stop start TOYOTA MIRAI 2020 Owners Manual (in English)

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8-1. Essential informationEmergency flashers .......... 408
If your vehicle has to be stopped in an
emergency ...................... 409
If the vehicle is trapped in rising water .................. 410
8-2. Steps to take in an emergency
If your vehicle needs to be towed ......................... 411
If you think something is wrong .............................. 417
If a warning light turns on or a warning buzzer
sounds ............................ 418
If a warning message is displayed ......................... 426
If you have a flat tire .......... 432
If the fuel cell system will not start ........................... 447
If the electronic key does not operate properly ........ 449
If the 12-volt battery is discharged ...................... 452
If your vehicle overheats ... 457
If the vehicle becomes stuck................................ 463 9-1. Specifications
Maintenance data (fuel, fluid level, etc.) ....... 466
Tire information.................. 472
9-2. Customization Customizable features ....... 484
9-3. Items to initialize Items to initialize ................ 494
Reporting safety defects for U.S. owners ........................ 496
Seat belt instructions for Canadian owners
(in French)................................ 497
SRS airbag instructions for Canadian owners
(in French)................................ 499
What to do if... (Troubleshooting) ..................... 510
Alphabetical index ...................... 513
8When trouble arises9Vehicle specifications
10For owners
Index
For information regarding the equipment listed below, refer to the
“NAVIGATION SYSTEM OWNER’S MANUAL”.
• Navigation system
• Audio system• Rear view monitor system
• Hands-free system (for cellular phone)

16Pictorial index
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■Instrument panel
Power switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 186
Starting the fuel cell system/changing the modes . . . . . . . . . . P. 186
Emergency stop of the fuel cell system . . . . . . . . . . . . . . . . . . P. 409
When the fuel cell system will not start . . . . . . . . . . . . . . . . . . P. 447
Warning messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 426
Shift lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 193
Changing the shift position . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 193
Precautions against towing . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 411
Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 111
Reading the meters/adjusting the meter light . . . . . . . . . .P. 111, 113
Warning lights/indicator lights . . . . . . . . . . . . . . . . . . . . . . . . . P. 106
When the warning lights come on . . . . . . . . . . . . . . . . . . . . . . P. 418
Multi-information display . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 117
Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 117
Energy monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. 118
When a warning message or indicator is displayed . . . . . . . . . P. 426

291-1. For safe use
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For safety and security
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WARNING
Observe the following precautions.
Failure to do so may result in death or serious injury.
●Do not adjust the position of the driver’s seat while driving.
Doing so could cause the driver to lose control of the vehicle.
● Do not place a cushion between the driver or passenger and the seatback.
A cushion may prevent correct posture from being achieved, and reduce
the effectiveness of the seat belt and head restraint.
● Do not place anything under the front seats.
Objects placed under the front seats may become jammed in the s eat
tracks and stop the seat from locking in place. This may lead t o an acci-
dent and the adjustment mechanism may also be damaged.
● Always observe the legal speed limit when driving on public roads.
● When driving over long distances, take regular breaks before yo u start to
feel tired.
Also, if you feel tired or sleepy while driving, do not force y ourself to con-
tinue driving and take a break immediately.

781-3. Theft deterrent system
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Immobilizer system
The indicator flashes after the
power switch has been turned off
to indicate that the system is oper-
ating.
The indicator stops flashing after
the power switch has been turned
to ACCESSORY or ON mode to
indicate that the system has been
canceled.
The vehicle’s keys have built-in transponder chips that prevent
the fuel cell system from starting if a key has not been previ-
ously registered in the veh icle’s on-board computer.
Never leave the keys inside the vehicle when you leave the vehi-
cle.
This system is designed to help prevent vehicle theft but does
not guarantee absolute security against all vehicle thefts.

811-3. Theft deterrent system
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For safety and security
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Alar m
The alarm uses light and sound to give an alert when an intrusion is
detected.
The alarm is triggered in the following situations when the ala rm is
set:
● A locked door or trunk is unlocked or opened in any way other t han
using the entry function, wireles s remote control or mechanical key.
(The doors will lock a gain automatically.)
● The hood is opened.
Close the doors, trunk and hood,
and lock all the doors. The system
will be set automatically after 30
seconds.
The indicator changes from being
on to flashing when the system is
set.
Do one of the following to d eactivate or stop the alarm:
● Unlock the doors or open the trunk.
● Turn the power switch to ACCESSORY or ON mode, or start the
fuel cell system. (The alarm wil l be deactivated or stopped after a
few seconds.)
The alarm
Setting the alarm system
Deactivating or stopping the alarm

882. Fuel cell vehicle
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■Sounds unique to the fuel cell vehicle
Due to the design of your fuel cell vehicle, there are various relays, valves
and pumps which under normal driving conditions will produce so unds. This
is a normal characteristic of the vehicle and does not indicate a malfunction.
Furthermore, way of hearing may differ based on usage environme nt or con-
dition.
Noticeable soundsSource of the sounds
Clunking, clicking and clack-
ingOperation of relays and hydrogen tank
valves
Sounds may come from under the floor or
behind the rear seats.
(Sounds may be heard when starting the
fuel cell system.)
KnockingThe parking lock is engaged
Sounds may come from the motor
compartment.
(Sounds may be heard when press the P
position switch or stopping the fuel cell
system.)
Whooshing, squealingGas is flowing through the nozzle and
valvesSounds may come from behind the rear
seats, or from the dispenser hose/nozzle.
(Sounds may be heard when filling the
fuel.)
• High pitch sound
• Gurgle sound
• Pulsing soundOperation of the pumpsSounds may come from the motor com-
partment or under the front seats.
(In particular, sounds may be heard when
starting the fuel cell system, accelerating
from a stop, or press the H
2O switch. The
sound may be louder when in Br mode or
when the vehicle decelerates during
dynamic radar cruise control.)
Humming soundOperation of the pumps are speeding up
Sounds may come from the motor com-
partment or under the front seats.
(In particular, sounds may be heard when
accelerating or decelerating.)
Whooshing sound Operation of the hydrogen injectorSounds may come from under the front
seats or behind the rear seats.
(In particular, sounds may be heard when
starting the fuel cell system, driving at low
speeds, or charging the traction battery.)

892. Fuel cell vehicle
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Fuel cell system
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Regenerative braking
In the following situations, the vehicle generates electricity from the decelera-
tion of the vehicle while driving.
● The accelerator pedal is released while driving with the shift position in D.
● The brake pedal is depressed while driving with the shift posit ion in D.
■ Charging the traction battery
Because electricity generated by the fuel cell stack and regene rative braking
charges the traction battery, the battery does not need to be c harged from an
outside source. However, if the vehicle is left parked for a lo ng time, the trac-
tion battery will slowly discharge. For this reason, be sure to drive the vehicle
at least once every few months for at least 30 minutes or 10 mi les (16 km).
If the traction battery becomes fully discharged and you are unable to start
the fuel cell system, contact your Toyota dealer.
■ Charging the 12-volt battery
P. 454
■ Parking
Because there is no engine sound or vibration, it is easy to mistake the fuel
cell vehicle for being off when it is actually still running, as indicated by the
“READY” indicator being illuminated. For safety, make sure to a lways shift the
shift position to P and apply the parking brake when parked.
■ Maintenance, repair, recycling, and disposal
Contact your Toyota dealer regarding maintenance, repair, recyc ling, and dis-
posal. Do not dispose of the vehicle or any of its components y ourself.
• Humming sound
• High pitch soundOperation of the motor
Sounds may come from the motor com-
partment.
(In particular, sounds may be heard when
accelerating or decelerating.)
Blowing and draining soundExhaust water or air is being purgedSounds may come from the rear of the
vehicle.
May also occur periodically while parked
when it is cold to prevent freezing.
(Sounds may be heard when vehicle is
stopped, fuel cell system is stopped, park-
ing.)
Noticeable soundsSource of the sounds

922. Fuel cell vehicle
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When a certain level of impact from an accident is detected, the fuel
cell system is shut down and the system shuts out the high voltage.
Also, the fuel supply is stopped from the hydrogen tank valves. If the
emergency shut off system activates, your vehicle will not restart. To
restart the fuel cell system, contact your Toyota dealer.
A message is automatically displ ayed when a malfunction occurs in
the fuel cell system or an im proper operation is attempted.
If a warning message is shown on
the multi-information display, read
the message and follow the
instructions. ( P. 426)
Fuel cell vehicles do not have engine sounds like gasoline vehi cles.
Therefore, it makes an artificial noise at low speeds to notify pedestri-
ans and nearby vehicles that it is approaching. The sound varie s with
speed and will stop whe n the vehicle exceeds approximately 15 mp h
(25 km/h).
Emergency shut off system
Fuel cell warning message
Vehicle proximity notification system

932. Fuel cell vehicle
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Fuel cell system
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There is an air intake vent beside
the rear left seat for the purpose
of cooling the traction battery. If
the air intake vent is blocked, it
could lead to a reduction in trac-
tion battery output.
■If a warning light comes on, a warning message is displayed, or the
12-volt battery connection is disconnected
The fuel cell system may not be able to restart.
If the “READY” indicator does not come on, even when the start procedure is
repeated, contact your Toyota dealer.
■ If “Hydrogen Leakage Detected Visit Your Dealer” is displayed on the
multi-information display
A small amount of hydrogen gas may be leaking. Have the vehicle inspected
immediately at the nearest Toyota dealer.
■ If “FC System Shutdown due to Hydrogen Leakage Stop Your Vehicle in
a Safe Place and Contact Your Dealer” is displayed on the multi -informa-
tion display
● Hydrogen gas may be leaking.
When hydrogen gas is leaking or some other malfunction is detected:
P. 98
● The air conditioning system will shut off automatically.
■ Running out of fuel
When the vehicle has run out of fuel and the fuel cell system c annot be
started, refuel the vehicle until the low fuel level warning li ght (P. 420) turns
off before trying to restart. It may not be able to restart if the refueled amount
is too low (less than about 2.7 lb. [1.2 kg]).
Traction battery air intake vent

942. Fuel cell vehicle
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Fuel cell stack
●Depending on the usage environment, the fuel cell power output may
decline over the life of the vehicle. However, this will have almost no effect
on driving performance.
● In the following situations, the fuel cell power output may dec line faster than
normal driving:
• Extended use in areas with high amounts of dust
• Extended use in areas with high levels of sulfur (such as volc anoes or hot
springs).
• Extended use in areas with high concentrations of the following substances:
-Organic solvents, such as paint and thinner
-Amine-related materials such as ammonia
-Chlorinated substances such as salt air and snow-melting agent
However, upon returning to normal environment, the fuel cell po wer output
will recover over time.
• Salt water gets into the air cleaner filter It is recommended to replace the air cleaner filter and clean t he surround-
ing components. Have the vehicle inspected at your Toyota deale r
• The number of times the fuel cell system is started and stoppe d is exces-
sively high
• Extended use in freezing temperatures
■ Hydrogen tanks
●The hydrogen tanks are the high-pressure storage containers that are filled
with compressed hydrogen gas. The vehicle can be refueled at hy drogen
stations.
● The hydrogen tanks have an expiration date. Vehicles with expir ed hydro-
gen tanks must not be driven or refueled until the hydrogen tanks are
replaced. The expiration date is written on the inside of the fuel door. Con-
sult your Toyota dealer.
● When disposing of the hydrogen tanks or the hydrogen tank valve s, consult
your Toyota dealer for details.