2023 TOYOTA BZ4X warning light

4687-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
■Checking fluid level
The brake fluid level should be
between the “MAX” and “MIN”
lines on the tank.
Reservoir cap
“MAX” line
“MIN” line
■Adding fluid
Make sure to check the fluid
type and prepare the necessary
item.
 Fluid type
FMVSS No.116 DOT 3 or SAE J1703 brake fluid
FMVSS No.116 DOT 4 or SAE
J1704 brake fluid

Item
Clean funnel
■Brake fluid can absorb moisture
from the air
Excess moisture in the brake fluid
can cause a dangerous loss of brak-
ing efficiency. Use only newly
opened brake fluid.
Check the 12-volt battery as fol-
lows.
■12-volt battery exterior
Make sure that the 12-volt bat-
tery terminals are not corroded
NOTICE
■When adding coolant
Coolant is neither plain water nor
straight antifreeze. The correct
mixture of water and antifreeze
must be used to provide proper
lubrication, corrosion protection
and cooling. Be sure to read the
antifreeze or coolant label.
■If you spill coolant
Be sure to wash it off with water to
prevent it from d amaging parts or
paint.
Checking and adding the
brake fluidWARNING
■When filling the reservoir
Take care as brake fluid can harm
your hands and eyes and damage
painted surfaces.
If fluid gets on your hands or in
your eyes, flush the affected area
with clean water immediately. If
you still experience discomfort,
see a doctor.
NOTICE
■If the fluid level is low or high
It is normal for the brake fluid level
to go down slight ly as the brake
pads wear out or when the fluid
level in the accumulator is high.
If the reservoir needs frequent
refilling, there m ay be a serious
problem.
Checking the 12-volt bat-
tery

4707-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_enthe second attempt.
●The power switch mode is
recorded by the vehicle. If the 12-
volt battery is
disconnected and
reconnected, the vehicle will
return the power switch mode to
the status it was in before the 12-
volt battery was disconnected.
Make sure to turn off the power
switch before disconnecting the
12-volt battery. Take extra care
when connecting the 12-volt bat-
tery if the power switch mode prior
to the 12-volt battery being dis-
connected is unknown.
If the EV system will not start even
after multiple att empts at all the
methods above, contact your Toyota
dealer.
WARNING
■Chemicals in the 12-volt bat-
tery
Batteries contai n poisonous and
corrosive sulfuric acid and may
produce hydrogen gas which is
flammable and explosive. To
reduce the risk of death or serious
injury, take the following precau-
tions while working on or near the
12-volt battery:
●Do not cause sparks by touch-
ing the 12-volt battery terminals
with tools.
●Do not smoke or light a match
near the 12-volt battery.
●Avoid contact with eyes, skin
and clothes.
●Never inhale or swallow electro-
lyte.
●Wear protective safety glasses
when working near the 12-volt
battery.
●Keep children away from the
12-volt battery.
■Where to safely charge the
12-volt battery
Always charge the 12-volt battery
in an open area. Do not charge
the 12-volt battery in a garage or
closed room where there is insuf-
ficient ventilation.
■Emergency measures regard-
ing electrolyte
●If electrolyte gets in your eyes
Flush your eyes with clean
water for at least 15 minutes
and get immediate medical
attention. If possible, continue
to apply water with a sponge or
cloth while traveling to the near-
est medical facility.
●If electrolyte gets on your skin
Wash the affected area thor-
oughly. If you feel pain or burn-
ing, get medical attention
immediately.
●If electrolyte gets on your
clothes
It can soak through clothing on
to your skin. Imm ediately take
off the clothing and follow the
procedure above if necessary.
●If you accidentally swallow elec-
trolyte
Drink a large quantity of water
or milk. Get emergency medical
attention immediately.
■When there is insufficient 12-
volt battery fluid
Do not use if there is insufficient
fluid in the 12-volt battery. There
is a possible danger that the 12-
volt battery may explode.

4747-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
Rotate the tires in the order
shown.
To equalize tire wear and extend
tire life, Toyota recommends that
tire rotation is carried out at the
same interval as tire inspection.
Do not fail to initialize the tire pres-
sure warning system after tire rota-
tion.
Front
■When rotating the tires
Make sure that the power switch is
OFF. If the tires are rotated while the
power switch is in ON, the tire posi-
tion information will not be updated.
If this accidentally occurs, either turn
the power switch to OFF and then to
ON, or initialize the system after
checking that the tire pressure is
properly adjusted.
Your vehicle is equipped with a
tire pressure warning system
that uses tire pressure warning
valves and transmitters to detect
low tire inflation pressure before
serious problems arise.
The tire pressure warning sys-
tem of this vehicle adopts a 2-
type warning system.
 When “Adjust Pressure” is
displayed (Normal Warning)
A warning with the tire pressure
warning light and warning buzzer
when there is an unknown level of
low tire pressure with the appear-
ance of the tire due to natural air
leakage as well as the pressure
lowering due to changes in the
pressure according to the outside
temperature.
When “Immediately Check
Tire when Safe” is displayed
(Emergency Warning)
A warning with the tire pressure
warning light and warning buzzer
when there is a k nown level of low
tire pressure with the appearance
of the tire due to pressure suddenly
lowering.
However, the system may not be
able to detect sudden tire ruptures
(bursting, etc.).
 The tire pressure detected by
the tire pressure warning sys-
tem can be displayed on the
multi-information display.
NOTICE
■If tire inflation pressure of
each tire becomes low while
driving
Do not continue driving, or your
tires and/or wheels may be
ruined.
Tire rotation
Tire pressure warning
system

4767-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
●Performance may be affected in
the following situations.
• 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 carrying a portable radio, cellular phone, cordless phone or
other wireless communication
device
If tire position information is not cor-
rectly displayed due to the radio
wave conditions, the display may be
corrected by driving and changing
the radio wave conditions.
●When the vehicle is parked, the
time taken for the warning to start
or go off could be extended.
●When tire inflation pressure
declines rapidly for example when
a tire has burst, the warning may
not function.
When replacing tires or wheels,
tire pressure warning valves and
transmitters must also be
installed.
When new tire pressure warning
valves and transmitters are
installed, new ID codes must be
registered in the tire pressure warn-
ing computer and the tire pressure
warning system must be initialized.
(  P.481)
■When replacing the tires and
wheels
If the ID code of the tire pressure
warning valve and transmitter is not
registered, the tire pressure warning
system will not work properly. After driving for about 10 minutes, the tire
pressure warning light blinks for 1
minute and stays on to indicate a
system malfunction.
Installing tire pressure
warning valves and trans-
mitters
NOTICE
■Repairing or replacing tires,
wheels, tire pressure warn-
ing valves, transmitters and
tire valve caps
●When removing or fitting the
wheels, tires or the tire pressure
warning valves and transmit-
ters, contact your
Toyota dealer
as the tire pressure warning
valves and transmitters may be
damaged if not handled cor-
rectly.
●Make sure to install the tire
valve caps. If the tire valve caps
are not installed, water could
enter the tire pressure warning
valves and the tire pressure
warning valves could be bound.
●When replacing tire valve caps,
do not use tire valve caps other
than those specified. The cap
may become stuck.
■To avoid damage to the tire
pressure warning valves and
transmitters
When a tire is repa ired with liquid
sealants, the tire pressure warn-
ing valve and transmitter may not
operate properly. If a liquid seal-
ant is used, contact your Toyota
dealer as soon as possible. After
use of liquid sealant, make sure to
replace the tire p ressure warning
valve and transmitter when repair-
ing or replacing the tire.

4787-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_enmore, park the vehicle in a safe
place for approximately 15 minutes
and then drive th
e vehicle again.
■When performing wheel posi-
tion registration
●Normally, wheel position registra-
tion can be completed within
approximately 30 minutes.
●Wheel position registration is per-
formed while driving at a vehicle
speed of approximately 25 mph
(40 km/h) or more.
■The initialization operation
●If the power switch is turned off
while registering the wheel posi-
tion, the next time the power
switch is turned to ON, the wheel
position registr ation will resume
and it will not be necessary to
restart the procedure.
●While the position of each tire is
being determined and the inflation
pressures are not being displayed
on the multi-information display, if
the inflation pres sure of a tire
drops, the tire pressure warning
light will come on.
■If the tire pressure warning sys-
tem is not registered properly
●In the following situations, wheel
position registration may take lon-
ger than usual to b e completed or
may not be possible.
• Vehicle is not driven at approxi-
mately 25 mph ( 40 km/h) or more
• Vehicle is driven on unpaved roads
If initialization does not complete
after driving for 1 hour or more, park
the vehicle in a safe place for
approximately 15 minutes and then
drive the vehicle again.
●If the vehicle is reversed during
wheel position registration, all
data collected until then will be
cleared. Perform driving again.
■When you need to setting
the tire pressure
In the following situations, it will
be necessary to perform the tire
inflation pressure setting proce-
dure of the tire pressure warning
system.
 When the specified tire infla-
tion pressure has changed,
such as due to carried load,
etc.
 When the tire inflation pres-
sure is changed such as
when the tire size is changed.
If the tire inflation pressure has
been adjusted to the specified
level, perform the tire inflation
setting procedure by selecting
specified inflation pressure on
the multi-information display.
When the tire inflation pressure
is to be other than specified,
such as when tires other than
the specified size are used, etc.,
set the tire inflation pressure
using the current pressure.
Make sure to adjust the tire
inflation pressure of each tire to
the appropriate level before per-
forming tire pressure setting.
The tire pressure warning sys-
tem operates based on this tire
inflation pressure.
Setting the tire pressure

4797-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
7
Maintenance and care
■Setting by selecting a spec-
ified tire inflation pressure
1 Start the EV system
( P.231)
The tire inflation pressure cannot
be set while the vehicle is moving.
2Press or of the meter
control switches and select
.
3 Press or of the meter
control switches and select
“Vehicle Settings”, and then
press and hold the “OK”.
4 Press or of the meter
control switches and select
“TPWS Setting”, and then
press “OK”.
5 Press or of the meter
control switches and select
“Tire Pressure Setting”, and
then press “OK”.
6 Press or of the meter
control switches and select
“Setting by Specified Pres-
sure”, and then press “OK”.
Select the desired front and rear
tire pressures.
7Press or of the meter
control switches and select
“OK”, and then press “OK”.
The tire pressure warning light will
slowly blink 3 times and a message
indicating that tire inflation pressure
is being set will be displayed on the
multi-information display. After setting the tire inflation pres-
sure, a message indicating that set-
ting has been completed will be
displayed on the multi-information
display.
“Setting Pressure Wait a
Moment”
■Setting using the current
tire inflation pressure
1 Adjust the tire inflation pres-
sure to the specified cold tire
inflation pressure level.
Make sure to adjust the tire pres-
sure to the specifie d cold tire infla-
tion pressure level. The tire
pressure warning system will oper-
ate based on this pressure level.
2Start the EV system
( P.231)
The tire inflation pressure cannot
be set while the ve hicle is moving.
3Press or of the meter
control switches and select
.
4 Press or of the meter
control switches and select
“Vehicle Settings”, and then
press and hold the “OK”.

4807-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
5Press or of the meter
control switches and select
“TPWS Setting”, and then
press “OK”.
6 Press or of the meter
control switches and select
“Tire Pressure Setting”, and
then press “OK”.
7 Press or of the meter
control switches and select
“Setting by Current Pressure”
and then press “OK”.
8 Press or of the meter
control switches and select
“OK”, and then press “OK”.
The tire pressure warning light will
slowly blink 3 times and a message
indicating that tire inflation pressure
is being set will be displayed on the
multi-information display.
After setting the tire inflation pres-
sure, a message indicating that set-
ting has been completed will be
displayed on the multi-information
display.
“Setting Pressure Wait a
Moment”
■Warning performance of the tire
pressure warning system (Set-
ting using the current tire infla-
tion pressure)
●When performing the tire pressure
setting using the current tire infla-
tion pressure, the warning timing
of the tire pressure warning sys-
tem will vary according to the con-
ditions under which tire pressure
setting was performed. Therefore,
a warning may be output even if
the tire inflation pressure drops
slightly or if the ti re inflation pres-
sure increases above that when
the tire inflation pressure was set.
●Make sure to per form the tire
pressure setting p rocedure after
adjusting the tire inflation pres-
sure. Also, make sure the tires are
cold before performing the tire
pressure setting procedure or
adjusting the tire inflation pres-
sure.
■Tire inflation pressure setting
procedure (Setting using the
current tire inflation pressure)
●If the power switch is turned off
while setting the tir e inflation pres-
sure, the next time the power
switch is turned to ON, the setting
procedure will resume and it will
not be necessary to restart the
procedure.
●If the tire inflation pressure setting
procedure is started unnecessar-
ily, adjust the tire inflation pres-
sure to the specified level with the
tires cold and then perform setting
by selecting a specified tire infla-
tion pressure, or perform the tire
inflation pressure setting proce-
dure with the curren t tire inflation
pressure.
■If the tire inflation pressure can-
not be set properly
●Normally, the tire inflation pres-
sure setting pro cedure can be
completed in 2 or 3 minutes.
●If the tire pressur e warning light

4817-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
7
Maintenance and care
does not blink 3 times when start-
ing the tire inflation pressure set-
ting procedure, the procedure
may not have started. Perform the
procedure again from the begin-
ning.
●If tire inflation pressure setting
procedure cannot be completed
after performing the above proce-
dure, contact your Toyota dealer.
■When the registering ID
codes
The tire pressure warning valve
and transmitter is equipped with
a unique ID code.
When new tire pressure warning
valves and transmitters are
installed, new ID codes must be
registered in the tire pressure
warning computer.
■How to registration ID code
1 Park the vehicle in a safe
place, wait for approximately
15 minutes.
2 Start the EV system.
( P.231)
The ID code registration procedure cannot be performed while the
vehicle is moving.
3
Press or of the meter
control switches and select
.
4 Press or of the meter
control switches and select
“Vehicle Settings”, and then
press and hold the “OK”.
5 Press or of the meter
control switches and select
“TPWS Setting”, and then
press “OK”.
6 Press or of the meter
control switches and select
“Tire Set Switching”, and then
press “OK”.
7 Press or of the meter
control switches and select
“Register New Valve/ID” and
then press “OK”.
8 Check if the desired wheel
set (“Tire Set 1” or “Tire Set
2”) is displayed.
ID codes will be regi stered to the
displayed wheel set.
To change the whee l set to be reg-
istered, press or of the
meter control switches, and then
select the wheel set you wish to
register.
If ID codes have already been reg-
istered for that wheel set, the tire
pressure warning light will slowly
blink 3 times, and a message indi-
cating that change is occurring will
WARNING
■When setting using the cur-
rent tire inflation pressure
Make sure to adjust the tire infla-
tion pressure of each tire to the
appropriate level before perform-
ing tire pressure setting. Other-
wise, the tire pressure warning
light may not illuminate even if the
tire inflation pressure drops or
may illuminate ev en though the
tire inflation pressure is normal.
Registering ID codes