TOYOTA PRIUS PRIME 2022 Owners Manual

PRIUS PRIME_OM_OM47E74U_(U)
5116-1. Using the air conditioning system and defogger
6
Interior features
■Switching between outside air and recirculated air modes
Press .
The mode switches between outside air mode and recirculated air mode
each time is pressed.
The indicator illuminates when the recirculated air mode is
selected.
■
Air conditioning eco mode
The air conditioning system is c ontrolled with low fuel consumption
prioritized such as re ducing fan speed, etc.
Press .
The air conditioning eco mode switches between on and off each time
is pressed.
“ECO” is displayed on the air conditioning screen when the air condi-
tioning eco mode is on.
■
Defogging the windshield
Defoggers are used to defog the windshield and front side win-
dows.
Press .
Set to outside air mode if the recirculated air mode is used. (It
may switch automatically.)
To defog the windshield and the side windows early, turn the ai r flow and
temperature up.
The indicator illuminates when the defoggers are on.
To return to the previous mode, press again when the wind-
shield is defogged. Also, turning the power switch off during o peration
can return to the previous mode.
Other functions

5126-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47E74U_(U)■
Defogging the rear window and
outside rear view mirrors
Defoggers are used to defog the rear window and to remove rain-
drops, dew and frost from the outside rear view mirrors.
Press .
Defoggers switch between on and off each time is pressed.
The indicator illuminates when defoggers are on.
The defoggers will automatically turn off after a period of tim e.
■
Eco score (A/C score)
 P. 2 2 9

PRIUS PRIME_OM_OM47E74U_(U)
5136-1. Using the air conditioning system and defogger
6
Interior features
■Location of air outlets
The air outlets and air volume
change according to the
selected airflow mode.
■Adjusting the air flow direction
Direct air flow to the left or right,
up or down.
■Opening and closi ng the air outlets
Air outlets
Left side outlet/right side outletCenter outlets
Open the vent
Close the vent Open the vent
Close the vent
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5146-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47E74U_(U)
■Heating
●In HV mode, the gasoline engine may operate in order to extract heat from
the engine coolant via the heater.
● In EV mode, heating is done by a heat pump system.
• When the outside temperature is low or it is snowing, compared to con-
ventional vehicles, heating may be less effective and warm air may not
come out.
• If frost has formed on the outside heat exchanger, the heating perfor-
mance will decline. The frost can be removed from the outside heat
exchanger by operating the Remote Air Conditioning System befor e driv-
ing ( P. 531). When frosted over, the heating operation of the Remote
Air Conditioning System starts after defrosting.
• When is turned on, the heating is controlled optimally. Therefore, the set heating performance may not be achieved even if the fan speed
setting is increased.
● In the following situations the gasoline engine may operate in order to
extract heat from the engine coolant via the heater even in EV mode.
• The outside temperature is approximately 14°F (-10°C) or low
• is operating
■ 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.
■ Water droplets during air conditioning operation• When the outside heat exchanger is
frosted over, fan speed declines and it
may become harder to heat the inte-
rior. However, it is not a malfunction.
In this situation, the air temperature
from the outlets may not change even
though the set temperature is raised.
The outside heat exchanger, accumulator
and air conditioning piping may incur con-
densation or frost may form. During or
after the air conditioning operation, water
droplets may fall from the vehicle. How-
ever, it is not a malfunction.
Outside heat exchanger
Outside heat exchanger
Accumulator

PRIUS PRIME_OM_OM47E74U_(U)
5156-1. Using the air conditioning system and defogger
6
Interior features
■Setting confirmation screen
■ Operation of automatic airflow control
●In order to maintain a comfortable interior, airflow may be directed to seats
without passengers immediately after the hybrid system is start ed and at
other times depending on the outside temperature.
● After the hybrid system is started, if passengers move around i nside or
enter/exit the vehicle, the system cannot accurately detect the presence of
passengers and automatic airflow control will not operate.
■ Operation of manual airflow control
Even if the function is manually switched to directing airflow to only the front
seats, when a rear seat is occupied, it may automatically direc t airflow to all
seats.
■ To return to automatic airflow control
With the indicator off, turn the power switch off.
After 60 minutes or more elapse, turn the power switch to ON.
■ Front seat concentrated airfl ow mode (S-FLOW) operation
■ Changing settings using the multi-information display
The air conditioning system settings can be changed on the scr een of
the multi-information display. ( P. 241)
When changing the settings of the air
conditioning system, the setting confirma-
tion screen is shown as a pop-up on the
multi-information display.
Press of the meter control switches to
go back to the previous screen.
When is pressed, the front seat
concentrated airflow mode (S-FLOW) sta-
tus is displayed on the multi-information
display.
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5166-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47E74U_(U)■
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.
■ Windshield fog detection function
When automatic mode is set, the humidity sensor (P. 519) detects fog on
the windshield and controls the air conditioning system to prev ent fog.
■ 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 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 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.
■ Fresh air intake system while parking
When parking, the system automatically switches to outside air mode to
encourage better air circulation throughout the vehicle, helpin g to reduce
odors that occur when starting the vehicle.
■ Operation of the air conditioning system in the air conditionin g eco
mode
● In the air conditioning eco mode, the air conditioning system i s controlled as
follows to prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict h eating/
cooling capacity
• Fan speed restricted when automatic mode is selected
● To improve air conditioning performance, perform the following operations:
• Adjust the fan speed
• Adjust the temperature setting
• Turn off the air conditioning eco mode
● When the driving mode is set to Eco driving mode, the air condi tioning eco
mode will be turned on automatically. Even in this case, the ai r conditioning
eco mode can be turned off by pressing . ( P. 425)
■ When the outside tempera ture falls to nearly 32F (0 C)
The dehumidification function may not operate even when is pressed.

PRIUS PRIME_OM_OM47E74U_(U)
5176-1. Using the air conditioning system and defogger
6
Interior features
■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 power switch
is turned to ON mode.
● It is possible to switch to outside air mode at any time by pre ssing
.
■Ventilation and air conditioning odors
●To let the fresh air in, set the air conditioning system to the outside 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.
● In order to suppress odors that occur when the air conditioning system
starts, fresh air is automatically taken in when parked.
● To reduce potential odors from occurring, the start timing of t he 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. 637
■ Air conditioning system refrigerant
●The meaning of each symbol on the label are as follows:
●
A label regarding the refrigerant of the
air conditioning system is attached to the
hood at the location shown in the follow-
ing illustration.
Caution
Air conditioning system
Air conditioning system lubricant type
Requires registered technician to service air conditioning
system
Flammable refrigerant

5186-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47E74U_(U)■
Customization
Settings (e.g. A/C auto switching operation) can be changed. (C ustomizable
features: P. 749)
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 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 rea r view mirror
defoggers are on.
● 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.

PRIUS PRIME_OM_OM47E74U_(U)
5196-1. Using the air conditioning system and defogger
6
Interior features
NOTICE
■Humidity sensor
● Do not spray the glass cleaner on the sensor or subject it to strong impacts
● Do not stick anything on the sensor
■ To prevent 12-volt battery discharge
Do not leave the air conditioning system on longer than necessa ry when the
hybrid system is off.
■ When repairing/replacing parts of the air conditioning system
Have repair/replacement performed by your Toyota dealer. When a part of
the air conditioning system, such as the evaporator, is to be replaced, it
must be replaced with a new one.
■ Air outlets
The air outlets become hot when used for heating. Therefore, us e caution
and adjust the air outlets accordingly.
In order to detect fog on the windshield, a
sensor which monitors the temperature
of the windshield, the surround humidity,
etc. is installed. ( P. 516)
Follow these points to avoid damaging
the sensor:
● Do not disassemble the sensor

520
PRIUS PRIME_OM_OM47E74U_(U)
6-1. Using the air conditioning system and defogger
Automatic air conditioning system (vehi-
cles with 11.6-inch display)
The following informations are displayed on the navigation syst em
screen.
Temperature setting
Fan speed setting
Automatic mode setting
Airflow mode setting
Front seat concentrated air-
flow mode (S-FLOW) setting
Air conditioning eco mode
setting
A/C setting
Outside/recirculated air mode setting
Air outlets and fan speed are automatically adjusted according
to the temperature setting.
Air conditioner information area
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