2022 TOYOTA BZ4X cooling

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2-1. Electric vehicle system
Electric Vehicle system
12-volt battery
Provides electricity to various vehicle systems such as the SRS airbags, headlights,
wipers, etc.
*: AWD models only
■When braking (regenerative
braking)
The battery electric motor (traction
motor) charges the traction battery.
The driving range can be extended
by actively using this regenerative
braking to store electricity in the
traction battery.
The battery electric vehicle is
driven using electricity, which is
received from an external power
source and stored in the traction
battery. Not only public charging
stations, but also household sock-
ets can be used for charging. Pro-
cedures are different from refueling
a conventional vehicle. Therefore,
make sure to read the following
thoroughly.
 Charging equipment (P.95)
 AC charging cable (P. 9 8 )
 Power sources that can be used
( P.112)
 Things to know before charging
( P.118)
 How to charge your vehicle
( P.121, 129)
 When charging cannot be per-
formed normally ( P.152)
■Regenerative braking
In the following situations, kinetic energy
is converted to electric energy and deceleration force can be obtained in conjunction with the recharging of the
traction battery.
●The accelerator pedal is released
while driving with the shift position in D.
●The brake pedal is depressed while driving with the shift position in D.
■Charging the 12-volt battery
The 12-volt battery is charged from the
traction battery when the EV system is operated or while the traction battery is being charged.
If the vehicle has not been used for a long time, the 12-volt battery may become low due to self-discharge. If this
occurs, follow the correct procedures. ( P.544)
■When not using the vehicle for an
extended period of time
●When the vehicle will not be used for
an extended period of time, charge the traction battery once a month. This protects the traction battery from
extreme voltage decline due to self discharging.
●When the vehicle will not be used for an extended period of time, the 12-volt battery will be charged from the
traction battery to reduce the risk of the 12-volt battery discharged. In this case, the cooling fan may operate,
however it is not a malfunction.
●To prevent the 12-volt battery from
being discharged, do not leave the charging port lid open or the charging cable connected to the vehicle.
Charging

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2-1. Electric vehicle system
■Charging the traction battery
Be sure to maintain the traction battery charge level suitable for your driving needs.
If the traction battery fully discharges, the vehicle cannot be driven at all. When the battery becomes low, charge it as
soon as possible.
■If the traction battery becomes low
●If the traction battery becomes low,
the traction battery charge warning light comes on or flashes and a mes-sage will be displayed on the multi-
information display. ( P.517)
●If the traction battery is completely
discharged, the EV system cannot be started and driving will not be possi-ble. When the traction battery
becomes low, charge it as soon as possible.
■Sounds and vibrations specific to an battery electric vehicle
Because there is no engine sound or vibration, it is easy to mistake the bat-tery electric vehicle for being off when it
is actually still running, as indicated by the “READY” indicator being illuminated. For safety, make sure to always shift the
shift position to P and apply the parking brake when parked.
Before and after the EV system is
started, the following sounds and vibra- tions may occur. However, these sounds and/or vibrations are not signs of mal-
functions:
●The brake system operation sound
may be heard from the front of the vehicle when the driver’s door is opened.
●Motor sounds may be heard from the motor compartment or luggage com-
partment.
●Electrical relay sounds may be heard
from the motor compartment when the EV system starts or stops.
●Relay operating sounds such as a snap or soft clank will be emitted from the traction battery in the following sit-
uations:
• When the EV system is started or stopped• When charging starts or completes
• When the vehicle is driven the first time after the traction battery has been charged using DC charging
●Sounds may be heard due to regener-ative braking when the brake pedal is
depressed or as the accelerator pedal is released.
●Cooling fan operating sounds from the radiator.
●The operation sound of the air condi-tioning system (air conditioning com-pressor, blower motor).
■Maintenance, repair, recycling, and
disposal
Contact any authorized Toyota retailer or Toyota authorized repairer, or any reli-
able repairer regarding maintenance, repair, recycling and disposal. Do not dispose of the vehicle yourself.
A sound which changes in accor-
dance with the driving speed, will
be played in order to warn people
nearby of the vehicle’s approach.
This sound may be heard inside the
vehicle. The sound will stop when
the vehicle speed exceeds approxi-
mately 25 km/h (15 mph).
■Acoustic Vehicle Alerting System
In the following cases, the Acoustic Vehicle Alerting System may be difficult
for surrounding people to hear.
●In very noisy areas
●In the wind or the rain
Also, as the Acoustic Vehicle Alerting
System is installed on the front of the
Acoustic Vehicle Alerting
System

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2-1. Electric vehicle system
The illustration is an example for explanation and may differ f rom the actual item.
Warning label
High voltage cables (orange)
ESU: Electricity Supply Unit (built in onboard traction battery char-
ger/DC-DC converter)
Service plug
AC charging inlet
Electric Vehicle system precautions
Be careful of the high voltage components (nominal voltage at 3 55.2
V), such as the traction battery , electricity supply unit, orange
colored high voltage cables, and electric motor, as well as hig h tem-
perature components such as the cooling radiator, which are pro -
vided on the battery electric vehicle. For the high voltage
components, warning labels are provided on them. Read them when
they need to be handled.
System components

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2-2. Charging
Electric Vehicle system
days and the traction battery heater
automatically stops. It automatically
insulates the traction battery in
extremely low temperatures.
 This control stops 31 days after
the charging cable is connected,
even if it is still connected to the
vehicle.
 When this control operates,
charging schedule settings are
ignored and charging starts
immediately.
■Traction battery cooler
When the traction battery is hot and
the AC charging cable is connected
to the vehicle, this function cools
the traction battery to protect it.
The function may operate when
continuously driving at high speeds
such as driving on highways or
freeways, or during DC charging.
■Using My Room Mode during DC charging
 P. 1 4 6
■Traction battery heater
●Traction battery heater may operate when charging is not being performed.
●When Traction battery heater is oper-ating, the charging indicator will illumi-
nate.
●When Traction battery heater is oper-
ating during charging, the charging may take longer than normal.
●The remaining charge of the traction battery declines when the traction bat-tery heater operates, it might be nec-
essary to recharge the traction battery again in order to supplement the remaining charge.
■Traction battery cooler
●For AC charging: Traction battery cooler settings can be changed on the
multi-information display. ( P.115)
●The charging indicator will illuminate
when the traction battery cooler is on standby or operating.
●When the charge level of the traction battery is low, the traction battery cooler may not operate, even if the
temperature of the traction battery is high.
●When the following conditions are met while the traction battery cooler is operating, the cooling operation will
stop. • The hood is opened• The power switch is turned to ACC or
ON. • The shift position is changed to any position other than P
• The Remote Air Conditioning System is operated ( P.427) • The remaining charge of the traction
battery drops below a certain amount
●The traction battery cooler operates
using power supplied by the traction battery and an external power source.• While the traction battery cooler is
operating, the charge of the traction battery will increase and decrease within a certain range, and will not
increase as during AC charging. • When the traction battery cooler oper-ates, charger will recognize it as the
battery being charged. If this function operates while a charger which charges a charging fee is connected
to the vehicle, AC charging fees will apply.
■Changing of the traction battery cooler setting
Setting can be changed on the
multi-information display.
Use the meter control switches
( P.176) and select “Vehicle Settings”, “Charging Settings”, “Battery Cooler”, and change the setting.

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2-2. Charging
WARNING
●When charging outdoors, make sure to connect to a rain-tight
socket for outdoor use. Ensure the rain-tight socket cover closes completely. If the rain-tight
socket cover cannot be closed, install a rain-tight socket cover that will close.
●In order to stop charging at the charging station, follow the instruc-
tions of the charger.
●If any heat, smoke, odors, noise or
other abnormalities are noticed during charging, stop charging immediately.
●Do not insert the plug if the socket is submerged in water or snow.
●When charging while it is raining or snowing, do not connect or discon-
nect the plug if your hands are wet. Also, do not get the plug or socket wet.
●Do not charge the vehicle during a lightning storm.
●Prevent the AC charging cable from being caught in the door or back
door.
●Do not let the wheels on the AC
charging cable, plug, charging con- nector and CCID (Charging Circuit Interrupting Device).
●Firmly insert the plug into the socket.
●Do not use an extension cord and converting adaptor.
●Close the hood before using the charging system.The cooling fan may start operating
suddenly. Touching or getting close to rotating parts such as the fan may cause your hands or clothes
(especially a necktie or scarf) to become caught and result in a seri-ous injury.
●After connecting the charging cable, confirm that it is not wound
around anything.
●If the power indicator on the CCID
(Charging Circuit Interrupting Device) does not illuminate after plugging the AC charging cable into
the socket, unplug it immediately.
■If the error warning indicator on
the CCID (Charging Circuit Inter- rupting Device) illuminates or flashes during charging
There may be an electrical leakage in the power source path, or there may be a malfunction in the AC charging
cable or CCID (Charging Circuit Inter- rupting Device).
Refer to P.102 and follow the correc-
tion procedure. If the error warning indicator does not turn off even after performing the correction procedure,
immediately stop charging, remove the AC charging cable and contact any authorized Toyota retailer or
Toyota authorized repairer, or any reli- able repairer. Continuing to charge the vehicle in that condition may lead
to unforeseen accidents or serious injury.
■Onboard traction battery charger
The onboard traction battery charger is located in the motor compartment.
Make sure to observe the following precautions regarding the onboard traction battery charger. Failure to
observe these precautions may result in death or serious injury such as burns and electric shocks.

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2-2. Charging
WARNING
■Warnings for DC charging
Be sure to observe the following when
using DC charging.
Failure to do so may cause an acci- dent that could lead to death or seri-
ous injury.
●Check that the DC charger and DC charging inlet are not damaged. If
there is any damage to the DC charging inlet, do not perform a DC charge and have it inspected imme-
diately at any authorized Toyota retailer or Toyota authorized repairer, or any reliable repairer.
●Do not touch the terminals of the DC charging connector or inlet with
metallic sharp tips (wires and nee- dles), or allow a short circuit to occur with foreign objects.
●Do not insert anything other than the DC charging connector into the
DC charging inlet.
●Check that the DC charging cable is
not coiled up or pinned underneath heavy objects.
●Be sure the DC charging inlet makes direct contact with the DC charging connector.
Do not connect conversion adapt- ers, extension cords, etc., between the DC charging connector and DC
charging inlet.
●When DC charging is interrupted,
follow the handling procedures of the DC charger. Immediately stop the DC charging when there is an
outbreak of heat, smoke, strange noises or smells, etc., during charging.
●Check that the DC charging con-nector and DC charging inlet do not have foreign objects or snow or ice
attached to it. If anything is attached to the inlet, be sure to completely remove the material
before connecting the DC charging connector.
●Do not charge the vehicle when there is a possibility of lightning. If you notice lightning while charging
the vehicle, do not touch the vehicle and the DC charging cable.
●Do not get the DC charging inlet terminals wet.
●Close the hood when using DC charging. The cooling fan may sud-denly start to run. Keep hands and
clothing (especially a tie, a scarf or a muffler) away from the fan. Fail-ure to do so may cause the hands
or clothing to be caught, resulting in serious injury.
■When connecting the DC charging connector
●Follow the handling procedures of
the DC charger to connect the DC charging connector. If the connector is not connected properly, the sys-
tem cannot recognize the connec- tion, and it may be possible to start the EV system.
After charging is completed, make sure to remove the DC charging con-
nector from the DC charging inlet before starting the EV system.
If the vehicle is started off with the
connector still connected, it could lead to an accident, possibly resulting in death or serious injury.
●Do not remove the DC charging connector from the DC charging
inlet during DC charging. After operating the DC charger to stop charging, remove the DC charging
connector from the DC charging inlet.

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6-1. Using the air conditioning system and defogger
Interior features
Fan speed control switch
Left-hand side temperature control switch
Rear window and outside rear view mirror defogger switch
Windshield defogger switch
■Adjusting the temperature set-
ting
Operate the temperature control
switch upwards to increase the
temperature and downwards to
decrease the temperature.
If “A/C” is not pressed, the system
will blow ambient temperature air or
heated air.
■Adjusting the fan speed set-
ting
Operate the fan speed control
switch upwards to increase the fan
speed and downwards to decrease
the fan speed.
Press the “OFF” switch to turn off the
fan.
■Change the airflow mode
Operate the airflow mode control
switch upwards or downwards.
The mode changes as follows each
time the switch is operated.
1 Air flows to the upper body.
2 Air flows to the upper body and
feet.
3 Air flows to the feet.
4 Air flows to the feet and the
windshield defogger operates.
■Switching between outside air
and recirculated air modes
Press the outside/recirculated air
mode switch.
The mode switches between outside air
mode (the indicator is off) and recircu-
lated air mode (the indicator is on) each
time the switch is pressed.
■Set cooling and dehumidifica-
tion function
Press the “A/C” switch.
When the function is on, the indica-
tor illuminates on the “A/C” switch.

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6-1. Using the air conditioning system and defogger
normal air conditioning operation. Also,
the outside of the windshield may fog up due to the outside temperature, humidity or air conditioning set temperature.
■Security feature
Any unlocked doors will be automatically locked when the system is operating. The emergency flashers flash to indicate
that the doors have been locked.
■Conditions affecting operation
 P. 2 0 4
■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.However, this does not indicate a mal-
function.
●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, meter, etc. will not operate.
●The intrusion sensor will automatically be canceled.
■Electronic key battery depletion
 P. 1 8 2
■When the electronic key battery is fully depleted
 P. 4 9 9
■Customization
Setting (e.g. Operation using “A/C” on the wireless remote control) can be changed. (Customizable features:
 P.572)
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. Chil-
dren and pets left inside the vehicle may suffer heatstroke dehydration or hypothermia, or could result in
death or serious injury.
●Depending on the surrounding envi-
ronment, signals from the wireless switch may transmit further than expected. Pay appropriate attention
to the vehicle’s surroundings and use the switch only when neces-sary.
●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 traction battery
from being discharged through incorrect operation
Use “A/C” only when necessary.