2022 TOYOTA MIRAI battery

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Owners Manual_USA_M62084_en
Pictorial indexSearch by illustration
For safety
and securityMake sure to read through them
(Main topics: Child seat, theft deterrent system)
Fuel cell systemFuel cell 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_M62084_en
6-1. Using the air conditioning
system and defogger
ALL AUTO control ......... 324
Automatic air conditioning system (vehicles with 8-inch
display) ........................ 325
Automatic air conditioning system (vehicles with 12.3-
inch display) ................ 332
Rear automatic air condition- ing system ................... 341
Heated steering wheel/seat heaters/seat ventilators 342
6-2. Using the interior lights Interior lights list ............ 346
6-3. Using the storage features List of storage features . 349
Trunk features ............... 352
6-4. Using the other interior fea- tures
Toyota multi-operation touch
(vehicle with the 12.3-inch
display) ........................ 353
Electronic sunshade...... 355
Other interior features ... 356
Garage door opener...... 371
7-1. Maintenance and care Cleaning and protecting the vehicle exterior ............ 380
Cleaning and protecting the vehicle interior ............. 3847-2. Maintenance
Maintenance requirements.................................... 387
General maintenance .... 388
7-3. Do-it-yourself maintenance Do-it-yourself service precau-tions ............................. 391
Hood .............................. 393
Positioning a floor jack .. 393
Fuel cell unit compartment .................................... 395
12-volt battery................ 400
Tires .............................. 403
Replacing the tire .......... 411
Tire inflation pressure .... 415
Wheels .......................... 417
Air conditioning filter ...... 419
Cleaning the traction battery air intake vents and filters
.................................... 420
Electronic key battery .... 423
Checking and replacing fuses .................................... 425
Headlight aim ................ 428
Light bulbs ..................... 429
8-1. Essential information Emergency flashers....... 432
If your vehicle has to be stopped in an emergency.................................... 432
If the vehicle is submerged or water on the road is rising.................................... 433
6Interior features
7Maintenance and care
8When trouble arises

5TABLE OF CONTENTS
Owners Manual_USA_M62084_en
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8-2. Steps to take in an emer- gency
If your vehicle needs to be towed........................... 435
If you think something is wrong .......................... 439
If a warning light turns on or a warning buzzer sounds 441
If a warning message is dis- played.......................... 451
If you have a flat tire...... 455
If the fuel cell system will not
start ............................. 466
If you lose your keys ..... 467
If the fuel door cannot be opened ........................ 468
If the electronic key does not operate properly .......... 468
If the 12-volt battery is dis- charged ....................... 471
If your vehicle overheats 476
If the vehicle becomes stuck .................................... 480
9-1. Specifications Maintenance data (fuel, fluid level, etc.) .................... 482
Tire information ............. 488
9-2. Customization Customizable features .. 498
9-3. Initialization Items to initialize ........... 51010-1.For owners
Reporting safet y defects for
U.S. owners ................. 512
Reporting safet y defects for
Canadian owners ........ 512
Seat belt instructions for Canadian owners (in
French) ........................ 513
SRS airbag instructions for Canadian owners (in
French) ........................ 514
Headlight aim instructions for Canadian owners (in
French) ........................ 521
What to do if... (Troubleshoot- ing) .............................. 524
Alphabetical Index ......... 527
9Vehicle specifications
10For owners
Index

711-4. Theft deterrent system
Owners Manual_USA_M62084_en
1
For safety and security
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.473)
■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.498)
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.

742-1. Fuel cell vehicle
Owners Manual_USA_M62084_en
2-1.Fuel cell vehicle
The illustration is an example for explanation and may differ from the actual
item.
Fuel cell stack
Fuel cell converter and auxiliary inverter
Hydrogen tanks
Traction battery
Electric motor (traction motor)
Fuel cell vehicle characteristics
Fuel cell vehicles efficiently use electricity, which is gener-
ated by a chemical reaction between hydrogen and oxygen in
a fuel cell stack, and electricity charged in a traction batter y
to drive the electric motor (traction motor).
The fuel is H2 (compressed hydrogen gas), so the exhaust is
only water and water vapor. As they do not release emissions
such as CO
2 (Carbon Dioxide) and NOx (Nitrogen Oxides),
fuel cell vehicles are environmentally friendly vehicles.
Fuel cell vehicle components

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

772-1. Fuel cell vehicle
Owners Manual_USA_M62084_en
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Fuel cell system
in order to warn people nearby
of the vehicle’s approach. The
sound will stop when the vehicle
speed exceeds approximately
23 mph (37 km/h).
■How to hear the warning
In the following ca ses, the acoustic
vehicle alerting system may be diffi-
cult for surrounding people to hear.
●In very noisy areas
●In the wind or the rain
Also, as the acoustic vehicle alerting
system is installed on the front of the
vehicle, it may be m ore difficult to
hear from the rear of the vehicle
compared to the front.
*: This function can only be used in
the mainland U.S.A. It cannot be
used in other states and territo-
ries, including Alaska and Hawaii.
This system operates based on
the driving situation to enhance
fuel economy. For details about
Predictive efficient drive, refer to
“NAVIGATION AND MULTIME-
DIA SYSTEM OWNER’S MAN-
UAL”.
■Predictive deceleration sup-
port
 When the vehicle approaches
to predictive deceleration sup-
port points registered in the
navigation system, the refer-
ence operation range of the ECO Accelerator Guid-
ance (
P.102) on the multi-
information display will be
turned off to encourage the
driver to reduce excessive
acceleration.
 The regenerative braking
force will be increased
according to the driving condi-
tions to more efficiently
charge the traction battery
after the accelerator pedal is
released.
■Predictive SOC* control
The following types of controls
are performed based on data
such as road information during
route guidance by the naviga-
tion system to help ensure that
the vehicle effici ently uses elec-
tricity.
 When there is a long downhill
slope along the route, the sys-
tem reduces the traction bat-
tery level before reaching the
slope to help ensure charging
capacity for regenerative
braking while traveling down-
hill.
Predictive efficient drive
(vehicles with navigation
system)
*

802-1. Fuel cell vehicle
Owners Manual_USA_M62084_en
■High-voltage and high-temperature components
The fuel cell vehicle has high-voltage components (about 650 V
maximum) such as a fuel cell stack, traction battery, power con trol
unit, fuel cell converter, high-voltage cables (which are distinguished
from low-voltage cables by their orange covers), electric motor (trac-
tion motor), etc., and high-temperature parts such as the radiator for
cooling. Pay attention to all w arning labels attached to the vehicle.
This diagram is for illustrative purposes only and may differ f rom the actual
vehicle.
Warning label
Radiator for inverter cooling
Radiator for fuel cell stack cooling
Fuel cell water pump
Fuel cell converter and auxiliary inverter
Power control unit
Cabin coolant heater
Traction battery
Service plug
Electric motor (traction motor)