2022 TOYOTA MIRAI fuel cap release

772-1. Fuel cell vehicle
Owners Manual_USA_M62084_en
2
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)
*

1905-2. Driving procedures
Owners Manual_USA_M62084_envehicle in frozen areas
●When the 12-volt battery terminals
are disconnected
and remain as
such in frozen areas
Operate the water release function
with the following p rocedure before-
hand to prevent water from freezing
in the system.
1 Turn the power switch to ON and
press the H
2O switch.
Check that the “A ctive Purge Mode
ON” message is displayed in the
multi-information display.
2 While depressing the brake,
press the power switch to start
the fuel cell system.
Check that the “READY” indicator
turns on.
3 Press the power switch to stop
the fuel cell system.
The water release is automatically
performed. (Longer than normal
water purge)
■Purging while parked
The water release function does not
completely prevent purging while
parked. The purge capacity while
parked changes depending on out-
side temperature and operating con-
ditions.
If the “READY” indicator continues
to remain on after water release has
been performed, w ater may be gen-
erated and purged when parked.

Owners Manual_USA_M62084_en
Alphabetical Index531
Front seats .............................. 135Adjustment ........................... 135
Cleaning ............................... 384
Correct driving posture ........... 27
Driving position memory....... 136
Head restraints ..................... 139
Memory recall function ......... 138
Power easy access system .. 136
Seat heaters ......................... 342
Seat position memory .......... 136
Seat ventilators .................... 342
Front side marker light Light switch .......................... 191
Replacing light bulbs ............ 429
Front turn signal lights .......... 182 Replacing light bulbs ............ 429
Turn signal lever ................... 182
Fuel .......................................... 203 Capacity ............................... 483
Fuel gauge ............................. 97
Refueling .............................. 203
Type ..................................... 483
Warning light ........................ 447
Fuel cell stack ..................... 74, 79 Fuel cell stack cover............. 396
Fuel cell stack coolant ........... 397 Checking .............................. 397
Preparing and c hecking before
winter.................................. 320
Fuel cell stack cover .............. 396
Fuel cell system ....................... 74 Acoustic vehicle alerting system............................................. 76
Emergency shut off system .... 87
High voltage components....... 79
If the fuel cell system will not
start .................................... 466
Overheating.......................... 477
Power switch ........................ 172
Precautions ............................ 79
Predictive efficient drive ......... 77
Starting the fuel cell system . 172 Water release .......................189
Fuel cell system indicator....102, 111
Fuel cell unit Compartment........................395
Fuel cell unit compartment cover...........................................396
Fuel cell unit compartment cover ...............................................396
Fuel cell vehicle ........................74 Charging the traction battery ..76
Driving tips..............................89
Handling hydrogen gas ..........84
Hydrogen gas .........................83
Hydrogen-related components79
Maintenance, repair, recycling, and disposal .........................75
Power output restriction ..........82
Power switch ........................172
Regenerative braking .............76
Road accident cautions ..........86
Running out of fuel .................81
Service plugs ..........................85
Sounds and vibrations ............75
Starting the system ...............172
Traction battery air intake vents .............................................88
Fuel cell vehicle driving tips....89
Fuel consumption Average fuel economy ..........101
Current fuel economy ...........101
Fuel door .................................203 Refueling ..............................203
When the fuel door cannot be opened ...............................468
Fuel economy .........................101
Fuel gauge.................................97
Fuses .......................................425
G
Garage door opene r ...............371
Gauges ......................................97

556
Owners Manual_USA_M62084_en
HYDROGEN STATION INFORMATION
Auxiliary catch lever (P.393)
Trunk opener ( P.127)
Fuel door ( P.205)
Fuel door opener ( P.205)
Hood lock release lever ( P.393)
Tire inflation pressure ( P.487)
Hydrogen tanks’
fuel capacityP.483
Fuel typeCompressed hydrogen gasP.483
Cold tire inflation
pressureP.487