2017 TOYOTA MIRAI battery

1103. Instrument cluster
MIRAI_OM_USA_OM62023U■
Fuel cell system indicator and ECO Score
The output power of the fuel cell system, regeneration level display,
and the ECO driving is scored and displayed.
Charge area
Shows that energy is being
recovered via the regenera-
tive brake.
Eco area
Shows that the vehicle is
being driven in an Eco-
friendly manner.
Power area
Shows that an Eco-friendly dr iving range is being exceeded.
ECO Score
Displays the driving conditions in 5 stages, which are separated
in the 3 patterns of ECO Start, ECO Cruise and ECO Stop. Also,
each time the vehicle is stopped, that number is displayed. (The
number for each take off is reset and not counted)
● By maintaining the indicator display in the ECO area or Charge
area, Eco-friendly driving is possible.
● Charge area indicates regeneration
* status. Regenerated energy
will be used to charge t he traction battery.
*: When used in this manual, “regeneration” refers to the conversion of
energy created by the movement of the vehicle into electrical energy.

1143. Instrument cluster
MIRAI_OM_USA_OM62023U
■Suspension of the settings display
In the following situations, the settings display using the meter control
switches will be suspended.
●When a warning message appears on the multi-information display
● When the vehicle begins to move
■ When the 12-volt battery terminal is disconnected and reconnected
The following data is reset when the 12-volt battery terminal is disconnected
and reconnected.
●1-minute fuel consumption
● 5-minute fuel consumption
● Driving time
● Average vehicle speed
● Average fuel consumption
■ Liquid crystal display
→P. 106
NOTICE
■During setting up the display
To prevent 12-volt battery discharge, ensure that the fuel cell system is
operating while setting up the display features.

1184-1. Key information
MIRAI_OM_USA_OM62023U■
Electronic key battery depletion
●The standard battery life is 1 to 2 years.
● If the battery becomes low, an alarm will sound in the cabin when the fuel
cell system stops. ( →P. 376)
● As the electronic key always receives radio waves, the battery will become
depleted even if the electronic key is not used. The following symptoms indi-
cate that the electronic key battery may be depleted. Replace the battery
when necessary. ( →P. 353)
• The smart key system or the wireless remote control does not operate.
• The detection area becomes smaller.
• The LED indicator on the key surface does not turn on.
● To avoid serious deterioration, do not leave the electronic key within 3 ft. (1
m) of the following electrical appl iances that produce a magnetic field:
•TVs
• Personal computers
• Cellular phones, cordless phones and battery chargers
• Recharging cellular phones or cordless phones
• Table lamps
• Induction cookers
■ Replacing the battery
→P. 353
■ Confirmation of the registered key number
The number of keys already registered to the vehicle can be confirmed. Ask
your Toyota dealer for details.
■ If a wrong key is used
The key cylinder rotates freely to isolate inside mechanism.

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.

1284-2. Opening, closing and locking the doors
MIRAI_OM_USA_OM62023U
■Tr u n k l i g h t
The trunk light turns on when the trunk is opened.
■ Function to prevent the tr unk being locked with the electronic key inside
● When all doors are locked, closing the trunk lid with the electronic key left
inside the trunk will sound an alarm.
In this case, the trunk lid can be opened by pressing the trunk release but-
ton on the trunk lid.
● If the spare electronic key is put in the trunk with all the doors locked, the
key confinement prevention function is activated so the trunk can be
opened. In order to prevent theft, take all electronic keys with you when
leaving the vehicle.
● If the electronic key is put in the trunk with all the doors locked, the key may
not be detected depending on the location of the key and the surrounding
radio wave conditions. In this case, the key confinement prevention function
cannot be activated, causing the doors to lock when the trunk is closed.
Make sure to check where the key is before closing the trunk.
● The key confinement prevention function cannot be activated if any one of
the doors is unlocked. In this case, open the trunk using the trunk opener
switch.
■ Internal trunk release lever
■ Using the mechanical key
The trunk can be also opened using the mechanical key. ( →P. 398)
■ If the smart key system or the wireless remote control does not operate
properly
Use the mechanical key to unlock the trunk. ( →P. 398)
Replace the key battery with a new one if it is depleted. ( →P. 353)
■ When leaving a key to the vehicle with a parking attendant
→P. 1 1 7
■ Customization
The trunk unlocking operation can be changed.
(Customizable features: →P. 437)
The trunk lid can be opened by pulling the
glow-in-the-dark lever located on the
inside of the trunk lid upward.
The lever will continue to glow for some
time after the trunk lid is closed.

1334-2. Opening, closing and locking the doors
4
Operation of each component
MIRAI_OM_USA_OM62023U■
When “Smart Entry & Start System Malfunction See Owner’ Manual” will
be displayed on the multi-information display
The system may be malfunctioning. Have the vehicle inspected by your Toy-
ota dealer immediately.
■ Battery-saving function
The battery-saving function will be activated in order to prevent the electronic
key battery and the 12-volt battery from being discharged while the vehicle is
not in operation for a long time.
●In the following situations, the smart key system may take some time to
unlock the doors.
• The electronic key has been left in an area of approximately 6 ft. (2 m) of
the outside of the vehicle for 10 minutes or longer.
• The smart key system has not been used for 5 days or longer.
● If the smart key system has not been used for 14 days or longer, the doors
cannot be unlocked at any doors except the driver’s door. In this case, take
hold of the driver’s door handle, or use the wireless remote control or the
mechanical key, to unlock the doors.
■ Electronic Key battery-Saving Function
When battery-saving mode is set, battery depletion is minimized by stopping
the electronic key from receiving radio waves.
Press twice while pressing and
holding . Confirm that the electronic
key indicator flashes 4 times.
While the battery-saving mode is set, the
smart key system cannot be used. To
cancel the function, press any of the elec-
tronic key buttons.

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

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.