TOYOTA PRIUS 2018 Owners Manual (in English)

PRIUS_OM_OM47B89U_(U)
5316-1. 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 position of the air outlets
Direct air flow to the left or right,
up or down.
■Opening and closing 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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5326-1. Using the air conditioning system and defogger
PRIUS_OM_OM47B89U_(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 is pressed.
■ Setting confirmation screen
■ S-FLOW mode operation
■ Changing from manual S-FLOW mode to automatic S-FLOW mode
Press to disable S-FLOW mode.
The indicator will go off.
Turn the power switch off.
After 60 minutes have elapsed, change the power switch to ON mode.
■ Changing settings using the multi-information display
The air conditioning system settings can be changed on the screen of
the multi-information display. ( →P. 134)
■ 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 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 selected, the S-FLOW
mode status is displayed on the multi-
information display.
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PRIUS_OM_OM47B89U_(U)
5336-1. Using the air conditioning system and defogger
6
Interior features
■Windshield fog detection function
When automatic mode is set, the humidity sensor ( →P. 535) detects fog on
the windshield and controls the air conditioning system to prevent fog.
■ 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 out-
side air from entering the vehicle interior. During cooling operation, setting
the recirculated 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.
■ Fresh air intake system while parking
When parking, the system automatically switches to outside air mode to
encourage better air circulation throughout the vehicle, helping to reduce
odors that occur when starting the vehicle.
■ Operation of the air conditioning system in the air conditioning eco
mode
●In the air conditioning eco mode, the air conditioning system is controlled as
follows to prioritize fuel efficiency:
• Engine speed and compressor operation controlled to restrict heating/
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 conditioning eco
mode will be turned on automatically. Even in this case, the air conditioning
eco mode can be turned off by selecting . ( →P. 324)
■ When the outside temperat ure falls to nearly 32°F (0°C)
The dehumidification function may not operate even when is
selected.
■ 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 may enter into
and accumulate in the air conditioning system. This may then cause 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 the blower may
be delayed for a short period of time i mmediately after the air conditioning
system is started in automatic mode.
■ Air conditioning filter
→P. 634

5346-1. Using the air conditioning system and defogger
PRIUS_OM_OM47B89U_(U)■
Customization
Settings (e.g. A/C auto switching operation) can be changed. (Customizable
features: →P. 770)
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 wind-
shield can cause the outer surface of the windshield to fog up, blocking
your vision.
■ To prevent burns
Do not touch the rear view mirror surf aces when the outside rear 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_OM_OM47B89U_(U)
5356-1. 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 necessary when the
hybrid system is off.
■ Air outlets
The air outlets become hot when used for heating. Therefore, use 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. 533)
Follow these points to avoid damaging
the sensor:
● Do not disassemble the sensor

536
PRIUS_OM_OM47B89U_(U)
6-1. Using the air conditioning system and defogger
Seat heaters∗
∗: If equipped
Seat heaters heat the front seats.
WARNING
●Care should be taken to prevent injury if anyone in the following categories
comes in contact with the 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 12-volt battery discharge, do not use the functions when the
hybrid system is off.

PRIUS_OM_OM47B89U_(U)
5376-1. Using the air conditioning system and defogger
6
Interior features
Heats the seat at high tempera-
ture (HI)
Heats the seat at low tempera-
ture (LO)
The indicator light comes on when
one side of the switch is pressed.
To stop the operation, gently press
the other side of the switch.
●The seat heaters can be used when the power switch is in ON mode.
● When not in use, turn off the switch. The indicator light goes off.
● Passenger side operation indicator:
Operating instructions
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Illuminates while the passenger side
seat heater is operating, allowing the
operating condition of the passenger
side seat heater to be checked from the
driver side as well.

538
PRIUS_OM_OM47B89U_(U)
6-2. Using the interior lights
Interior lights list
Front personal/interior lights ( →P. 539)
Shift lever lighting
Rear interior light ( →P. 540)
Front door courtesy lights
Footwell lights (if equipped)1
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5

PRIUS_OM_OM47B89U_(U)
5396-2. Using the interior lights
6
Interior features
Front interior light
Vehicles without moon roofVehicles with moon roof
Turns the lights off
Turns the door position on
Turns the lights on Turns the door position on/off
Turns the lights on/off
Front personal lights
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Vehicles without moon roofVehicles with moon roof
Turns the lights on/off Turns the lights on/off

540
PRIUS_OM_OM47B89U_(U)
6-2. Using the interior lights
Turns the switch to the door
position (door linked)
Operation is linked with the front
interior light main switch. When the
switch is off, the light does not illu-
minate.
Turns the light on
●Illuminated entry system: The lights automatically turn on/off according to
power switch mode, the presence of the electronic key, whether the doors
are locked/unlocked, and whether the doors are opened/closed.
● If the interior lights remain on when the power switch is turned off, the light
will go off automatically after 20 minutes.
● Settings (e.g. the time elapsed before the lights turn off) can be changed.
(Customizable features: →P. 770)
Rear interior light
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NOTICE
To prevent 12-volt battery discharge, do not leave the lights on longer than
necessary when the hybrid system is off.