2022 TOYOTA MIRAI engine

7
Owners Manual_USA_M62084_en
Anti-lock brake system
 Vehicle dynamics integrated
management
 SRS airbag system
 Seat belt pretensioner system
Be sure to check with your Toy-
ota dealer for precautionary
measures or special instructions
regarding installation of a mobile
two-way radio system.
High voltage parts and cables
on the fuel cell vehicles emit
approximately the same amount
of electromagnetic waves as the
conventional gasoline powered
vehicles or home electronic
appliances despite of their elec-
tromagnetic shielding.
Unwanted noise may occur in
the reception of the mobile two-
way radio.
The vehicle is equipped with
sophisticated computers that will
record certain data, such as:
• Engine speed / Electric motor speed (traction motor speed)
• Accelerator status
• Brake status
• Vehicle speed
• Operation status of the driving assist systems
• Images from the cameras
Your vehicle is equipped with cam-
eras. Contact your Toyota dealer for
the location of re cording cameras.
The recorded data varies
according to the vehicle grade
level and options with which it is
equipped.
These computers do not record
conversations or sounds, and
only record images outside of
the vehicle in certain situations.
Data Transmission
Your vehicle may transmit the data
recorded in these computers to
Toyota without notification to you.
Data usage
Toyota may use the data recorded
in this computer to diagnose mal-
functions, conduct research and
development, and improve quality.
Toyota will not disclose the
recorded data to a third party
except:
• With the consen t of the vehicle
owner or with the consent of the
lessee if the vehicle is leased
• In response to an official request by the police, a court of law or a
government agency
• For use by Toyota in a lawsuit
• For research purposes where the data is not tied to a specific vehi-
cle or vehicle owner
 Recorded image information
can be erased by your Toyota
dealer.
The image recording function can
be disabled. However, if the func-
tion is disabled, data from when the
system operates will not be avail-
able.
To learn more about the vehi-
Vehicle data recording

681-3. Emergency assistance
Owners Manual_USA_M62084_en
necessary assistance required.
If you accidentally press the “SOS”
button, tell the response-center
agent that you are not experiencing
an emergency.
■Enhanced Roadside Assis-
tance
Enhanced Roadside Assistance
adds GPS data to the already
included warranty-based Toyota
roadside service.
Subscribers can press the
“SOS” button to reach a Safety
Connect response-center agent,
who can help with a wide range
of needs, such as: towing, flat
tire, fuel delivery, etc. For a
description of the Roadside
Assistance services and their
limitations, please see the
Safety Connect Terms and Con-
ditions, which are available at
Toyota.com.
Important! Read this informa-
tion about exposure to radio fre-
quency signals before using
Safety Connect;
The Safety Connect system
installed in your vehicle is a low-
power radio transmitter and
receiver. It receives and also
sends out radio frequency (RF)
signals.
In August 1996, the Federal
Communications Commission (FCC) adopted RF exposure
guidelines with safety levels for
mobile wireless phones. Those
guidelines are consistent with
the safety standards previously
set by the following U.S. and
international standards bodies.

ANSI (American National
Standards Institute) C95.1
[1992]
 NCRP (National Council on
Radiation Protection and
Measurement) Report 86
[1986]
 ICNIRP (International Com-
mission on Non-Ionizing Radi-
ation Protection) [1996]
Those standards were based on
comprehensive and periodic
evaluations of the relevant sci-
entific literature. Over 120 scien-
tists, engineers, and physicians
from universities, and govern-
ment health agencies and
industries reviewed the avail-
able body of research to
develop the ANSI Standard
(C95.1).
The design of Safety Connect
complies with the FCC guide-
lines in addition to those stan-
dards.
Safety information for
Safety Connect

762-1. Fuel cell vehicle
Owners Manual_USA_M62084_enyourself.
The electric motor (traction
motor) allows smooth, powerful
takeoff and acceleration. This
vehicle drives similarly to a gas-
oline vehicle without any special
actions by the driver. (
P.161)
As there are no engine sounds
and the vehicle is quiet, opera-
tion noises unique to fuel cell
vehicle components may be
heard. ( P. 7 5 )
■Regenerative braking
In the following si tuations, the vehi-
cle generates electricity from the
deceleration of the vehicle while
driving.
●The accelerator pedal is released
while driving with the shift position
in D.
●The brake pedal is depressed
while driving with the shift position
in D.
■Charging the traction battery
Because electricity generated by the
fuel cell stack and regenerative
braking charges the traction battery,
the battery does not need to be
charged from an outside source.
However, if the vehicle is left parked
for a long time, the traction battery
will slowly discharge. For this rea-
son, be sure to drive the vehicle at
least once every few months for at
least 30 minutes or 10 miles (16
km).
If the traction battery becomes fully
discharged and you are unable to
start the fuel cell system, contact
your Toyota dealer.
■Charging the 12-volt battery
 P.473
■Parking
Because there is no engine sound
or vibration, it is easy to mistake the
fuel cell vehicle for being off when it
is actually still running (“READY”
indicator is illumina ted). For safety,
make sure to always shift the shift
position to P and apply the parking
brake when parked.
The system may behave differ-
ently on cold days as it may be
performing a special cold-start
process to improve the start up
performance. ( P.172)
Operation noises ( P.75),
purge process ( P.175), etc.,
may differ from usual. However,
this is not a malfunction.
Compressed hydrogen gas fuel
can be filled at hydrogen sta-
tions.
More information about hydrogen
fuel and fueling can be found in the
“Opening the fuel door” section of
this manual. ( P.203)
Fuel cell vehicles do not have
engine sounds like gasoline
vehicles. Therefore, a sound
that changes in accordance with
the driving speed, will be played
Driving the vehicle
Fuel cell system
Fuel filling
Acoustic vehicle alerting
system

1635-1. Before driving
Owners Manual_USA_M62084_en
5
Driving
WARNING
■When starting the vehicle
Always keep your foot on the
brake pedal while stopped with
the “READY” indicator is illumi-
nated. This prevents the vehicle
from creeping.
■When driving the vehicle
●Do not drive if y ou are unfamil-
iar with the location of the brake
and accelerator pedals to avoid
depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the
brake pedal will result in sudden
acceleration that may lead to an
accident.
• When backing up, you may twist your body around, leading to dif-
ficulty in operating the pedals.
Make sure to operate the pedals
properly.
• Make sure to keep a correct driving posture even when mov-
ing the vehicle only slightly. This
allows you to depress the brake
and accelerator pedals properly.
• Depress the brake pedal using your right foot. Depressing the
brake pedal using your left foot
may delay respon se in an emer-
gency, resulting in an accident.
●The driver should pay extra
attention to pedes trians as this
vehicle is powered only by an
electric motor (traction motor).
As there is no engine noise, the
pedestrians may misjudge the
vehicle’s movement. Even with
the acoustic vehicle alerting
system activate, d rive with care
as pedestrians in the vicinity
may still not notice the vehicle if
the surrounding area is noisy.
●During normal driving, do not
turn off the fuel cell system.
Turning the fuel cell system off
while driving will not cause loss
of steering or braking control,
however, power assist to the
steering will be lost. This will
make it more difficult to steer
smoothly, so you should pull
over and stop the vehicle as
soon as it is safe to do so.
In the event of a n emergency,
such as if it becomes impossible
to stop the vehicle in the normal
way:  P. 4 3 2
●Using the brakes continuously
may cause the brakes to over-
heat and lose effectiveness
when driving down a steep hill.
●Do not adjust the positions of
the steering wheel, the seat, or
the inside or outside rear view
mirrors while driving.
Doing so may result in a loss of
vehicle control.
●Always check that all passen-
gers’ arms, heads or other parts
of their body are not outside the
vehicle.
●Do not drive in excess of the
speed limit. Even if the legal
speed limit permits it, do not
drive over 85 mph (140 km/h)
unless your vehicle has high-
speed capability tires. Driving
over 85 mph (140 km/h) may
result in tire fa ilure, loss of con-
trol and possible injury. Be sure
to consult a tire dealer to deter-
mine whether the tires on your
vehicle are high-speed capabil-
ity tires or not before driving at
such speeds.
■When driving on slippery
road surfaces
●Sudden braking, acceleration
and steering may cause tire
slippage and reduce your ability
to control the vehicle.

2035-4. Refueling
Owners Manual_USA_M62084_en
5
Driving
5-4.Refueling
 Close the all the doors and
windows.
 Set the parking brake.
 Shift the shift position to P.
 Turn the power switch off.
 Turn off the headlights.
■Fuel types
 P.483
■Notes on fueling
●Fueling will not be possible if the
pressure inside the vehicle’s
hydrogen tanks is higher than the
supply pressure of the hydrogen
station. If the hydrogen tanks are
more than half full, the vehicle will
be unable to fuel at a H35 dis-
penser. A hydrogen station with a
H70 dispenser (supply pressure of
10150 psi) [70 MPa, 714 kgf/cm
2,
700 bar] is necessary to com-
pletely fill hydrogen tanks.
●If the fueling cannot be completed
due to trouble with the station
equipment, call the number indi-
cated on the equipment.
Opening the fuel door
Fuel with compressed
hydrogen gas only at hydro-
gen stations.
Fuel at hydrogen stations
conforming with the Society
of Automotive Engineers
(SAE) J2601 fueling proto-
col or laws that may super-
sede such SAE protocols.
Refer to the Mirai Station
Finder Application in Con-
nected services,
https://www.toyota.com/
connected-services/ (for
U.S. owners) or
https://www.toyota.ca/
toyota/en/about/
connected-services (for
Canadian owners), or call 1-
800-331-4331 (for U.S.
owners) or 1-888-869-6828
(for Canadian owners).
 Observe any notices or
instructions shown at hydro-
gen stations.
The filling time and amount
of fuel may depend on out-
side temperature and the
equipment at that hydrogen
station.
Vehicles with expired hydro-
gen tanks must not be used.
Check P.81 to learn how
and when to check the expi-
ration. Consult your Toyota
dealer.
Before filling
WARNING
■When filling
Observe the following precautions
while fueling the vehicle. Failure
to do so may result in death or
serious injury.

2045-4. Refueling
Owners Manual_USA_M62084_en
WARNING
●Turn the power switch off before
fueling.
●Ensure the hydrogen gas noz-
zle is locked onto the vehicle
receptacle before filling. This
can be done by pulling on the
hydrogen gas nozzle to check
that it cannot be pulled off. Fail-
ure to do so may result in injury
or damage to the hydrogen gas
nozzle or vehicle.
●Do not smoke while fueling.
●Because the fuel is cold, the
hydrogen gas nozzle and vehi-
cle receptacle surface will
become cold, and frost may
develop. After fueling is com-
pleted, remove the hydrogen
gas nozzle by the plastic handle
only. Do not touch any other
parts of the hydrogen gas noz-
zle or vehicle receptacle with
bare hands immediately after
fueling, as frostbite may occur.
●Be sure to use hydrogen gas
nozzles at 350 bar/700 bar for
passenger vehicles.
Do not use hydrogen gas noz-
zles designed for commercial
vehicles. Check the instructions
at hydrogen station or ask the
station operator for assistance.
●Only fuel the vehicle at hydro-
gen stations designed for pas-
senger vehicles. Do not fuel the
vehicle at hydrogen stations
designed for forklifts, buses, or
trucks. Ask the station operator
for assistance.
NOTICE
■When filling
●Fuel only with compressed
hydrogen gas at stations com-
pliant with the Society of Auto-
motive Engineers (SAE) J2601
fueling protocol or laws that may
supersede such SAE protocols.
If improper fuels are used, the
fuel cell stack will be damaged.
●Do not swing or drop the hydro-
gen gas nozzle, or subject it to a
large amount of force. Doing so
may cause damage.
●If the hydrogen gas nozzle can-
not be removed after fueling, it
may be frozen to the vehicle
receptacle. Wait for the hydro-
gen gas nozzle to thaw before
attempting to r emove. Do not
pull or rotate the hydrogen gas
nozzle forcibly. Failure to follow
these precautions may cause
damage.
●Be sure to replace the cap after
filling. If foreign ma terial gets in
the vehicle receptacle, it may
cause damage.
●Do not put anything sharp, such
as a screwdriver, blade, or any
foreign object into the opening
of the vehicle receptacle. If the
vehicle receptacle is damaged,
hydrogen gas may leak during
fueling.
●If you notice anything unusual
about the vehicle receptacle,
please notify your Toyota
dealer.
●If you notice anything unusual
with the hydrogen dispenser or
hydrogen gas nozzle, please
notify the hydrogen station
operator. Contact information is
usually displayed on the dis-
penser.

2575-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
●Wires, fences, ropes, etc.
●Cotton, snow and other materials
that absorb sound waves
●Sharply-angled objects
●Low objects
●Tall objects with upper sections
projecting outwards in the direc-
tion of your vehicle
■Situations in which the system
may not operate properly
Certain vehicle conditions and the
surrounding environment may affect
the ability of a sensor to correctly
detect objects. Particular instances
where this may occur are listed
below.
●There is dirt, snow, water drops or
ice on a sensor. (Cleaning the
sensors will resolve this problem.)
●A sensor is frozen. (Thawing the
area will resolve this problem.)
In especially cold weather, if a
sensor is frozen the sensor dis-
play may be displayed abnormally,
or objects, such as a wall, may not
be detected.
●When a sensor or the area around
a sensor is extremely hot or cold.
●On an extremely bumpy road, on
an incline, on gravel, or on grass.
●When vehicle horns, vehicle
detectors, motorcycle engines, air
brakes of large vehicles, the clear-
ance sonar of other vehicles or
other devices which produce ultra-
sonic waves are near the vehicle
●A sensor is coated with a sheet of
spray or heavy rain.
●If objects draw too close to the sensor.
●When a pedestrian is wearing
clothing that does not reflect ultra-
sonic waves (ex. skirts with gath-
ers or frills).
●When objects that are not perpen-
dicular to the ground, not perpen-
dicular to the vehicle traveling
direction, uneven, or waving are in
the detection range.
●Strong wind is blowing
●When driving in inclement weather
such as fog, snow or a sandstorm
●When an object that cannot be
detected is between the vehicle
and a detected object
●If an object such as a vehicle,
motorcycle, bicycle or pedestrian
cuts in front of the
vehicle or runs
out from the side of the vehicle
●If the orientation of a sensor has
been changed due to a collision or
other impact
●When equipment that may
obstruct a sensor is installed, such
as a towing eyelet, bumper pro-
tector (an additional trim strip,
etc.), bicycle car rier, or snow plow
●If the front of the v ehicle is raised
or lowered due to the carried load
●If the vehicle cannot be driven in a
stable manner, such as when the
vehicle has been in an accident or
is malfunctioning
●When a tire chains, compact
spare tire or an emergency tire
puncture repair kit is used
■Situations in which the system
may operate even if there is no
possibility of a collision
In some situations, such as the fol-
lowing, the system may operate
even though there is no possibility of
a collision.
●When driving on a narrow road

2585-5. Using the driving support systems
Owners Manual_USA_M62084_en
●When driving toward a banner,
flag, low-hanging branch or boom
barrier (such as those used at rail-
road crossings, toll gates and
parking lots)
●When there is a rut or hole in the
surface of the road
●When driving on a metal cover
(grating), such as those used for
drainage ditches
●When driving up or down a steep
slope
●If a sensor is hit by a large amount
of water, such as when driving on
a flooded road
●There is dirt, snow, water drops or
ice on a sensor. (Cleaning the
sensors will resolve this problem.)
●A sensor is coated with a sheet of
spray or heavy rain
●When driving in inclement weather
such as fog, snow or a sandstorm
●When strong winds are blowing
●When vehicle horns, vehicle
detectors, motorcycle engines, air
brakes of large vehicles, the clear-
ance sonar of other vehicles or
other devices which produce ultra-
sonic waves are near the vehicle
●If the front of the vehicle is raised
or lowered due to the carried load
●If the orientation of a sensor has
been changed due to a collision or
other impact
●The vehicle is approaching a tall
or curved curb
●Driving close to columns (H-
shaped steel beams, etc.) in multi-
story parking garages, construc-
tion sites, etc.
●If the vehicle cannot be driven in a
stable manner, such as when the
vehicle has been in an accident or
is malfunctioning
●On an extremely bumpy road, on
an incline, on gravel, or on grass
●When a tire chains, compact
spare tire or an emergency tire
puncture repair kit is used
■Certification
 P.549