2022 TOYOTA MIRAI Owners Manual

4658-2. Steps to take in an emergency
Owners Manual_USA_M62084_en
8
When trouble arises
WARNING

4668-2. Steps to take in an emergency
Owners Manual_USA_M62084_en
One of the following may be the
cause of the problem:
The electronic key may not be
functioning properly.
( P.468)
 There may not be sufficient
fuel in the vehicle’s tank.
Refuel the vehicle.
 The fuel door may be open.
( P.205)
 There may be a malfunction
in the immobilizer system.
( P. 6 9 )
 There may be a malfunction
in the shift control system.
*
( P.175, 453)
 There may be a malfunction
in the steering lock system.
 The fuel cell system may be
malfunctioning due to an elec-
trical problem such as elec- tronic key battery depletion or
a blown fuse. However,
depending on the type of mal-
function, an interim measure
is available to start the fuel
cell system. (
P.467)
 There is a possibility that the
temperature of the traction
battery is extremely low
(approximately below -22˚F [-
30˚C]). ( P.83, 172)
 It is possible the fuel cell sys-
tem is frozen. ( P.172)
*: It may not be possible to shift the
shift position from P.
One of the following may be the
cause of the problem:
 The 12-volt battery may be
discharged. ( P.471)
 The 12-volt battery terminal
connections may be loose or
corroded. ( P.400)
One of the following may be the
cause of the problem:
 One or both of the 12-volt bat-
tery terminals may be discon-
If the fuel cell system
will not start
Reasons for the fuel cell
system not starting vary
depending on the situation.
Check the following and
perform the appropriate
procedure:
The fuel cell system will
not start even though the
correct starting 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.
The interior lights and
headlights do not turn on,
or the horn does not
sound.

4678-2. Steps to take in an emergency
Owners Manual_USA_M62084_en
8
When trouble arises
nected. ( P.400)
 The 12-volt battery may be
discharged. ( P.471)
Contact your Toyot a dealer if the
problem cannot be repaired, or if
repair procedures are unknown.
When the fuel cell system does
not start, the following steps can
be used as an interim measure
to start the fuel cell system if the
power switch is functioning nor-
mally.
Do not use this starting proce-
dure except in cases of emer-
gency.
1 Pull the parking brake switch
to check that the parking
brake is set. ( P.183)
Parking brake indicator will come
on.
2 Turn the power switch to
ACC.
3 Press and hold the power
switch for about 15 seconds
while depressing the brake
pedal firmly.
Even if the fuel cell system can
be started using the above
steps, the system may be mal-
functioning. Have the vehicle
inspected by your Toyota dealer.
Starting the fuel cell sys-
tem in an emergency
If you lose your keys
New genuine mechanical
keys can be made by your
Toyota dealer using another
mechanical key and the key
number stamped on your
key number plate.
Keep the plate in a safe
place such as your wallet,
not in the vehicle.
NOTICE
■When an electronic key is lost
If the electronic key remains lost,
the risk of vehicle theft increases
significantly. Visit your Toyota
dealer immediately with all
remaining electronic keys that
were provided with your vehicle.

4688-2. Steps to take in an emergency
Owners Manual_USA_M62084_en
1Remove the cover inside the
trunk.
2 After removing the cover, pull
the lever to unlock the fuel
door and it will be ready to
open as usual.
■When the electronic key does
not work properly
●Make sure that the smart key sys-
tem has not been deactivated in
the customization setting. If it is
off, turn the function on.
●Check if battery-saving mode is
set. If it is set, cancel the function.
( P.131)
If the fuel door cannot
be opened
If the fuel door opener
switch cannot be operated,
the following procedure can
be used to open the fuel
door.
Opening the fuel door
If the electronic key
does not operate prop-
erly
If communication between
the electronic key and vehi-
cle is interrupted ( P.132)
or the electronic key cannot
be used because the battery
is depleted, the smart key
system and wireless remote
control cannot be used. In
such cases, the doors and
trunk can be opened and
the fuel cell system can be
started by following the pro-
cedure below.
NOTICE
■In case of a smart key system
malfunction or other key-
related problems
Take your vehicle with all the elec-
tronic keys provided with your
vehicle to your Toyota dealer.

4698-2. Steps to take in an emergency
Owners Manual_USA_M62084_en
8
When trouble arises
■Locking and unlocking the
door
Use the mechanical key
( P.120) in order to perform the
following operations:
1 Locks all the doors
2 Unlocks all the doors
■Locking the door
1 With the door open, push
down the inside lock button.
2 Close the door.
■Trunk
Turn the mechanical key clock-
wise to open. ( P.71)
■Key linked functions
1 Closes the windows (turn and
hold)
2 Opens the windows (turn and
hold)
These settings mus t be customized
at your Toyota dealer.
Locking and unlocking
the doors, unlocking the
trunk
WARNING
■When using the mechanical
key and operating the power
windows
Operate the power window after
checking to make sure that there
is no possibility of any passenger
having any of their body parts
caught in the window.
Also, do not allo w children to
operate the mechanical key. It is
possible for children and other
passengers to get caught in the
power window.

4708-2. Steps to take in an emergency
Owners Manual_USA_M62084_en
1With the P shift position
selected, firmly depress the
brake pedal.
2 Touch the Toyota emblem
side of the electronic key to
the power switch.
When the electronic key is
detected, a buzzer sounds and the
power switch will turn to ON.
When the smart key system is
deactivated in customization set-
ting, the power switch will turn to
ACC.
3Firmly depress the brake
pedal and check that is
shown on the multi-informa-
tion display.
4 Press the power switch.
In the event that the fuel cell
system still cannot be started,
contact your Toyota dealer.
■Stopping the fuel cell system
Set the parking brake, shift the shift
position to P and press the power
switch as you no rmally do when
stopping the fuel cell system.
■Electronic key battery
As the above proce dure is a tempo-
rary measure, it is recommended
that the electronic key battery be
replaced immediatel y when the bat-
tery is depleted. ( P.423)
■Alarm (For Canada)
Using the mechanical key to lock
the doors will not set the alarm sys-
tem. If a door is unlocked using the
mechanical key when the alarm sys-
tem is set, the alarm may be trig-
gered. ( P.70)
■Changing power switch modes
Release the brake pedal and press
the power switch in step 3 above.
The fuel cell system does not start
and modes will be changed each
time the switch is pressed. ( P.176)
Starting the fuel cell sys-
tem

4718-2. Steps to take in an emergency
Owners Manual_USA_M62084_en
8
When trouble arises
If you have a set of jumper (or
booster) cables and a second
vehicle with a 12-volt battery,
you can jump start your vehicle
by following the steps below.
1 Confirm that the electronic
key is being carried.
When connecting the jumper (or
booster) cables, depending on the
situation, the ala rm may activate and doors locked. (
P. 7 1 )
2 Open the hood. Remove the
fuse box cover. ( P.393)
Push the tabs in and lift the lid off.
3 Open the exclusive jump
starting terminal cover.
4 Connect a positive jumper cabl e clamp to on your vehicle and
connect the clamp on the other end of the positive cable to on
the second vehicle. Then, connect a negative cable clamp to
on the second vehicle and connect the clamp at the other end of
the negative cable to .
When connecting to an unpaint ed metallic point , make the connection
If the 12-volt batter y is
discharged
The following procedures
may be used to start the fuel
cell system if the 12-volt
battery is discharged.
You can also call your Toy-
ota dealer or a qualified
repair shop.
Restarting the fuel cell
system

4728-2. Steps to take in an emergency
Owners Manual_USA_M62084_enafter checking the surrounding a
rea. Also, do not make any connections
where parts nearby may interfere.
Exclusive jump starting terminal (your vehicle)
Positive (+) battery terminal (second vehicle)
Negative (-) battery term inal (second vehicle)
Solid, stationary, unpainted metallic point away from the exclu sive
jump starting terminal and any m oving parts as shown in the illus-
tration
5 Start the engine of the sec-
ond vehicle. Increase the
engine speed slightly and
maintain at that level for
approximately 5 minutes to
recharge the 12-volt battery
of your vehicle.
6 Open and close any of the
doors of your vehicle with the
power switch off.
7 Maintain the engine speed of
the second vehicle and start
the fuel cell system of your
vehicle by turning the power
switch to ON.
8 Make sure the “READY” indi-
cator comes on. If the indica- tor does not come on, contact
your Toyota dealer.
9 Once the fuel cell system has
started, remove the jumper
cables in the exact reverse
order from which they were
connected.
10Close the exclusive jump starting terminal cover and
install the fuse box cover.
Once the fuel cell system starts,
have the vehicle inspected at
your Toyota dealer as soon as
possible.