Page 55 of 464

551-1. For safe use
1
For safety and security
MIRAI_OM_USA_OM62023U
Safety information for children
●It is recommended that children sit  in the rear seats to avoid acci-
dental contact with the shift lever, wiper switch, etc.
● Use the rear door child-protector lock or the window lock switch to
avoid children opening the door while driving or operating the
power window accidentally. ( →P. 123, 154)
● Do not let small children operate equipment which may catch or
pinch body parts, such as the pow er window, hood, trunk, seats,
etc.
Observe the following precautions  when children are in the vehi-
cle.
Use a child restraint system appropriate for the child, until the
child becomes large enough to pr operly wear the vehicle’s seat
belt.
WARNING
Never leave children unattended in the vehicle, and never allow children to
have or use the key.
Children may be able to start the vehicle or shift the vehicle into neut\
ral.
There is also a danger that children may injure themselves by playing with
the windows or other features of the vehicle. In addition, heat build-up or
extremely cold temperatures inside the vehicle can be fatal to children. 
         
        
        
     
        
        Page 75 of 464

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. 
         
        
        
     
        
        Page 115 of 464
115
4
Operation of
each component
MIRAI_OM_USA_OM62023U 4-1. Key information
Keys .................................. 116
4-2. Opening, closing and  locking the doors
Doors ................................ 120
Trunk ................................. 126
Smart key system ............. 131
4-3. Adjusting the seats Front seats ........................ 138
Driving position memory ... 140
Head restraints.................. 145
4-4. Adjusting the steering  wheel and mirrors
Steering wheel .................. 147
Inside rear view mirror ...... 149
Outside rear view  mirrors ............................. 151
4-5. Opening and closing  the windows
Power windows ................. 154 
         
        
        
     
        
        Page 116 of 464
1164-1. Key information
MIRAI_OM_USA_OM62023U
Keys
The following keys are provided with the vehicle.Electronic keys
• Operating the smart key system(→P. 131)
• Operating the wireless remote control function ( →P. 116)
Mechanical keys
Key number plate
Locks all the doors ( →P. 120)
Unlocks all the doors ( →P. 120)
Pressing the button unlocks the
driver’s door. Pressing the button
again within 5 seconds unlocks the
other doors.
Opens the windows ( →P. 120)*
Opens the trunk ( →P. 126)
Sounds the alarm ( →P. 117)
*: This setting must be customized at your Toyota dealer.
The keys
Wireless remote control 
         
        
        
     
        
        Page 121 of 464

1214-2. Opening, closing and locking the doors
4
Operation of each component
MIRAI_OM_USA_OM62023U
■Operation signals
Doors: 
A buzzer sounds and the emergency flashers flash to indicate that the doors
have been locked/unlocked. (Locked: Once; Unlocked: Twice)
Windows: 
A buzzer sounds to indicate that the windows are opening.
■ Security feature
If a door is not opened within approximately 60 seconds after the vehicle is
unlocked, the security feature automatically locks the vehicle again.
■ When the door cannot be locked by th e lock sensor on the surface of the
door handle
■ Door lock buzzer
If an attempt to lock the doors is made when a door is not fully closed, a
buzzer sounds continuously for 5 seconds. Fully close the door to stop the
buzzer, and lock the doors once more.
■ Setting the alarm
Locking the doors will set the alarm system. ( →P. 74)
■ If the smart key system or the wireless remote control does not operate
properly
Use the mechanical key to lock and unlock the doors. ( →P. 398)
Replace the key battery with a new one if it is depleted. ( →P. 353)
When the door cannot be locked even if
the lock sensor on the surface of the door
handle is touched by a finger, touch the
lock sensor with the palm. 
When gloves are being worn, remove the
gloves. 
         
        
        
     
        
        Page 125 of 464

1254-2. Opening, closing and locking the doors
4
Operation of each component
MIRAI_OM_USA_OM62023U■
Conditions affecting the operation of  the smart key system or wireless
remote control
→P. 134
■ Customization
Settings (e.g. unlocking function using a key) can be changed. 
(Customizable features:  →P. 435)
WARNING
■To prevent an accident
Observe the following precautions while driving the vehicle.
Failure to do so may result in a door opening and an occupant falling out,
resulting in death or serious injury.
● Ensure that all doors are properly closed and locked.
● Do not pull the inside handle of the doors while driving.
Be especially careful for the front doors, as the doors may be opened
even if the inside lock buttons are in locked position.
● Set the rear door child-protector locks when children are seated in the rear
seats.
■ When opening or closing a door
Check the surroundings of the vehicle such as whether the vehicle is on an
incline, whether there is enough space for a door to open and whether a
strong wind is blowing. 
When opening or closing the door, hold the door handle tightly to prepare
for any unpredictable movement.
■ When using the wireless remote control and operating the power win-
dows
Operate the power window after checking to make sure that there is no pos-
sibility of any passenger having any of their body parts caught in the win-
dow. Also, do not allow children to operate the wireless remote control. It is
possible for children and other passengers to get caught in the power win-
dow. 
         
        
        
     
        
        Page 134 of 464

1344-2. Opening, closing and locking the doors
MIRAI_OM_USA_OM62023U■
Conditions affecting operation
The smart key system uses weak radio waves. In the following situations, the
communication between the electronic key and the vehicle may be affected,
preventing the smart key system, wireless remote control and immobilizer
system from operating properly. (Ways of coping:  →P. 398)
● When the electronic key battery is depleted
● Near a TV tower, electric power plant, gas station, radio station, large dis-
play, airport or other facility that generates strong radio waves or electrical
noise
● When the electronic key is in contact with, or is covered by the following
metallic objects
• Cards to which aluminum foil is attached
• Cigarette boxes that have aluminum foil inside
• Metallic wallets or bags
• Coins
• Hand warmers made of metal
• Media such as CDs and DVDs
● When other wireless keys (that emit radio waves) are being used nearby
● When carrying the electronic key together with the following devices that
emit radio waves
• Portable radio, cellular phone, cordless phone or other wireless commu-
nication devices
• Another vehicle’s electronic key or a wireless key that emits radio waves
• Personal computers or personal digital assistants (PDAs)
• Digital audio players
• Portable game systems
● If window tint with a metallic content or metallic objects are attached to the
rear window
● When the electronic key is placed near a battery charger or electronic
devices 
         
        
        
     
        
        Page 135 of 464

1354-2. Opening, closing and locking the doors
4
Operation of each component
MIRAI_OM_USA_OM62023U■
Note for the entry function
●Even when the electronic key is within the effective range (detection areas),
the system may not operate properly in the following cases:
• The electronic key is too close to the window or outside door handle, near
the ground, or in a high place when the doors are locked or unlocked.
• The electronic key is near the ground or  in a high place, or too close to
the rear bumper center when the trunk is opened.
• The electronic key is on the instrument panel, rear package tray or floor, or in the door pockets or glove box when the fuel cell system is started or
power switch modes are changed.
● Do not leave the electronic key on top of the instrument panel or near t\
he
door pockets when exiting the vehicle. Depending on the radio wave recep-
tion conditions, it may be detected by the antenna outside the cabin and the
door will become lockable from the out side, possibly trapping the electronic
key inside the vehicle.
● As long as the electronic key is within the effective range, the doors may be
locked or unlocked by anyone. However, only the doors detecting the elec-
tronic key can be used to unlock the vehicle.
● Even if the electronic key is not inside the vehicle, it may be possible to start
the fuel cell system if the electronic key is near the window.
● The doors may unlock or lock if a large amount of water splashes on the
door handle, such as in the rain or in a car wash when the electronic key is
within the effective range. (The doors will automatically be locked after
approximately 60 seconds if the doors are not opened and closed.)
● If the wireless remote control is used to lock the doors when the electronic
key is near the vehicle, there is a possibility that the door may not be
unlocked by the entry function. (Use the wireless remote control to unlock
the doors.)
● Touching the door lock or unlock sensor while wearing gloves may prevent
lock or unlock operation.
● When the lock operation is performed using the lock sensor, recognition sig-
nals will be shown up to two consecutive times. After this, no recognition
signals will be given.
● If the door handle becomes wet while the electronic key is within the effec-
tive range, the door may lock and unlock repeatedly. In this case, follow the
following correction procedures to wash the vehicle:
• Place the electronic key in a location 6 ft. (2 m) or more away from the
vehicle. (Take care to ensure that the key is not stolen.)
• Set the electronic key to battery-saving mode to disable the smart key
system. ( →P. 133)
● If the electronic key is inside the vehicle and a door handle becomes wet
during a car wash, a message may be shown on the multi-information dis-
play and a buzzer will sound outside the vehicle. To turn off the alarm, lock
all the doors.