2023 TOYOTA MIRAI charging

4157-3. Do-it-yourself maintenance
Owners Manual_USA_M62064_en
7
Maintenance and care
Make sure that the 12-volt bat-
tery terminals are not corroded
and that there are no loose con-
nections, cracks, or loose
clamps. Terminals
Hold-down clamp
Check the 12-volt battery condi-
tion by indicator color. Blue: Good condition
Red: Charging is necessary.
Have the vehicle inspected
by your Toyota dealer.
Clear: Replacement is nec-
essary.
Have the 12-volt battery
checked by your Toyota
dealer.
NOTICE
■When recharging the 12-volt
battery
Never recharge the 12-volt bat-
tery while the fue l cell system is
operating. Also, be sure all acces-
sories are turned off.
Exterior
Checking the 12-volt bat-
tery condition

4558-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
■High coolant temperature warning light
■Fuel cell system overheat warning light* (warning buzzer)
*: This light illuminates on the mu lti-information display with a message.
■Charging system warning light* (warning buzzer)
*: This light illuminates on the mu lti-information display with a message.
■SRS warning light
■Pop Up Hood warning light
Warning lightDetails/Actions
(Red)
Indicates that the coolant temperature is too high
 Immediately stop the v ehicle in a safe place.
Handling method ( P.490)
Warning lightDetails/Actions
Indicates the fuel cell system has overheated
 Stop the vehicle in a safe place.
Handling method ( P.490)
Warning lightDetails/Actions
Indicates a malfunction in t he vehicle’s charging system
 Immediately stop the vehicle in a safe place and con-
tact your Toyota dealer.
Warning lightDetails/Actions
Indicates a malfunction in:
The SRS airbag system;
 The front passenger occupant classification system; or
 The seat belt pretensioner system
 Have the vehicle inspecte d by your Toyota dealer
immediately.
Warning lightDetails/Actions
Indicates that the Pop Up Hood system has operated
 The Pop Up Hood system can not be reused once it
has operated. Have it replaced by your Toyota dealer.
Indicates a malfunction in the Pop Up Hood system
 Have the vehicle inspecte d by your Toyota dealer
immediately.

4878-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
■Starting the fuel cell system
when the 12-volt battery is dis-
charged
The fuel cell system cannot be
started by push-starting.
■To prevent 12-volt battery dis-
charge
●Turn off the headlights and the
audio system while the fuel cell
system is off.
●Turn off any unnecessary electri-
cal components when the vehicle
is running at a low speed for an
extended period, such as in heavy
traffic.
■When the 12-volt battery is
removed or discharged
●Information stor ed in the ECU is
cleared. When the 12-volt battery
is depleted, have the vehicle
inspected at you r Toyota dealer.
●Some systems may require initial-
ization. ( P.526)
●If the 12-volt battery discharges, it
may not be possible to shift the
shift position to other positions.
In this case, the vehicle cannot be
towed without lifting both rear
wheels because the rear wheels will
be locked.
■When removing the 12-volt bat-
tery terminals
When the 12-volt battery terminals
are removed, the information stored
in the ECU is cleared. Before
removing the 12-volt battery termi-
nals, contact your Toyota dealer.
■Charging the 1 2-volt battery
The electricity stor ed in the 12-volt
battery will discharge gradually even
when the vehicle is not in use, due
to natural discharge and the drain-
ing effects of certain electrical appli-
ances. If the vehicle is left for a long
time, the 12-volt battery may dis-
charge, and the fuel cell system
may be unable to s tart. (The 12-volt battery recharges automatically
while the fuel cell
system is operat-
ing.)
■When recharging or replacing
the 12-volt battery
●In some cases, it may not be pos-
sible to unlock the doors using the
smart key system when the 12-
volt battery is discharged. Use the
wireless remote c ontrol or the
mechanical key to lock or unlock
the doors.
●The fuel cell system may not start
on the first attempt after the 12-
volt battery has recharged but will
start normally after the second
attempt. This is not a malfunction.
●The power switch mode is memo-
rized by the vehicle. When the 12-
volt battery is reconnected, the
system will return to the mode it
was in before the 12-volt battery
was discharged. Before discon-
necting the 12-volt battery, turn
the power switch off.
If you are unsure what mode the
power switch was in before the
12-volt battery discharged, be
especially careful when recon-
necting the 12-volt battery.
●When the 12-volt battery is recon-
nected, start the fuel cell system,
depress the brake pedal, and con-
firm that it is possible to shift into
each shift position.
●If the battery is removed or the ter-
minals disconnected without oper-
ating the water release function
during cold weather, the vehicle
may not start due to the fuel cell
system being frozen. To prevent
this, operate th e water release
function before removing the bat-
tery or disconnecting the termi-
nals. ( P.196)

4898-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
WARNING
●When working with the 12-volt
battery, always wear safety
glasses and take care not to
allow any battery fluids (acid) to
come into contact with skin,
clothing or the vehicle body.
●Do not lean over the 12-volt bat-
tery.
●In the event that battery fluid
comes into contact with the skin
or eyes, immediately wash the
affected area with water and
seek medical attention. Place a
wet sponge or cloth over the
affected area until medical
attention can be received.
●Always wash your hands after
handling the 12-volt battery sup-
port, terminals, and other bat-
tery-related parts.
●Do not allow child ren near the
12-volt battery.
■After recharging the 12-volt
battery
Have the 12-volt battery
inspected at your Toyota dealer
as soon as possible.
If the 12-volt battery is deteriorat-
ing, continued use may cause the
12-volt battery to emit a malodor-
ous gas, which may be detrimen-
tal to the health of passengers.
■When replacing the 12-volt
battery
●When the vent plug and indica-
tor are close to the hold down
clamp, the battery fluid (sulfuric
acid) may leak.
●For information regarding 12-
volt battery rep lacement, con-
tact your Toyota dealer.
●After replacing, s ecurely attach
the exhaust hose and exhaust
hole plug to the exhaust hole of
the replaced 12-volt battery. If
not properly installed, gases
(hydrogen) may leak into the
vehicle interior, and there is the
possible danger of the gas ignit-
ing and exploding.
NOTICE
■When handling jumper cables
When connecting the jumper
cables, ensure that they do not
become entangled in the cooling
fan.
■When connecting jumper
cables
Make sure to connect jumper
cables to the specified terminals
and connecting point. Failure to
do so may adversely affect the
electronic devices or damage to
them.
■To prevent damaging the
vehicle
The exclusive jump starting termi-
nal is to be used when charging
the 12-volt battery from another
vehicle in an emergency. It cannot
be used to jump start another
vehicle.

5009-1. Specifications
Owners Manual_USA_M62064_en
*: The fluid capacity is a reference quantity.If replacement is necessary, contact your Toyota dealer.
*1: Minimum pedal clearance when depressed with a force of 112 lbf (500 N, 51 kgf) while the fuel cell system is operating.
When performing the brake pedal i nspection, also be sure to check that
Electrical system (12-volt battery)
Open voltage at 68°F (20°C):
12.0 V or higher
(Turn the power switch off and turn on the
high beam headlights for 30 seconds.)
Charging rates
Quick charge
Slow charge
15 A max.
5 A max.
Transmission
Fluid capacity*5.9 qt. (5.6 L , 4.9 Imp. qt.)
Fluid typeToyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than the above type may cause ab normal
noise or vibration, or damage th e transmission of your vehicle.
Brakes
Pedal clearance*14.0 in. (102 mm) Min.
Pedal free play0.04  0.24 in. (1  6 mm)
Brake pad wear limit0.04 in. (1 mm)
Parking brake lin ing wear limit0.04 in. (1 mm)
Parking brake indicator*2
When pulling the parking brake switch for
1 to 2 seconds: comes on
When pushing the parking brake switch for
1 to 2 seconds: turns off
Fluid typeFMVSS No.116 DOT 3 or SAE J1703
FMVSS No.116 DOT 4 or SAE J1704

Owners Manual_USA_M62064_en
Alphabetical Index547
F
Flat tire .................................... 467Tire pressure warning system........................................... 418
Floor mats ................................. 26
Fluid Brake .................................... 500
Transmission ........................ 500
Washer ................................. 412
Footwell light .................... ...... 355
Front footwell lights ............... 355
Front passenger occupant clas- sification system .................... 46
Front seats .............................. 141 Adjustment ........................... 141
Cleaning ............................... 396
Correct driving posture ........... 27
Driving position memory....... 142
Head restraints ..................... 145
Memory recall function ......... 144
Power easy access system .. 142
Seat heaters ......................... 351
Seat position memory .......... 142
Seat ventilators .................... 351
Front side marker light Light switch .......................... 198
Replacing light bulbs ............ 443
Front turn signal lights .......... 190 Replacing light bulbs ............ 443
Turn signal lever ................... 190
Fuel .......................................... 210 Capacity ............................... 497
Fuel gauge ..................... 99, 102
Refueling .............................. 210
Type ..................................... 497
Warning light ........................ 460
Fuel Cell Electric Vehicle ......... 76 Charging the traction battery .. 78
Driving tips ............................. 91
Handling hydrogen gas .......... 86
Hydrogen gas ......................... 85 Hydrogen-related components81
Maintenance, repair, recycling,
and disposal .........................78
Power output restriction ..........84
Power switch ........................180
Regenerative braking .............78
Road accident cautions ..........88
Running out of fuel .................83
Service plugs ..........................87
Sounds and vibrations ............77
Starting the system ...............180
Traction battery air intake vents .............................................90
Fuel cell electric vehicle driving tips ...........................................91
Fuel cell stack .....................76, 81 Fuel cell stack cover .............409
Fuel cell stack coolant ...........410 Checking ..............................410
Preparing and checking before winter ..................................327
Fuel cell stack cover ..............409
Fuel cell system ........................76 Acoustic vehicle alerting system.............................................79
Emergency shut off system ....89
High voltage components .......81
If the fuel cell system will not start ....................................480
Overheating ..........................491
Power switch ........................180
Precautions ............................81
Predictive efficient drive..........79
Starting the fuel cell system .180
Water release .......................196
Fuel cell System Indicator ...103, 108, 118
Fuel cell unit Compartment........................408
Fuel cell unit compartment cover...........................................409

Owners Manual_USA_M62064_en
Alphabetical Index555
Theft deterrent systemAlarm ...................................... 71
Immobilizer system ................ 70
Tire inflation pre ssure............ 428
Maintenance data................. 501
Tire inflation pressure display function............................... 418
Warning light ........................ 460
Tire information ...................... 502 Glossary ............................... 506
Size ...................................... 504
Tire identification number ..... 503
Uniform Tire Quality Grading 504
Tire pressure display ............. 418
Tire pressure warning system ............................................... 418Function ............................... 418
Initializing ............................. 420
Installing tire pressure warning valves and transmitters ...... 419
Registering ID codes ............ 422
Warning light ........................ 460
Tires ......................................... 416 Chains .................................. 329
Checking .............................. 416
Emergency tire puncture repair kit........................................ 467
If you have a flat tire ............. 467
Inflation pressure.................. 428
Information ........................... 502
Replacing ............................. 424
Rotating tires ........................ 418
Size ...................................... 501
Snow tires ............................ 327
Tire inflation pressure display function............................... 418
Tire pressure warning system ........................................... 418
Warning light ........................ 460
Tools ........................................ 469
Top tether strap ........................ 62 Total load capacit
y .................496
To w i n g Dinghy towing .......................179
Emergency towing ................449
Towing eyelet........................451
Trailer towing ...... ..................179
Toyota Safety Sense 2.5 +......214 AHB (Automatic High Beam) 200
Dynamic radar cruise control with full-speed range ..........244
LTA (Lane Tracing Assist) .....230
PCS (Pre-Collisio n System) .219
RSA (Road Sign Assist) ........241
Toyota Teammate Advanced Park ........................................293Memory function ................... 311
Parallel exiting fu nction ........309
Parallel parking function .......306
Perpendicular ex iting (forward/
reverse) function.................304
Perpendicular parking (forward/ reverse) function.................301
TRAC (Traction Control) ........322
Traction battery.........................81 Charging .................................78
Location ..................................81
Specification .........................498
Traction battery air intake vents.............................................90
Traction battery air intake vents .........................................90, 433
Traction Control (TRAC) ........322
Traction motor (electric motor)76
Trailer towing ..........................179
Trip meters ......................100, 104
Trunk ........................................132 Internal trunk rele ase lever ...134
Smart key system .................133
Trunk easy closer .................134
Trunk features ......................361

556Alphabetical Index
Owners Manual_USA_M62064_en
Trunk grip ............................. 134
Trunk light............................. 134
Trunk opener main switch .... 135
Trunk opener switch ............. 133
Wireless remote control ....... 134
Trunk light ............................... 134
Turn signal lights.................... 190 Replacing light bulbs ............ 443
Turn signal lever ................... 190
U
USB charging ports................ 364
V
Vanity lights ............................ 380
Vanity mirrors ......................... 380Vanity lights .......................... 380
VDIM (Vehicle Dynamics Inte- grated Management) ............ 322
Vehicle data recording ............... 7
Vehicle Dynamics Integrated Management (VDIM) ............. 322
Vehicle identifi cation number496
Vehicle information display ... 111
Vehicle Stability Control (VSC) ............................................... 322
Ventilators (seat ventilators) . 351
VSC (Vehicle Stability Control) ............................................... 322
W
Warning buzzers Approach warning ................ 251
Brake hold ............................ 459
Brake Override System ........ 459
Brake system ....................... 454
Drive-Start Control ............... 459
Electric power steering ......... 456
Fuel cell system overheat .... 455 Hands off steering wheel warn-
ing (LTA) .............................239
High coolant temperature .....455
Hydrogen leak ......................454
Intuitive parking assist ..268, 457
LTA (Lane Tracing Assist) ...230, 234, 457
Open door ....................128, 130
Open window........................163
PCS (Pre-Collisio n System) .456
PKSB (Parking Support Brake) ...........................................457
Pre-collision braking .............219
Pre-collision warn ing ............219
RCD (Rear Camera Detection) ...........................................458
RCTA (Rear Cross Traffic Alert) ...........................................458
Rear seat reminder ...............129
Seat belt .......................460, 461
SRS airbag ...........................455
Vehicle sway warning function (LTA) ...................................240
Warning label ............................81
Warning lights ...................95, 454 ABS ......................................456
Brake hold operated indicator...........................................459
Brake Override System ........459
Brake system ........................454
Charging system ..................455
Drive-Start Control ................459
Electric power steering .........456
Fuel cell system overheat .....455
High coolant temperature .....455
Hydrogen leak ......................454
Intuitive parking assist OFF indi- cator ...................................457
Low fuel level........................460
LTA indicator .........................457
Parking brake indicator.........459