2023 TOYOTA BZ4X cooling

732-1. Electric vehicle system
Owners Manual_USA_M42C01_en
2
Electric Vehicle system
Provides electricity to various vehicle systems such as the SRS airbags,
headlights, wipers, etc.
*: AWD models only
■When braking (regenera-
tive braking)
The electric motor (traction
motor) charges the traction bat-
tery.
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 out-
lets can be used for charging.
Procedures are different from
refueling a conventional vehi-
cle. Therefore, make sure to
read the following thoroughly.
 Charging equipment ( P.85)
 AC charging cable ( P. 8 7 )
 Power sources that can be
used ( P.102)
 Things to know before
charging ( P.102)
 How to charge your vehicle
( P.105, 113)
 When charging cannot be
performed normally ( P.133)■Regenerative braking
In the following situ ations, kinetic
energy is converted to electric
energy and deceler ation force can
be obtained in con junction 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 trac-
tion 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 proce-
dures. ( P.541)
■When not using t he 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 dis-
charged. In this c ase, the cooling
fan may operate, however it is not
a malfunction.
●To p r e v e n t t h e 1 2 - v o l t b a t t e r y f r o m
being discharged, do not leave the
charging port lid open or the
charging cable connected to the
vehicle.
Charging

742-1. Electric vehicle system
Owners Manual_USA_M42C01_en
■Charging the traction battery
Be sure to maintain the traction bat-
tery charge level suitable for your
driving needs.
If the traction battery fully dis-
charges, 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 message will be displayed
on the multi-information display.
(  P.515)
●If the traction batte ry is completely
discharged, the EV system cannot
be started and dri ving will not be
possible. When the traction bat-
tery 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
battery electric vehi cle for being off
when it is actually still running, as
indicated by the “READY” indicator
being illuminated. F or 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
vibrations may occur. However,
these sounds and/o r vibrations are
not signs of malfunctions:
●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 lug-
gage compartment.
●Electrical relay sounds may be
heard from the motor compart-
ment when the EV system starts or stops.
●Relay operating sounds such as a
snap or soft clank will be emitted
from the traction b
attery in the fol-
lowing situations:
• When the EV system is started or stopped
• When charging starts or com-
pletes
• When the vehicle is driven the first time after the traction battery has
been charged using DC charging
●Sounds may be heard due to
regenerative 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
conditioning system (air condition-
ing compressor, blower motor).
■Maintenance, repair, recycling,
and disposal
Contact your Toyota dealer regard-
ing maintenance, repair, recycling
and disposal. Do n ot dispose of the
vehicle yourself.
A sound which changes in
accordance with the driving
speed, will be played in order to
warn people nearby of the vehi-
cle’s approach. This sound may
be heard inside the vehicle. The
sound will stop when the vehicle
speed exceeds approximately
23 mph (37 km/h).
■Acoustic Vehicle Alerting Sys-
tem
In the following cases, the Acoustic
Vehicle Alerting System may be dif-
ficult for surrounding people to hear.
Acoustic Vehicle Alerting
System

762-1. Electric vehicle system
Owners Manual_USA_M42C01_enThe illustration is an example fo
r explanation and may differ from the actual
item.
Warning label
High voltage cables (orange)
ESU: Electricity Supply Unit (built in onboard traction battery
charger/DC-DC converter)
Service plug
AC charging inlet
Electric Vehicle system precautions
Be careful of the high voltage components (nominal voltage
at 355.2 V), such as the traction battery, electricity supply
unit, orange colored high voltage cables, and electric motor,
as well as high temperature components such as the cooling
radiator, which are provided on the battery electric vehicle.
For the high voltage components, warning labels are pro-
vided on them. Read them when they need to be handled.
System components

842-1. Electric vehicle system
Owners Manual_USA_M42C01_en
number of occupants.
Possible driving distance could
be extended if the followings are
performed:
Maintain a safe distance from
the vehicle in front and avoid
unnecessary acceleration and
deceleration
 Accelerate and decelerate the
vehicle as smoothly as possi-
ble
 Drive at moderate speeds as
much as possible and main-
tain a constant speed
 Set the air conditioning sys-
tem to a moderate tempera-
ture and avoid using the
heating and cooling functions
excessively.
 Use tires of the specified size
and maintain the specified tire
pressure
 Do not add unnecessary
weight to the vehicle
The followings indicate that
charging has been carried out
properly.
 The AC charging indicator
turns off
 “Charging complete” is dis-
played on the multi-informa-
tion display when a door is
opened while the power switch is off. (
P.101)
Regardless of the type of power
source or whether the charging
schedule function is used,
charging is completed if the
above can be confirmed.
Charging-related messages:
 P.140
Display when charging is
completed

1002-2. Charging
Owners Manual_USA_M42C01_enminate when the tr
action battery
cooler is on standby or operating.
●When the charge level of the trac-
tion battery is low, the traction bat-
tery cooler may n ot operate, even
if the temperature of the traction
battery is high.
●When the following conditions are
met while the trac tion 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 Sys- tem is operated ( P.409)
• The remaining charge of the trac-
tion battery drops below a certain
amount
●The traction battery cooler oper-
ates using power s upplied by the
traction battery and an external
power source.
• While the traction battery cooler is
operating, the charge of the trac-
tion battery will increase and
decrease within a certain range,
and will not increase as during AC
charging.
• When the traction battery cooler operates, charger will recognize it
as the battery being charged. If
this function ope rates 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.156) and select “Vehicle Set-
tings”, “Charging Se ttings”, “Battery
Cooler”, and change the setting.
When selecting to off, the traction
battery output may be restricted
depending on the driving situation.
To enable the use of battery
electric vehicle, we recommend
systematically charging the
vehicle.
■Before leaving home
In order to use the battery elec-
tric vehicle, charge the traction
battery at home before leaving.
■On the way to the destina-
tion or at the destination
When the remaining charge of
the traction battery gets low,
recharge the battery at the near-
est charging station.
Charging tips
This section explains meth-
ods for using the charging
function for this vehicle and
checking information
related to charging.
Systematically charging

1102-2. Charging
Owners Manual_USA_M42C01_en
WARNING
●When charging outdoors, make
sure to connect to a weather-
proof outlet for outdoor use.
Ensure the weatherproof outlet
cover closes completely. If the
weatherproof outlet cover can-
not be closed, install a weather-
proof outlet cover that will close.
●In order to stop charging at the
charging station, follow the
instructions 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 out-
let is submerged in water or
snow.
●When charging while it is raining
or snowing, do not connect or
disconnect the plug if your
hands are wet. Also, do not get
the plug or outlet 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
connector and CCID (Charging
Circuit Interrupting Device).
●Firmly insert the plug into the
outlet.
●Do not use an extension cord
and converting adaptor.
●Close the hood before using the
charging system.
The cooling fan may start oper-
ating suddenly. Touching or get-
ting 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 serious
injury.
●After connecting the charging
cable, confirm that it is not
wound around anything.
●If the power indicator on the
CCID (Charging Circuit Inter-
rupting Device) does not illumi-
nate after plugging the AC
charging cable into the outlet,
unplug it immediately.
■If the error warn ing indicator
on the CCID (Charging Circuit
Interrupting Device) illumi-
nates or flashes during
charging
There may be an electrical leak-
age in the power source path, or
there may be a malfunction in the
AC charging cable or CCID
(Charging Circuit Interrupting
Device).
Refer to P.90 and follow the cor-
rection procedure. If the error
warning indicator does not turn off
even after performing the correc-
tion procedure, immediately stop
charging, remove the AC
charging cable and contact your
Toyota dealer. Continuing to
charge the vehicle in that condi-
tion may lead to u nforeseen acci-
dents or serious injury.

1162-2. Charging
Owners Manual_USA_M42C01_en1
Be sure to engage the parking
brake and then turn the power
switch off.
2 Close the charging inlet cap,
close the charging port lid.
3 Check if “Checking Charging
System” is displayed on the
multi-information display when
the power switch is turned to ON.
Do not open the c harging port lid
while the charging system is check-
ing.
When the system check is com-
pleted, the power switch automati-
cally turns off.
4 Press the power switch while
depressing the brake pedal. The
“READY” indicator turns on.
Contact your Toyot a dealer if the
charging system check is done and
the message on the multi-informa-
tion display does not go off.
WARNING
■Warnings for DC charging
Be sure to observe the following
when using DC charging.
Failure to do so may cause an
accident that could lead to death
or serious injury.
●Check that the DC charger and
DC charging inlet are not dam-
aged. If there is any damage to
the DC charging inlet, do not
perform a DC charge and have
it inspected immediately at your
Toyota dealer.
●Do not touch the terminals of
the DC charging connector or
inlet with metallic sharp tips
(wires and needles), 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
adapters, extension cords, etc.,
between the DC charging con-
nector and DC ch arging inlet.
●When DC charging is inter-
rupted, follow the handling pro-
cedures of the DC charger.
Immediately stop the DC
charging when the re is an out-
break of heat, smoke, strange
noises or smells, etc., during
charging.
●Check that the DC charging
connector and DC charging inlet
do not have foreign objects or
snow or ice attached to it. If any-
thing is attached t o the inlet, be
sure to complete ly 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
suddenly start to run. Keep
hands and clothing (especially a
tie, a scarf or a muffler) away
from the fan. Fa ilure to do so
may cause the hands or cloth-
ing to be caught, resulting in
serious injury.

4036-1. Using the air conditioning system and defogger
Owners Manual_USA_M42C01_en
6
Interior features
■Adjusting the temperature
setting
Operate the temperature con-
trol switch upwards to increase
the temperature and downwards
to decrease the temperature.
If “A/C” is not pr essed, the system
will blow ambient t emperature air or
heated air.
■Setting the fan speed
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 con-
trol switch upwards or down-
wards.
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 oper-
ates.
■Switching between outside
air and recirculated air
modes
Press the outside/recirculated
air mode switch.
The mode switches between out-
side air mode (the indicator is off)
and recirculated air mode (the indi-
cator is on) each time the switch is
pressed.
■Set cooling and dehumidifi-
cation function
Press the “A/C” switch.
When the function is on, the indica-
tor illuminates on the “A/C” switch.
■Defogging the windshield
Defoggers are used to defog the
windshield and front side win-
dows.
Press the windshield defogger
switch.
Set the outside/recirculated air
mode switch to outside air mode
if the recirculated air mode is
used. (It may switch automati-
cally.)
To defog the windshield and the
side windows quickly, turn the
air flow and temperature up.
To return to the previous mode,
press the windshield defogger
switch again when the wind-
shield is defogged.