2020 TOYOTA MIRAI maintenance

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Pictorial indexSearch by illustration
1For safety
and securityMake sure to read through them
2Fuel cell systemFuel cell vehicle characteristics, precautions, etc.
3Instrument
clusterHow to read the gauges and meters, the variety of
warning lights and indicators, etc.
4
Operation of
each
componentOpening and closing the doors and windows,
adjustment before driving, etc.
5DrivingOperations and advices which are necessary for
driving
6Interior featuresUsage of the interior features, etc.
7Maintenance
and careCaring for your vehicle and maintenance
procedures
8When trouble
arisesWhat to do in case of malfunction or emergency
9Vehicle
specificationsVehicle specifications, customizable features, etc.
10For ownersReporting safety defects for U.S. owners, and seat
belt and SRS airbag instructions for Canadian
owners
IndexSearch by symptom
Search alphabetically

TABLE OF CONTENTS4
MIRAI_OM_USA_OM62073U6-1. Using the air conditioning
system and defogger
Automatic air conditioning system............................. 306
Heated steering wheel/ seat heaters .................... 315
6-2. Using the interior lights Interior lights list ................ 317• Interior lights ................. 318
• Personal lights .............. 318
6-3. Using the storage features List of storage features...... 320• Glove box...................... 321
• Console box .................. 321
• Cup holders .................. 322
• Bottle holders ................ 324
• Auxiliary box ................. 324
Trunk features ................... 325
6-4. Other interior features Other interior features ....... 327• Sun visors ..................... 327
• Vanity mirrors................ 327
• Clock ............................. 328
• Armrest ......................... 329
• Coat hooks.................... 329
• Assist grips ................... 330
• Power outlet .................. 331
• USB charging ports....... 332
• Wireless charger ........... 334
Garage door opener .......... 343 7-1. Maintenance and care
Cleaning and protecting the vehicle exterior .......... 352
Cleaning and protecting the vehicle interior ........... 356
7-2. Maintenance Maintenance requirements ................... 359
General maintenance ........ 361
7-3. Do-it-yourself maintenance
Do-it-yourself service precautions ...................... 364
Hood .................................. 366
Positioning a floor jack....... 367
Motor compartment ........... 369
12-volt battery .................... 374
Tires................................... 378
Replacing the tire............... 386
Tire inflation pressure ........ 393
Wheels............................... 396
Air conditioning filter .......... 398
Electronic key battery ........ 400
Checking and replacing fuses ................................ 402
Light bulbs ......................... 405
6Interior features7Maintenance and care

5
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1
9 8 6 5
4
3
2
10
7
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)

791-3. Theft deterrent system
1
For safety and security
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■System maintenance
The vehicle has a maintenance-free type immobilizer system.
■ Conditions that may cause the system to malfunction
●If the grip portion of the key is in contact with a metallic ob ject
● If the key is in close proximity to or touching a key registered to the security
system (key with a built-in transponder chip) of another vehicle
■ Certification for the immobilizer system
For U.S.A.
l

821-3. Theft deterrent system
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■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
In the following cases, depending on the situation, the door ma y automatically
lock to prevent improper entry into the vehicle:
● 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.
● When recharging or replacing the 12-volt battery
●
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. 454)
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.

892. Fuel cell vehicle
2
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

952. Fuel cell vehicle
2
Fuel cell system
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Fuel cell stack coolant
●Fuel cell stack coolant uses a specifically-designed fluid with high electrical
insulation properties, in order to safely cool the high-voltage fuel cell stack.
● Never add water or other coolants to the fuel cell stack coolin g system, as
they will cause permanent damage.
● Consult your Toyota dealer for replenishing or changing the fue l cell stack
coolant.
■ Ion filter
●An ion filter is installed in the coolant lines for the fuel ce ll stack, in order to
maintain the normal insulation properties of the coolant.
● It is necessary to periodically change the ion filter. ( P. 428) Contact your
Toyota dealer for this periodic maintenance.
■ Tailpipe
●When the power switch is turned off and the fuel cell system is stopped
( P. 187) after driving, exhaust water is discharged. Be careful w hen stand-
ing behind the vehicle to avoid dripping or spraying.
● It is possible to manually purge the exhaust. This may be desirable, for
instance, before parking in a garage. This is done by pressing the H
2O
switch. ( P. 187)
● On cold days, water vapor in the exhaust may appear as a white mist emit-
ted from the tailpipe. This is not a malfunction.
● If the tailpipe is blocked, the fuel cell system will stop.
■ Hydrogen detectors
When the power switch is turned to ON mode, the hydrogen detect ors are
activated.

992. Fuel cell vehicle
2
Fuel cell system
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WARNING
■Tailpipe
● Do not directly touch the water or steam coming out of the tail pipe. Doing
so may cause low-temperature burns.
● The fuel cell vehicle generates water during power generation. The gener-
ated water discharged from the tailpipe is not suitable for dri nking. Never
drink the water coming out of the tailpipe.
● You may notice a strange odor from the tailpipe for a while aft er the pur-
chase of a new vehicle or after an extended period of non-use, but this is
not a malfunction. Also, the odor is harmless but it may be unpleasant, so
do not breathe in the exhaust.
■ High-voltage and high-temperature precautions
This vehicle is equipped with a high-voltage system. Follow the instructions
below as high-voltages can cause severe burns and electric shock that may
result in death or serious injury.
● Never touch, disassemble, remove, or replace the high-voltage p arts,
cables (orange), or connectors.
● The components inside the motor compartment will become hot dur ing
operation. Be careful of both the high-voltage and high-tempera ture, and
always obey the warning labels on the vehicle.
● Never touch the service plugs that are
installed on the fuel cell stack and the
traction battery. The service plugs are
used to block high-voltages from the
fuel cell stack and the traction battery
during maintenance or repair at your
Toyota dealer.