2023 TOYOTA MIRAI battery

1644-5. Opening, closing the windows
Owners Manual_USA_M62064_en
This function can be used to
prevent children from acciden-
tally opening or closing a pas-
senger window.
Press the switch.
The indicator will come on and
the passenger windows will be
locked.
The passenger windows can still be
opened and closed using the
driver’s switch even if the lock
switch is on.
■The power windows can be
operated when
The power switch is in ON.
■When the 12-volt battery is dis-
connected
The window lock switch is disabled.
If necessary, press the window lock
switch after reconnecting the 12-volt
battery.
WARNING
■Jam protection function
●Never use any part of your body
to intentionally a ctivate the jam
protection function.
●The jam protection function may
not work if something gets
jammed just before the window
is fully closed. Be careful not to
get any part of your body
jammed in the window.
■Catch protection function
●Never use any part of your body
or clothing to intentionally acti-
vate the catch p rotection func-
tion.
●The catch protection function
may not work if something gets
caught just before the window is
fully opened. Be careful not to
get any part of your body or
clothing caught in the window.
Preventing accidental
operation (window lock
switch)

1815-2. Driving procedures
Owners Manual_USA_M62064_en
5
Driving
Shutdown Due to Freezing Stop in
a Safe Place See Owner’s Man-
ual” may be displayed in the multi-
information display.
The fuel cell system is frozen and
cannot be started. Contact your Toy-
ota dealer.
●The power output will be tempo-
rarily limited until the fuel cell sys-
tem reaches full operating
temperature.
●When the traction battery is
extremely cold (below approxi-
mately -22˚F [-3 0˚C]) under the
influence of outsi de temperature,
it may not be poss ible to start the
fuel cell system. In this case, try to
start the fuel ce ll system again
after the temperat ure of the trac-
tion battery increases due to the
outside temperature increase etc.
■If the fuel cell system does not
start
●The immobilizer system may not
have been deactivated. ( P. 7 0 )
Contact your Toyota dealer.
●If a message related to start-up is
shown on the multi-information
display, read the message and fol-
low the instructions.
●Check that the fuel door is closed.
When the fuel doo r is open, the
fuel cell system cannot be started.
Close the fuel door before starting
the system. ( P.212)
■Sounds and vibrations specific
to a fuel cell electric vehicle
 P. 7 7
■If the 12-volt battery is dis-
charged
The fuel cell system cannot be
started using the smart key system.
Refer to P.485to res tart the fuel cell
system.
■Electronic key battery depletion
 P. 1 2 4
■Conditions affecting operation
 P.138
■Notes for the entry function
 P.138
■If “Smart Key System Malfunc-
tion See Owner’s Manual” is
displayed on the multi-informa-
tion display
The system may be malfunctioning.
Have the vehicle inspected by your
Toyota dealer immediately.
■If the “READY” indicator does
not come on
In the event that the “READY” indi-
cator does not come on even after
performing the proper procedures
for starting the vehicle, contact your
Toyota dealer immediately.
■If the fuel cell system is mal-
functioning
 P.464
■Electronic key battery
 P.436
■Operation of the power switch
●If the switch is not pressed shortly
and firmly, the power switch mode
may not change or the fuel cell
system may not start.
●If attempting to restart the fuel cell
system immediately after turning
the power switch off, the fuel cell
system may not start in some
cases. After turning the power
switch off, please wait a few sec-
onds before restarting the fuel cell
system.
■Customization
If the smart key system has been
deactivated in a customized setting,
refer to P.482.

1845-2. Driving procedures
Owners Manual_USA_M62064_en
“ACCESSORY”
“IGNITION ON”
1 OFF
The emergency flashers can be
used.
2ACC
Some electrical components such
as the audio system can be used.
“ACCESSORY” will be displayed
on the meter.
3ON
All electrical com ponents can be
used.
“IGNITION ON” will be displayed on
the meter.
■Auto power off function
If the vehicle is le ft in ACC for more
than 20 minutes or ON (with fuel cell
system not operating) for more than
an hour with the shif t position in P,
the power switch will automatically
turn off. However, this function can-
not entirely prevent the 12-volt bat-
tery discharge. Do not leave the
vehicle with the power switch in
ACC or ON for long periods of time
when the fuel cell system is not
operating.
NOTICE
■To prevent 12-volt battery dis-
charge
●Do not leave the power switch
in ACC or ON for long periods of
time without the fuel cell system
on.
●If “ACCESSORY” or “IGNITION
ON” is displayed on the meter,
the power switch is not off. Exit
the vehicle after turning the
power switch off.

1875-2. Driving procedures
Owners Manual_USA_M62064_en
5
Driving
speed with the accelerator pedal
depressed
●When attempting to change the
shift position from P or N to Br
mode
●When the P position switch is
pressed while driving
When driving at an extremely low
speed, the shift position may
change to P.
■The shift position automatically
changes to N when
In the following situations, a buzzer
will sound to inform you that the shift
position has been changed to N.
Use the appropriate operation to
attempt to change the shift position
again.
●When attempting to change the
shift position to R while the vehicle
is moving forward
When driving at a low speed, the
shift position may change to R.
●When attempting to change the
shift position to D while the vehicle
is moving backward
When driving at a low speed, the
shift position may change to D.
●When attempting to change the
shift position from R to Br mode
■If the N shift position is selected
while driving
If the shift lever is moved to N while
driving above a certain speed, the
shift position will change to N with-
out holding the shi ft lever in the N
position. In this situation, a buzzer
will sound and a message will be
displayed on the multi-information
display to inform you that the shift
position has been changed to N.
■Automatic P position selection
function
In the following situations, the shift
position is automatically changed to
P.
●When pressing t he power switch
with the vehicle stopped while the
power switch is in ON and the shift
position is in a position other than
P (after the shift position has
changed to P, the power switch
will turn off)
*
●If the driver’s door is opened and
all of the following conditions are
met, while the shift position is in a
position other than P
• The power switch is in ON.
• The driver is not wearing the seat
belt.
• The brake pedal is not depressed.
To start off the vehicle after the shift
position is changed to P, operate the
shift lever again.
●When the vehicle is stopped after
the fuel cell system has been
stopped in an emergency while
driving
●When voltage of the 12-volt bat-
tery drops while the shift position
is in a position other than P
*: When the power switch is pressed
while driving at extremely slow
speeds, such as immediately
before stopping th e vehicle, the
shift position may automatically
change to P. Make sure that the
vehicle is completely stopped
before pressing the power switch.
■If the shift position cannot be
shifted from P
There is a possibility that the 12-volt
battery is dischar ged. Check the 12-
volt battery in this situation.
(  P.485)

1895-2. Driving procedures
Owners Manual_USA_M62064_en
5
Driving
shift position to P.
 Make sure to operate the shift
lever with the fuel cell system
is operating.
If the fuel cell system is not
operating, it may not be possi-
ble to hold the shift position in
N.
*: To keep this state, do not operate
the power switch. If the power
switch is operated repeatedly, the
power switch will turn off after the
shift position has automatically
changed to P.
■Driving mode
 P. 3 2 0
■Snow mode
 P. 3 2 1
■Br mode
Suitable for driving that requires
strong deceleration force, such
as down-hill driving, etc.
To select Br mode, shift the shift
lever down.
The Br mode indicator will illumi-
nate on the meter.
To return to normal driving mode,
depress the accelerator pedal or
select the D position again with the
shift lever.
■Br mode
Depending on the condition of the
traction battery, Br mode may not be
available. In that case, a message is
displayed on the multi-information
display.
■Sounds when in Br mode
 P. 7 7
Selecting the driving
mode

1975-2. Driving procedures
Owners Manual_USA_M62064_en
5
Driving
vehicle in frozen areas
●When the 12-volt battery terminals
are disconnected and remain as
such in frozen areas
Operate the water release function
with the following p rocedure before-
hand to prevent water from freezing
in the system.
1 Turn the power switch to ON and
press the H
2O switch.
Check that the “A ctive Purge Mode
ON” message is displayed in the
multi-information display.
2 While depressing the brake,
press the power switch to start
the fuel cell system.
Check that the “READY” indicator
turns on.
3 Press the power switch to stop
the fuel cell system.
The water release is automatically
performed. (Longer than normal
water purge)
■Purging while parked
The water release function does not
completely prevent purging while
parked. The purge capacity while
parked changes depending on out-
side temperature and operating con-
ditions.
If the “READY” indicator continues
to remain on after water release has
been performed, w ater may be gen-
erated and purged when parked.

1995-3. Operating the lights and wipers
Owners Manual_USA_M62064_en
5
Driving
■Headlight control sensor
The sensor may not function prop-
erly if an object is placed on the sen-
sor, or anything that blocks the
sensor is affixed to the windshield.
Doing so interfere s with the sensor
detecting the level of ambient light
and may cause the automatic head-
light system to malfunction.
■Automatic light off system
●When the headlights are on: The
headlights and tail lights turn off
30 seconds after the driver’s door
is opened and clos ed if the power
switch is turned to ACC or off.
(The lights turn off immediately if
on the key is pressed after all
the doors are closed.)
●When only the tail lights are on:
The tail lights tu rn off automati-
cally if the power switch is turned
to ACC or off and the driver’s door
is opened.
To turn the lights on again, turn the
power switch to ON, or turn the light
switch off once and then back to
or .
■Light reminder buzzer
A buzzer sounds when the power
switch is turned off or turned to ACC
and the driver’s door is opened
while the lights are turned on.
■Automatic headlight leveling
system (if equipped)
The level of the headlights is auto-
matically adjusted according to the
number of passengers and the load-
ing condition of the vehicle to ensure that the headlights do not
interfere with other road users.
■Windshield wiper linked head-
light illumination
When driving during daytime with
the headlight switch turned to , if
the windshield wipers are used, the
headlights will turn o n automatically
after several seconds to help
enhance the visibility of your vehi-
cle.
■12-volt battery-saving function
In order to prevent the 12-volt bat-
tery of the vehicle from discharging,
if the headlights and/or tail lights are
on when the power switch is turned
off the 12-volt battery saving func-
tion will operate and automatically
turn off all the lig hts after approxi-
mately 20 minutes. When the power
switch is turned to ON, the 12-volt
battery-saving function will be dis-
abled.
When any of the following are per-
formed, the 12-volt battery-saving
function is canceled once and then
reactivated. All the lights will turn off
automatically 20 minutes after the
12-volt battery-saving function has
been reactivated:
●When the headlight switch is oper-
ated
●When a door or the trunk is
opened or closed
■Customization
Some functions can be customized.
(  P.512)
NOTICE
■To prevent 12-volt battery dis-
charge
Do not leave the lights on longer
than necessary when the fuel cell
system is off.

2235-5. Using the driving support systems
Owners Manual_USA_M62064_en
5
Driving
“Pre-Collision System OFF”
■Changing the pre-collision
warning timing
The pre-collision warning timing
can be changed on
( P.512) of the multi-informa-
tion display.
The warning timing setting is
retained when the power switch is
turned off. However , if the pre-colli-
sion system is disabled and re-
enabled, the operation timing will
return to the default setting (mid-
dle).
If the pre-collision warning tim-
ing is changed, emergency
steering assist timing will also
be changed accordingly.
If late is selected, emergency
steering assist would not oper-
ate in case of an emergency.
1 Early
2 Middle
This is the default setting.
3Late
■Operational conditions for e ach pre-collision function
The pre-collision syst em is enabled and the system determines t hat the pos-
sibility of a frontal c ollision with a detected object is high.
The system may not operate in the following situations:
• If a 12-volt battery terminal has been di sconnected and reconn ected and
then the vehicle has not been dr iven for a certain amount of time
• If the shift position is in R
• When the VSC OFF indicator is illuminated (only the pre-collision warning
function will be operational)
The operation speeds and operati on cancelation for each function is listed
below.