2017 TOYOTA MIRAI key

3628-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
If your vehicle needs to be towed
In the following situations, it is not possible to be towed by another
vehicle using cables or chains, as the front wheels may be locked due
to the parking lock. Contact your Toyota dealer or commercial towing
service.
●There is a malfunction in the shift control system. ( →P. 378)
● There is a malfunction in the immobilizer system. ( →P. 72)
● There is a malfunction in the smart key system. ( →P. 398)
● The 12-volt battery is discharged. ( →P. 401)
If towing is necessary, we re commend having your vehicle
towed by your Toyota dealer or commercial towing service,
using a wheel-lift type truck or flatbed truck.
Use a safety chain system for all towing, and abide by all state/
provincial and local laws.
Situations when it is not possibl e to be towed by another vehicle

3968-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
If the fuel cell system will not start
One of the following may be the cause of the problem:
●The electronic key may not be functioning properly. ( →P. 398)
● There may not be sufficient fuel in the vehicle’s tank.
Refuel the vehicle.
● The fuel door may be open. ( →P. 201)
● There may be a malfunction in the immobilizer system.
( → P. 72)
● There may be a malfunction in the shift control system.
* (→ P. 378)
● The fuel cell system may be malf unctioning due to an electrical
problem such as electronic key ba ttery depletion or a blown fuse.
However, depending on the type of malfunction, an interim mea-
sure is available to start the fuel cell system. ( →P. 177, 397)
● The electronic key may be in battery-saving mode. ( →P. 133)
*: It may not be possible to shift the shift position from P to another position.
One of the following may be the cause of the problem:
● The 12-volt battery may be discharged. ( →P. 401)
● The 12-volt battery terminal connections may be loose or corroded.
(→ P. 328)
Reasons for the fuel cell system not starting vary depending on
the situation. Check the follo wing and perform the appropriate
procedure:
The fuel cell system will not start even though the correct start-
ing procedure is being followed. ( →P. 172)
The interior lights and headlights are dim, or the horn does not
sound or sounds at a low volume.

3988-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
If the electronic key does not operate
properly
■Doors
Use the mechanical key
(→ P. 117) in order to perform
the following operations
(driver’s door only):
Locks all doors
Unlocks the door
Turning the key rearward
unlocks the driver’s door. Turn-
ing the key once again unlocks
the other doors.
■
Tr u n k
Turn the mechanical key clock-
wise to open.
If communication between the electronic key and vehicle is
interrupted ( →P. 134) or the electronic key cannot be used
because the battery is depleted, the smart key system and wire-
less remote control cannot be used. In such cases, the doors
can be opened and the fuel cell system can be started by follow-
ing the procedure below.
Locking and unlocking the doors

3998-2. Steps to take in an emergency
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8
When trouble arises
■Key linked functions
Depress the brake pedal.
Touch the power switch with the
Toyota emblem side of the elec-
tronic key facing away from the
switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON mode.
When the smart key system is
deactivated in customization set-
ting, the power switch will turn to
ACCESSORY mode.
Firmly depress the brake pedal
and check that message is dis-
played on the multi-information
display.
Press the power switch.
In the event that the fuel cell syst em still cannot be started, contact
your Toyota dealer.
Closes the windows* (turn and hold)
Opens the windows
* (turn and hold)
*: These settings must be customized at your Toyota dealer. ( →P. 437)
Starting the fuel cell system
1
2
3
4

4008-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
■Stopping the fuel cell system
Shift the shift position to P and press the power switch as you normally do
when stopping the fuel cell system.
■ Replacing the key battery
As the above procedure is a temporary measure, it is recommended that the
electronic key battery be replaced immediately when the battery is depleted.
(→P. 353)
■ Alarm
Using the mechanical key to lock the doors will not set the alarm system.
If a door is unlocked using the mechanical key when the alarm system is set,
the alarm may be triggered. ( →P. 75)
■ When the electronic key does not work properly
●Make sure that the smart key system has not been deactivated in the cus-
tomization setting. If it is off, turn the function on.
(Customizable features →P. 436)
● Check if battery-saving mode is set. If it is set, cancel the function.
(→P. 133)
■ Changing power switch modes
Release the brake pedal and press the power switch in step above.
The fuel cell system does not start and modes will be changed each time the
switch is pressed. (→P. 174)
WARNING
■ When using the mechanical key and operating the power windows
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 mechanical key. It is possible for
children and other passengers to get caught in the power window.
3

4038-2. Steps to take in an emergency
MIRAI_OM_USA_OM62023U
8
When trouble arises
Close the exclusive jump starting terminal cover, reinstall the motor
cover and the fuse box cover to its original position.
Once the fuel cell system starts, have the vehicle inspected at your
Toyota dealer as soon as possible.
■ Starting the fuel cell system when the 12-volt battery is discharged
The fuel cell system cannot be started by push-starting.
■ To prevent 12-volt battery discharge
●Turn off the headlights and the audio system while the fuel cell system is off.
● Turn off any unnecessary electrical components when the vehicle is running
at a low speed for an extended period, such as in heavy traffic.
■ Charging the 12-volt battery
The electricity stored in the 12-volt battery will discharge gradually even when
the vehicle is not in use, due to natural discharge and the draining effects of
certain electrical appliances. If the vehicle is left for a long time, the 12-volt
battery may discharge, and the fuel cell system may be unable to start. \
(The
12-volt battery recharges automatically while the fuel cell system is operat-
ing.)
■ When the 12-volt battery is removed or discharged
●In some cases, it may not be possible to unlock the doors using the smart
key system when the 12-volt battery is discharged. Use the wireless remote
control or the mechanical key to lock or unlock the doors.
● The fuel cell system may not start on the first attempt after the 12-volt bat-
tery has recharged but will start normally after the second attempt. This is
not a malfunction.
● The power switch mode is memorized by the vehicle. When the 12-volt bat-
tery is reconnected, the system will return to the mode it was in before the
12-volt battery was discharged. Before disconnecting the 12-volt battery,
turn the power switch off.
If you are unsure what mode the power switch was in before the 12-volt bat-
tery discharged, be especially careful when reconnecting the 12-volt battery.
● If the 12-volt battery is depleted with the shift position in P, it will not be pos-
sible to shift the shift position other than P. In this case, the vehicle cannot
be towed without lifting both front wheels because the front wheels are
locked by the parking lock. ( →P. 363)
● When the 12-volt battery is reconnected, start the fuel cell system, depress
the brake pedal, and confirm that it is possible to shift into each shift posi-
tion.
● Make sure that the key is not inside the vehicle when recharging or replac-
ing the 12-volt battery. The key may be locked in the vehicle if the alarm is
activated. ( →P. 75)
9

4359-2. Customization
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9
Vehicle specifications
Press or of the meter control switches, select the desired
setting, and then press .
To go back to the previous screen or exit the customize mode,
press .
Some function settings are changed simultaneously with other func-
tions being customized. Contact your Toyota dealer for further details.
Settings that can be chan ged by the navigation system
Settings that can be changed by the multi-information display
Settings that can be changed by the vehicle switch
Settings that can be changed by your Toyota dealer
Definition of symbols: O = Av ailable, — = Not available
■Door lock (→P. 120, 398)
Customizable features
4
FunctionDefault
settingCustomized setting
Unlocking using a
mechanical key
Driver’s door unlocked in
first step, all doors
unlocked in
second step
All doors
unlocked in
first step
———O
Automatic door locking
function
Shift position linked door locking
operationOff
O——OSpeed linked door locking
operation
Automatic door unlocking
function
Shift position linked door unlocking operationOff
O——ODriver’s door linked door
unlocking operation

4369-2. Customization
MIRAI_OM_USA_OM62023U■
Smart key system and wireless remote control (
→P. 120 , 131)
■Smart key system (→ P. 131)
FunctionDefault
settingCustomized setting
Operation signal (emergency
flashers)OnOffO——O
Operation buzzer volumeLevel 5OffO——OLevel 1 to 7
Time elapsed before the
automatic door lock function
is activated if a door is not
opened after being unlocked
30 seconds
Off
O——O60 seconds
120 seconds
Open door reminder buzzerOnOff———O
FunctionDefault
settingCustomized setting
Smart key systemOnOff———O
Smart door unlockingDriver’s doorAll the doorsO—OO
Number of consecutive door
lock operations2 timesAs many as desired———O