2023 TOYOTA MIRAI ignition

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—

1825-2. Driving procedures
Owners Manual_USA_M62064_en
1Stop the vehicle completely.
2 Set the parking brake.
( P.191)
3 Press the P position switch.
( P.185)
Check that the shift position indica-
tor shows P and the parking brake
indicator is illuminated.
4Press the power switch.
The fuel cell system will stop, and
the meter displa y will be extin-
guished (the shift position indicator will be extinguished
a few seconds
after the meter display).
5 Release the brake pedal and
check that “ACCESSORY” or
“IGNITION ON” is not shown
on the meter.
■Stopping the fuel cell system in
cold temperatures
●When the power switch is pressed
and the fuel cell system is stopped
during cold temperatures, the time
for water purge from the tailpipe
may be longer than usual to pre-
vent liquid in the fuel cell stack
from freezing.
●If the “FCV System Purge in Prog-
ress Purge will St op Automati-
cally” is displayed in the multi-
information display, however it is
no problem to exit the vehicle.
●The water purge time may also be
long if the system is stopped
before fuel cell system warm-up is
completed.
●It is normal to hear hissing and
other sounds during purge.
(  P. 7 7 )
●It is not a problem to do refueling
operations while the system is
purging.
The purging process is carried out
automatically afte r several min-
utes and a white mist may be
emitted, however this is not a mal-
function.
■Parking the vehic le during cold
weather
●Water may automatically purge
from the tailpipe, even when the
fuel cell system is off, in order to
prevent liquid in the fuel cell stack,
hydrogen pipelines, etc., from
freezing. Also, water vapor may
be purged, but this is not malfunc-
tion.
●It is normal to hear hissing and
other sounds during purge.
WARNING
■When starting the fuel cell
system
Always start the fuel cell system
while sitting in the driver’s seat.
Do not depress the accelerator
pedal while starting the fuel cell
system under any circumstances.
Doing so may cause an accident
resulting in death or serious injury.
NOTICE
■When starting the fuel cell
system
If the fuel cell system becomes
difficult to start, have your vehicle
checked by your Toyota dealer
immediately.
■Symptoms indicating a mal-
function with the power
switch
If the power switch seems to be
operating somewh at differently
than usual, such as the switch
sticking slightly, there may be a
malfunction. Contact your Toyota
dealer immediately.
Stopping the fuel cell sys-
tem

1845-2. Driving procedures
Owners Manual_USA_M62064_en
“ACCESSORY”
“IGNITION ON”
1 OFF
The emergency flashers can be
used.
2ACC
Some electrical components such
as the audio system can be used.
“ACCESSORY” will be displayed
on the meter.
3ON
All electrical com ponents can be
used.
“IGNITION ON” will be displayed on
the meter.
■Auto power off function
If the vehicle is le ft in ACC for more
than 20 minutes or ON (with fuel cell
system not operating) for more than
an hour with the shif t position in P,
the power switch will automatically
turn off. However, this function can-
not entirely prevent the 12-volt bat-
tery discharge. Do not leave the
vehicle with the power switch in
ACC or ON for long periods of time
when the fuel cell system is not
operating.
NOTICE
■To prevent 12-volt battery dis-
charge
●Do not leave the power switch
in ACC or ON for long periods of
time without the fuel cell system
on.
●If “ACCESSORY” or “IGNITION
ON” is displayed on the meter,
the power switch is not off. Exit
the vehicle after turning the
power switch off.

548Alphabetical Index
Owners Manual_USA_M62064_en
Fuel cell unit compartment cover ............................................... 409
Fuel consumption Average fuel economy ......... 107
Current fuel economy ........... 107
Fuel door ........................... ...... 210
Refueling .............................. 210
When the fuel door cannot be opened ............................... 482
Fuel economy ......... ................ 107
Fuel gauge ........................ 99, 102
Fuses ....................................... 438
G
Garage door opener ............... 382
Gauges .............................. 99, 102
Glove box ................................ 358
Glove box light ....................... 359
H
Head restraints ....................... 145
Head-up display ..................... 114 Driving information display area........................................... 114
Driving support system display area .................................... 117
Fuel cell System Indicator .... 118
HUD (Head-up display) switch ........................................... 116
Navigation system-linked display ........................................... 114
Outside temperature ............ 114
Pop-up display ..................... 117
Settings ................................ 116
Headlights Automatic High Beam .......... 200
Light switch .......................... 198
Replacing light bulbs ............ 443
Heated steering wheel ........... 351 Heaters
Automatic air conditioning sys-tem .............................333, 340
Heated steering wheel..........351
Outside rear view mirrors ...335, 342
Seat heaters ....... ..................351
High mounted stoplight Replacing light bulbs ............443
High-voltage components .......81
Hill-start assist control...........322
Hood ........................................406 Open.....................................406
Pop Up Hood ..........................43
Hooks Coat hooks ...........................372
Retaining hooks (floor mat) ....26
Horn .........................................148
HUD (Head-up display) switch ............................................... 116
Hydrogen detecto rs..................84
Hydrogen tanks ............76, 81, 83 Capacity ...............................497
Location ............................76, 81
Hydrogen-related components81
I
Identification Vehicle ..................................496
Ignition switch (power switch) ...............................................180
Immobilizer system ..................70
Indicators ..................................97
Initialization Electronic sunshade .............363
Items to initialize ...................526
Power windows ....................162
Tire pressure w arning system
...........................................420
Inside door handle lights .......355
Inside rear view m irror ...........149