaken for white (yellow)
lines are present on the side of
the road (guardrails, reflective
poles, etc.).
●Vehicle is driven where the road
diverges, merges, etc.
●Repair marks of asphalt, white
(yellow) lines, etc. are present
due to road repair.
●There are shadows on the road
that run parallel with, or cover,
the white (ye llow) lines.
●The vehicle is driven in an area
without white (yellow) lines,
such as in front of a tollgate or
checkpoint, or at an intersec-
tion, etc.
●The white (yellow) lines are
cracked, “Botts’ dots”, “Raised
pavement marker” or stones are
present.
●The white (yellow) lines cannot
be seen or are difficult to see
due to sand, etc.
●The vehicle is driven on a road
surface that is wet due to rain,
puddles, etc.
●The traffic lines are yellow
(which may be more difficult to
recognize than lines that are
white).
●The white (yellow) lines cross
over a curb, etc.
●The vehicle is driven on a bright
surface, such as concrete.
●If the edge of the road is not
clear or straight.
●The vehicle is driven on a sur-
face that is bright due to
reflected light, etc.
●The vehicle is driven in an area
where the brightness changes
suddenly, such as at the
entrances and ex its of tunnels,
etc.
●Light from the headlights of an
oncoming vehicle, the sun, etc.
enters the camera.
●The vehicle is driven on a slope.
●The vehicle is driven on a road
which tilts left or right, or a wind-
ing road.
●The vehicle is driven on an
unpaved or rough road.

2784-5. Using the driving support systems
■Lane departure alert func-
tion
When the system determines that the vehicle might depart
from its lane or course
*, a warn-
ing is displayed on the multi-
information display, and either a
warning buzzer will sound or the
steering wheel will vibrate to
alert the driver.
When the warning buzzer sounds
or the steering wheel vibrates,
check the area around your vehicle
and carefully operate the steering
wheel to move the vehicle back to
the center of the lane.
Vehicle with BSM: When the sys-
tem determines that the vehicle
might depart from its lane and that
the possibility of a collision with an
overtaking vehicle in the adjacent
lane is high, the lane departure
alert will operate even if the turn
signals are operating.
*: Boundary between asphalt and the side of the road, such as
grass, soil, or a curb
WARNING
●The traffic lane is excessively
narrow or wide.
●The vehicle is extremely tilted
due to carrying heavy luggage
or having improper tire pres-
sure.
●The distance to the preceding
vehicle is extremely short.
●The vehicle is moving up and
down a large amount due to
road conditions during driving
(poor roads or road seams).
●When driving in a tunnel or at
night with the headlights off or
when a headlight is dim due to
its lens being dirty or it being
misaligned.
●The vehicle is struck by a cross-
wind.
●The vehicle is affected by wind
from a vehicle driven in a
nearby lane.
●The vehicle has just changed
lanes or crossed an intersec-
tion.
●Tires which differ by structure,
manufacturer, b rand or tread
pattern are used.
●When tires of a size other than
specified are installed.
●Snow tires, etc. are equipped.
●The vehicle is being driven at
extremely high speeds.
Functions included in
LTA system

3174-5. Using the driving support systems
4
Driving
■The rear camera detection func-
tion is operational when
●The power switch is in ON.
●RCD function is on.
●The shift lever is in R.
■Setting the buzzer volume
The buzzer volume can be adjusted
on the multi-inform ation display.
(  P.112)
■Muting the buzzer sound
The buzzer can be temporarily
muted by pressing “OK” of the meter
control switches w hile a suggestion
that says mute is available is shown
on the multi-info rmation display.
■If “Rear Camera Detection
Unavailable Remove the Dirt of
Rear Camera” is displayed on
the multi-information display
A rear camera lens may be dirty or
covered with snow or ice. In such
cases, if it is removed from the rear
camera lens, the system should
return to normal. ( It may be neces-
sary to drive the vehicle for some
time before the system returns to
normal. Even afte r the camera
cleaning washer operated, driving
the vehicle may al so be necessary.)
■If “Rear Camera Detection
Unavailable See Owner’s Man-
ual” is displayed on the multi-
information display
●If this message is displayed after
the 12-volt battery has been dis-
connected and reconnected, fully
turn the steering wheel to the left
and then the right on level ground.
●If this message is displayed only
when the shift lever is in R, the
rear camera lens may be dirty.
Clean the rear camera lens.
■Situations in which the system
may not operate properly
●Some pedestrians, such as the
following, may not be detected by
the rear camera detection func- tion, preventing the function from
operating properly:
• Pedestrians who are bending for-
ward or squatting
• Pedestrians who are lying down
• Pedestrians who are running
• Pedestrians who suddenly enter the detection area
• People riding a bicycle, skate-
board, or other light vehicle
• Pedestrians wearing oversized clothing such as a rain coat, long
skirt, etc., making their silhouette
obscure
• Pedestrians whose body is par-
tially hidden by an object, such as
a cart or umbrella
• Pedestrians which are obscured
by darkness, such as at night
●In some situations, such as the
following, pedestrians may not be
detected by the rear camera
detection function, preventing the
function from operating properly:
• When backing up in inclement weather (rain, snow, fog, etc.)
• When the rear camera is obscured (dirt, snow, ice, etc. are
attached) or scratched
• When a very bright light, such as the sun, or the headlights of
another vehicle, shines directly
into the rear camera
• When backing up in a place where the surrounding brightness
changes suddenly, such as at the
entrance or exi t of a garage or
underground parking lot
• When backing up in a dim envi- ronment such as during dusk or in
an underground parking lot
• When the dedicated camera cleaning washer is operating
●Even though there are no pedes-
trians in the detection area, some
objects, such as the following,
may be detected, possibly caus-
ing the rear cam era detection
function to operate.
• Three dimensional objects, such
as a pole, traffic cone, fence, or
parked vehicle
• Moving objects, such as a car or

4516-3. Do-it-yourself maintenance
6
Maintenance and care
Check the wattage of the light
bulb to be replaced. (P.526)
Rear turn signal lights
Back-up lights
License plate lights
■Lights that need to be
replaced by your Toyota
dealer
 Headlights 
Daytime running lights
 Front turn signal/parking
lights
 Front side marker lights
 Side turn signal lights
 Tail lights
 Stop lights
 Fog lights (if equipped)
 Rear side marker lights
 High mounted stoplight
 Outer foot lights (if equipped)
■LED lights
The lights other than the following
lights each consist of a number of
LEDs. If any of t he LEDs burn out,
take your vehicle to your Toyota
dealer to have the light replaced.
●Rear turn signal lights
●Back-up lights
●License plate lights
■Condensation build-up on the
inside of the lens
Temporary condensation build-up
on the inside of the light lens does
not indicate a mal function. Contact
your Toyota dealer for more infor-
mation in the following situations:
●Large drops of water have built up
on the inside of the lens.
●Water has built up inside the light.
■When replacing light bulbs
 P.450
■Rear turn signal lights
1 Open the back door.
Light bulbs
You may replace the follow-
ing bulbs by yourself. The
difficulty level of replace-
ment varies depending on
the bulb. If necessary bulb
replacement seems difficult
to perform, contact your
Toyota dealer.
For more information about
replacing other light bulbs,
contact your Toyota dealer.
Preparing for light bulb
replacement
Bulb location
A
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5017-2. Steps to take in an emergency
7
When trouble arises
One of the following may be the
cause of the problem:
The electronic key may not be
functioning properly.
( P.504)
 There may not be sufficient
fuel in the vehicle’s tank.
Refuel the vehicle. ( P.259)
 There may be a malfunction
in the immobilizer system.
( P.88)
 There may be a malfunction
in the steering lock system.
 The hybrid system may be
malfunctioning due to an elec-
trical problem such as elec-
tronic key battery depletion or
a blown fuse. However,
depending on the type of mal-
function, an interim measure
is available to start the hybrid
system. ( P.501) One of the following may be the
cause of the problem:

The 12-volt battery may be
discharged. ( P.506)
 The 12-volt battery terminal
connections may be loose or
corroded. ( P.423)
One of the following may be the
cause of the problem:
 The 12-volt battery may be
discharged. ( P.506)
 One or both of the 12-volt bat-
tery terminals may be discon-
nected. ( P.423)
Contact your Toyota dealer if
the problem cannot be repaired,
or if repair procedures are
unknown.
When the hybrid system does
not start, the following steps can
be used as an interim measure
to start the hybrid system if the
power switch is functioning nor-
If the hybrid system
will not start
Reasons for the hybrid sys-
tem not starting vary
depending on the situation.
Check the following and
perform the appropriate
procedure:
The hybrid system will not
start even though the cor-
rect starting procedure is
being followed ( P.231)
The interior lights and
headlights are dim, or the
horn does not sound or
sounds at a low volume
The interior lights and
headlights do not turn on,
or the horn does not
sound
Starting the hybrid sys-
tem in an emergency

5087-2. Steps to take in an emergency
possible.
■Starting the hybrid system
when the 12-volt battery is dis-
charged
The hybrid system cannot be
started by push-starting.
■To prevent 12-vol t battery dis-
charge
●Turn off the headlights and the
audio system while the hybrid sys-
tem is off.
●Turn off any unnec essary electri-
cal components when the vehicle
is running at a low speed for an
extended period, such as in heavy
traffic.
■When the 12-volt battery is
removed or discharged
●Information stor ed in the ECU is
cleared. When the 12-volt battery
is depleted, have the vehicle
inspected at your Toyota dealer.
●Some systems may require initial-
ization. ( P.554)
■When removing the 12-volt bat-
tery terminals
When the 12-volt battery terminals
are removed, the information stored
in the ECU is cleared. Before
removing the 12- volt battery termi-
nals, contact your Toyota dealer.
■Charging the 1 2-volt battery
The electricity stor ed in the 12-volt
battery will discharge gradually even
when the vehicle is not in use, due
to natural discharge and the drain-
ing effects of certa in electrical appli-
ances. If the vehicle is left for a long
time, the 12-volt battery may dis-
charge, and the hybrid system may
be unable to start. (The 12-volt bat-
tery recharges aut omatically while
the hybrid system is operating.)
■When recharging or replacing
the 12-volt battery
●In some cases, i t may not be pos-
sible to unlock the doors using the smart key system when the 12-
volt battery is discharged. Use the
wireless remote c
ontrol or the
mechanical key to lock or unlock
the doors.
●The hybrid syste m may not start
on the first attemp t after reinstall-
ing the 12-volt battery. In that
case, start the hybrid system in
the same manner as when the
electronic key does not operate
properly ( P.505). This is not a
malfunction, as the hybrid system
will start normally on the second
attempt.
●The power switch mode is memo-
rized by the vehicle. When the 12-
volt battery is reconnected, the
system will return to the mode it
was in before the 12-volt battery
was discharged. Before discon-
necting the 12-volt battery, turn
the power switch off.
If you are unsure what mode the
power switch was in before the
12-volt battery discharged, be
especially careful when recon-
necting the 12-volt battery.
■When replacing t he 12-volt bat-
tery
●Use a 12-volt battery that con-
forms to European regulations.
Use a battery that the case size is
same as the previous one (LN2),
20 hours rate ca pacity (20HR) is
equivalent (60Ah) or greater, and
performance rating (CCA) is
equivalent (563A) or greater.
• If the sizes differ , the 12-volt bat-
tery cannot be properly secured.
• If the 20 hour rate capacity is low,
even if the time p eriod where the
vehicle is not used is a short time,
the 12-volt battery may discharge
and hybrid system may not be
able to start.
●Use a 12-volt battery with a han-
dle. If a 12-volt battery without a
handle is used, removal is more
difficult.
●When removing the 12-volt bat-

5238-1. Specifications
8
Vehicle specifications
*: The fluid capacity is the quantity of reference.If replacement is necessary, contact y our Toyota dealer.
*: The fluid capacity is the quantity of reference.
If replacement is necessary, contact y our Toyota dealer.
NOTICE
■Iridium-tipped spark plugs
Use only iridium-tipped spark plugs. Do not adjust the spark pl ug gap.
Electrical system (12-volt Battery)
Open voltage at 68°F (20°C):
12.0 V or higher
(Turn the power switch to OFF and turn on
the high beam headlights for 30 seconds.)
If the voltage is lower than the standard
value, charge the battery.
Charging rates5 A max.
Hybrid transmission
Fluid capacity*4.6 qt. (4.4 L, 3.9 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Hybrid transmission fluid type
Using transmission fluid other than the above type may cause ab normal
noise or vibration, or ultimately damage the transmission of yo ur vehicle.
Rear differential (rear electric motor) (AWD models)
Fluid capacity*1.8 qt. (1.7 L, 1.5 Imp.qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than the above type may cause ab normal
noise or vibration, or ultimately damage the transmission of yo ur vehicle.