2023 TOYOTA BZ4X key battery

1694-2. Opening, closing and locking the doors
Owners Manual_USA_M42C01_en
4
Before driving
by a finger, touch the lock sensor
with the palm.
When gloves are being worn,
remove the gloves.
■Door lock buzzer
If an attempt to lock the doors using
the smart key system is made when
a door other than t he door you are
locking is open, a buzzer sounds
continuously for 5 seconds. Fully
close all the doors, and lock the
vehicle once more.
■Setting the alarm (if equipped)
Locking the doors will set the alarm
system. ( P.69)
■Conditions affecting the opera-
tion of the smart key system or
wireless remo te control
 P. 1 8 8
■If the smart key system or the
wireless remote control does
not operate properly
●Use the mechanical key to lock
and unlock the doors. ( P.539)
●Replace the key battery with a
new one if it is depleted. ( P.497)
■If the 12-volt battery is dis-
charged
The doors cannot be locked and
unlocked using the smart key sys-
tem or wireless remote control. Lock
or unlock the doors using the
mechanical key. ( P.539)
■Rear seat reminder function
●In order to remind you not to for-
get luggage, etc., in the rear seat,
when the power switch is turned to
OFF after any of the following con-
ditions are met, a buzzer will sound and a message will be dis-
played on the multi-information
display for approximately 6 sec-
onds.
• The EV system is started within 10 minutes after opening and closing
a rear door.
• A rear door has been opened and closed after the EV system was
started.
However, if a rear door is opened
and then closed within approxi-
mately 2 seconds, the rear seat
reminder function may not operate.
●The rear seat reminder function
determines that luggage, etc., has
been placed in a rear seat based
on opening and closing of a rear
door. Therefore, depending on the
situation, the rear seat reminder
function may not operate and you
may still forget l uggage, etc., in
the rear seat, or it may operate
unnecessarily.
●The rear seat reminder function
can be enabled/disabled.
(  P.566)
■Customization
Settings (e.g. unlocking function
using a key) can be changed.
(Customizable features:  P.569)
WARNING
■To prevent an accident
Observe the following precautions
while driving the vehicle.
Failure to do so may result in a
door opening and an occupant
could be thrown out of the vehicle,
resulting in death o r serious injury.
●Ensure that all doors are prop-
erly closed and locked.

1814-2. Opening, closing and locking the doors
Owners Manual_USA_M42C01_en
4
Before driving
●When charging from an external
power source or connecting the
AC charging cable
●When the vehicle is parked near
an electrical noise source which
affects the sensitivity of the Hands
Free Power Back Door, such as a
pay parking spot , gas station,
electrically heated road, or fluo-
rescent light
●When the vehicle is near a TV
tower, electric po wer plant, radio
station, large display, airport or
other facility that generates strong
radio waves or electrical noise
●When a large amount of water is
applied to the rear bumper, such
as when the vehicle is being
washed or in heavy rain
●When mud, snow, ice, etc. is
attached to the rear bumper
●When the vehicle has been
parked for a while near objects
that may move and contact the
rear bumper, such as plants
●When an accessory is installed to
the rear bumper
If an accessory has been installed,
turn the Hands Free Power Back
Door operation setting off.
■Preventing unintentional opera-
tion of the Hands Free Power
Back Door (vehicles with Hands
Free Power Back Door)
When an electronic key is in the
operation range, the Hands Free
Power Back Door may operate unin-
tentionally, so be ca reful in the fol-
lowing situations.
●When a large amount of water is
applied to the rear bumper, such
as when the vehicle is being
washed or in heavy rain
●When dirt is wiped off the rear
bumper
●When a small animal or small
object, such as a ball, moves
under the rear bumper
●When an object is moved from
under the rear bumper
●If someone is swinging their legs
while sitting on the rear bumper
●If the legs or another part of some-
one’s body contacts the rear
bumper while passing by the vehi-
cle
●When the vehicle is parked near
an electrical noise source which
affects the sensitivity of the Hands
Free Power Back Door, such as a
pay parking spot, gas station,
electrically heated road, or fluo-
rescent light
●When the vehicle is near a TV
tower, electric pow er plant, radio
station, large display, airport or
other facility that generates strong
radio waves or electrical noise
●When the vehicle is parked in a
place where objects such as
plants are near the rear bumper
●If luggage, etc. is set near the rear
bumper
●If accessories or a vehicle cover is
installed/removed near the rear
bumper
●When the vehicle is being towed
To prevent unintentional operation,
turn the Hands F ree Power Back
Door operation setting off. ( P.185)
■When reconnecting the 12-volt
battery
To enable the power back door to
operate properly, close the back
door manually.
■If the back door opener is inop-
erative
The back door can be unlocked
from the inside.
1 Remove the cover.
To prevent damage, cover the tip of
the screwdriver with a rag.

1884-2. Opening, closing and locking the doors
Owners Manual_USA_M42C01_en
●When an exterior alarm sounds
once for 5 seconds
●When an interior alarm pings con-
tinuously
■Battery-saving function
The battery-saving function will be
activated in order to prevent the
electronic key battery and the 12-
volt battery from being discharged
while the vehicle is not in operation
for a long time.
●In the following situations, the
smart key system may take some
time to unlock the doors.
• The electronic key has been left in
an area of approximately 11.5 ft.
(3.5 m) of the outside of the vehi-
cle for 2 minutes or longer.
• The smart key system has not been used for 5 days or longer.
●If the smart key system has not
been used for 14 days or longer,
the doors canno t be unlocked at
any doors except the driver’s door.
In this case, take hold of the
driver’s door handle, or use the
wireless remote control or the mechanical key, to unlock the
doors.
■Turning an electronic key to
battery-saving mode
●When battery-saving mode is set,
battery depletion is minimized by
stopping the electronic key from
receiving radio waves.
Press twice while pressing
and holding .
Confirm that the ele ctronic key indi-
cator flashes 4 times.
While the battery-saving mode is
set, the smart key system cannot be
used. To cancel the function, press
any of the electronic key buttons.
●Electronic keys that will not be
used for long periods of time can
be set to the battery-saving mode
in advance.
■Conditions affecting operation
The smart key system uses weak
radio waves. In the following situa-
tions, the communication between
the electronic key and the vehicle
may be affected, preventing the
smart key system, wireless remote
control and immobilizer system from
operating properly.
●When the electronic key battery is
depleted
●Near a TV tower, electric power
plant, gas station, radio station,
large display, airpo rt or other facil-
ity that generates strong radio
waves or electrical noise
●When the electronic key is in con-
SituationCorrection pro-
cedure
An attempt was
made to lock the
vehicle while a
door was open.Close all of the
doors and lock
the doors again.
SituationCorrection pro-cedure
The power
switch was
turned to ACC
while the driver’s
door was open
(or the driver’s
door was opened
while the power
switch was in
ACC).
Turn the power
switch to OFF
and close the
driver’s door.

1894-2. Opening, closing and locking the doors
Owners Manual_USA_M42C01_en
4
Before driving
tact with, or is covered by the fol-
lowing metallic objects
• Cards to which al uminum foil is
attached
• Cigarette boxes that have alumi- num foil inside
• Metallic wallets or bags
• Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
●When another wireless key (that
emits radio waves) is being used
nearby
●When carrying the electronic key
together with the following devices
that emit radio waves
• Portable radio, cellular phone, cordless phone or other wireless
communication devices
• Another electronic key or a wire- less key that emits radio waves
• Personal computers or personal
digital assistants (PDAs)
• Digital audio players
• Portable game systems
●If window tint with a metallic con-
tent or metallic objects are
attached to the rear window
●When the electronic key is placed
near a battery charger or elec-
tronic devices
●When the vehicle is parked in a
pay parking spot where radio
waves are emitted.
■Note for the entry function
●Even when the electronic key is
within the effective range (detec-
tion areas), the system may not
operate properly in the following
cases:
• The electronic key is too close to the window or outside door han-
dle, near the ground, or in a high
place when the doors are locked
or unlocked.
• The electronic key is on the instru- ment panel, luggage cover or
floor, or in the door pockets or
glove box when the EV system is
started or power switch modes are
changed.
●Do not leave the electronic key on
top of the instrument panel or near
the door pockets when exiting the
vehicle. Depending on the radio
wave reception conditions, it may
be detected by the antenna out-
side the cabin and the door will
become lockable from the outside,
possibly trapping the electronic
key inside the vehicle.
●As long as the electronic key is
within the effective range, the
doors may be locked or unlocked
by anyone. However, only the
doors detecting the electronic key
can be used to lo ck or unlock the
vehicle.
●Even if the electro nic key is not
inside the vehicle, it may be possi-
ble to start the EV system if the
electronic key is near the window.
●The doors may unlock if a large
amount of water splashes on the
door handle, such as in the rain or
in a car wash when the electronic
key is within the effective range.
(The doors will au tomatically be
locked after approximately 60 sec-
onds if the doors are not opened
and closed.)
●If the wireless remote control is
used to lock the doors when the
electronic key is near the vehicle,
there is a possib ility that the door
may not be unlocked by the entry
function. (Use the wireless remote
control to unlock the doors.)
●Touching the door lock sensor
while wearing gloves may delay or
prevent lock operation. Remove
the gloves and touch the lock sen-
sor again.
●When the lock operation is per-
formed using the lock sensor, rec-
ognition signals will be shown up
to two consecutive times. After
this, no recognition signals will be
given.
●If the door handle becomes wet
while the electronic key is within
the effective range, the door may

1904-2. Opening, closing and locking the doors
Owners Manual_USA_M42C01_enlock and unlock repeatedly. In that
case, follow the fo
llowing correc-
tion procedures to wash the vehi-
cle:
• Place the electronic key in a loca- tion 6 ft. (2 m) or more away from
the vehicle. (Take care to ensure
that the key is not stolen.)
• Set the electronic key to battery-
saving mode to disable the smart
key system. ( P.188)
●If the electronic key is inside the
vehicle and a door handle
becomes wet during a car wash, a
message may be shown on the
multi-informatio n display and a
buzzer will sound outside the vehi-
cle. To turn off the alarm, lock all
the doors.
●The lock sensor may not work
properly if it com es into contact
with ice, snow, mud, etc. Clean
the lock sensor and attempt to
operate it again.
●A sudden approach to the effec-
tive range or door handle may pre-
vent the doors from being
unlocked. In this case, return the
door handle to the original position
and check that the doors unlock
before pulling the door handle
again.
●If there is another electronic key in
the detection area, it may take
slightly longer to unlock the doors
after the door handle is gripped.
■When the vehicle is not driven
for extended periods
●To prevent theft of the vehicle, do
not leave the electronic key within
6 ft. (2 m) of the vehicle.
●The smart key system can be
deactivated in advance. ( P.569)
●Battery-saving mode can reduce
the power consumption of elec-
tronic keys. ( P.188)
■To operate the system properly
Make sure to carry the electronic
key when operating the system. Do
not get the electronic key too close to the vehicle when operating the
system from the out
side of the vehi-
cle.
Depending on the position and hold-
ing condition of the electronic key,
the key may not be detected cor-
rectly and the system may not oper-
ate properly. (The alarm may go off
accidentally, or the door lock pre-
vention may not operate.)
■If the smart key system does
not operate properly
●If the doors cannot be locked or
unlocked, perform the following.
• Bring the electronic key close to the door handle and perform a
lock or unlock operation.
• Use the wireless remote control.
If the doors cannot be locked or
unlocked by perform the above, use
the mechanical key. ( P.539)
However, if the mechanical key is
used while the alarm system is set,
the warning will sound. ( P. 6 9 )
●If the EV system cannot be
started, refer to P.540
■Customization
Settings (e.g. smart key system)
can be changed.
(Customizable features: P.569)
If the smart key system has been
deactivated in a customized setting,
refer to the explanations for the fol-
lowing operations.
●Locking and unlocking the doors:
Use the wireless remote control or
mechanical key. ( P.167, 539)
●Starting the EV system and
changing power switch modes:
P. 5 4 0
●Stopping the EV system: P. 2 3 3

2144-5. Opening, closing the windows
Owners Manual_USA_M42C01_en
This function can be used to
prevent children from acciden-
tally opening or closing a pas-
senger window.
Press the switch.
The indicator will come on and
the passenger windows will be locked.
The passenger windows can still be
opened and closed using the
driver’s switch even if the lock
switch is on.
■The window lock switch can be
operated when
The power switch is in ON.
■When the 12-volt battery is dis-
connected
The window lock switch is disabled.
If necessary, press the window lock
switch after reconnecting the 12-volt
battery.
WARNING
●When exiting the vehicle, turn
the power switch to OFF, carry
the key and exit the vehicle
along with the child. There may
be accidental operation, due to
mischief, etc., that may possibly
lead to an accident.
■Jam protection function
●Never use any part of your body
to intentionally a ctivate the jam
protection function.
●The jam protection function may
not work if something gets
jammed just before the side
window is fully closed. Be care-
ful not to get any part of your
body jammed in the side win-
dow.
■Catch protection function
●Never use any part of your body
or clothing to intentionally acti-
vate the catch p rotection func-
tion.
●The catch protection function
may not work if something gets
caught just before the side win-
dow is fully opened. Be careful
not to get any part of your body
or clothing caught in the side
window.
Preventing accidental
operation (window lock
switch)

2325-2. Driving procedures
Owners Manual_USA_M42C01_enshown on the multi-information
display, read the message and fol-
low the instructions.
●If the door is unlocked with the
mechanical key, the EV system
cannot be started using the smart
key system. Refer to P.540 to start
the EV system. However, if the
electronic key is carried inside the
vehicle and the do
ors are locked
(  P.170), the EV system can be
started.
■When the ambient temperature
is low, such as during winter
driving conditions
●When starting the EV system, the
flashing time of the “READY” indi-
cator may be long. Leave the
vehicle as it is until the “READY”
indicator is steady on, as steady
means the vehicle is able to move.
●When the traction battery is
extremely cold (below approxi-
mately -22°F [-30°C]) under the
influence of the outside tempera-
ture, it may not be possible to start
the EV system. In this case, try to
start the EV system again after the
temperature of the traction battery
increases due to the outside tem-
perature increase, etc.
■Sounds and vibrations specific
to an battery electric vehicle
 P. 7 4
■If the 12-volt battery is dis-
charged
The EV system cannot be started
using the smart key system. Refer
to P.541 to restart the EV system.
■Electronic key battery depletion
 P. 1 6 2
■Conditions affecting operation
 P. 1 8 8
■Note for the entry function
 P. 1 8 9
■If there is a malfunction in the
smart key system
If “Smart Key System Malfunction”
is displayed on the multi-information
display, the system may be malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer immediately.
■If the “READY” indicator does
not come on
In the event that the “READY” indi-
cator does not come on even after
performing the proper procedures
for starting the vehicle, contact your
Toyota dealer immediately.
■If the EV system is malfunction-
ing
 P. 8 0
■Electronic key battery
 P.497
■Operation of the power switch
●If the switch is not pressed shortly
and firmly, the power switch mode
may not change or the EV system
may not start.
●If attempting to restart the EV sys-
tem immediately after turning the
power switch to OFF, the EV sys-
tem may not start in some cases.
After turning the power switch to
OFF, please wait a few seconds
before restarti ng the EV system.
■Customization
If the smart key system has been
deactivated in a customized setting,
refer to P.540.
WARNING
■When starting the EV system
Always start the EV system while
sitting in the driver’s seat. Do not
depress the accelerator pedal
while starting the EV system
under any circumstances.
Doing so may cause an accident
resulting in death o r serious injury.

2495-3. Operating the lights and wipers
Owners Manual_USA_M42C01_en
5
Driving
■Automatic light off system
●When the headlights are on: The
lights turn off 30 seconds after the
power switch is turned to ACC or
OFF and a door is opened and
closed. (The lights turn off immedi-
ately if on the key is
pressed after all the doors are
closed.)
●When only the tail lights are on:
The tail lights tu rn off automati-
cally if the power switch is turned
to ACC or OFF and the driver’s
door is opened.
To turn the lights on again, turn the
power switch to ON, or turn the light
switch to the or position
once and then back to or
position.
■Light reminder buzzer
A buzzer sounds when the power
switch is turned to ACC or OFF and
the driver’s door is opened while the
lights are turned on.
■Automatic headlight leveling
system
The level of the headlights is auto-
matically adjusted according to the
number of passengers and the load-
ing condition of the vehicle to
ensure that the headlights do not
interfere with other road users.
■Windshield wiper linked head-
light illumination
When driving during daytime with
the headlight switch turned to , if the windshield wipers are used, the
headlights will turn o
n automatically
after several seconds to help
enhance the visibility of your vehi-
cle.
■12-volt battery-saving function
In order to prevent the 12-volt bat-
tery of the vehicle from discharging,
if the headlights and/or tail lights are
on when the power switch is turned
to OFF, the battery saving function
will operate and au tomatically turn
off all the lights af ter approximately
20 minutes.
When any of the following are per-
formed, the 12-volt battery-saving
function is canceled once and then
reactivated. All the lights will turn off
automatically 20 minutes after the
12-volt battery-saving function has
been reactivated:
●When the headlight switch is oper-
ated
●When a door is opened or closed
■If “Headlight System Malfunc-
tion Visit Your Dealer” is dis-
played on the multi-information
display
The system may be malfunctioning.
Have the vehicle inspected by your
Toyota dealer.
■Customization
Settings (e.g. light sensor sensitiv-
ity) can be changed.
(Customizable features:  P.572)
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the lights on longer
than necessary when the EV sys-
tem is not operating.