Toyota Sienna Hybrid (2023 year). Manual in english

336

4-5. Using the driving support systems

■

VSC (Vehicle Stability Con-
trol)

Helps the driver to control skid-
ding when swerving suddenly or
turning on slippery road sur-
faces.

■

Enhanced VSC (Enhanced
Vehicle Stability Control)

Provides cooperative control of
the ABS, TRAC, VSC and EPS.
Helps to maintain directional
stability when swerving on slip-
pery road surfaces by con-
trolling steering performance.

■

Trailer Sway Control

Helps the driver to control trailer
sway by selectively applying
brake pressure for individual
wheels and reducing driving
torque when trailer sway is
detected.

■

TRAC (Traction Control)

Helps to maintain drive power
and prevent the drive wheels
from spinning when starting the
vehicle or accelerating on slip-
pery roads

■

Active Cornering Assist
(ACA)

Helps to prevent the vehicle
from drifting to the outer side by
performing inner wheel brake
control when attempting to
accelerate while turning

■

Hill-start assist control

Helps to reduce the backward

movement of the vehicle when
starting on an uphill

■

EPS (Electric Power Steer-
ing)

Employs an electric motor to
reduce the amount of effort
needed to turn the steering
wheel.

■

E-Four (Electronic On-
Demand AWD system)
(AWD models)

Automatically controls the drive
system such as to front-wheel
drive or AWD (all wheel drive)
according to various running
conditions including normal driv-
ing, during cornering, on a
uphill, when starting off, during
acceleration, on a slippery roads
due to snow or rain, thus con-
tributing to stable operability and
driving stability.

■

The Secondary Collision
Brake

When the SRS airbag sensor
detects a collision and the sys-
tem operates, the brakes and
brake lights are automatically
controlled to reduce the vehicle
speed and help reduce the pos-
sibility of further damage due to
a secondary collision.

■

When the

TRAC/VSC/ABS/Trailer Sway

Control systems are operating

The slip indicator light will flash

while the TRAC/VSC/ABS/Trailer

Sway Control systems are operat-

ing.

337

4-5. Using the driving support systems

ing

■

Disabling the TRAC system

If the vehicle gets stuck in mud, dirt

or snow, the TRAC system may

reduce power from the hybrid sys-

tem to the wheels.

Pressing

to turn the system off

may make it easier for you to rock
the vehicle in order to free it.
To turn the TRAC system off,
quickly press and release

The “Traction Control Turned Off”

will be shown on the multi-informa-

tion display.

Press

again to turn the system

back on.

■

Turning off the

TRAC/VSC/Trailer Sway Con-

trol systems

To turn the TRAC/VSC/Trailer Sway
Control systems off, press and hold

for more than 3 seconds while

the vehicle is stopped.
The VSC OFF indicator light will

come on and the “Traction Control

Turned Off” will be shown on the
multi-information display.

Press

again to turn the systems

back on.

: PCS (Pre-Collision System) will

also be disabled (only the pre-col-
lision warning function is avail-
able). The PCS warning light will
come on and the message will be
shown on the multi-information
display. (



P.277)

■

When the message is dis-
played on the multi-information
display showing that TRAC has
been disabled even if

has

not been pressed

TRAC is temporary deactivated. If

the information continues to show,

contact your Toyota dealer.

■

Operating conditions of hill-

start assist control

When all of the following conditions

are met, the hill-start assist control

will operate.

●

The shift lever is in a position

other than P or N (when starting

off forward/backward on an

upward incline)

●

The vehicle is stopped

●

The accelerator pedal is not

depressed

●

The parking brake is not engaged

■

Automatic system cancelation

of hill-start assist control

The hill-start assist control will turn

off in any of the following situations:

●

The shift lever is shifted to P or N

●

The accelerator pedal is

depressed

●

The parking brake is engaged

●

2 seconds at maximum elapsed

after the brake pedal is released

338

4-5. Using the driving support systems

■

Sounds and vibrations caused

by the ABS, brake assist, VSC,

TRAC, Trailer Sway Control and

hill-start assist control systems

●

A sound may be heard from the

engine compartment when the

brake pedal is depressed repeat-

edly, when the hybrid system is

started or just after the vehicle

begins to move. This sound does

not indicate that a malfunction has

occurred in any of these systems.

●

Any of the following conditions

may occur when the above sys-

tems are operating. None of these

indicates that a malfunction has

occurred.

• Vibrations may be felt through the

vehicle body and steering.

• A motor sound may be heard also

after the vehicle comes to a stop.

■

ECB operating sound

ECB operating sound may be heard

in the following cases, but it does

not indicate that a malfunction has

occurred.

●

Operating sound heard from the

engine compartment when the

brake pedal is operated.

●

Motor sound of the brake system

heard from the front part of the

vehicle when the driver’s door is

opened.

●

Operating sound heard from the

engine compartment when one or

two minutes passed after the stop

of the hybrid system.

■

Active Cornering Assist opera-

tion sounds and vibrations

When the Active Cornering Assist is

operated, operation sounds and

vibrations may be generated from

the brake system, but this is not a

malfunction.

■

EPS operation sound

When the steering wheel is oper-

ated, a motor sound (whirring

sound) may be heard. This does not

indicate a malfunction.

■

Automatic reactivation of

TRAC, Trailer Sway Control and

VSC systems

After turning the TRAC, Trailer

Sway Control and VSC systems off,

the systems will be automatically re-

enabled in the following situations:

●

When the power switch is turned

off

●

If only the TRAC system is turned

off, the TRAC will turn on when

vehicle speed increases

If both the TRAC and VSC sys-

tems are turned off, automatic re-

enabling will not occur when vehi-

cle speed increases.

■

Operating conditions of Active

Cornering Assist

The system operates when the fol-

lowing occurs.

●

TRAC/VSC can operate

●

The driver is attempting to accel-

erate while turning

●

The system detects that the vehi-

cle is drifting to the outer side

●

The brake pedal is released

■

Reduced effectiveness of the

EPS system

The effectiveness of the EPS sys-

tem is reduced to prevent the sys-

tem from overheating when there is

frequent steering input over an

extended period of time. The steer-

ing wheel may feel heavy as a

result. Should this occur, refrain

from excessive steering input or

stop the vehicle and turn the hybrid

system off. The EPS system should

return to normal within 10 minutes.

■

Secondary Collision Brake

operating conditions

The system operates when the SRS

airbag sensor detects a collision

while the vehicle is in motion. How-

ever, the system does not operate

when the components are dam-

aged.

339

4-5. Using the driving support systems

ing

■

Secondary Collision Brake

automatic cancellation

The system is automatically can-

celed in any of the following situa-

tions.

●

The vehicle speed drops to

approximately 6 mph (10 km/h).

●

A certain amount of time elapses

during operation

●

The accelerator pedal is

depressed a large amount

■

If a message about AWD is

shown on the multi-information

display (AWD models)

Perform the following actions.

●

“AWD System Overheated

Switching to 2WD Mode”

AWD system is overheated. Stop
the vehicle in a safe place with the
hybrid system operating.

If the message disappears after a
while, there is no problem. If the
message remains, have the vehicle
inspected by your Toyota dealer
immediately.

●

“AWD System Overheated 2WD

Mode Engaged”

AWD system has been temporarily
released and switched to front-
wheel drive due to overheating.
Stop the vehicle in a safe place with
the hybrid system operating.

If the message disappears after a
while, AWD system will automati-
cally recover. If the message
remains, have the vehicle inspected
by your Toyota dealer immediately.

●

“AWD system Malfunction 2WD

Mode Engaged Visit Your Dealer”

A malfunction occurs in the AWD
system. Have the vehicle inspected
by your Toyota dealer immediately.

: When stopping the vehicle, do not

stop the hybrid system until the
display message has turned off.

WARNING

■

The ABS does not operate

effectively when

●

The limits of tire gripping perfor-

mance have been exceeded

(such as excessively worn tires

on a snow covered road).

●

The vehicle hydroplanes while

driving at high speed on wet or

slick roads.

■

Stopping distance when the

ABS is operating may exceed

that of normal conditions

The ABS is not designed to

shorten the vehicle’s stopping dis-

tance. Always maintain a safe dis-

tance from the vehicle in front of

you, especially in the following sit-

uations:

●

When driving on dirt, gravel or

snow-covered roads

●

When driving with tire chains

●

When driving over bumps in the

road

●

When driving over roads with

potholes or uneven surfaces

■

TRAC/VSC may not operate

effectively when

Directional control and power may

not be achievable while driving on

slippery road surfaces, even if the

TRAC/VSC system is operating.

Drive the vehicle carefully in con-

ditions where stability and power

may be lost.

340

4-5. Using the driving support systems

WARNING

■

Active Cornering Assist does

not operate effectively when

●

Do not overly rely on Active

Cornering Assist. Active Corner-

ing Assist may not operate

effectively when accelerating

down slopes or driving on slip-

pery road surfaces.

●

When Active Cornering Assist

frequently operates, Active Cor-

nering Assist may temporarily

stop operating to ensure proper

operation of the brakes, TRAC

and VSC.

■

Hill-start assist control does

not operate effectively when

●

Do not overly rely on hill-start

assist control. Hill-start assist

control may not operate effec-

tively on steep inclines and

roads covered with ice.

●

Unlike the parking brake, hill-

start assist control is not

intended to hold the vehicle sta-

tionary for an extended period

of time. Do not attempt to use

hill-start assist control to hold

the vehicle on an incline, as

doing so may lead to an acci-

dent.

■

When the

TRAC/ABS/VSC/Trailer Sway

Control is activated

The slip indicator light flashes.

Always drive carefully. Reckless

driving may cause an accident.

Exercise particular care when the

indicator light flashes.

■

When the TRAC/VSC/Trailer

Sway Control systems are

turned off

Be especially careful and drive at

a speed appropriate to the road

conditions. As these are the sys-

tems to help ensure vehicle stabil-

ity and driving force, do not turn

the TRAC/VSC/Trailer Sway Con-

trol systems off unless necessary.
Trailer Sway Control is part of the

VSC system and will not operate

if VSC is turned off or experiences

a malfunction.

■

Replacing tires

Make sure that all tires are of the

specified size, brand, tread pat-

tern and total load capacity. In

addition, make sure that the tires

are inflated to the recommended

tire inflation pressure level.

The ABS, TRAC, Trailer Sway

Control and VSC systems will not

function correctly if different tires

are installed on the vehicle.

Contact your Toyota dealer for

further information when replacing

tires or wheels.

■

Handling of tires and the sus-

pension

Using tires with any kind of prob-

lem or modifying the suspension

will affect the driving assist sys-

tems, and may cause a system to

malfunction.

■

Trailer Sway Control precau-

tion

The Trailer Sway Control system

is not able to reduce trailer sway

in all situations. Depending on

many factors such as the condi-

tions of the vehicle, trailer, road

surface and driving environment,

the Trailer Sway Control system

may not be effective. Refer to

your trailer owner’s manual for

information on how to tow your

trailer properly.

341

4-5. Using the driving support systems

ing

WARNING

■

If trailer sway occurs

Observe the following precau-

tions.

Failing to do so may cause death

or serious injury.

●

Firmly grip the steering wheel.

Steer straight ahead. Do not try

to control trailer sway by turning

the steering wheel.

●

Begin releasing the accelerator

pedal immediately but very

gradually to reduce speed.

Do not increase speed. Do not

apply vehicle brakes.

If you make no extreme correction
with the steering or brakes, your
vehicle and trailer should stabi-
lize. (



P.222)

■

Secondary Collision Brake

Do not rely solely upon the Sec-

ondary Collision Brake. This sys-

tem is designed to help reduce

the possibility of further damage

due to a secondary collision, how-

ever, that effect changes accord-

ing to various conditions. Overly

relying on the system may result

in death or serious injury.

342

4-6. Driving tips

4-6.Driving tips

When using Eco drive mode, the
torque corresponding to the
accelerator pedal depression
amount can be generated more
smoothly than it is in normal
conditions. In addition, the oper-
ation of the air conditioning sys-
tem (heating/cooling) will be
minimized, improving the fuel
economy. (



P.334)

The Eco-friendly driving is pos-
sible by keeping the indicator of
Hybrid System Indicator within
Eco area. (



P.98, 102)

Shift the shift lever to D when
stopped at a traffic light, or driv-
ing in heavy traffic etc. Shift the
shift lever to P when parking.
When using the N position,
there is no positive effect on fuel
consumption. In the N position,
the gasoline engine operates

but electricity cannot be gener-
ated. Also, when using the air
conditioning system, etc., the
hybrid battery (traction battery)
power is consumed.



Drive your vehicle smoothly.
Avoid abrupt acceleration and
deceleration. Gradual accel-
eration and deceleration will
make more effective use of
the electric motor (traction
motor) without having to use
gasoline engine power.



Avoid repeated acceleration.
Repeated acceleration con-
sumes hybrid battery (trac-
tion battery) power, resulting
in poor fuel consumption. Bat-
tery power can be restored by
driving with the accelerator
pedal slightly released.

Make sure to operate the brakes
gently and in a timely manner. A
greater amount of electrical
energy can be regenerated
when slowing down.

Repeated acceleration and
deceleration, as well as long
waits at traffic lights, will lead to
bad fuel economy. Check traffic

Hybrid Electric Vehi-

cle driving tips

For economical and ecolog-
ical driving, pay attention to
the following points:

Using Eco drive mode

Use of Hybrid System
Indicator

Changing the shift posi-
tion

Accelerator pedal/brake
pedal operation

When braking

Delays

343

4-6. Driving tips

ing

reports before leaving and avoid
delays as much as possible.
When driving in a traffic jam,
gently release the brake pedal
to allow the vehicle to move for-
ward slightly while avoiding
overuse of the accelerator
pedal. Doing so can help control
excessive gasoline consump-
tion.

Control and maintain the vehicle
at a constant speed. Before
stopping at a toll booth or simi-
lar, allow plenty of time to
release the accelerator and gen-
tly apply the brakes. A greater
amount of electrical energy can
be regenerated when slowing
down.

Use the air conditioning only
when necessary. Doing so can
help reduce excessive gasoline
consumption.
In summer: When the ambient
temperature is high, use the
recirculated air mode. Doing so
will help to reduce the burden on
the air conditioning system and
reduce fuel consumption as
well.
In winter: Because the gasoline
engine will not automatically cut
out until it and the interior of the
vehicle are warm, it will con-

sume fuel. Also, fuel consump-
tion can be improved by
avoiding overuse of the heater.

Make sure to check the tire infla-
tion pressure frequently.
Improper tire inflation pressure
can cause poor fuel economy.
Also, as snow tires can cause
large amounts of friction, their
use on dry roads can lead to
poor fuel economy. Use tires
that are appropriate for the sea-
son.

Carrying heavy luggage will lead
to poor fuel economy. Avoid car-
rying unnecessary luggage.
Installing a large roof rack will
also cause poor fuel economy.

Since the gasoline engine starts
up and cuts out automatically
when cold, warming up the
engine is unnecessary. More-
over, frequently driving short
distances will cause the engine
to repeatedly warm up, which
can lead to excess fuel con-
sumption.

Highway driving

Air conditioning

Checking tire inflation
pressure

Luggage

Warming up before driv-
ing

344

4-6. Driving tips



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 specified 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.

345

4-6. Driving tips

ing

Perform the following according
to the driving conditions:



Do not try to forcibly open a
window or move a wiper that
is frozen. Pour warm water
over the frozen area to melt
the ice. Wipe away the water
immediately to prevent it from
freezing.



To ensure proper operation of
the climate control system
fan, remove any snow that
has accumulated on the air
inlet vents in front of the wind-
shield.



Check for and remove any
excess ice or snow that may
have accumulated on the
exterior lights, vehicle’s roof,
chassis, around the tires or on
the brakes.



Remove any snow or mud
from the bottom of your shoes
before getting in the vehicle.

Accelerate the vehicle slowly,
keep a safe distance between
you and the vehicle ahead, and
drive at a reduced speed suit-
able to road conditions.



Park the vehicle and move
the shift lever to P without set-
ting the parking brake. The
parking brake may freeze up,
preventing it from being
released. If the vehicle is
parked without setting the
parking brake, make sure to
block the wheels.
Failure to do so may be dan-
gerous because it may cause
the vehicle to move unexpect-
edly, possibly leading to an
accident.
When the parking brake is in
automatic mode, release the
parking brake after shifting
the shift lever to P. (



P.246)



If the vehicle is left parked
with the brakes damp in cold
temperatures, there is a pos-
sibility of the brakes freezing.



If the vehicle is parked without
setting the parking brake,
confirm that the shift lever
cannot be moved out of P

: The shift lever will be locked if it is

attempted to be shifted from P to
any other position without

NOTICE

■

Repairing or replacing snow

tires

Request repairs or replacement of

snow tires from your Toyota

dealer or legitimate tire retailers.

This is because the removal and

attachment of snow tires affects

the operation of the tire pressure

warning valves and transmitters.

Before driving the vehicle

When driving the vehicle

When parking the vehicle

346

4-6. Driving tips

depressing the brake pedal. If the
shift lever can be shifted from P,
there may be a problem with the
shift lock system. Have the vehi-
cle inspected by your Toyota
dealer immediately.



Vehicles with 17-inch or 18-
inch tires

Use the tire chains of correct
size and type.
Use SAE Class “S” type radial
tire chains, with the exception of
radial cable chains or V-bar type
chains.



Vehicles with 20-inch tires

Tire chains cannot be mounted.
Snow tires should be used
instead.

Regulations regarding the use
of tire chains vary depending on
location and type of road.
Always check local regulations
before installing chains.

■

Tire chain installation

Observe the following precautions

when installing and removing

chains:

●

Install and remove tire chains in a

safe location.

●

Install tire chains on the front tires

only. Do not install tire chains on

the rear tires.

●

Install tire chains on front tires as

tightly as possible. Retighten

chains after driving 1/4 - 1/2 mile

(0.5 - 1.0 km).

●

Install tire chains following the

instructions provided with the tire

chains.

WARNING

■

When parking the vehicle

When parking the vehicle without

applying the parking brake, make

sure to chock the wheels. If you

do not chock the wheels, the vehi-

cle may move unexpectedly, pos-

sibly resulting in an accident.

Selecting tire chains

Regulations on the use of
tire chains (vehicles with
17-inch or 18-inch tires)

NOTICE

■

Fitting tire chains

The tire pressure warning valves

and transmitters may not function

correctly when tire chains are fit-

ted.

347

Interior

featur

Interior features

5-1. Using the air conditioning

system and defogger

Front automatic air condi-

tioning system ...........

348

Rear automatic air condi-

tioning system ...........

358

Heated steering wheel/seat

heaters/seat ventilators

..................................

361

5-2. Using the interior lights

Interior lights list ..........

363

5-3. Using the storage features

List of storage features

366

Luggage compartment fea-

tures ..........................

372

5-4. Using the other interior

features

Other interior features .

374

Garage door opener....

388

348

5-1. Using the air conditioning system and defogger

5-1.Using the air conditioning system and defogger

“AUTO” switch (automatic mode)

“OFF” switch

Windshield defogger switch

Rear window defogger/outside rear view mirror defoggers/wind-
shield wiper de-icer switch

“A/C” switch

Outside/recirculated air mode switch

S-FLOW mode switch

Left-hand side temperature control switch

Fan speed control switch

“REAR” switch

“SYNC” switch

Airflow mode control switch

Right-hand side temperature control switch

■

Adjusting the temperature
setting

Operate the each side tempera-
ture control switch upwards to

increase the each side tempera-
ture and operate the switch
downwards to decrease the
each side temperature.

Front automatic air conditioning system

Air outlets and fan speed are automatically adjusted accord-
ing to the temperature setting.

Air conditioning controls

349

5-1. Using the air conditioning system and defogger

Interior

featur

The air conditioning system
switches between individual and
synchronous modes each time the
“SYNC” switch is operated.
(



P.355)

■

Setting the fan speed

Operate the fan speed control
switch upwards to increase the
fan speed and downwards to
decrease the fan speed.

Pressing the “OFF” switch turns off
the fan.

■

Change the airflow mode

Operate the airflow mode con-
trol switch.

The airflow mode changes as fol-
lows each time the switch is oper-
ated.

Upper body

Upper body and feet

Feet

Feet and the windshield
defogger operates

■

Switching between outside
air and recirculated air
modes

Press the outside/recirculated
air mode switch.

The mode switches between out-
side air mode and recirculated air
mode each time the switch is oper-
ated.
When recirculated air mode is
selected, the indicator illuminates
on the outside/recirculated air
mode switch.

■

Set cooling and dehumidifi-
cation function

Press the “A/C” switch.

When the function is on, the “A/C
ON” display on the front air condi-
tioning operation panel appears.

■

Defogging the windshield

Defoggers are used to defog the
windshield and front side win-
dows.
Press the windshield defogger
switch.

Set the outside/recirculated air
mode switch to outside air mode if
the recirculated air mode is used. (It
may switch automatically.)
To defog the windshield and the
side windows quickly, turn the air
flow and temperature up.
To return to the previous mode,
press the windshield defogger
switch again when the windshield is
defogged.
When the windshield defogger
switch is on, the indicator illumi-
nates on the windshield defogger

350

5-1. 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 view 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 cool 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

351

5-1. Using the air conditioning system and defogger

Interior

featur

switch.

■

Operation of the air condition-

ing system in Eco drive mode

●

In Eco drive mode, the air condi-

tioning system is controlled as fol-

lows to prioritize fuel efficiency:

• Engine speed and compressor

operation controlled to restrict

heating/cooling capacity

• Fan speed restricted when auto-

matic mode is selected

●

To improve air conditioning perfor-

mance, perform the following

operations:

• Adjust the fan speed

• Turn off Eco drive mode (



P.334)

• Turn off Eco air conditioning mode

●

When the driving mode is set to

Eco driving mode, the Eco air con-

ditioning mode will be turned on

automatically. Even in this case,

the Eco air conditioning mode can

be turned off by pressing the Eco

air conditioning mode switch.

■

When the outside temperature

falls to nearly 32°F (0°C)

The dehumidification function may

not operate even when “A/C” switch

is pressed.

■

Ventilation and air conditioning

odors

●

To let fresh air in, set the air condi-

tioning system to the outside air

mode.

●

During use, various odors from

inside and outside the vehicle may

enter into and accumulate in the

air conditioning system. This may

then cause odor to be emitted

from the vents.

●

To reduce potential odors from

occurring:

• It is recommended that the air

conditioning system be set to out-

side air mode prior to turning the

vehicle off.

• The start timing of the blower may

be delayed for a short period of

time immediately after the air con-

ditioning system is started in auto-

matic mode.

●

When parking, the system auto-

matically switches to outside air

mode to encourage better air cir-

culation throughout the vehicle,

helping to reduce odors that occur

when starting the vehicle.

■

Air conditioning filter



P.438

■

Air conditioning system refrig-

erant

●

A label regarding the refrigerant of

the air conditioning system is

attached to the hood at the loca-

tion shown in the following illustra-

tion.

●

The meaning of each symbol on

the label are as follows:

■

Customization

Some functions can be customized.

Caution

Air conditioning sys-
tem

Air conditioning sys-
tem lubricant type

Requires registered
technician to service
air conditioning sys-
tem

Flammable refrigerant

Toyota Sienna Hybrid (2023 year). Manual in english - page 21