battery TOYOTA MIRAI 2017 1.G Owners Manual

TABLE OF CONTENTS4
MIRAI_OM_USA_OM62023U6-1. Using the air conditioning
system and defogger
Automatic air conditioning system............................. 258
Heated steering wheel/ seat heaters .................... 267
6-2. Using the interior lights Interior lights list ................ 269• Interior lights ................. 270
• Personal lights .............. 270
6-3. Using the storage features List of storage features...... 272• Glove box...................... 273
• Console box .................. 273
• Cup holders .................. 274
• Bottle holders ................ 276
• Auxiliary box ................. 276
Trunk features ................... 277
6-4. Other interior features Other interior features ....... 279• Sun visors ..................... 279
• Vanity mirrors................ 279
• Clock ............................. 280
• Armrest ......................... 281
• Coat hooks.................... 281
• Assist grips ................... 282
• Power outlet .................. 283
• Wireless charger ........... 284
Garage door opener .......... 292
Safety Connect.................. 299 7-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 306
Cleaning and protecting the vehicle interior ........... 310
7-2. Maintenance Maintenance requirements ................... 313
General maintenance ........ 315
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions ...................... 318
Hood .................................. 320
Positioning a floor jack....... 321
Motor compartment ........... 323
12-volt battery .................... 328
Tires................................... 332
Replacing the tire............... 339
Tire inflation pressure ........ 346
Wheels............................... 349
Air conditioning filter .......... 351
Electronic key battery ........ 353
Checking and replacing fuses ................................ 355
Light bulbs ......................... 358
6Interior features7Maintenance and care

5
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8-1. Essential informationEmergency flashers .......... 360
If your vehicle has to be stopped in an
emergency ...................... 361
8-2. Steps to take in an emergency
If your vehicle needs to be towed ......................... 362
If you think something is wrong .............................. 368
If a warning light turns on or a warning buzzer
sounds ............................ 369
If a warning message is displayed ......................... 376
If you have a flat tire .......... 381
If the fuel cell system will not start ........................... 396
If the electronic key does not operate properly ........ 398
If the 12-volt battery is discharged ...................... 401
If your vehicle overheats ........................ 406
If the vehicle becomes stuck................................ 412 9-1. Specifications
Maintenance data (fuel, fluid level, etc.) ....... 416
Tire information.................. 422
9-2. Customization Customizable features ....... 434
9-3. Items to initialize Items to initialize ................ 442
Reporting safety defects for U.S. owners ........................ 444
What to do if... (Troubleshooting) ..................... 446
Alphabetical index ...................... 449
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

8
MIRAI_OM_USA_OM62023UYour Toyota is equipped with several sophisticated computers that will record
certain data, such as:
• Electric motor speed (traction motor speed)
• Accelerator status
• Brake status
• Vehicle speed
• Shift position
• Traction battery status
The recorded data varies according to the vehicle grade level and options
with which it is equipped. Furthermore, these computers do not record con-
versations, sounds or pictures.
●Data usage
Toyota may use the data recorded in these computers to diagnose malfunc-
tions, conduct research and development, and improve quality.
Toyota will not disclose the recorded data to a third party except:
• With the consent of the vehicle owner or with the consent of the lessee if the vehicle is leased
• In response to an official request by the police, a court of law or a govern-
ment agency
• For use by Toyota in a lawsuit
• For research purposes where the data is not tied to a specific vehicle or
vehicle owner
●Usage of data collected through Safety Connect (U.S.mainland only)
If your Toyota has Safety Connect and if you have subscribed to those ser-
vices, please refer to the Safety Connect Telematics Subscription Service
Agreement for information on data collected and its usage.
Vehicle data recordings

751-2. Theft deterrent system
1
For safety and security
MIRAI_OM_USA_OM62023U
■System maintenance
The vehicle has a maintenance-free type alarm system.
■ Items to check before locking the vehicle
To prevent unexpected triggering of the alarm and vehicle theft, make sure of
the following:
●Nobody is in the vehicle.
● The windows are closed before the alarm is set.
● No valuables or other personal items are left in the vehicle.
■ Triggering of the alarm
The alarm may be triggered in the following situations:
(Stopping the alarm deactivates the alarm system.)
■ Alarm-operated door lock
The door automatically locks when the following occurs:
●When a person remaining in the vehicle unlocks the door and the alarm is
activated.
● While the alarm is activated, a person remaining in the vehicle unlocks the
door.
●
A person inside the vehicle opens a
door, the trunk or hood, or unlocks the
vehicle using an inside lock button.
● The 12-volt battery is recharged or
replaced when the vehicle is locked.
(→P. 403)
NOTICE
■ To ensure the system operates correctly
Do not modify or remove the system. If modified or removed, the proper
operation of the system cannot be guaranteed.

782. Fuel cell vehicle
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Fuel cell vehicle characteristics
This diagram is for illustrative purposes only and may differ from the
actual vehicle.
Fuel cell vehicles efficiently use electricity, which is generated
by a chemical reaction between hydrogen and oxygen in a fuel
cell stack, and electricity charged in a traction battery to drive
the electric motor (traction motor).
The fuel is H
2 (compressed hydrogen gas), so the exhaust is
only water and water vapor. As they do not release emissions
such as CO
2 (Carbon Dioxide) and NOx (Nitrogen Oxides), fuel
cell vehicles are environm entally friendly vehicles.
Fuel cell vehicle components
Fuel cell stack
Hydrogen tanks
Traction battery Tailpipe
Fuel cell converter
Electric motor (traction motor)

802. 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 sounds. This
is a normal characteristic of the vehicle and does not indicate a malfunction.
Furthermore, way of hearing may differ based on usage environment 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.)

812. Fuel cell vehicle
2
Fuel cell system
MIRAI_OM_USA_OM62023U■
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 position in D.
■ Charging the traction battery
Because electricity generated by the fuel cell stack and regenerative braking
charges the traction battery, the battery does not need to be charged from an
outside source. However, if the vehicle is left parked for a long 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 miles (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. 403
■ 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 always 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, recycling, and dis-
posal. Do not dispose of the vehicle or any of its components yourself.
• 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

832. Fuel cell vehicle
2
Fuel cell system
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The fuel cell vehicle has high-voltage components (about 650 V maxi-
mum) such as a fuel cell stack, traction battery, power control unit,
high-voltage cables (which are distinguished from low-voltage cables
by their orange covers), electric motor (traction motor), etc., and high-
temperature parts such as the radiator for cooling. Pay attention to all
warning labels attached to the vehicle.
This diagram is for illust rative purposes only and may differ from the
actual vehicle.
High-voltage and high-temperature components
Warning label
Power control unit
High-voltage cables (orange)
Fuel cell stack
Traction battery
Service plug
Fuel cell converter Electric motor (traction motor)
Air conditioning compressor
Radiator for inverter cooling
Radiator for fuel cell stack
cooling
Auxiliary inverter
Cabin coolant heater

852. Fuel cell vehicle
2
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 warn ing 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 pro\
cedure 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. 9 0
● 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 cannot be
started, refuel the vehicle until the low fuel level warning light ( →P. 371) 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

882. Fuel cell vehicle
MIRAI_OM_USA_OM62023U■
Power output restriction
When the power output is restricted, the vehicle may fail to accelerate or even
decelerate, even though the accelerator pedal is depressed. If a safe driving
speed cannot be maintained, stop the vehicle in a safe place away from the
traffic. This may be caused by the following conditions:
●The coolant temperature may be too high. This can be caused by driving
conditions such as repeated sudden acceleration and deceleration, continu-
ous driving on an incline, continuous driving at high altitudes with a high
load, etc. In such situations, the power output restriction indicator (amber) is
displayed on the main display, “High FC Temperature Reduced Power” is
displayed on the multi-information display, and the power output is
restricted. Once the coolant returns to normal temperature, the power out-
put will return to normal. ( →P. 377)
● The remaining fuel may be low. After the low fuel warning indicator comes
on, the output power will be gradually restricted in order to extend the possi-
ble driving distance. Once getting to this point, the remaining driving dis-
tance possible is short. Immediately refill the vehicle with hydrogen.
● On cold days, the low fuel warning indicator comes on faster than usual and
the output power is restricted.
■ Vehicle proximity notification system
In the following cases, the vehicle proximity notification system may be diffi-
cult to hear for people around.
●In very noisy areas
● In wind or rain
Also, because the vehicle proximity notification system is located in the front
of the vehicle, it may be more difficult to hear from the rear of the vehicle
compared to the front.
■ Electromagnetic waves (EMF)
●High-voltage parts and cables in fuel cell vehicles have an electromagne\
tic
shielding configuration, and therefore emit approximately the same amount
of electromagnetic waves as conventional gasoline-powered vehicles or
home electronic appliances.
● Your vehicle may cause sound interference in some third party-produced
radio parts.
■ Traction battery
The traction battery has a limited service life. The lifespan of the traction bat-
tery can change according to driving style and driving conditions.