2017 TOYOTA SIENNA Owners Manual

SIENNA_OM_OM08007U_(U)
4176-1. Using the air conditioning system and defogger
6
Interior features
■Location of air outlets
The air outlets and air volume
changes according to the
selected air flow mode.
■Adjusting the position of and opening and closing the air out-
lets
Turn the knob to open or close the vent.
Direct air flow to the left or right, up or down.
Air outlets
Center outletsRight and left side outlets
1
2

4186-1. Using the air conditioning system and defogger
SIENNA_OM_OM08007U_(U)
■Using automatic mode
Fan speed is adjusted automatically 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” button is pressed.
■ When the outside temperature exceeds 75°F (24°C) and the air condition-
ing system is on
●In order to reduce the air conditioning power consumption, the air condition-
ing system may switch to recirculated air mode automatically.
This may also reduce fuel consumption.
● Recirculated air mode is selected as a default mode when the engine switch
is turned to the “ON” position (vehicles without a smart key system) or
IGNITION ON mode (vehicles with a smart key system).
● It is possible to switch to outside air mode at any time by pressing .
■ Fogging up of the windows
●The windows will easily fog up when the humidity in the vehicle is high.
Pressing “A/C” button on will dehumidify the air from the outlets and defog
the windshield effectively.
● If you turn “A/C” off, the windows may fog up more easily.
● The windows may fog up if the recirculated air mode is used.
■ Outside/recirculated air mode
●When driving on dusty roads such as tunnels or in heavy traffic, set
to the recirculated air mode. This is effective in preventing outside air from
entering the vehicle interior. During cooling operation, setting the recircu-
lated air mode will also cool the vehicle interior effectively.
● Outside/recirculated air mode may automatically switch depending on the
temperature setting or the inside temperature.

SIENNA_OM_OM08007U_(U)
4196-1. Using the air conditioning system and defogger
6
Interior features
■Temperature display
The temperature display on the multi-information display can be changed.
( P. 624)
■ When
is selected for the air outlets used
For your driving comfort, air flowing to the feet may be warmer than air flow-
ing to the upper body depending on the temperature setting.
■ When the outside temperature is low
The dehumidification function may not operate even when the “A/C” button is
pressed.
■ When “A/C ON” flashes in the display
Press the “A/C” button and turn off the air conditioning system before turning it
on once more. There may be a problem in the air conditioning system if “A/C
ON” continues to flash. Turn the air conditioning system off and have it
inspected by your Toyota dealer.
■ Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning 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 outside 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 conditioning system is started in automatic
mode.
■ Air conditioning filter
P. 509
■ Customization
Settings (e.g. “AUTO” button linked operation) can be changed.
(Customizable features: P. 631)

4206-1. Using the air conditioning system and defogger
SIENNA_OM_OM08007U_(U)
WARNING
■To prevent the windshield from fogging up
●Do not use during cool air operat ion in extremely humid weather.
The difference between the temperature of the outside air and that of the
windshield can cause the outer surface of the windshield to fog up, block-
ing your vision.
■ To prevent burns
●Do not touch the rear view mirror surfaces when the outside rear view mir-
ror defoggers (vehicles with outside rear view mirror defoggers) are on.
● Do not touch the glass at lower part of the windshield or to the side of the
front pillars when the windshield wiper de-icer is on. (vehicles with wind-
shield wiper de-icer)
NOTICE
■To prevent battery discharge
Do not leave the air conditioning system on longer than necessary when the
engine is stopped.
●Do not place anything on the instrument
panel which may cover the air outlets.
Otherwise, air flow may be obstructed,
preventing the windshield defoggers
from defogging.

421
SIENNA_OM_OM08007U_(U)
6-1. Using the air conditioning system and defogger
6
Interior features
Rear automatic air conditioning system
■Adjusting the temperature setting
Press “” on the “TEMP” button to increase the temperature and “ ”
to decrease the temperature.
■Adjusting the fan speed
Press “ ” on to increase the fan speed and “ ” to decrease
the fan speed.
Press the “OFF” button to turn the fan off.
Airflow and outlets are automatically adjusted according to the
temperature setting.
Air conditioning controls

4226-1. Using the air conditioning system and defogger
SIENNA_OM_OM08007U_(U)■
Changing the air outlets
Press the “MODE” button.
The air flow mode switch each time the button is pressed.
Air flows to the upper body.
Air flows to the upper body
and feet.
Air flows to the feet.
Press the “AUTO” button (“AUTO” appears on the display).
Adjust the temperature setting.
To stop the operation, press the “OFF” button.
■Automatic mode indicator
If the fan speed setting or air fl ow modes are operated, the auto-
matic mode indicator goes off. However, automatic mode for func-
tions other than that operated is maintained.
■Location of air outlets
The air outlets and air volume
changes according to the
selected air flow mode.
1
2
3
Using automatic mode
Air outlets
1
2
3

SIENNA_OM_OM08007U_(U)
4236-1. Using the air conditioning system and defogger
6
Interior features
■Adjusting the position of the air outlets
Direct air flow to the front or
rear, up or down.
■Temperature display
The temperature display on the multi-information display can be changed.
( P. 624)
■ When the front air conditioning system is in simultaneous mode
The lower side indicator on the “SYNC” button is on. The rear air conditioning
system controls will continue to function. ( P. 412)
NOTICE
■To prevent battery discharge
Do not leave the air conditioning system on longer than necessary when the
engine is stopped.

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SIENNA_OM_OM08007U_(U)
6-1. Using the air conditioning system and defogger
Heated steering wheel/seat heaters
: If equipped
Heated steering wheel and seat heaters heat the side grips of the
steering wheel and seats, respectively.
WARNING
●Care should be taken to prevent injury if anyone in the following categories
comes in contact with the steering wheel and seats when the heater is on:
• Babies, small children, the elderly, the sick and the physically chal-
lenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sleeping drugs, cold remedies, etc.)
● Observe the following precautions to prevent minor burns or overheating:
• Do not cover the seat with a blanket or cushion when using the seat
heater.
• Do not use seat heater more than necessary.
NOTICE
● 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 battery discharge, do not use the functions when the engine is
not running.