fuel type TOYOTA MIRAI 2020 Owners Manual (in English)

15Pictorial index
MIRAI_OM_USA_OM62073UWindshield wipers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 210
Precautions against winter season . . . . . . . . . . . . . . . . . . . . . P. 301
To prevent freezing (windshield wiper de-icer). . . . . . . . . . . . . P. 309
Precautions against car wash . . . . . . . . . . . . . . . . . . . . . . . . . P. 354
Fuel door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Refueling method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 213
Fuel type/hydrogen tanks’ fuel capacity . . . . . . . . . . . . . . . . . . P. 468
Tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . P. 378
Tire size/inflation pressure . . . . . . . . . . . . . . . . . . . . . . . . . P. 471
Winter tires/tire chains . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 301
Checking/rotation/tire pressur e warning system . . . . . . . . .P. 378
Coping with flat tires . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 432
Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 366
Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 366
Coping with overheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 457
Headlights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 201
Parking lights/daytime running lights . . . . . . . . . . . . . . . . . P. 201
Turn signal lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 199
Tail lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 201
License plate lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 201
Back-up lights
Shifting the shift position to R . . . . . . . . . . . . . . . . . . . . . . . . . P. 193
Side marker lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 201
Light bulbs of the exterior lights for driving
(Replacing method: P. 405)

1745-1. Before driving
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Breaking in your new Toyota
To extend the life of the vehicle, observing the following prec autions is recom-
mended:
● For the first 200 miles (300 km):
Avoid sudden stops.
● For the first 1000 miles (1600 km):
• Do not drive at extremely high speeds.
• Avoid sudden acceleration.
• Do not drive at a constant speed for extended periods.
■ Drum-in-disc type parking brake system
Your vehicle has a drum-in-disc type parking brake system. This type of brake
system needs bedding-down of the brake shoes periodically or wh enever the
parking brake shoes and/or drum are replaced. Have your Toyota dealer per-
form the bedding down operation.
■ Operating your vehicle in a foreign country
Comply with the relevant vehicle registration laws and confirm the availability
of the correct fuel. ( P. 468)

2135-4. Refueling
5
Driving
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Opening the fuel door
●Close the all the doors and windows.
● Set the parking brake.
● Shift the shift position to P.
● Turn the power switch off.
● Turn off the headlights.
■Fuel Type
Compressed hydrogen gas
■ Notes on fueling
●Fueling will not be possible if the pressure inside the vehicle ’s hydrogen tanks
is higher than the supply pressure of the hydrogen station. If the hydrogen
tanks are more than half full, the vehicle will be unable to fu el at a H35 dis-
penser.
A hydrogen station with a H70 dispenser (supply pressure of 101 50 psi
[70 MPa, 714 kgf/cm
2, 700 bar] is necessary to completely fill hydrogen tanks.
● If the fueling cannot be completed due to trouble with the station equipment,
call the number indicated on the equipment.
● Fuel with compressed hydrogen g as only at hydrogen stations.
● Fuel at hydrogen stations confor ming with the Society of Automo-
tive Engineers (SAE) J2601 fueling protocol or laws that may
supersede such SAE protocols.
● Refer to the Mirai Station Finder Application in Connected ser-
vices, https://www.toyota.com/connected-services
(for U.S. own-
ers) or https://www.toyota.ca/connected
(for Canadian owners), or
call 1-800-331-4331 (for U.S. owners) or 1-888-869-6828 (for
Canadian owners).
● Observe any notic es or instructions show n at hydrogen stations.
● The filling time and amount of fuel may depend on outside tem-
perature and the equipment at that hydrogen station.
● Vehicles with expired hydrogen tanks must not be used. ( P. 94)
Consult your Toyota dealer.
Before filling

4128-2. Steps to take in an emergency
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The following may indicate a problem with your transmission. Contact
your Toyota dealer or commercial towing service before towing.
● The fuel cell system warning message shows on the multi-informa -
tion display and the vehicle does not move.
● The vehicle makes an abnormal sound.
Do not tow with a sling-type truck
to prevent body damage.
Situations when it is necessary to contact dealers before towing
Towing with a sling-type truck
Towing with a wheel-lift type truck
From the frontFrom the rear
Release the parking brake. Us e a towing dolly under the
front wheels.

4478-2. Steps to take in an emergency
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8
When trouble arises
If the fuel cell system will not start
One of the following may be the cause of the problem:
● The electronic key may not be functioning properly. (P. 449)
● There may not be sufficient f uel in the vehicle’s tank.
Refuel the vehicle.
● The fuel door may be open. ( P. 2 1 6 )
● There may be a mal function in the immobilizer system.
(  P. 78)
● There may be a malfunction i n the shift control system.
* ( P. 429)
● The fuel cell system may be malf unctioning due to an electrical
problem such as electronic key battery depletion or a blown fus e.
However, depending on the type of malfunction, an interim mea-
sure is available to star t the fuel cell system. (P. 191, 448)
● The electronic key may be in battery-saving mode. ( P. 145)
*: It may not be possible to shift the shift position from P to a nother position.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( P. 452)
● The 12-volt battery terminal conn ections may be loose or corroded.
(  P. 374)
Reasons for the fuel cell system not starting vary depending on
the situation. Check the followi ng and perform the appropriate
procedure:
The fuel cell system will not start even though the correct sta rt-
ing procedure is being followed. ( P. 186)
The interior lights and headlights are dim, or the horn does no t
sound or sounds at a low volume.

4558-2. Steps to take in an emergency
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8
When trouble arises
●When the 12-volt battery is reconnected, start the fuel cell sy stem, depress
the brake pedal, and confirm that it is possible to shift into each shift posi-
tion.
● If the battery is removed or the terminals disconnected without operating the
water release function during cold weather, the vehicle may not start due to
the fuel cell system being frozen. To prevent this, operate the water release
function before removing the battery or disconnecting the terminals.
( P. 190)
■ When exchanging the 12-volt battery
Use a Central Degassing type 12-volt battery (Japanese Industri al Stan-
dards). Also, use 12-volt batteries with case sizes similar to one prior the
exchange and an equivalent 20 hour rate capacity (20HR) or grea ter.
• If the sizes differ, the 12-volt battery cannot be properly se cured.
• If the 20 hour rate capacity is low, even if the time period w here the vehicle
is not used is a short time, the 12-volt battery may discharge and fuel cell
system may not be able to start.
For details, consult your Toyota dealer.
WARNING
■ Avoiding 12-volt batte ry fires or explosions
Observe the following precautions to prevent accidentally ignit ing the flam-
mable gas that may be emitted from the 12-volt battery:
● Make sure each jumper cable is connected to the correct terminal and that
it is not unintentionally in contact with any other than the in tended terminal.
● Do not allow the other end of the jumper cable connected to the “+” termi-
nal to come into contact with any other parts or metal surfaces in the area,
such as brackets or unpainted metal.
● Do not allow the + and - clamps of the jumper cables to come in to contact
with each other.
● Do not smoke, use matches, cigarette lighters or allow open fla me near
the 12-volt battery.

4588-2. Steps to take in an emergency
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If the high coolant temperature warning light comes on or
flashes
Stop the vehicle in a safe place and turn off the air condition
ing sys-
tem, and then stop t he fuel cell system.
If you see steam or coolant leaks:
Carefully lift the hood after the steam subsides.
If you do not see steam or coolant leaks:
Carefully lift the hood.
After the fuel cell system has
cooled down sufficiently,
inspect the hoses and radiator
core (radiator) for any leaks.
Fuel cell stack coolant sub
radiator
Fuel cell stack coolant radia-
tor
Electric cooling fans
If a large amount of coolant leaks, immediately contact your Toyota
dealer.
NOTICE
Correction procedures
The fuel cell stack coolant is exclusive for
fuel cell stack usage. Damage may occur
when water or any other type of coolant
is used, so never use any other fluid.
If the fuel cell stack coolant is low, imme-
diately contact your Toyota dealer.
1
2
3

4689-1. Specifications
MIRAI_OM_USA_OM62073U*: This is the maximum possible fill amount. The actual fuel amount achieved
at hydrogen stations may be lower due to station capacity or station set-
tings.
Fuel
Fuel type Compressed hydrogen gas
Nominal working
pressure10150 psi (70 MPa, 714 kgf/cm2, 700 bar)
Hydrogen tanks’ fuel
capacity
(Reference)32.3 gal. (122.4 L, 26.9 Imp.gal.)
(Approximately 11.0 lb. [5 kg]
*)
Electric motor (traction motor)
Type
Permanent magnet synchronous motor
Maximum output 113 kW
Maximum torque 247 ft•lbf (335 N•m, 34.2 kgf•m)
Traction battery
TypeNickel-metal hydride battery
Voltage7.2 V/module
Capacity 6.5 Ah (3HR)
Quantity 34 modules
Overall voltage 244.8 V

4699-1. Specifications
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9
Vehicle specifications
*: The fluid capacity is a reference quantity.If replacement is necessary, contact your Toyota dealer.
Cooling system
Capacity*
Fuel cell
stack 20.7 qt. (19.6 L, 17.2 Imp.qt.)
Inverter 5.0 qt. (4.7 L, 4.1 Imp.qt.)
Coolant
type
Fuel cell
stack“Toyota Genuine FC Stack Coolant”
• In order to safely cool the fuel cell stack,
which is at high voltages, the fuel cell stack
coolant is an exclusive high insulation prod-
uct.
• Never use water or other kinds of coolants as they will cause damage.
• Coolant changes are unnecessary.
• Do not reuse coolant that has been removed from the radiator.
• Coolant is colorless.
• Consult your Toyota dealer about replenish- ing or changing the fuel cell stack coolant.
Inverter Use either of the following:
• “Toyota Super Long Life Coolant”
• A similar high-quality ethylene glycol-based
non-silicate, non-amine, non-nitrite, and
non-borate coolant with long-life hybrid
organic acid technology
Do not use plain water alone.
NOTICE
The fuel cell stack coolant is exclusive for
fuel cell stack usage. Damage may occur
when water or any other type of coolant
is used, so never use any other fluid.
If the fuel cell stack coolant is low, imme-
diately contact your Toyota dealer.

4709-1. Specifications
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*: 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 44.1 lb f (196 N,
20.0 kgf) while the fuel cell system is operating
*2: Parking brake pedal travel when depressed with a force of 67.5 lbf (300 N,
31.0 kgf).
Electrical system
12-volt battery
Open voltage at
68 F (20 C):12.6  12.8 V Fully charged
12.2  12.4 V Half charged
11 . 8  12.0 V Discharged
(Voltage checked 20 minutes after the fuel cell
system and all lights are turned off)
Charging rates5 A max.
Transmission
Fluid capacity*4.4 qt. (4.2 L, 3.7 Imp.qt.)
Fluid type Toyota Genuine ATF WS
NOTICE
■Transmission fluid type
Using transmission fluid other than “Toyota Genuine ATF WS” may ulti-
mately damage the transmission of your vehicle.
Brakes
Pedal clearance*12.95 in. (75 mm) Min.
Pedal free play 0.04  0.24 in. (1  6 mm)
Brake pad wear limit0.04 in. (1.0 mm)
Parking brake lining wear limit0.04 in. (1.0 mm)
Parking brake pedal travel*27  10 clicks
Fluid type SAE J1703 or FMVSS No.116 DOT 3, or
SAE J1704 or FMVSS No.116 DOT 4