Toyota Mirai (2023 year). Manual in english - page 5

P.460)

turns off before trying to restart. It

may not be able to restart if the refu-

eled amount is too low.

■

Fuel cell stack

●

Depending on the usage environ-

ment, the fuel cell power output

may decline over the life of the

vehicle. However, this will have

almost no effect on driving perfor-

mance.

●

In the following situations, the fuel

cell power output may decline

faster than normal driving:

• Extended use in areas with high

amounts of dust

• Extended use in areas with high

levels of sulfur (such as volcanoes

or hot springs).

• Extended use in areas with high

concentrations of the following

substances:

-Organic solvents, such as paint and
thinner
-Amine-related materials such as
ammonia
-Chlorinated substances such as
salt air and snow-melting agent
• Salt water gets into the air cleaner

filter

It is recommended to replace the

air cleaner filter and clean the sur-

rounding components. Have the

vehicle inspected at your Toyota

dealer

• The number of times the fuel cell

system is started and stopped is

excessively high

• Extended use in freezing tem-

peratures

• Fill fuel with impurities which do

not follow ISO-14687

■

Hydrogen tanks

●

The hydrogen tanks are the high-

pressure storage containers that

are filled with compressed hydro-

gen gas. The vehicle can be refu-

eled at hydrogen stations.

●

The hydrogen tanks have an expi-

ration date. Vehicles with expired

hydrogen tanks must not be

driven or refueled until the hydro-

gen tanks are replaced. The expi-

ration date is written on the inside

of the fuel door. Consult your Toy-

ota dealer.

●

Consult your Toyota dealer if the

2-1. Fuel cell electric vehicle

hydrogen tanks or valves need to

be disposed.

■

Fuel cell stack coolant

●

Fuel cell stack coolant uses a spe-

cifically-designed fluid with high

electrical insulation properties, in

order to safely cool the high-volt-

age fuel cell stack.

●

Never add water or other coolants

to the fuel cell stack cooling sys-

tem, as they will cause permanent

damage.

●

Consult your Toyota dealer for

replenishing or changing the fuel

cell stack coolant.

■

Ion filter

●

An ion filter is installed in the cool-

ant lines for the fuel cell stack, in

order to maintain the normal insu-

lation properties of the coolant.

●

It is necessary to periodically

change the ion filter. (

P.466)

Contact your Toyota dealer for this

periodic maintenance.

■

Tailpipe

●

When the power switch is turned

off and the fuel cell system is

stopped (



P.182) after driving,

exhaust water is discharged. Be

careful when standing behind the

vehicle to avoid dripping or spray-

ing.

●

It is possible to manually purge

the exhaust. This may be desir-

able, for instance, before parking

in a garage. This is done by press-

ing the H

O switch. (



P.196)

●

On cold days, water vapor in the

exhaust may appear as a white

mist emitted from the tailpipe. This

is not a malfunction. A white mist

may be emitted from the vehicle

side depending on the wind direc-

tion. If it is a concern, consult with

a Toyota dealer.

●

If the tailpipe is blocked, the fuel

cell system will stop.

●

In the following state when cold, a

white mist may be emitted. Water

vapor is being emitted as a sys-

tem protection and it is not a mal-

function.

• If several minutes have passed

after opening the fuel lid, such as

refueling.

• Several hours have passed after

the power switch was turned off.

■

Hydrogen detectors

When the power switch is turned to

ON, the hydrogen detectors are

activated.

■

Power output restriction

When the power output is restricted,

the vehicle may fail to accelerate or

even decelerate, even though the

accelerator pedal is depressed. If a

safe driving speed cannot be main-

tained, stop the vehicle in a safe

place away from the traffic. This

may be caused by the following con-

ditions:

●

The coolant temperature may be

too high. This can be caused by

driving conditions such as

repeated sudden acceleration and

deceleration, continuous driving

on an incline, continuous driving

at high altitudes with a high load,

etc. In such situations, “FCV sys-

tem overheated Output power

reduced” is displayed on the multi-

information display, and the power

output is restricted. Once the cool-

ant returns to normal temperature,

the power output will return to nor-

mal. (



P.464)

●

The remaining fuel may be low.

After the low fuel level warning

light comes on, the output power

will be gradually restricted in order

to extend the possible driving dis-

tance. Once getting to this point,

the remaining driving distance

possible is short. Immediately refill

the vehicle with hydrogen.

●

On cold days, the low fuel level

warning light comes on faster than

usual and the output power is

restricted.

2-1. Fuel cell electric vehicle

Fu
el

ell

sy
st

■

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 gasoline-powered vehi-

cles or home electronic

appliances.

●

Your vehicle may cause sound

interference in some third party-

produced radio parts.

■

Starting the fuel cell system in

an extremely cold environment

When the traction battery is

extremely cold (below approxi-

mately -22˚F [-30˚C]) under the

influence of outside 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 light than air

and disperses quickly. The hydrogen system and tank sufficiently 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 longer flammable.

●

As with gasoline and natural gas, hydrogen gas is not dangerous if it is

handled properly. Thoroughly read and understand the characteristics

shown in the table below.

Hydrogen gas

LPG (Liquid

Petroleum Gas)

Gasoline

Normal state

Gaseous (Lighter
than air)

Gaseous
(Heavier than air)

Volatile liquid
(evaporates eas-
ily) (Heavier than
air)

Ease of ignition

Easier than gaso-
line

At the same level
as gasoline

—

2-1. Fuel cell electric vehicle

■

Basic concepts of hydrogen

safety

●

Prevent leakage

The pipe joints of the hydrogen
pipelines are designed to prevent
leaks.
The joints are checked for gas leak-
age at every official vehicle inspec-
tion.

●

Detect to stop leakage

• The vehicle is equipped with

hydrogen detectors. If the hydro-

gen detectors detect a leak, the

hydrogen tank valves automati-

cally close to prevent more hydro-

gen from escaping.

• The vehicle is equipped with a col-

lision sensor. If the collision sen-

sor detects a collision, the

hydrogen tank valves automati-

cally close to prevent hydrogen

gas from leaking from any dam-

aged components.

●

Disperse the leaked hydrogen gas

The hydrogen tanks and pipelines
are located outside of the passenger
compartment, so any leaked gas will
disperse into the atmosphere by
design.

●

Eliminate sources of fire

No source of fire is located near the
hydrogen pipelines by design.

Ease of accumu-
lation



Disperses
upward and is
diluted to safe
concentrations
in open air



Does not
adhere to cloth-
ing



Spreads on the
ground or floor



Does not
adhere to cloth-
ing



Spreads on the
ground or floor



Adheres to
clothing

Detectability



Due to its color-
less and odor-
less state,
difficult to
detect by sight
or smell



Vehicle hydro-
gen detectors
will display a
warning on the
multi-informa-
tion display



Detectable by
odor and gas
leaking noise



Detectable by
color and odor

Hydrogen gas

LPG (Liquid

Petroleum Gas)

Gasoline

WARNING

■

Hydrogen-related compo-

nents

●

Never alter, customize, or disas-

semble any hydrogen-related

parts.

2-1. Fuel cell electric vehicle

l c

ll s

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 malfunction 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.

2-1. Fuel cell electric vehicle

WARNING

■

Road accident cautions

In the event of an accident,

observe the following precautions.

Failure to do so can cause fire or

electric shocks, resulting in death

or serious injury.

●

Stop the vehicle in 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 the 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, transfer, or modify

the traction battery. 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.

2-1. Fuel cell electric vehicle

l c

ll s

When a certain level of impact
from an accident is detected, the
fuel cell system is shut down
and the system shuts out the
high voltage.
Also, the fuel supply is stopped
from the hydrogen tank valves.
If the emergency shut off system
activates, your vehicle will not
restart. To restart the fuel cell
system, contact your Toyota
dealer.

A message is automatically dis-
played when a malfunction
occurs in the fuel cell system or
an improper operation is
attempted. (

P.464)

If a warning message is shown
on the multi-information display,
read the message and follow the
instructions.

WARNING

• The traction battery is intended

to be used exclusively with your

fuel cell electric vehicle. If the

traction battery is used outside

of your vehicle or modified in

any way, accidents, such as

electric shock, heat generation,

smoke generation, ignition,

explosion and electrolyte leak-

age may occur.

In particular, reselling or transfer-

ring the traction battery exposes

the receiving party to risks of acci-

dents as they may not be aware

of these dangers. Make sure to

inform them of the contents of this

Owner’s Manual.

●

If your vehicle is disposed with-

out the traction battery having

been removed, there is a dan-

ger of serious electric shock in

case high-voltage parts, cables,

or their connectors are touched.

(

P.82)

When disposing of your vehicle,

the traction battery must be dis-

posed by your Toyota dealer, or

a qualified service shop. If the

traction battery is not disposed

of properly, it may cause electric

shock that can result in death or

serious injury.

NOTICE

■

Traction battery

Do not carry large amounts of

water such as water cooler bottles

in the vehicle. If water spills onto

the traction battery, the battery

may be damaged. Have the vehi-

cle inspected by your Toyota

dealer.

■

Fuel cell stack coolant

Never add water or other coolants

to the fuel cell stack cooling sys-

tem, as they will cause permanent

damage.

Emergency shut off sys-
tem

Fuel cell warning mes-
sage

2-1. Fuel cell electric vehicle

■

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 the 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.

2-1. Fuel cell electric vehicle

Fu
el

ell

sy
st

Maintaining the Fuel cell System
Indicator to Eco area on the
multi-information display can
extend your driving range.
(

P.103, 108)

Drive your vehicle smoothly.
Avoid abrupt acceleration and
deceleration.
Mild acceleration and decelera-
tion can help curb wasteful fuel
consumption.

If the brakes are operated gently
and in a timely manner, a
greater amount of electrical
energy can be regenerated
when slowing down.

Repeated acceleration and
deceleration, as well as long
waits at traffic lights, will lead to

decreased fuel economy. Check
traffic reports before leaving and
avoid delays as much as possi-
ble. When driving in a con-
gested traffic situations, gently
release the brake pedal to allow
the vehicle to move forward
slightly while avoiding overuse
of the accelerator pedal. Doing
so can help control excessive
fuel consumption.

Similar to an electric vehicle, a
fuel cell electric vehicle uses the
most fuel in high output driving
such as driving on a steep uphill
or at high speeds. Moderate the
vehicle speed and maintain a
steady speed.

When using Eco drive mode, the
torque corresponding to the
accelerator pedal depression
amount can be generated more
smoothly than it is in normal
conditions. In addition, the oper-
ation of the air conditioning sys-
tem (heating/cooling) will be
minimized, improving the fuel
economy. (



P.320)



Use the air conditioning only
when necessary. Doing so

Fuel cell electric vehi-

cle driving tips

To maximize fuel economy
and range, pay attention to
the following:

Use of Fuel cell System
Indicator

Accelerator pedal/brake
pedal operation

When braking

Delays

Driving with high power
output

Using Eco drive mode

Air conditioning

2-1. Fuel cell electric vehicle

can help reduce excessive
fuel consumption.
In summer: When the ambient
temperature is high, use the
recirculated air mode. Doing
so will help to reduce the bur-
den on the air conditioning
system and reduce fuel con-
sumption as well.
In winter: Avoid excess heat-
ing. Use the seat heater (if
equipped) or steering heater
(if equipped) to minimize the
need for cabin heating
(

P.351).



Using eco air conditioning
mode, this helps curb fuel
consumption even with the air
conditioning system turned
on. (



P.334, 341)

Make sure to check the tire infla-
tion pressure frequently.
Improper tire inflation pressure
can cause poor fuel economy.
Also, as snow tires can cause
large amounts of friction, their
use on dry roads can lead to
poor fuel economy. Use tires
that are appropriate for the sea-
son.

Carrying heavy luggage will lead
to reduced fuel economy. Install-
ing a large roof rack will also

reduce fuel economy.

Checking tire inflation
pressure

Luggage

Vehicle

statu

s information an

d in
dicator

Vehicle status informa-

tion and indicators

3-1. Instrument cluster

Warning lights and indica-

tors ...............................

Gauges and meters (with 8-

inch multi-information dis-
play) .............................

Gauges and meters (With

12.3-inch multi-information
display)......................

102

Multi-information display

..................................

105

Head-up display ..........

114

Energy monitor/consump-

tion screen/air purification
screen .......................

119

3-1. Instrument cluster

3-1.Instrument cluster

For the purpose of explanation, the following illustrations display all
warning lights and indicators illuminated.

■

With 8-inch multi-information display

The units used on the meters and some indicators may differ depending on
the target region.

■

With 12.3-inch multi-information display

Warning lights and indicators

The warning lights and indicators on the instrument cluster,
center panel and outside rear view mirrors inform the driver
of the status of the vehicle’s various systems.

Instrument cluster

3-1. Instrument cluster

Vehicle

statu

s information an

d in
dicator

The units used on the meters and some indicators may differ depending on
the target region.

Warning lights inform the driver
of malfunctions in the indicated
vehicle’s systems.

Warning lights

Hydrogen leak warn-
ing light

(



(U.S.A.)

Brake system warn-
ing light

(



(Canada)

(Red)

Brake system warn-
ing light

(



(Yellow)

Brake system warn-
ing light

(



(Red)

High coolant tempera-
ture warning light
(

Fuel cell system over-
heat warning light

(

Charging system
warning light

(

SRS warning light

(

Pop Up Hood warning
light

(

(U.S.A.)

ABS warning light

(

(Canada)

ABS warning light

(

(Red)

Electric power steer-
ing system warning
light

(



(Yellow)

Electric power steer-
ing system warning
light

(



(Flashes or

illuminates)

PCS warning light

(



(Orange)

LTA indicator
(



P.457)

Intuitive parking assist
OFF indicator

(if

equipped) (



P.457)

PKSB OFF indica-
tor

(if equipped)

(



P.457)

(Flashes)

RCTA OFF indicator

(if equipped) (

P.458)

(Flashes or

illuminates)

RCD OFF indicator (if
equipped) (



P.458)

Slip indicator light

(



P.458)

Inappropriate pedal
operation warning
light

(



(Flashes)

Brake hold operated
indicator

(



(U.S.A.)

(Flashes)

Parking brake indica-
tor (



3-1. Instrument cluster

:These lights turn on when the

power switch is turned to ON to
indicate that a system check is
being performed. They will turn
off after the fuel cell system is
on, or after a few seconds. There
may be a malfunction in a sys-
tem if the light does not come on,
or turn off. Have the vehicle
inspected by your Toyota dealer.

:This light illuminates on the

multi-information display with a
message.

:Intuitive parking assist OFF indi-

cator turns on when the power
switch is turned to ON while the
Intuitive parking assist function is
on. It will turn off after a few sec-
onds.

:Refer to “Toyota Teammate

Advanced Drive OWNER’S
MANUAL” at Toyota.com.

(Canada)
(Flashes)

Parking brake indica-
tor (

