2023 TOYOTA MIRAI battery

852-1. Fuel cell electric vehicle
Owners Manual_USA_M62064_en
2
Fuel cell system
■Electromagnetic waves (EMF)
●High-voltage parts and cables in
fuel cell electric vehicles have an
electromagnetic shielding configu-
ration, and therefore emit approxi-
mately the same amount of
electromagnetic waves as con-
ventional gasoli ne-powered vehi-
cles or home electronic
appliances.
●Your vehicle may cause sound
interference in so me third party-
produced radio parts.
■Starting the fuel cell system in
an extremely col d environment
When the tracti on battery is extremely cold (below approxi-
mately -22˚F [-30˚C]) under the
influence of outsi
de temperature, it
may not be possible to start the fuel
cell system. In this case, try to start
the fuel cell system again after the
temperature of the traction battery
increases due to the outside tem-
perature increase etc.
■Traction battery
The traction battery has a limited
service life. The lifespan of the trac-
tion battery can change according to
driving style and driving conditions.
■Hydrogen Gas Characteristics
●Hydrogen gas ignites more easily than gasoline, however it is l ight than air
and disperses quickly. The hydrogen system and tank sufficientl y serve as
a counter-measure to prevent gas leaks. However, if by chance there is a
gas leak, the hydrogen gas is rapidly diluted until it is no lo nger flammable.
●As with gasoline and natural gas, hydrogen gas is not dangerous if it is
handled properly. Thoroughly rea d and understand the characteristics
shown in the table below.
Hydrogen gasLPG (Liquid
Petroleum Gas)Gasoline
Normal stateGaseous (Lighter
than air)Gaseous
(Heavier than air)
Volatile liquid
(evaporates eas-
ily) (Heavier than
air)
Ease of ignitionEasier than gaso-
lineAt the same level
as gasoline—

872-1. Fuel cell electric vehicle
Owners Manual_USA_M62064_en
2
Fuel cell system
WARNING
●The hydrogen tanks, fuel cell
stack, hydrogen pipelines, and
connecting components are
filled with hydrogen gas. Do not
remove or disassemble these
parts. Doing so can cause a
hydrogen gas leak, resulting in
fire or explosion of the vehicle,
which may result in death or
serious injury.
■When hydrogen gas leak or
other malfunctio n is detected
●If a large amount of hydrogen
gas leaking is noticed, turn off
the power switch, exit the vehi-
cle, and stay far away from it.
Display warning signs and keep
sources of fire away from the
vehicle. If possible, get assis-
tance. When the above is done,
immediately contact your Toyota
dealer.
●If you notice gas leaking or any
other malfunction, immediately
stop the vehicle in a safe and
well-ventilated place, exit the
vehicle, and stay far away from
it.
●If a warning message is dis-
played in the multi-information
display, immediately stop the
vehicle in a safe, well-ventilated
outdoor place.
■Tailpipe
●Do not directly touch the water
or steam coming out of the tail-
pipe. Doing so may cause low-
temperature burns.
●The fuel cell electric vehicle
generates water during power
generation. The generated
water discharged from the tail-
pipe is not suitable for drinking.
Never drink the water coming
out of the tailpipe.
●You may notice a strange odor
from the tailpipe for a while after
the purchase of a new vehicle
or after an extended period of
non-use, but this is not a mal-
function. Also, the odor is harm-
less but it may be unpleasant,
so do not breathe in the
exhaust.
■High-voltage and high-tem-
perature precautions
This vehicle is equipped with a
high-voltage system. Follow the
instructions below as high-volt-
ages can cause severe burns and
electric shock that may result in
death or serious injury.
●Never touch, disassemble,
remove, or replace the high-
voltage parts, cables (orange),
or connectors.
●The components inside the fuel
cell unit compartment will
become hot during operation.
Be careful of both the high-volt-
age and high-temperature, and
always obey the warning labels
on the vehicle.
●Never touch the service plug
that is installed on the traction
battery. The service plug is used
to block high-voltages coming
from the traction battery during
maintenance or repair at your
Toyota dealer.

882-1. Fuel cell electric vehicle
Owners Manual_USA_M62064_en
WARNING
■Road accident cautions
In the event of an accident,
observe the following precautions.
Failure to do so c an cause fire or
electric shocks, resulting in death
or serious injury.
●Stop the vehicle i n a safe place
to prevent subsequent acci-
dents. Shift the shift position to
P and apply the parking brake.
●Check for hydrogen gas leak-
age.
Hydrogen leaks will cause a
warning message to be shown
on the multi-information dis-
play. Larger leaks may also be
audible.
●If a large amount of hydrogen
gas leaking is noticed, turn off
the power switch, exit the vehi-
cle, and stay far away from it.
Display warning signs and keep
sources of fire away from the
vehicle. If possible, get assis-
tance. When the above is done,
immediately contact your Toyota
dealer.
●Do not touch the high-voltage
parts, cables (orange), or con-
nectors.
●If electric wires are exposed
inside or outside your vehicle,
an electric shock may occur.
Never touch exposed electric
wires.
●If a fluid leak occurs, do not
touch the fluid as it may be the
carbonate ester-based organic
electrolyte from t he traction bat-
tery. If it comes into contact with
your skin or eyes, wash it off
immediately with a large
amount of water, and seek
immediate medical attention.
●In case of a vehicle fire, the
hydrogen gas in the hydrogen
tanks is released angled down-
ward on both the right side of
the vehicle as well as the rear of
the vehicle, in order to reduce
damage to the hydrogen tanks.
Keep away from the vehicle and
do not stand on either the right
side or the rear of the vehicle.
●If a vehicle fire occurs, it can be
extinguished with a Class A, B,
or C fire extinguisher. If using
water, apply a large amount
from a hydrant.
●If your vehicle needs to be
towed, do so with the rear
wheels lifted. If the wheels are
touching the ground, the electric
motor (traction motor) may con-
tinue to generate electricity.
This may cause a fire.
■Traction battery
●Never resell, trans fer, or modify
the traction batte ry. To prevent
accidents, traction batteries that
have been removed from dis-
posed vehicle are collected
through Toyota dealers. Do not
dispose of the traction battery
yourself.
If the traction battery is not
properly collected, the following
may occur, resulting in death or
serious injury:
• The traction battery may be ille- gally disposed or dumped, and
it is hazardous to the environ-
ment. Additionally, someone
may touch a high-voltage part,
resulting in an electric shock.

902-1. Fuel cell electric vehicle
Owners Manual_USA_M62064_en
■If a warning light comes on, a
warning message is displayed,
or the 12-volt battery connec-
tion is disconnected
The fuel cell system may not be
able to restart.
If the “READY” indicator does not
come on, even when the start pro-
cedure is repeated, contact your
Toyota dealer.
There are air intake vents on
each side of the rear seatback
with the purpose of cooling the
traction battery. If the vents are
blocked, it may interfere with the
cooling of the traction battery.
If input/output of the traction battery
becomes limited and the distance
that the vehicle can be driven using
the traction motor is reduced, the
fuel economy may be reduced.
Traction battery air intake
vents
NOTICE
■Traction battery air intake
vents
●Make sure not to block the air
intake vents with anything, such
as cover, or luggage. The
input/output of t he traction bat-
tery may be restricted, leading
to a reduction in traction battery
output and a malfunction.
●Periodically clean the air intake
vents to prevent them from clog-
ging. ( P.433)
●Do not get water or foreign
materials in the air intake vents
as this may cause a short circuit
and damage the traction bat-
tery.

1033-1. Instrument cluster
Owners Manual_USA_M62064_en
3
Vehicle status information and indicators
Odometer and trip meter ( P.104)
■Displayed items when using
Advanced Drive (if equipped)
When using Advanced Drive, the
displayed items a nd their location
will differ. Refer to “Toyota Team-
mate Advanced Drive OWNER’S
MANUAL” at Toyota.com for details.
■The meters and display illumi-
nate when
The power swit ch is in ON.
■When changing driving mode
Background color of the multi-infor-
mation display is changed following
the selected driving mode. ( P.320,
321)
■Fuel cell System Indicator
Charge area
Shows regeneration
* status.
Regenerated e nergy will be used to
charge the traction battery.
Eco area
Shows that the vehicle is being
driven in an Eco-friendly manner. By
keeping the indicator needle within
Eco area, more Eco-friendly driving
can be achieved. Power area
Shows that an Eco-friendly driving
range is being exceeded (during full
power driving, etc.)
*: When used in this manual, “regen- eration” refers to the conversion of
energy created by the movement
of the vehicle into electrical
energy.
In the following situ ation, the Fuel
cell System Indicato r does not oper-
ate.
●“READY” indicator is not illumi-
nated.
●The shift position is in a range
other than D or Br mode.
■Clock settings screen
If “Clock :00” is displayed when
is selected on the multi-information
display, the system may be malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer.
■Outside temperature display
●In the following sit uations, the cor-
rect outside temperature may not
be displayed, or the display may
take longer than normal to
change.
• When stopped, or driving at low
speeds (less than 12 mph [20
km/h])
• When the outside temperature has changed suddenly (at the
entrance/exit of a garage, tunnel,
etc.)
●When “--” or “E” i s displayed, the
system may be malfunctioning.
Take your vehicle to your Toyota
dealer.
●Displays the outsi de temperature
within the range of -40°F (-40°C)
to 122°F (50°C).
●When the outside temperature is
approximately 37°F (3°C) or
lower, the indicator will flash
for approximately 10 seconds,
then stay on.

1083-1. Instrument cluster
Owners Manual_USA_M62064_en
Average fuel economy (after
refuel)
Displays the average fuel con-
sumption since the vehicle was
refueled.
■Fuel cell System Indicator
(with 8-inch multi-informa-
tion display)
Charge area
Shows regeneration* status.
Regenerated energy will be used to
charge the traction battery.
Eco area
Shows that the vehicle is being
driven in an Eco-friendly manner.
By keeping the indicator needle
with in Eco area, more Eco-friendly
driving can be achieved.
Power area
Shows that an Eco-friendly driving
range is being exceeded (during full
power driving, etc.)
*: When used in this manual, “regeneration” refers to the con-
version of energy created by the
movement of the vehicle into
electrical energy.
In the following situation, the
Fuel cell System Indicator indi-
cator does not operate. 
“READY” indicator is not illu-
minated.
 The shift position is in a range
other than D or Br mode.
■ECO Accelerator Guid-
ance/Eco Score
Displays a reference operation
range for using the accelerator
pedal according to driving condi-
tions, and a score result that
evaluates the current driving
status.
With 8-inch multi-information
display
With 12.3-inch multi-informa-
tion display
ECO Accelerator Guidance
Eco Score
 ECO Accelerator Guidance

1123-1. Instrument cluster
Owners Manual_USA_M62064_en
 (Audio settings)
Select to enable/disable
screen.
 (Vehicle information dis-
play settings)
• Display Contents
Select to set up the following items.
Energy monitor:
Select to enable/disable the Energy
monitor ( P.119)
• Drive Info Type
Select to change the drive informa-
tion type display between trip and
total. ( P. 111 ) .
• Drive Info Items
Select to set the items on the upper
and lower side of the drive informa-
tion screen from three items, aver-
age speed, distance and total time.
 Trip Summary
Select to set the i tems displayed
when the power switch is turned off.
 Pop-Up Display
Select to enable/disable pop-up
displays for each relevant system.
Multi-information display off
Select to turn the m ulti-information
display off.
To turn the multi-in formation display
on again, press any of the meter
control switches.
 Default Settings
Select to reset the meter display
settings.
■Suspension of the settings dis-
play
●In the following situations, opera-
tion of the settings display will be
temporarily suspended.
• When a warning message appears on the multi-information
display
• When the vehicle begins to move
●Settings for functions not
equipped to the vehicle are not
displayed.
●When a function is turned off, the
related settings for that function
are not selectable.
Select to display warning mes-
sages and measures to be
taken if a malfunction is
detected. ( P.464)
Displays suggestions to the
driver in the following situations.
To select a response to a dis-
played suggestion, use the
meter control switches.
■Suggestion to turn on the
headlights
If the headlight switch is in other
than or , and the vehicle
speed is 3 mph (5 km/h) or
NOTICE
■During setting up the display
To prevent 12-volt battery dis-
charge, ensure that the fuel cell
system is operating while setting
up the display features.
Warning message display
Suggestion function

1173-1. Instrument cluster
Owners Manual_USA_M62064_en
3
Vehicle status information and indicators
■Head-up display automatic
position adjustment (if
equipped)
If the display position is recorded
into memory, the head-up display
will be automatically adjusted to the
desired position. ( P.142)
■When the 12-volt battery is dis-
connected
The customize settings of the head-
up display will be reset.
Displays the operational status
of the following systems:
 LTA (Lane Tracing Assist)
( P.230)
 Dynamic radar cruise control
with full-speed range
( P.244)
Details of content displayed on the
head-up display may differ from
that displayed on the multi-informa-
tion display. For details, refer to the
explanation of each system.
Pop-up displays for the following
systems will be displayed when
necessary.
■Driving support systems
Displays a warning/sugges-
tion/advice message or the
operating state of a relevant
system.
 PCS (Pre-Colli sion System)
( P.219)
 FCTA (Front Cross Traffic
Alert)
* (if equipped)
 Parking Support Brake func-
tion (static objects front and
rear of the vehicle/static
objects around the vehicle [if
equipped]) ( P.286)
 Brake Override System
( P.170)
 Drive-Start Control ( P.175)
Details of content displayed on the
head-up display may differ from
that displayed on the multi-informa-
tion display. For details, refer to the
explanation of each system.
*: Refer to “Toyota Teammate Advanced Drive OWNER’S MAN-
UAL”.
■/ icons
These icons are linked to the
multi-information display
: Master warning icon
Displayed when a warning mes-
sage is displayed on the multi-infor-
mation display. ( P.464)
: Information icon
Displayed when a suggestion pop-
up display ( P.112) or advice pop-
up display is displayed on the multi-
NOTICE
■When changing the settings
of the head-up display
To prevent 12-volt battery dis-
charge, ensure that the fuel cell
system is operating while the
changing the settings of the head-
up display.
Driving support system
display area
Pop-up display