heating TOYOTA PRIUS PRIME 2023 User Guide

2665-2. Driving procedures
Turn the brake hold system on
The brake hold standby indicator
(green) comes on. While the
system is holding the brake, the
brake hold operated indicator (yel-
low) comes on.
■Brake hold system operating
conditions
The brake hold system cannot be
turned on in the following condi-
tions:
●The driver’s door is not closed.
●The driver is not wearing the seat
belt.
NOTICE
■When parking the vehicle
Before you leave the vehicle, shift
the shift position to P, set the
parking brake and make sure that
the vehicle does not move.
■When the system malfunc-
tions
Stop the vehicle in a safe place
and check the warning messages.
■When the vehicle 12-volt bat-
tery is discharged
The parking brake system cannot
be activated. ( P.589)
■When the parking brake can-
not be released due to a mal-
function
Driving the vehicle with the park-
ing brake set will lead to brake
components overheating, which
may affect braking performance
and increase brake wear. Have
the vehicle inspected by your
Toyota dealer immediately if this
occurs.
Brake Hold
The brake hold system
keeps the brake applied
when the shift position is in
D or N with the system on
and the brake pedal has
been depressed to stop the
vehicle. The system
releases the brake when the
accelerator pedal is
depressed with the shift
position in D to allow
smooth start off.
Enabling the system
A
B

4225-5. Using the driving support systems
around your vehicle and exit from
the parking space manually.
■If “Cannot control speed” is
displayed
The system judged that it cannot
adjust the speed of the vehicle when
using the system in an area with a
slope or step and assistance was
canceled.
Use the system in a level location.
■If “Obstacle detected” is dis-
played
As a moving object or stationary
object that may collide with your
vehicle has been detected, the
hybrid system output control/braking
control operates to suspend
Advanced Park assistance.
Check the condition of the surround-
ing area. To resume assistance,
select the “Start” button on the Multi-
media Display.
■If “No available parking space
to register” is displayed
This message is displayed when
is selected at a parking space that
cannot be detected.
Operate the system at a parking
space where differences in the road
surface can be recognized.
(  P.414)
Operate the driving mode select
switch forward or backward to
select the desired driving mode.
Indicator
Driving mode select switch
1 Normal mode
Provides an optimal balance of fuel
economy, quietness, and dynamic
performance. Suitable for normal
driving.
2Eco drive mode
Helps the driver accelerate in an
eco-friendly manner and improve
fuel economy through moderate
throttle characteristics and by con-
trolling the operation of the air con-
ditioning system (heating/cooling).
Driving mode select
switch
The driving modes can be
selected to suit the driving
and usage conditions.
Selecting a driving mode
A
B

4235-5. Using the driving support systems
5
Driving
When Eco drive mode is selected,
Eco drive mode indicator comes
on.
3Sport mode
Controls the hybrid system to pro-
vide quick, powerful acceleration.
This mode also expands the possi-
ble rate of deceleration by operat-
ing the accelerator pedal and
enables acceleration/deceleration
control based on the driver’s inten-
tions. This changes the steering
feel, making it suitable for when
agile driving response is desired,
such as when driving on roads with
many curves.
When Sport mode is selected,
Sport mode indicator comes on.
4Custom mode
Allows you to drive with the power
train, steering wheel and air condi-
tioning system func tions set to your
preferred settings.
Custom mode settings can only be
changed on the drive mode cus-
tomization display of Multimedia
Display. ( P.632)
When the Custom mode is
selected, Custom mode indicator
comes on.
■Operation of the air condition-
ing system in Eco drive mode
When Eco drive mode is selected,
the air conditioning system will auto-
matically be changed to eco air con-
ditioning mode.
Eco air conditioning mode controls
the heating/cooling operations and
fan speed of the air conditioning
system to enhance fuel efficiency.
To improve air conditioning perfor-
mance, perform the following opera-
tions:
●Adjust the fan speed ( P.435)
●Deactivate Eco drive mode
●Turn off eco air conditioning mode
( P.440)
■Automatic deactivation of a
driving mode
●Sport mode and Custom mode
are automatically deactivated and
the driving mode returns to normal
mode when the power switch is
turned to OFF.
●Normal mode and Eco drive mode
are not deactivated until another
driving mode is selected. (Even if
the power switch is turned to OFF,
normal mode and Eco drive mode
will not be automatically deacti-
vated.)
■Customization
The custom mode can be changed.
(Customizable features: P.618)

4265-5. Using the driving support systems
●The accelerator pedal is not
depressed
●The parking brake is not engaged
●The power switch is in ON
■Automatic system cancelation
of hill-start assist control
The hill-start assist control will turn
off in any of the following situations:
●Shift the shift position to P or N.
●The accelerator pedal is
depressed
●The brake pedal is depressed and
the parking brake is engaged
●A maximum of 2 seconds have
elapsed after the brake pedal is
released
●The power switch is turned to OFF
■Sounds and vibrations caused
by the ABS, brake assist, VSC,
TRAC and hill-start assist con-
trol systems
●A sound may be heard from the
engine compartment when the
brake pedal is depressed repeat-
edly, when the hybrid system is
started or just after the vehicle
begins to move. This sound does
not indicate that a malfunction has
occurred in any of these systems.
●Any of the following conditions
may occur when the above sys-
tems are operating. None of these
indicates that a malfunction has
occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard also
after the vehicle comes to a stop.
■ECB operating sound
ECB operating sound may be heard
in the following cases, but it does
not indicate that a malfunction has
occurred.
●Operating sound heard from the
engine compartment when the
brake pedal is operated.
●Operating sound heard from the engine compartment when one or
two minutes passed after the stop
of the hybrid system.
■Active Cornering Assist opera-
tion sounds and vibrations
When the Active Cornering Assist is
operated, operation sounds and
vibrations may be generated from
the brake system, but this is not a
malfunction.
■Automatic reactivation of TRAC
and VSC systems
After turning the TRAC and VSC
systems off, the systems will be
automatically re-enabled in the fol-
lowing situations:
●When the power switch is turned
off
●If only the TRAC system is turned
off, the TRAC will turn on when
vehicle speed increases
If both the TRAC and VSC sys-
tems are turned off, automatic re-
enabling will not occur when vehi-
cle speed increases.
■Operating conditions of Active
Cornering Assist
The system operates when the fol-
lowing occurs.
●TRAC/VSC can operate
●The driver is attempting to accel-
erate while turning
●The system detects that the vehi-
cle is drifting to the outer side
●The brake pedal is released
■Reduced effectiveness of the
EPS system
The effectivenes s of the EPS sys-
tem is reduced to prevent the sys-
tem from overheating when there is
frequent steering input over an
extended period of time. The steer-
ing wheel may feel heavy as a
result. Should this occur, refrain
from excessive steering input or
stop the vehicle and turn the hybrid
system off. The EPS system should
return to normal within 10 minutes.

4366-1. Using the air conditioning system and defogger
switch.
■Defogging the rear window
(if equipped)
A defogger is used to defog the
rear window.
Press the rear window defogger
switch.
When the rear window defogger
switch is on, the indicator illumi-
nates on the rear window defogger
switch.
The defogger will automatically turn
off after 15 minutes.
■Defogging the rear window
and outside rear view mir-
rors (if equipped)
Defoggers are used to defog the
rear window and to remove rain-
drops, dew and frost from the
outside rear view mirrors.
Press the rear window and out-
side rear view mirror defoggers
switch.
When the rear window and outside
rear view mirror defoggers switch is
on, the indicator illuminates on the
rear window and outside rear view
mirror defoggers switch.
The defoggers will automatically
turn off after 15 minutes.
■When the outside temperature
exceeds 75°F (24°C) and the air
conditioning system is on
●In order to reduce the air condi-
tioning power consumption, the air
conditioning system may switch to
recirculated air mode automati-
cally.
This may also reduce fuel con-
sumption.
●Recirculated air mode is selected
as a default mode when the power
switch is turned to ON.
●It is possible to switch to outside
air mode at any time by pressing
the outside air mode switch.
■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
conventional vehicles, heating
may be less effective and warm
air may not come out.
• When the outside heat exchanger
is frosted over, fan speed declines
and it may become harder to heat
the interior. 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.
• When “AUTO” switch is turned on, the heating is controlled opti-
mally. Therefore, the set heating
performance may not be achieved
even if the fan speed setting is
increased.
Outside heat exchanger
●In the following situations the gas-
oline engine may operate in order
to extract heat from the engine
coolant via the heater even in EV
mode.
• The outside temperature is approximately 75°F (24°C) or low
• Windshield defogger is operating
A

4376-1. Using the air conditioning system and defogger
6
Interior features
■Water droplets during air condi-
tioning operation
The outside heat exchanger, accu-
mulator and air conditioning piping
may incur condensation or frost may
form.
During or after the air conditioning
operation, water droplets may fall
from the vehicle. Ho wever, it is not a
malfunction.
Accumulator
Outside heat exchanger
■Fogging up of the windows
●The windows will easily fog up
when the humidity in the vehicle is
high. Turning “A/C” switch on will
dehumidify the air from the outlets
and defog the windshield effec-
tively.
●If you turn “A/C” switch off, the
windows may fog up more easily.
●The windows may fog up if the
recirculated air mode is used.
■While using “My Room Mode”
●It may not be possible to obtain
the intended defogging perfor-
mance even if the windshield
defogger switch is pressed. If the
windows need to be defogged
before driving, stop charging
power and then press the wind-
shield defogger switch.
●When the outside temperature is
low, heating may feel insufficient
due to restricted operation of the
air conditioning.
Heating cannot be performed
when it is approximately 14°F (-
10°C) or less as the gasoline engine cannot be started during
“My Room Mode”. If heating is
desired, stop charging and
remove the AC charging cable
from the vehicle.
■When driving on dusty roads
Close all windows. If dust thrown up
by the vehicle is still drawn into the
vehicle 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 recom-
mended in preventing 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.
■When the outside temperature
falls to nearly 32°F (0°C)
The dehumidification function may
not operate even when “A/C” switch
is pressed.
■Operation of the air condition-
ing system in the eco air condi-
tioning mode
●In the eco air conditioning mode,
the air conditioning system is con-
trolled as follows to prioritize fuel
efficiency:
• Engine speed and compressor
operation controlled to restrict
heating/cooling capacity
• Fan speed restricted when auto-
matic mode is selected
●The eco air conditioning mode can
be turned on and off using the
option screen of the air condition-
ing control screen. ( P.440)
●When the driving mode is
changed to Eco drive mode, the
eco air conditioning mode is
A
B

4446-1. Using the air conditioning system and defogger
The level indicators come on
yellow during operation.
Each time the switch is pressed,
the operation condition changes as
follows.
Hi (3 segments lit)  Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
■Outboard rear seats (if
equipped)
Press the switch to turn the seat
heater on/off.
The indicator on the switch illumi-
nates during operation.
■Operation condition
The power switch is in ON.
Press the switch to turn the seat
ventilator on/off.
The level indicators come on
green during operation.
Each time the switch is pressed,
the operation condition changes as
follows.
Hi (3 segments lit)  Mid (2 seg-
ments lit)  Lo (1 segment lit) 
Off
■Operation condition
The power switch is in ON.
■Air conditioning system-linked
control mode
When a seat ventilator is set to Hi,
the fan speed of the seat ventilator
AWARNING
■To prevent causes of over-
heating and minor burn inju-
ries
Observe the following precautions
when using a seat heater:
●Do not cover the seat with a
blanket or cushion when using
the seat heater.
●Do not use seat heater more
than necessary.
Operating the seat venti-
lators
A

4626-4. Using the other interior features
■The wireless charger can be
operated when
The power switch is in ACC or ON.
■Usable smartphones
●Qi standard wireless charge stan-
dard can be used on compatible
devices. However, not all Qi stan- dard devices and compatibility are
guaranteed.
●This product is designed for use
with smartphones with a power
supply of 5 W or less.
●However, charging exceeding 5 W
is supported by the following
smartphones.
• Charging at 7.5 W or less is sup-
Orange (Repeatedly flashes 3 times
continuously)
Foreign substance detection:
The abnormal heating prevention
function for foreign substances
operated due to the presence of a
metallic foreign substance in the
charge area
 Remove the foreign substance
from the charge area.
Smartphone misaligned:
The abnormal heating prevention
function for foreign substances
operated due to the charging coil
in the smartphone moving outside
of the charge area
Remove the smartphone from
the wireless charger, check that
the operation indicator light
changes back to green, and then
place the smartphone so that it
is near the center of the wireless
charger. Also, if a case or cover
is installed to the smartphone,
remove it. Also refer to “Situa-
tions in which the function may
not operate normally”. ( P.463)
Orange (Repeatedly flashes 4 times
continuously)
Safety shutdown resulting when
the temperature within the wireless
charger exceeded the set value
Remove the smartphone from
the charging area and start
charging after waiting for the
operation indicator light to
changes back to green.
Operation indicator lightSuspected causes/Handling method

4646-4. Using the other interior features
placed outside the charge area
●The vehicle is in an area where
strong electrical waves or noise
are emitted, such as near a televi-
sion tower, power plant, gasoline
station, broadcasting station, large
display, airport, etc.
●The electronic key is not inside the
vehicle
●Any of the following objects that is
0.08 in. (2 mm) or thicker is stuck
or installed between the charging
side of the smartphone and the
charge area.
• Thick cases or covers
• A case or cover attached with an
uneven or tilted surface, so that
the charging side is not flat
• Thick decorations
• Accessories, such as finger rings, straps, etc.
●When there is a gap between the
charging side of the smartphone
and the charge area due to a pro-
trusion such as a camera on the
charging side of the smartphone.
●When the smartphone is in con-
tact with, or is covered by any of
the following metallic objects:
• A card that has metal on it, such as aluminum foil, etc.
• A pack of cigarettes that includes aluminum foil
• A wallet or bag that is made of
metal
• Coins
• A heating pad
• CDs, DVDs or other media
• A metal accessory
• A case or cover made of metal
• A flip type case with a magnet on the charging side of the smart-
phone
●Electric wave type wireless
remote controls are being used
nearby
●2 or more smartphones are placed
on the wireless charger at the
same time
●When using a smartphone model
with an internal charging coil that is not located near the center of
the smartphone
If charging is abnormal or the opera-
tion indicator light continues to flash
for any other reason, the wireless
charger may be malfunctioning.
Contact your Toyota dealer.
■If the smartphone OS has been
updated
If the smartphone OS has been
updated to a newer version, its
charging specifications may have
changed significantly. For details,
check the information on the manu-
facturer’s website.
■Trademark information
iPhone is a trademark of Apple Inc.,
registered in the U.S. and other
countries.
WARNING
■Caution while driving
When charging a smartphone, for
safety reasons, the driver should
not operate the main part of the
smartphone while driving.
■Caution regarding interfer-
ence with electronic devices
People with implantable cardiac
pacemakers, cardiac resynchroni-
zation therapy-pacemakers or
implantable cardio verters, as well
as any other electrical medical
device, should consult their physi-
cian about the usage of the wire-
less charger.
■To prevent malfunctions or
burns
Observe the following precau-
tions. Failure to do so may result
in a equipment failure and dam-
age, catch fire, burns due to over-
heat or electric shock.
●This product is specialized for
use with smartphones and can-
not charge other devices.

5568-2. Steps to take in an emergency
■High coolant temperature warning light (warning buzzer)
■Low engine oil pressure warning light* (warning buzzer)
*: This light illuminates on the multi-information display with a message.
■Hybrid system overheat warning light* (warning buzzer)
*: This light illuminates on the multi- information display with a message.
■Malfunction indicator lamp
Warning lightDetails/Actions
Indicates that the engine is overheating
Immediately stop the vehicle in a safe
place.
Handling method ( P.594)
Warning lightDetails/Actions
Indicates that the engine oil pressure is too low
 Immediately stop the vehicle in a safe
place and contact your Toyota dealer.
( P.506)
Warning lightDetails/Actions
Indicates that the hybrid system has overheated
 Stop the vehicle in a safe place. Handling
method ( P.595)
Warning lightDetails/Actions
(U.S.A.)
(Canada)
Indicates a malfunction in:
 The hybrid system;
 The electronic engine control system;
 The electronic throttle control system; or
 The emission control system (if equipped)
 Have the vehicle inspected by your Toyota
dealer immediately.