TOYOTA PRIUS PRIME 2021 Owners Manual (in English)

PRIUS PRIME_OM_OM47D71U_(U)
5316-1. Using the air conditioning system and defogger
6
Interior features
■Windshield fog detection function
When automatic mode is set, the humidity sensor (P. 534) detects fog on
the windshield and controls the air conditioning system to prevent 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 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. 430)
■When the outside temperature falls to nearly 32F (0C)
The dehumidification function may not operate even when is
selected.
■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 power switch
is turned to ON mode.
●It is possible to switch to outside air mode at any time by pressing
.

5326-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47D71U_(U)■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
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440055004e004800470011[
●To reduce potential odors from occurring, 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. 640
■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

PRIUS PRIME_OM_OM47D71U_(U)
5336-1. Using the air conditioning system and defogger
6
Interior features
■Customization
Settings (e.g. A/C auto switching operation) can be changed. (Customizable
features: P. 753)
WARNING
■To prevent the windshield from fogging up
●Do not use during cool air operation in extremely humid weather. T h e
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 surfaces 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.

5346-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47D71U_(U)
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.
■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, 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. 531)
Follow these points to avoid damaging
the sensor:
●Do not disassemble the sensor

535
PRIUS PRIME_OM_OM47D71U_(U)
6-1. Using the air conditioning system and defogger
6
Interior features
Remote Air Conditioning System
If the Remote Air Conditioning System is used while the charging
cable is connected to the vehicle, the reduction of charge in the hybrid
battery (traction battery) will be suppressed to allow you to use elec-
tricity from an external power source.
Charging will be conducted automatically after the Remote Air Condition-
ing System is stopped.
Check the temperature setting of the air conditioning system.
(P. 512, 525)
The Remote Air Conditioning System will operate in accordance with the
temperature settings of the air conditioning system.
Press and hold “A/C” on the wire-
less remote control to operate the
Remote Air Conditioning System.
The system will shut off if a door is
opened.
The system can be stopped by
pressing “A/C” twice.
The Remote Air Conditioning System uses electrical energy
stored in the hybrid battery (traction battery) and allows the air
conditioning to be operated by remote control.
Before leaving the vehicle
Activating the Remote Air Conditioning System

5366-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47D71U_(U)
■Operating conditions
<0037004b004800030056005c00560057004800500003005a004c004f004f000300520051004f005c000300520053004800550044005700480003004c004900030044004f004f00030052004900030057004b0048000300490052004f004f0052005a004c00
51004a00030046005200510047004c0057004c005200510056[ are met:
●The shift position is in P.
●The power switch is off.
*
●All doors are closed.
●The hood is closed.
*: The Remote Air Conditioning System cannot be used for approximately 3
minutes and a half after the power switch is turned off.
■Remote Air Conditioning System automatic shut-off
The system will automatically shut off under the following conditions:
●About 10 minutes have passed since operation began
●Any one of the operating conditions is not met
The system may also shut off if the charge level of the hybrid battery (traction
battery) drops to low.
■Conditions affecting operation
The system may not start in the following situations:
●The charge level of the hybrid battery (traction battery) is low
●The outside temperature is extremely low
●When the hybrid system is cool (for example, after being left for a long time
in low temperatures)
■Windshield defogger
When defogging the windshield using the Remote Air Conditioning System,
defogging may be insufficient due to the power being restricted more than
during normal air conditioning operation. Also, the outside of the windshield
may fog up due to the outside temperature, humidity or air conditioning set
temperature.
■Using the heater via the Remote Air Conditioning System
When the outside heat exchanger becomes frosted over, heating perfor-
mance may decline due to automatically switching to the frost removal opera-
tion.

PRIUS PRIME_OM_OM47D71U_(U)
5376-1. Using the air conditioning system and defogger
6
Interior features
■Security feature
Any unlocked doors will be automatically locked when the system is operat-
ing. The buzzer sounds and the emergency flashers flash to indicate that the
doors have been locked or the system has been turned off.
(The doors locked: Once; The system turned off: Twice)
■Conditions affecting operation
P. 295
■When using the Remote Air Conditioning System
A charging message will be displayed on the multi-information display. Differ-
ent messages will be displayed depending on when the Remote Air Condi-
tioning System was started (after charging or during charging).
■While the Remote Air Conditioning System is operating
●Depending on the operating condition of the Remote Air Conditioning Sys-
tem, the electric fan may spin and an operating noise may be heard. How-
ever, this does not indicate a malfunction.
●The Remote Air Conditioning System may stop operating temporarily if
other features that use electricity (for example, the seat heater, lights, wind-
shield wipers) are in operation or if the charge level of the 12-volt battery
becomes low.
●The headlights, windshield wiper, combination meter, etc. will not operate
while the Remote Air Conditioning System is operating.
■Electronic key battery depletion
P. 278
■When the electronic key battery is fully depleted
P. 647
■Customization
Setting (e.g. Operation using “A/C” on the wireless remote control) can be
changed. (Customizable features: P. 753)

5386-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47D71U_(U)
WARNING
■Precautions for the Remote Air Conditioning System
●Do not use the system if people are in the vehicle.
Even when the system is in use, the internal temperature may still reach a
high or low level due to features such as the automatic shut-off. Children
and pets left inside the vehicle may suffer heatstroke dehydration or hypo-
thermia or could result in death or serious injury.
●Depending on the surrounding environment, signals from the wireless
switch may transmit further than expected. Pay appropriate attention to
the vehicle’s surroundings and use the switch only when necessary.
●Do not operate “A/C” if the hood is open. The air conditioning may operate
unintentionally and objects may be drawn into the electrical cooling fan.
NOTICE
■To prevent the hybrid battery (traction battery) from being discharged
through incorrect operation
Use “A/C” only when necessary.

539
PRIUS PRIME_OM_OM47D71U_(U)
6-1. Using the air conditioning system and defogger
6
Interior features
Heated steering wheel/seat heaters
: If equipped
●Heated steering wheel
Warm up the grip of the steering wheel
●Seat heaters (front seats)
Warm up the seat upholstery
WARNING
●Care should be taken to prevent injury if anyone in the following categories
<004600520050004800560003004c0051000300460052005100570044004600570003005a004c0057004b00030057004b0048000300560057004800480055004c0051004a0003005a004b00480048004f000300440051004700030056004800440057005600
03005a004b0048005100030057004b00480003004b00480044[ter 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.)
●<003200450056004800550059004800030057004b0048000300490052004f004f0052005a004c0051004a00030053005500480046004400580057004c0052005100560003005700520003005300550048005900480051005700030050004c00510052005500
03004500580055005100560003005200550003005200590048[rheating:
• 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.

5406-1. Using the air conditioning system and defogger
PRIUS PRIME_OM_OM47D71U_(U)
Turns the heated steering wheel
on/off
The indicator in the instrument
cluster comes on when the heated
steering wheel is operating.
●The heated steering wheel can be used when the power switch is in ON
mode.
●The heated steering wheel will automatically turn off after about 30 minutes.
Heats the seat at low tempera-
ture (LO)
Heats the seat at high tempera-
ture (HI)
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.
Heated steering wheel (if equipped)
Seat heaters
indicator indicator
1
2