2021 TOYOTA SIENNA HYBRID Power

3434-6. Driving tips
4
Driving
Use fluids that are appropriate
to the prevailing outside tem-
peratures.
• Engine oil
• Engine coolant
• Power control unit coolant
• Washer fluid
Have a service technician
inspect the condition of the
12-volt battery.
 Have the vehicle fitted with
four snow tires or purchase a
set of tire chains for the front
tires.
*
Ensure that all tires are the same
size and brand, and that chains
match the size of the tires.
*: Tire chains cannot be mounted
on vehicles with 20-inch tires.
Winter driving tips
Carry out the necessary
preparations and inspec-
tions before driving the
vehicle in winter. Always
drive the vehicle in a man-
ner appropriate to the pre-
vailing weather conditions.
Pre-winter preparations
WARNING
■Driving with snow tires
Observe the following precautions
to reduce the risk of accidents.
Failure to do so may result in a
loss of vehicle control and cause
death or serious injury.
●Use tires of the specified size.
●Maintain the recommended
level of air pressure.
●Do not drive in excess of 75
mph (120 km/h), regardless of
the type of snow tires being
used.
●Use snow tires on all, not just
some wheels.
■Driving with tire chains (vehi-
cles with 17-inch or 18-inch
tires)
Observe the following precautions
to reduce the risk of accidents.
Failure to do so may result in the
vehicle being unable to be driven
safely, and may cause death or
serious injury.
●Do not drive in excess of the
speed limit specifi ed for the tire
chains being used, or 30 mph
(50 km/h), whichever is lower.
●Avoid driving on bumpy road
surfaces or over potholes.
●Avoid sudden acceleration,
abrupt steering, sudden brak-
ing and shifting operations that
cause sudden engine braking.
●Slow down sufficiently before
entering a curve to ensure that
vehicle control is maintained.
●Do not use LTA (Lane Tracing
Assist) system.

3505-1. Using the air conditioning system and defogger
switch.
■Defogging the rear window
and outside rear view mir-
rors (if equipped), and de-
icing windshield wipers (if
equipped)
Defoggers are used to defog the
rear window and to remove rain-
drops, dew and frost from the
outside rear view mirrors (if
equipped).
The windshield wiper de-icer is
used to prevent ice from building
up on the windshield and wiper
blades.
Press the rear window defog-
ger/outside rear view mirror
defoggers /windshield wiper de-
icer switch.
The defoggers and windshield
wiper de-icer will automatically turn
off after 15 minutes.
When the rear window defog-
ger/outside rear v iew mirror defog-
gers /windshield wiper de-icer
switch is on, the indicator illumi-
nates on the switch.
■Eco air conditioning mode
The air conditioning is controlled
with low fuel consumption priori-
tized such as reducing fan
speed, etc.
Select the eco air conditioning
mode switch on the control
screen. ( P.352)
When the eco air conditioning
mode is on, the indicator illumi-
nates on the eco air conditioning mode switch.
■Fogging up of the windows
●The windows will
easily fog up
when the humidity in the vehicle is
high. Turning “A/C” switch on will
dehumidify the air from the outlets
and defog the windshield effec-
tively.
●If you turn “A/C” switch off, the
windows may fog up more easily.
●The windows may fog up if the
recirculated air mode is used.
■When driving on dusty roads
Close all windows. If dust thrown up
by the vehicle is still drawn into the
vehicle after closing the windows, it
is recommended that the air intake
mode be set to outside air mode
and the fan speed to any setting
except off.
■Outside/recirculated air mode
●Setting to the recirculated air
mode temporarily is recom-
mended in preventing dirty air
from entering the vehicle interior
and helping to c ool the vehicle
when the outside air temperature
is high.
●Outside/recirculated air mode may
automatically switch depending on
the temperature setting or the
inside temperature.
■When the outside temperature
exceeds 75°F (24°C) and the air
conditioning system is on
●In order to reduce the air condi-
tioning power consumption, the air
conditioning system may switch to
recirculated air mode automati-
cally. This may also reduce fuel
consumption.
●Recirculated air mode is selected
as a default mode when the power
switch is turned to ON.
●It is possible to switch to outside
air mode at any time by pressing
the outside/recirculated air mode

3545-1. Using the air conditioning system and defogger
for functions other than that
operated is maintained.
■Using automatic mode
Fan speed is adjusted automati-
cally according to the temperature
setting and the ambient conditions.
Therefore, the fan may stop for a
while until warm or cool air is ready
to flow immediately after the auto-
matic mode switch is pressed.
This function automatically con-
trols the air conditioning airflow
so that priority is given to the
front seats. When the front pas-
senger seat is not occupied, air-
flow may switch to only the
driver’s seat. Unnecessary air
conditioning is suppressed, con-
tributing to increased fuel effi-
ciency.
Front seat concentrated airflow
mode operates in the following
situations.
 No passengers are detected
in the rear seats
 The windshield defogger is
not operating
While operating, illumi-
nates.
■Manually turning front seat
concentrated airflow mode
on/off
In front seat concentrated air-
flow mode, directing airflow to the front seats only and to all
seats can be switched via switch
operation. When the mode has
been switched manually, auto-
matic airflow control stops oper-
ating.
Press on the air condition-
ing operation panel and switch
the airflow.

Indicator illuminated: Airflow
to the front seats only
 Indicator off: Airflow to all the
seats
■Operation of automatic airflow
control
●In order to maintain a comfortable
interior, airflow may be directed to
seats without passengers immedi-
ately after the hybrid system is
started and at other times depend-
ing on the outside temperature.
●After the hybrid system is started,
if passengers move around inside
or enter/exit the vehicle, the sys-
tem cannot accura tely detect the
presence of passengers and auto-
matic airflow co ntrol will not oper-
ate.
■Operation of manual airflow
control
Even if the funct ion is manually
switched to directing airflow to only
the front seats, w hen a rear seat is
occupied, it may automatically direct
airflow to all seats.
■To return to automatic airflow
control
1 With the indicator off, turn the
power switch off.
2 After 60 minutes or more elapse,
turn the power switch to ON.
Front seat concentrated
airflow mode (S-FLOW)

3615-1. Using the air conditioning system and defogger
5
Interior features
*: If equipped
Turns the heated steering wheel
on/off
The indicator light comes on when
the heated steering wheel is oper-
ating.
■Operation condition
The power switch is in ON.
Each time the switch is pressed,
the operation condition changes
as follows.
Hi (3 segments lit)  Mid (2
segments lit)  Lo (1 segment
Heated steering
wheel*/seat heat-
ers*/seat ventilators*
 Heated steering wheel
Warm up the grip of the steer-
ing wheel
 Seat heaters
Warm up the seat upholstery
 Seat ventilators
Maintain good ventilation by
sucking air through the seat
upholstery
WARNING
■To prevent minor burn inju-
ries
Care should be taken if anyone in
the following categories comes in
contact with the steering wheel or
seats when the heater is on:
●Babies, small children, the
elderly, the sick and the physi-
cally challenged
●Persons with sensitive skin
●Persons who are fatigued
●Persons who have taken alco-
hol or drugs that induce sleep
(sleeping drugs, cold remedies,
etc.)
NOTICE
■To prevent damage to the
seat heaters and seat ventila-
tors
Do not put heavy objects that
have an uneven surface on the
seat and do not stick sharp
objects (needles, nails, etc.) into
the seat.
■To prevent 12-volt battery dis-
charge
Do not use the functions when the
hybrid system is off.
Heated steering wheel
Operating the seat heat-
ers

3625-1. Using the air conditioning system and defogger
lit)  Off
The level indicato r lights up during
operation.
Front
Rear (second outboard seats)
(if equipped)
■Operation condition
The power swit ch is in ON. Each time the switch is pressed,
the operation condition changes as
follows.
Hi (3 segments lit)
 Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
The level indicato r lights up during
operation.
■Operation condition
The power switch is in ON.
■Air conditioning system-linked
control mode
When a seat ventilator is set to Hi,
the fan speed of the seat ventilator
may increase according to the fan
speed of the air conditioning sys-
tem.
WARNING
■To prevent causes of over-
heating and minor burn inju-
ries
Observe the following precautions
when using a seat heater:
●Do not cover the seat with a
blanket or cushion when using
the seat heater.
●Do not use seat heater more
than necessary.
Operating the seat venti-
lators (front seats)

3635-2. Using the interior lights
5
Interior features
5-2.Using the interior lights
Power switch illumination (P.231)
Front interior lights/personal lights
*1 (  P.364, 364)
Shift lever light (if equipped)
Open tray light
*2 (if equipped)
Door courtesy lights
*1 (if equipped)
Console tray light
*2
Second row personal lights (Type A)*1 (  P.364)
Second row personal lights (Type B)
*1 (if equipped) ( P.364)
Third row interior light
*1 (  P.364)
Outer foot lights (if equipped)
*1: These lights turn on when a door is opened. When the shift lev er is in a
position other than P, these lights turn off.
*2: When the shift lever is in a pos ition other than P, the brightness of these
lights will reduce intensity.
Interior lights list
Location of the i nterior lights
A
B
C
D
E
F
G
H
I
J

3655-2. Using the interior lights
5
Interior features
together the front interior lights.
When a door is opened while the
front and rear interior light door
position is on, the lights turn on.
2Turns the light on
■Illuminated entry system
The lights automati cally turn on/off
according to the power switch
mode, the presence of the elec-
tronic key, whether the doors are
locked/unlocked, and whether the
doors are opened/closed.
■To prevent the 12-volt battery
from being discharged
If the interior lights remain on when
the power switch is turned to OFF,
the lights will go off automatically
after 20 minutes.
■The interior lights will turn on
automatically when
If any of the SRS airbags deploy
(inflate) or in the event of a strong
rear impact, the interior lights will
turn on automatically.
The interior lights will turn off auto-
matically after approximately 20
minutes.
The interior lights can be turned off
manually. However, in order to help
prevent further collisions, it is rec-
ommended that they be left on until
safety can be ensured.
(The interior lights may not turn on
automatically depending on the
force of the impact and conditions of
the collision.)
■Customization
Setting (e.g. the time elapsed before
the lights turn off) can be changed.
(Customizable features: P.552)
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the lights on longer
than necessary when the hybrid
system is off.

3745-4. Using the other interior features
5-4.Using the other interior features
1To set the visor in the forward
position, flip it down.
2 To set the visor in the side
position, flip down, unhook,
and swing it to the side.
Slide the cover to open.
The light turns on when the cover is
opened.
■Automatic light off to prevent
12-volt battery discharge
If the vanity light s remain on when
the power switch is turned to OFF,
the lights will go off automatically
after 20 minutes.
Please use a power supply for
electronic goods that use less
than 12 VDC /10 A (power con-
sumption of 120 W).
When using electronic goods,
make sure that the power con-
sumption of all the connected
power outlets is less than 120
W.
Open the lid.
■The power outlet can be used
when
The power switch is in ACC or ON.
■When stopping the hybrid sys-
tem
Disconnect electrical devices with
charging functions, such as mobile
battery packs.
If such devices are left connected,
the hybrid system may not stop nor-
mally.
Other interior features
Sun visors
Vanity mirrors
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the vanity lights on
for extended periods while the
hybrid system is off.
Power outlet (12 VDC)