2021 TOYOTA TUNDRA air conditioning

3495-1. Using the air conditioning system
5
Interior features
■Switching between outside air and recirculated air modes
Press .
The mode switches between outside air mode (introduces air from
outside the vehicle) (indicator off) and recirculated air mode (recy-
cles air inside the vehicle) (in dicator on) each time the butto n is
pressed.
■Defogging the windshield
Defoggers are used to defog the windshield and front side win-
dows.
Press .
Set the outside/recirculated air mode button to outside air mod e if the recir-
culated air mode is used. (It may switch automatically.) To def og the wind-
shield and the side windows early, turn the air flow and temper ature up.
To return to the previous mode, press again when the windshield is
defogged.
■
Defogging the back wi ndow (CrewMax models)
Defogger is used to defog the back window.
Press .
The defogger will automatically turn off after approximately 15 minutes.
■
Defogging the outside rear v iew mirrors (if equipped)
Defogger is used to defog to remove raindrops, dew and frost fr om
the outside rear view mirrors.
Press or .
The defogger will automatically turn off after approximately 15 minutes.
CrewMax models: Turning the back window defogger on will turn t he out-
side rear view mirror defoggers on.
Other functions

3505-1. Using the air conditioning system
■Windshield wiper de -icer (if equipped)
This feature is used to prevent ice from building up on the win d-
shield and wiper blades.
Press or .
The defogger will automatically turn off after approximately 15 minutes.
Double Cab models: Turning the outside rear view mirror defogge rs on will
turn the windshield wiper de-icer on.
CrewMax models: Turning the back window defogger on will turn t he wind-
shield wiper de-icer on.
■
Location of a ir outlets
Air outlets and air volume
changes according to the
selected airflow mode.
*: CrewMax models
■
Adjusting the position of and opening and closing the air out-
lets
Front
Direct air flow to the left or right,
up or down.
Air outlets
*

3515-1. Using the air conditioning system
5
Interior features
Open the vent
Close the vent
Rear (CrewMax models)
Direct air flow to the left or right,
up or down.
Turn the knob to open or close
the vent.
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3525-1. Using the air conditioning system
■Using automatic mode
Fan speed is adjusted automatically according to the temperatur e setting and
the ambient conditions.
Therefore, the fan may stop for a while until warm or cool air is ready to flow
immediately after is pressed.
■ Fogging up of the windows
●The windows will easily fog up when the humidity in the vehicle is high.
Turning on will dehumidify the air from the outlets and defog the
windshield effectively.
● If you turn 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 vehi-
cle after closing the windows, it is recommended that the air i ntake 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 recommended in prevent-
ing 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 dependin g on the
temperature setting or the inside temperature.
■ When the outside temperature exceeds 75°F (24°C) and the air co ndition-
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 en gine switch
is in ON.
● It is possible to switch to outside air mode at any time by pre ssing .
■ When the outside tempera ture falls to nearly 32F (0 C)
The dehumidification function may not operate even when is selected.

3535-1. Using the air conditioning system
5
Interior features
■Ventilation and air conditioning odors
●To let fresh air in, set the air conditioning system to the out side air mode.
● During use, various odors from inside and outside the vehicle m ay enter into
and accumulate in the air conditioning system. This may then ca use odor to
be emitted from the vents.
● To reduce potential odors from occurring:
• It is recommended that the air conditioning system be set to o utside air
mode prior to turning the vehicle off.
• The start timing of the blower may be delayed for a short peri od of time
immediately after the air conditioning system is started in aut omatic
mode.
■ Air conditioning filter
P. 448
WARNING
■To prevent the windshield from fogging up
● Do not use
during cool air operation in extremely humid weather.
The difference between the temperature of the outside air and t hat of the
windshield can cause the outer surface of the windshield to fog up, block-
ing your vision.
■ To prevent burns (vehicles with rear view mirror defoggers and wind-
shield wiper de-icer)
● Do not touch the rear view mirror surfaces when the outside rear view mir-
ror defoggers are on.
● Do not touch the glass at lower part of the windshield or to th e side of the
front pillars, when the windshield wiper de-icer is on.
NOTICE
■ To prevent battery discharge
Do not leave the air conditioning system on longer than necessa ry 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 to
defog.

3545-1. Using the air conditioning system
Seat heaters/seat ventilators
Turns the seat heater on
Hi
Mid
Lo
Off
The level indicator lights come on.
Press the “ ” on the button to up
and “ ” to down, and off.
■
Seat heater
Turns the seat heater on Hi
Mid
Lo
Off
The level indicator lights come on.
Pressing the button changes
modes in the following:
HiMid LoOff
: If equipped
The seat heaters and ventilator s heat the seats and maintain
good airflow by blowing air from the seats.
Seat heaters
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Seat ventilators
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3555-1. Using the air conditioning system
5
Interior features
■Seat ventilators
Blows air from the seat Hi
Mid
Lo
Off
The level indicator lights come on.
Pressing the button changes
modes in the following:
HiMid LoOff
■The seat heaters/seat ventilators can be used when
The engine switch is in ON.
■ Passenger seat ventilator timer (vehicles with seat ventilators )
● The ventilator operates on for 5 minutes after the button is pr essed.
● When the passenger is not detected, the automatically turns off the ventila-
tor after 5 minutes.
■ When not in use
Turn the seat heaters or seat ventilators off by pressing the b utton. The indi-
cator light turns off.
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WARNING
■ Burns
● Use caution when seating the following persons in a seat with t he seat
heater on to avoid the possibility of burns:
• Babies, small children, the elderly, the sick and the physical ly chal-
lenged
• Persons with sensitive skin
• Persons who are fatigued
• Persons who have taken alcohol or drugs that induce sleep (sle eping
drugs, cold remedies, etc.)
● Do not cover the seat with anything when using the seat heater.
Using the seat heater with a blanket or cushion increases the t emperature
of the seat and may lead to overheating.
● Do not use seat heater more than necessary. Doing so may cause minor
burns or overheating.

3565-1. Using the air conditioning system
NOTICE
■To prevent damage to the seat heaters/seat ventilators
Do not put heavy objects that have an uneven surface on the sea t and do
not stick sharp objects (needles, nails, etc.) into the seat.
■ To prevent battery discharge
Turn the seat heaters/seat ventilators off when the engine is n ot running.