hydrogen TOYOTA MIRAI 2016 1.G User Guide

892. Fuel cell vehicle
2
Fuel cell system
MIRAI_OM_USA_OM62004U■
Hydrogen Gas Characteristics
●Hydrogen gas ignites more easily than gasoline. However, it is lighter than
air and disperses quickly. So even if hydrogen were to leak from the system,
it would quickly dilute until it is no longer flammable.
● As with gasoline and natural gas, hydrogen gas is not dangerous if it is han-
dled properly. Thoroughly read and underst and the characteristics shown in
the table below.
Hydrogen gas
LPG
(Liquid Petroleum Gas)
Gasoline
Normal stateGaseous
(Lighter than air)Gaseous
(Heavier than air)
Volatile liquid
(evaporates
easily)
(Heavier than air)
Ease of
ignitionEasier than
gasolineAt the same level
as gasoline—
Ease of
accumulation
• Disperses
upward and is
diluted to safe
concentrations
in open air
• Does not adhere to
clothing
• Spreads on the
ground or floor
• Does not adhere to
clothing• Spreads on the ground or floor
• Adheres to clothing
Detectability
•Due to itscolorless and
odorless state,
difficult to detect
by sight or smell
• Vehicle
hydrogen
detectors will
display a
warning on the
multi-
information
display
• Detectable byodor and gas
leaking noise• Detectable by color and odor

902. Fuel cell vehicle
MIRAI_OM_USA_OM62004U■
Basic concepts of hydrogen safety
●Prevent leakage
The pipe joints of the hydrogen pipelines are designed to prevent leaks.
The joints are checked for gas leakage at every official vehicle inspection.
● Detect to stop leakage
• The vehicle is equipped with hydrogen detectors. If the hydrogen detec-
tors detect a leak, the hydrogen tank valves automatically close to pre-
vent more hydrogen from escaping.
• The vehicle is equipped with a collision sensor. If the collision sensor
detects a collision, the hydrogen tank valves automatically close to pre-
vent hydrogen gas from leaking from any damaged components.
● Disperse the leaked hydrogen gas
The hydrogen tanks and pipelines are located outside of the passenger
compartment, so any leaked gas will disperse into the atmosphere by
design.
● Eliminate sources of fire
No source of fire is located near the hydrogen pipelines by design.
WARNING
■ Hydrogen-related components
●Never alter, customize, or disassemble any hydrogen-related parts.
● The hydrogen tanks, fuel cell stack, hydrogen pipelines, and connecting
components are filled with hydrogen gas. Do not remove or disassemble
these parts. Doing so can cause a hydrogen gas leak, resulting in fire or
explosion of the vehicle, which may result in death or serious injury.
■ When hydrogen gas leak or ot her malfunction is detected
● If you notice gas leaking noises or any other malfunction, immediately stop
the vehicle in a safe, well-ventilated place.
● If a warning message is shown on the multi-information display, immedi-
ately stop the vehicle in a safe, well-ventilated place.
● If a large amount of hydrogen gas leaking is noticed, turn off the power
switch, exit the vehicle, and stay far away from it. Display warning signs
and keep sources of fire away from the vehicle. If possible, get assistance.
When the above is done, immediately contact your Toyota dealer.

922. Fuel cell vehicle
MIRAI_OM_USA_OM62004U
WARNING
■Precautions in case of an accident
In the event of an accident, observe the following precautions. Failure to do
so can cause fire or electric shocks, resulting in death or serious injury.
●Stop the vehicle in a safe place to prevent subsequent accidents. Shift the
shift position to P and apply the parking brake.
● Check for hydrogen gas leakage.
Hydrogen leaks will cause a warning message to be shown on the multi-
information display. Larger leaks may also be audible.
● If a large amount of hydrogen gas leaking is noticed, turn off the power
switch, exit the vehicle, and stay far away from it. Display warning signs
and keep sources of fire away from the vehicle. If possible, get assistance.
When the above is done, immediately contact your Toyota dealer.
● Do not touch the high-voltage parts, cables (orange), or connectors.
● If electric wires are exposed inside or outside your vehicle, an electric
shock may occur. Never touch exposed electric wires.
● If a fluid leak occurs, do not touch the fluid as it may be the strong alkaline
electrolyte from the traction battery. If it comes into contact with your skin
or eyes, wash it off immediately with a large amount of water, and seek
immediate medical attention.
● If a vehicle fire occurs, extinguish it with a Class A, B, or C fire extin-
guisher. If using water, apply a large amount from a hydrant.
● In case of a vehicle fire, the hydrogen gas in the hydrogen tanks is
released via the hydrogen tank valves toward the rear of the vehicle
angled downward, in order to reduce the damage to the hydrogen tanks.
Keep away from the vehicle.
● If your vehicle needs to be towed, do so with the front wheels lifted. If the
wheels are touching the ground, the electric motor (traction motor) may
continue to generate electricity. This may cause a fire.

993. Instrument cluster
3
Instrument cluster
MIRAI_OM_USA_OM62004U
Warning lights inform the driver of malfunctions in the indicated vehi-
cle’s systems.
Warning lights
*1
Hydrogen leak warning
light ( P. 369)*1
Slip indicator ( P. 370)
*1
Brake system warning
light (P. 369)Parking brake warning
light (P. 371)
*1
Charging system
warning light ( P. 369)Open door warning light
(P. 371)
*1High coolant
temperature warning
light ( P. 369)Low fuel level warning
light (P. 371)
*1
Brake system warning
light (P. 369)Driver’s and front
passenger’s seat belt
reminder light ( P. 3 7 1 )
*1
SRS warning light
(P. 370)*1
Master warning light
(P. 371)
*1
ABS warning light
(P. 370)*1
Tire pressure warning
light ( P. 371)
*1
(Red/
Ye l l o w )
Electric power steering
system warning light
( P. 370)*3Brake Override System/
Drive-Start Control
warning light ( P. 372)
*1, 2
PCS warning light
(P. 370)

1023. Instrument cluster
MIRAI_OM_USA_OM62004U
Gauges and meters
Main display
Displays the speedometer, fuel gauge, etc. (P. 102)
Multi-information display
Presents the driver with a variety of vehicle data.
Displays warning messages in case of a malfunction. ( P. 376)
Shift position indicator
Displays the selected shift position. (P. 179)
Clock
P. 280
Fuel gauge
Displays the quantity of fuel
remaining in the hydrogen
tanks.
Main display
1
2
3
4
1

1033. Instrument cluster
3
Instrument cluster
MIRAI_OM_USA_OM62004U
ECO MODE indicator and POWER MODE indicator
Displays the selected driving mode.
(P. 181)
Power restriction indicator
Blue: The fuel cell system output power is restricted, because the
coolant temperature is low.
Amber: The fuel cell system output power is restricted, because the
coolant temperature is high.
Outside temperature
Displays the outside temperature within the range of -40°F (-40°C)
to 122°F (50°C).
Low outside temperature indicator flashes when the ambient temper-
ature is 37°F (3°C) or lower.
Driving range distance
Displays the estimated maximum distance that can be driven with
the quantity of fuel remaining. • This distance is computed based on your average fuel consump-
tion. As a result, the actual distance that can be driven may differ
from that displayed.
• When only a small amount of fuel is added to the hydrogen tanks, the display may not be updated.
Speedometer
Displays the vehicle speed.
Odometer and trip meter
Odometer:
Displays the total distance the vehicle has been driven.
Trip meter:
Displays the distance the vehicle has been driven since the meter
was last reset.
Trip meters “A” and “B” can be used to record and display different
distances independently.
Distance after start:
Displays the distance driven after the fuel cell system was started.
Blank:
A blank is displayed.
2
3
4
5
6
7

1765-2. Driving procedures
MIRAI_OM_USA_OM62004U■
Parking in cold temperatures
●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 pipe-
lines, etc., from freezing while parked during cold temperatures.
● It is normal to hear hissing and other sounds during purge. ( P. 80)
● The H
2O indicator on the meter will illuminate during purge.
● Before storing the vehicle for extended periods of time in a location with
freezing temperatures, perform a cold-weather manual purge:
Turn the power switch to ON mode and press the H
2O switch.
Check that the H
2O indicator on the meter turns on.
While depressing the brake, press the power switch to start the fuel cell
system.
Check that the “READY” indicator turns on.
Press the power switch to stop the fuel cell system.
The water release is automatically performed. During water purge, the
H
2O indicator turns on. (Longer than normal water purge)
■ Conditions affecting operation
P. 134
■ Notes for the entry function
P. 135
■ If the fuel cell system does not start
●The immobilizer system may not have been deactivated. ( P. 72)
Contact your Toyota dealer.
● Check that the shift position is P. ( P. 179)
The fuel cell system cannot be started when the shift position is N.
If P position is not selected, “Shift to P position to start” will be displayed on
the multi-information display.
● Check that the fuel door is closed.
When the fuel door is open, the fuel cell system cannot be started.
Close the fuel door before starting the system. ( P. 201)
■ If “Smart Entry & Start System malfunction See owner’s manual” is dis-
played on the multi-information display
The system may be malfunctioning. Have the vehicle inspected by your
Toyota dealer immediately.
■ If the “READY” indicator does not come on
In the event that the “READY” indicator does not come on even after perform-
ing the proper procedures for starting the vehicle, contact your Toyota dealer
immediately.
■ If the fuel cell system is malfunctioning
P. 376
1
2
3

1985-4. Refueling
MIRAI_OM_USA_OM62004U
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 fuel at a H35 dis-
penser.
A hydrogen station with a H70 dispenser (supply pressure of 10150 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 gas only at hydrogen stations.
● Fuel at hydrogen stations conforming 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 Entune,
www.toyota.com
, or call 800-331-4331.
● Observe any notices or instructio ns shown 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. 8 6 )
Consult your Toyota dealer.
Before filling

1995-4. Refueling
5
Driving
MIRAI_OM_USA_OM62004U
WARNING
■When filling
Observe the following precautions while fueling the vehicle.
Failure to do so may result in death or serious injury.
●Turn the power switch off before fueling.
● Ensure the hydrogen gas nozzle is locked onto the vehicle receptacle
before filling. This can be done by pulling on the hydrogen gas nozzle to
check that it cannot be pulled off.
Failure to do so may result in injury or damage to the hydrogen gas nozzle
or vehicle.
● Do not smoke while fueling.
● Because the fuel is cold, the hydrogen gas nozzle and vehicle receptacle
surface will become cold, and frost may develop. After fueling is com-
pleted, remove the hydrogen gas nozzle by the plastic handle only. Do not
touch any other parts of the hydrogen gas nozzle or vehicle receptacle
with bare hands immediately after f ueling, as frostbite may occur.
NOTICE
■When filling
●Fuel only with compressed hydrogen gas at stations compliant with the
Society of Automotive Engineers (SAE) J2601 fueling protocol or laws that
may supersede such SAE protocols.
If improper fuels are used, the fuel cell stack will be damaged.
● Do not swing or drop the hydrogen gas nozzle, or subject it to a large
amount of force. Doing so may cause damage.
● If the hydrogen gas nozzle cannot be removed after fueling, it may be fro-
zen to the vehicle receptacle. Wait for the hydrogen gas nozzle to thaw
before attempting to remove. Do not pull or rotate the hydrogen gas nozzle
forcibly. Failure to follow these precautions may cause damage.
● Be sure to replace the cap after filling. If foreign material gets in the vehicle
receptacle, it may cause damage.
● Do not put anything sharp, such as a screwdriver, blade, or any foreign
object into the mouth of the vehicle receptacle. If the vehicle receptacle is
damaged, hydrogen gas may leak during fueling.
● If you notice anything unusual about the vehicle receptacle, please notify
your Toyota dealer.
● If you notice anything unusual with the hydrogen dispenser or hydrogen
gas nozzle, please notify the hydrogen station operator. Contact informa-
tion is usually displayed on the dispenser.

2015-4. Refueling
5
Driving
MIRAI_OM_USA_OM62004U
■If “Open H2 Filler Door in a Safe Place when Vehicle is Powered OFF” is
displayed on the mult i-information display
Stop the vehicle in a safe place and press the fuel door opener switch once
more with the following procedure:
Shift the shift position to P.
Turn the power switch off.
Press the fuel door opener switch.
■ If the fuel door lock cannot be released (i.e., if it is damaged)
■ Sounds during filling
When fueling with compressed hydrogen gas, noises from gas flowing
through the hydrogen gas nozzle and hydrogen tank valves can sometimes
be heard. ( P. 80)
Replace the cap.
Turn the power switch off, remove the
trunk inner cover, and release the lock for
the fuel door by pulling the lever.
Closing the fuel door
1
2
3
1