2023 TOYOTA BZ4X heater

4617-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
7
Maintenance and care
Heater cool-
ant level
(  P.465)
• “Toyota Super
Long Life Cool-
ant” or a similar
high quality eth-
ylene glycol-based
non-silicate, non-
amine, non-nitrite
and non-borate
coolant with long-
life hybrid organic
acid technology
“Toyota Super
Long Life Cool-
ant” is pre-mixed
with 50% coolant
and 50% deion-
ized water.
• Funnel (used only for adding coolant)
Fuses
( P.499)• Fuse with same
amperage rating
as original
Headlight aim
( P.501)Phillips-head
screwdriver
Radiator and
condenser
( P.466)

Tire inflation
pressure
( P.491)• Tire pressure
gauge
• Compressed air source
Washer fluid
( P.471)
• Water or washer
fluid containing
antifreeze (for win-
ter use)
• Funnel (used only for adding water or
washer fluid)
ItemsParts and toolsWARNING
The motor compartment contains
many mechanisms and fluids that
may move suddenly, become hot,
or become electrically energized.
To avoid death or serious injury,
observe the following precautions.
■When working on the motor
compartment
●Make sure that “POWER ON”
on the multi-information display
and the “READY” indicator are
both off.
●Keep hands, clothing and tools
away from the moving fan.
●Be careful not to touch the
motor, power control unit, radia-
tor, etc., right after driving as
they may be hot. Coolant and
other fluids may also be hot.
●Do not leave anything that may
burn easily, such as paper and
rags, in the motor compartment.
●Do not smoke, cause sparks or
expose an open flame to the 12-
volt battery. 12-volt battery
fumes are flammable.
●Be extremely cautious when
working on the 12-volt battery. It
contains poisonous and corro-
sive sulfuric acid.
●Never touch, disassemble,
remove or replace the high volt-
age parts, cables and their con-
nectors. It can cause severe
burns or electric shock that may
result in death or serious injury.

4657-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
7
Maintenance and care
Heater coolant reservoir ( P.465)
Washer fluid tank ( P.471)
Power control unit coolant reservoir ( P.467)
12-volt battery ( P.468)
Brake fluid reservoir ( P.468)
Fuse box ( P.499)
Radiator ( P.466)
Condenser ( P.466)
Electric cooling fan
The coolant level is satisfactory
if it is between the “MAX” and “MIN” lines on the reservoir
when the EV system is cold.
Motor compar tment
Components
Checking the heater cool-
ant

4667-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
Reservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
line. (P.545)
■Coolant selection
Only use “Toyota Super Long Life
Coolant” or a similar high quality
ethylene glycol based non-silicate,
non-amine, non-nitrite, and nonbo-
rate coolant with long-life hybrid
organic acid technology.
“Toyota Super Long Life Coolant” is
a mixture of 50% coolant and 50%
deionized water. (Minimum tem-
perature: -31°F [-35°C])
For more details about coolant, con-
tact your Toyota dealer.
■If the coolant level drops within
a short time of replenishing
Visually check the radiator, hoses,
power control unit coolant reservoir
caps, drain cock and water pump.
If you cannot find a leak, have your
Toyota dealer, test the cap and
check for leaks in the cooling sys-
tem.
Check the radiator and con-
denser and clear away any for-
eign objects.
If either of the above parts is
extremely dirty or you are not
sure of their condition, have
your vehicle inspected Toyota
dealer.
WARNING
■When the heater system is
hot
Do not remove the heater coolant
reservoir caps.
The heater system may be under
pressure and may spray hot cool-
ant if the cap is removed, causing
serious injuries, such as burns.
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 damaging parts or
paint.
Checking the radiator and
condenser
WARNING
■When the EV system is hot
Do not touch the radiator or con-
denser as they may be hot and
cause serious injuries, such as
burns.

4677-3. Do-it-yourself maintenance
Owners Manual_USA_M42C01_en
7
Maintenance and care
The coolant level is satisfactory
if it is between the “MAX” and
“MIN” lines on the reservoir
when the EV system is cold. Reservoir cap
“MAX” line
“MIN” line
If the level is on or below the “MIN”
line, add coolant up to the “MAX”
line.
■Coolant selection
In order to ensure maximum perfor-
mance of the traction battery cooling
system and limit risks of battery
short-circuit and other damage to your vehicle, Toyota recommends
using “Toyota Genuine Traction Bat-
tery Coolant” or similar high-quality
ethylene glycol-based, low electric
conductivity coolant, non-amine and
non-borate coolant with azole addi-
tives.
Toyota cannot guarantee that the
use of a product o
ther than “Toyota
Genuine Traction Battery Coolant”
will prevent risks of battery short-cir-
cuit or other damage.
Never use water as it will cause
damage.
Do not reuse cool ant that has been
removed from the radiator.
For more details about coolant, con-
tact your Toyota dealer.
■If the coolant level drops within
a short time of replenishing
Visually check the hoses, heater
coolant reservoir caps, drain cock
and water pump.
If you cannot find a leak, have your
Toyota dealer, t est the cap and
check for leaks in the cooling sys-
tem.
WARNING
■When the electric cooling fan
are operating
Do not touch the motor compart-
ment.
With the power switch in ON, the
electric cooling fan may automati-
cally start to run if the air condi-
tioning is on and/or the coolant
temperature is high. Be sure the
power switch is OFF when work-
ing near the electric cooling fan or
radiator grille.
Checking the power con-
trol unit coolant
WARNING
■When the EV system is hot
Do not remove the power control
unit coolant reservoir caps.
The cooling system may be under
pressure and may spray hot cool-
ant if the cap is removed, causing
serious injuries, such as burns.

5539-1. Specifications
Owners Manual_USA_M42C01_en
9
Vehicle specifications
NOTICE
■Cooling system coolant
In order to ensure maximum perfor mance of the traction battery cooling
system and limit risks of battery short-circuit and other damag e to your
vehicle, Toyota recommends using “Toyota Genuine Traction Battery
Coolant” or similar high-quality ethylene glycol-based, low electric con-
ductivity coolant, non-amine and non-borate coolant with azole additives.
Toyota cannot guarantee that th e use of a product other than “Toyota
Genuine Traction Battery Cool ant” will prevent risks of battery short-circuit
or other damage.
Never use water as it will cause damage.
Do not reuse coolant that has been removed from the radiator.
Heater system
Capacity4.2 qt. (4.0 L, 3.5 Imp. qt.)
Coolant type
Use either of the following:
• “Toyota Super Long Life Coolant”
• Similar high-quality ethylene glycol- based non-silicate , non-amine, non-
nitrite, and non-borate coolant with long-
life hybrid organic acid technology
Do not use plain water alone.
Electrical system ( 12-volt battery)
Specific voltage reading at
68°F (20°C):
12.0 V or More
In the case the voltage is less than stan-
dard, charge battery.
(Voltage is checked 20 minutes after the
motor and all lights turned off.)
Charging rates5 A max.

5609-1. Specifications
Owners Manual_USA_M42C01_enheat buildup and possible tire fail- ure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pres-
sureTire pressure when the vehicle has been parked
for three hours or more, or has not been driven
more than 1 mile or 1.5 km under that condition
Maximum inflation pres-
sureThe maximum cold inflated pressure to which a
tire may be inflated, shown on the sidewall of
the tire
Recommended inflation
pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in
excess of those stan-
dard items which may be replaced) of transmis-
sion, power steering, power brakes, power
windows, power seats, radio and heater, to the
extent that these items are available as factory-
installed equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard
equipment, including th e maximum capacity of
traction battery and coolant, and if so equipped,
air conditioning and additional weight optional
traction motor
Maximum loaded vehicle
weight
The sum of:
(a) Curb weight
(b) Accessory weight
(c) Vehicle capacity weight
(d) Production options weight
Normal occupant weight
150 lb. (68 kg) times the number of occupants
specified in the second column of Table 1
* that
follows
Occupant distributionDistribution of occupant s in a vehicle as speci-
fied in the third column of Table 1
* below

598Alphabetical Index
Owners Manual_USA_M42C01_en
Front seat concentrated airflow mode (S-FLOW) ................. 408
Remote Air Conditioning System ........................................... 409
“SYNC” mode ....................... 406
Automatic door locking and unlocking systems ............... 171
Automatic High Beam (AHB) . 250
Automatic light control system ............................................... 248
Auxiliary box lights ................ 415
Auxiliary boxes ....................... 420
Average power consumption 157
Average vehicle speed........... 158
B
Back door ................................ 172 Hands Free Power Back Door........................................... 177
Power back door .................. 175
Wireless remote control 164, 175
Back-up lights Replacing light bulbs ............ 502
Battery (12-volt battery) If the 12-volt battery is dis-charged .............................. 541
Preparing and c hecking before
winter.................................. 393
Replacing ............................. 544
Warning light ........................ 513
Battery (traction battery) ......... 72 Charging....................... 105, 113
Location.................................. 72
Specification ......................... 552
Traction battery cooler............ 99
Traction battery heater ........... 99
Warning messages............... 140
Battery Electric Vehicle driving tips ........................................... 81
Blind Spot Monitor (BSM) ...... 302 Enabling/disabling the system........................................... 303 Bottle holders .........................420
Brake
Brake Hold ............................246
Fluid......................................554
Parking brake .......................243
Regenerative braking .............73
Warning light.........................513
Brake assist ............................387 Brake Hold ............................246
Brake Override System ..........220
Break-in tips ............................220
Brightness control Instrument panel light control155
BSM (Blind Spot Monitor) ......302 Enabling/disabling the system...........................................303C
Camera Digital Rear-view Mirror ........206
Front camera ........................260
Toyota Teammate Advanced Park ....................................352
Card holders ...........................420
Care Aluminum wheels .................449
Brake calipers.......................449
Exterior .................................448
Interior ..................................451
Seat belts .............................451
Cargo and luggage .................225
Cargo capacity ................225, 228
Cargo hooks............................421
CCID (Charging Circuit Interrupt- ing Device) ..............................89Indicator..................................90
Operation................................90
Ceintures de sécurité Comment porter votre ceinture de sécurité ..........................581
Center console light ...............415
Chains......................................395

Owners Manual_USA_M42C01_en
Alphabetical Index599
Charging ......................... 105, 113AC charging ......................... 105
AC charging cable .................. 87
Charging components ............ 85
Charging indicator .................. 90
Charging methods .................. 98
Charging procedure ..... 105, 113
Charging schedule function.. 118
Charging time may increase 104
Charging tips ........................ 100
DC charging ......................... 113
Display . 101, 121, 129, 131, 140
Information related to charging display 101, 121 , 129, 131, 140
Locking and unlocking the AC charging connector............... 93
My Room Mode .................... 129
Opening and closing the charging port lid s .................. 85
Power sources precautions .... 97
Power sources th at can be used
............................................. 96
Safety functions.............. 89, 102
Things to know before charging ........................................... 102
Warning messages............... 140
When AC charging cannot be performed ........................... 133
When charging schedule func- tion cannot be performed ... 138
When DC charging cannot be performed ........................... 135
Charging equipment ................ 85
Charging methods.................... 98 AC charging ......................... 105
DC charging ......................... 113
Charging ports Charging port lid ..................... 85
Locking and unlocking the AC charging connector............... 93
Opening and closing .............. 85
Charging schedule function .. 118 Setting ..................................121
Charging tips ..........................100
Charging-linked functions My Room Mode ......................98
Traction battery cooler ............99
Traction battery heater ...........99
Traction battery warming control.............................................99
Child restraint system ..............50 Fixed with a LATCH system ...59
Fixed with a seat belt..............54
Front passenger occupant clas-sification system ...................44
Points to remember ................50
Riding with children ................49
Types of child restraint system installation method ...............52
Using an anchor bracket ........61
Child safety ...............................49 12-volt battery precautions ...544
Airbag precautions .................39
Back door precautions..........172
Child restraint system .............52
Electronic sunshade .............427
How your child should wear the seat belt ................................30
Power window lock switch ....214
Power window precautions...213
Rear door child-protectors ....171
Seat belt extender precautions .............................................30
Seat belt precautions........29, 49
Child-protector........................171
Cleaning ..........................448, 451 Aluminum wheels .................449
Brake calipers.......................449
Digital Rear-view Mirror ........206
Exterior .................................448
Interior ..................................451
Radar sensor ........................261
Seat belts .............................451
Clock ................................152, 154