2023 TOYOTA MIRAI maintenance

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Owners Manual_USA_M62064_en
Pictorial indexSearch by illustration
For safety
and securityMake sure to read through them
(Main topics: Child seat, theft deterrent system)
Fuel cell system
Fuel cell electric vehicle characteristics,
precautions, etc.
(Main topics: Fuel cell system)
Vehicle status
information and
indicatorsReading driving-related information
(Main topics: Meters, multi-information display)
Before driving
Opening and closing the doors and windows,
adjustment before driving
(Main topics: Keys, doors, seats)
Driving
Operations and advice which are necessary for
driving
(Main topics: Starting f uel cell system, refueling)
Interior featuresUsage of the interior features
(Main topics: Air conditioner, storage features)
Maintenance
and careCaring for your vehicle and maintenance
procedures
(Main topics: Interior and exterior, light bulbs)
When trouble
arisesWhat to do in case of malfunction and emergency
(Main topics: Battery discharge, flat tire)
Vehicle
specificationsVehicle specifications, customizable features
(Main topics: Fuel, oil, tire inflation pressure)
For ownersReporting safety defects for U.S. owners, seat belt
and SRS airbag instructions for Canadian owners
IndexSearch by symptom
Search alphabetically

4TABLE OF CONTENTS
Owners Manual_USA_M62064_en
Parking Support Brake func-tion (pedestrians rear of the
vehicle) ........................ 291
Toyota Teammate Advanced Park ............................. 293
Driving mode select switch .................................... 320
Snow mode ................... 321
Driving assist systems .. 322
5-6. Driving tips Winter driving tips ......... 327
6-1. Using the air conditioning
system and defogger
ALL AUTO control ......... 332
Automatic air conditioning system (Type A) .......... 333
Automatic air conditioning system (Type B) .......... 340
Rear automatic air condition- ing system ................... 349
Heated steering wheel/seat heaters/seat ventilators 351
6-2. Using the interior lights Interior lights list ............ 355
6-3. Using the storage features List of storage features . 358
Trunk features ............... 361
6-4. Using the other interior fea- tures
Electronic sunshade...... 363
Other interior features ... 364
Garage door opener...... 3827-1. Maintenance and care
Cleaning and protecting the vehicle exterior ............ 392
Cleaning and protecting the vehicle interior ............. 396
7-2. Maintenance Maintenance requirements.................................... 400
General maintenance .... 401
7-3. Do-it-yourself maintenance Do-it-yourself service precau-tions ............................. 404
Hood .............................. 406
Positioning a floor jack .. 406
Fuel cell unit compartment .................................... 408
12-volt battery................ 413
Tires .............................. 416
Replacing the tire .......... 424
Tire inflation pressure .... 428
Wheels .......................... 430
Air conditioning filter ...... 432
Cleaning the traction battery air intake vents ............ 433
Electronic key battery .... 436
Checking and replacing fuses .................................... 438
Headlight aim ................ 442
Light bulbs ..................... 443
6Interior features
7Maintenance and care

5TABLE OF CONTENTS
Owners Manual_USA_M62064_en
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8-1. Essential information Emergency flashers ...... 446
If your vehicle has to be stopped in an emergency.................................... 446
If the vehicle is submerged or water on the road is rising.................................... 447
8-2. Steps to take in an emer- gency
If your vehicle needs to be towed........................... 449
If you think something is wrong .......................... 453
If a warning light turns on or a warning buzzer sounds 454
If a warning message is dis- played.......................... 464
If you have a flat tire...... 467
If the fuel cell system will not
start ............................. 480
If you lose your keys ..... 481
If the fuel door cannot be opened ........................ 482
If the electronic key does not operate properly .......... 482
If the 12-volt battery is dis- charged ....................... 485
If your vehicle overheats 490
If the vehicle becomes stuck .................................... 4949-1. Specifications
Maintenance data (fuel, fluid level, etc.) .................... 496
Tire information ............. 502
9-2. Customization Customizable features... 512
9-3. Initialization Items to initialize ............ 526
10-1.For owners Reporting safet y defects for
U.S. owners ................. 528
Reporting safet y defects for
Canadian owners ........ 528
Seat belt instructions for Canadian owners (in
French) ........................ 529
SRS airbag instructions for Canadian owners (in
French) ........................ 530
Headlight aim instructions for Canadian owners (in
French) ........................ 537
What to do if... (Troubleshoot- ing) .............................. 540
Alphabetical Index ......... 543
8When trouble arises9Vehicle specifications
10For owners
Index

701-4. Theft deterrent system
Owners Manual_USA_M62064_en
1-4.Theft deterrent system
The indicator light flashes after
the power switch has been
turned off to indicate that the
system is operating.
The indicator light stops flashing
after the power switch has been
turned to ACC or ON to indicate
that the system has been can-
celed.
■System maintenance
The vehicle has a maintenance-free
type immobilizer system.
■Conditions that may cause the
system to malfunction
●If the grip portion of the key is in
contact with a metallic object
●If the key is in close proximity to or
touching a key to the security sys-
tem (key with a built-in transpon-
der chip) of another vehicle
■Certification
 P.559
Immobilizer system
The vehicle’s keys have
built-in transponder chips
that prevent the fuel cell
system from starting if a key
has not been previously
registered in the vehicle’s
on-board computer.
Never leave the keys inside
the vehicle when you leave
the vehicle.
This system is designed to
help prevent vehicle theft
but does not guarantee
absolute security against all
vehicle thefts.
Operating the system
NOTICE
■To ensure the system oper-
ates correctly
Do not modify or remove the sys-
tem. If modified or removed, the
proper operation of the system
cannot be guaranteed.

721-4. Theft deterrent system
Owners Manual_USA_M62064_en
For Canada: Unlock the doors
or trunk using the entry func-
tion or wireless remote con-
trol.
 Turn the power switch to ACC
or ON, or start the fuel cell
system. (The alarm will be
deactivated or stopped after a
few seconds.)
■System maintenance
The vehicle has a maintenance-free
type alarm system.
■Triggering of the alarm
The alarm may be triggered in the
following situations:
(Stopping the alarm deactivates the
alarm system.)
●For Canada: The doors are
unlocked using the mechanical
key.
●For Canada: The trunk is opened
using the mechanical key.
●A person inside the vehicle opens
a door, the trunk or hood, or
unlocks the vehicle.
●The 12-volt battery is recharged or
replaced when the vehicle is
locked. ( P.487)
■Alarm-operated door lock
In the following cases, depending
on the situation, the door may auto-
matically lock to prevent improper
entry into the vehicle:
●When a person remaining in the
vehicle unlocks the door and the
alarm is activated.
●While the alarm i s activated, a
person remaining in the vehicle
unlocks the door.
■Customization
Some functions can be customized.
(  P.512)
NOTICE
■To ensure the system oper-
ates correctly
Do not modify or remove the sys-
tem. If modified or removed, the
proper operation of the system
cannot be guaranteed.

782-1. Fuel cell electric vehicle
Owners Manual_USA_M62064_en
■Maintenance, repair, recycling,
and disposal
Contact your Toyota dealer regard-
ing maintenance, repair, recycling,
and disposal. Do not dispose of the
vehicle or any of its components
yourself.
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.169)
As there are no engine sounds
and the vehicle is quiet, opera-
tion noises unique to fuel cell
electric vehicle components
may be heard. ( P.77)
■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 ba
ttery becomes fully
discharged and yo u are unable to
start the fuel cell system, contact
your Toyota dealer.
■Charging the 12-volt battery
 P.487
■Sounds and vibrations specific
to a fuel cell e lectric vehicle
Because there is no engine sound
or vibration, it is easy to mistake the
fuel cell electric vehicle for being off
when it is actually still running, as
indicated by the “READY” indicator
being 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.180)
Operation noises ( P.77),
purge process ( P.182), 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.210)
Driving the vehicle
Fuel cell system
Fuel filling

842-1. Fuel cell electric vehicle
Owners Manual_USA_M62064_enhydrogen 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 st
ack 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 inst alled 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. Thi s may be desir-
able, for instance, before parking
in a garage. This is done by press-
ing the H
2O switch. ( P.196)
●On cold days, water vapor in the
exhaust may appe ar 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 fa il to accelerate or
even decelerate, even though the
accelerator pedal is depressed. If a
safe driving speed cannot be main-
tained, stop the ve hicle 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 retu rn 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.

872-1. Fuel cell electric vehicle
Owners Manual_USA_M62064_en
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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.