2023 TOYOTA MIRAI stop start

4658-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
depressed to hold the vehicle while
the vehicle is stopped on an incline,
etc. The fuel cell system may over-
heat. Release the accelerator pedal
and depress the brake pedal.
■If “Auto Power OFF to Conserve
Battery” is displayed
Power was turned off due to the
automatic power off function. Next
time when starting the fuel cell sys-
tem, operate the fuel cell system for
approximately 5 minutes to
recharge the 12-volt battery.
■If “Headlight System Malfunc-
tion Visit Your Dealer” is dis-
played
The following systems may be mal-
functioning. Have the vehicle
inspected by your Toyota dealer
immediately.
●The LED headlight system
●The automatic headlight leveling
system (if equipped)
●AHB (Automatic High Beam)
■If “Radar Cruise Control
Unavailable See Owner’s Man-
ual” is displayed
The dynamic radar cruise control
with full-speed range system is sus-
pended temporarily or until the prob-
lem shown in the message is
resolved. (Causes and coping meth-
ods: P.217)
■If “Radar Cruise Control
Unavailable” is displayed
The dynamic radar cruise control
with full-speed range system cannot
be used temporarily. Use the system
when it becomes available again.
■If a message that indicates the
malfunction of front camera is
displayed
The following sys tems may be sus-
pended until the pr oblem shown in
the message is resolved. ( P.217,
454)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●AHB (Automatic High Beam)
●RSA (Road Sign Assist) (if
equipped)
●Dynamic radar cruise control with
full-speed range
■If a message that indicates the
malfunction of radar sensor is
displayed
The following systems may be sus-
pended until the problem shown in
the message is resolved. (P.217,
454)
●PCS (Pre-Collision system)
●LTA (Lane Tracing Assist)
●Dynamic radar cruise control with
full-speed range
■If “Shift System Malfunction
Shifting Unavailable Drive to a
Safe Place and Stop” or “Shift
System Malfunction Driving
Unavailable” is displayed
There is a malfunc tion in the shift
control system. Have the vehicle
inspected by your Toyota dealer
immediately.
■If a message that indicates the
need for the shift lever opera-
tion is displayed
To prevent the shift lever from being
operated incorrectl y or the vehicle
from moving unexpectedly, a mes-
sage that requires shifting the shift
position may be displayed on the
multi-information display. In that
case, follow the in struction of the
message and shift the shift position.
■If a message regarding
Advanced Drive is displayed
Refer to “Toyota Teammate
Advanced Drive OWNER’S MAN-
UAL” at Toyota.com for details.

4668-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
■If a message that indicates the
need for visiting your Toyota
dealer is displayed
The system or part shown on the
multi-information display is malfunc-
tioning. Have the vehicle inspected
by your Toyota dealer immediately.
■If a message that indicates the
need for referring to Owner’s
Manual is displayed
●If any of the following messages
are shown on the multi-informa-
tion display, it may indicate a mal-
function. Have the vehicle
inspected by you r Toyota dealer
immediately.
• “Smart Key System Malfunction
See Owner’s Manual”
• “P Switch Malfunction Apply Park- ing Brake Securely When Parking
See Owner’s Manual”
• “Shift System Malfunction Apply Parking Brake Securely When
Parking See Owner’s Manual”
• “Shift System Unavailable Apply Parking Brake Securely When
Parking See Owner’s Manual”
• “Shift System Malfunction See Owner’s Manual”
• “Shift System Malfunction Stop in a Safe Place See Owner’s Man-
ual”
• “Battery Low Shifting Unavailable See Owner’s Manual”
• “FCV system malfunction”
• “Traction battery system malfunc-
tion”
• “Accelerator System Malfunction”
●If any of the following messages
are shown on the multi-informa-
tion display, it may indicate a mal-
function. Immediat ely stop the
vehicle and contact your Toyota
dealer.
• “Braking Power Low Stop in a Safe Place See Owner’s Manual”
• “FCV System Shutdown Due to
Hydrogen Leakage Stop in a Safe
Place See Owner’s Manual”
●If “FCV system stopped” is shown
on the multi-information display,
the vehicle may have run out of fuel. Stop the vehicle in a safe
place and, if the fuel level is low,
refuel the vehicle. (
P.83)
●If “Low Auxiliary Battery See
Owner’s Manual” is shown,
• When the display goes off after several seconds (displays for
about 6 seconds): Maintain the
fuel cell system operation for more
than 15 minutes and charge the
12-volt battery.
• When the display does not go off: Start up the fuel cell system using
the procedures: P. 4 8 5
●If “Maintenance Required for Trac-
tion Battery Cooling Parts See
Owner’s Manual” is shown, the fil-
ters may be clogged, the air intake
vents may be blocked, or there
may be a gap in the duct. There-
fore, perform the following correc-
tion procedure.
• Cleaning the traction battery air intake vents ( P.433)
If the warning message is shown
even if the vents are cleaned,
have the vehicle inspected by
your Toyota dealer.
■If “Ion Filter Maintenance
Required Visit Your Dealer” is
displayed
Ion filter replacement is necessary.
Contact your Toyota dealer.
NOTICE
■If “Low Auxiliary Battery See
Owner’s Manual” is displayed
frequently
The 12-volt battery may have
deteriorated. As the battery may
discharge in this state when left
unattended, have the battery
inspected by you r Toyota dealer.

4848-2. Steps to take in an emergency
Owners Manual_USA_M62064_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.436)
■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.71)
■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.183)
Starting the fuel cell sys-
tem

4938-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
8
When trouble arises
able.
6 Start the fuel cell system and
turn the air conditioning sys-
tem on to check that the radi-
ator cooling fan operate and
to check for coolant leaks
from the radiator or hoses.
The fan operate when the air condi-
tioning system is turned on immedi-
ately after a cold s tart. Confirm that
the fan is operating by checking the
fan sound and air flow. If it is diffi-
cult to check these, turn the air con-
ditioning system on and off
repeatedly.
(The fan may not o perate in freez-
ing temperatures.)
7 If the fan is not operating:
Stop the fuel cell system
immediately and contact your
Toyota dealer.
If the fan is operating:
Have the vehicle inspected at
the nearest Toyota dealer.
WARNING
■When inspecting under the
hood of your vehicle
Observe the following precau-
tions.
Failure to do so may result in seri-
ous injury such as burns.
●If steam is seen coming from
under the hood, do not open the
hood until the steam has sub-
sided. The fuel cell unit com-
partment may be very hot.
●Even if fuel cell system has
stopped, the cooling fan may
begin to move suddenly.
Do not touch or approach the
rotating parts of the fan. Doing
so may lead to fingers, clothes
or tools getting caught, resulting
in injury.
●Do not loosen the coolant reser-
voir caps or radia tor cap, while
the fuel cell system and radiator
are hot.
High temperature steam or
coolant could spray out.
NOTICE
■When inverter coolant
Add coolant slowly after the fuel
cell system has cooled down suffi-
ciently. Adding inverter cool cool-
ant to a hot fuel cell system too
quickly can cause damage to the
fuel cell system.
■To prevent damage to the
cooling system
Observe the following precau-
tions:
●Avoid contaminating the coolant
with foreign matter (such as
sand or dust etc.).
●Do not use any coolant additive
with inverter coolant.
●For replacement of the fuel cell
stack coolant, contact your Toy-
ota dealer.
●Do not use water or any other
coolant when refilling the fuel
cell stack coolant. Also, do not
use any additive agents for the
coolant.

4948-2. Steps to take in an emergency
Owners Manual_USA_M62064_en
1Set the parking brake and
stop the fuel cell system.
2 Remove the mud, snow or
sand from around the rear
wheels.
3 Place wood, stones or some
other material under the rear
wheels to help provide trac-
tion.
4 Restart the fuel cell system.
5 Shift the shift position to D or
R and release the parking
brake. Then, while exercising
caution, depress the acceler-
ator pedal.
■When it is difficult to free the
vehicle
Press the switch to turn off
TRAC.
“Traction Control Turned Off”
If the vehicle becomes
stuck
Carry out the following pro-
cedures if the tires spin or
the vehicle becomes stuck
in mud, dirt or snow:
Recovering procedure
WARNING
■When attempting to free a
stuck vehicle
If you choose to push the vehicle
back and forth to free it, make
sure the surrounding area is clear
to avoid striking other vehicles,
objects or people. The vehicle
may also lunge forward or lunge
back suddenly as it becomes free.
Use extreme caution.
■When shifting the shift posi-
tion
Be careful not to shift the shift
position with the accelerator pedal
depressed.
This may lead to unexpected
rapid acceleration of the vehicle
that may cause an accident
resulting in death o r serious injury.
NOTICE
■To avoid damaging the trans-
mission and other compo-
nents
●Avoid spinning the rear wheels
and depressing the accelerator
pedal more than necessary.
●If the vehicle remains stuck
even after these procedures are
performed, the vehicle may
require towing to be freed.

5149-2. Customization
Owners Manual_USA_M62064_en
■Gauges, meters and multi-information display (P.99, 105)
*1: For details about each function: P. 1 1 1
*2: The default setting varies according to country.
Function*1Default settingCustomized
setting
LanguageEnglishFrenchOO—Spanish
Units*2miles (MPGe)km (kg/100km)—O—
Eco Accelerator GuidanceOnOff—O—
Fuel economy display
Total average (Average fuel consumption [after reset])
Trip average
(Average fuel consumption [after start])
—O—Tank average (Average fuel consumption
[after refuel])
Audio system linked displayOnOff—O—
Energy monitorOnOff—O—
Drive information typeTrip (after start)To t a l ( a f t e r reset)—O—
Drive information items (First
item)Distance
Average vehi-cle speed
—O—
Elapsed time
Drive information items (Sec-
ond item)Elapsed time
Average vehi-cle speed
—O—
Distance
Current trip result displayDrive informa- tionEco score—O—
Pop-up displayOnOff—O—
Suggestion functionOn
On (when the vehicle is stopped)
O—O
Off

Owners Manual_USA_M62064_en
541What to do if... (Troubleshooting)
Is the electronic key any-
where detectable inside the
vehicle? ( P.136)
 Is the electronic key battery
weak or depleted?
In this case, the fuel cell system
can be started in a temporary way.
( P.484)
 Is the 12-volt battery dis-
charged? ( P.485)
 Is the window lock switch
pressed?
The power window except for the
one at the driver’s seat cannot be
operated if the win dow lock switch
is pressed. ( P.164)
 The auto power off function
will be operated if the vehicle
is left in ACC for a period of
time. ( P.184)
 The seat belt reminder light is
flashing
Are the driver and the front passen-
ger wearing the seat belts?
( P.460)
 The parking brake indicator is
on
Is the parking br ake released?
(  P.191)
Depending on the situation,
other types of warning buzzer
may also sound. ( P.454, 464)
 Did anyone inside the vehicle
open a door during setting the
alarm?
The sensor detects it and the alarm
sounds. ( P. 7 1 )
Do one of the following to deac-
tivate or stop the alarms:
 Except for Canada: Unlock
the doors.
 Except for Canada: Unlock
the trunk using the mechani-
cal key.
 For Canada: Unlock the doors
or trunk using the entry func-
tion or wireless remote con-
trol.
 Turn the power switch to ACC
or ON, or start the fuel cell
system. (The alarm will be
deactivated or stopped after a
few seconds.)
The windows do not
open or close by operat-
ing the power window
switches
The power switch is
turned off a utomatically
A warning buzzer sounds
during driving
An alarm is activated and
the horn sounds

546Alphabetical Index
Owners Manual_USA_M62064_en
Driving ..................................... 169 Break-in tips ......................... 170
Correct driving posture ........... 27
Driving mode select switch... 320
Fuel cell electric vehicle driving tips........................................ 91
Procedures ........................... 169
Winter drive tips ................... 327
Driving information display ... 107
Driving position memory ....... 142 Memory recall function ......... 144
Power easy access system .. 142
Driving range .................... 99, 102
Driving support system informa- tion display ........................... 110
Dynamic radar cruise control with full-speed range ........... 244Approach warning ................ 251
Warning message ................ 254
E
ECB (Electronically Controlled Brake System) ...................... 322Warning light ........................ 454
ECO Accelerator Guidance ... 108
Eco score ................................ 108
EDR (Event data recorder)......... 8
Elapsed time ........................... 111
Electric motor (traction motor) ........................................... 76, 81Location.................................. 81
Specification ......................... 498
Electric Power Steering (EPS) ............................................... 322Warning light ........................ 456
Electronic key ......................... 124 Battery-saving function......... 137
If the electronic key does not operate properly ................. 482
Replacing the battery ........... 436
Electronic sunshade .............. 363 Operation ............................. 363 Electronically Controlled Brake
System (ECB) ........................322Warning light.........................454
Emergency flashers ...............446
Emergency shut off system.....89
Emergency tire puncture repair kit ...........................................467Storage location ...................469
Emergency, in case of If a warning buzzer sounds ..454
If a warning light turns on .....454
If a warning message is dis-played .................................464
If the 12-volt battery is dis- charged ..............................485
If the electronic key does not operate properly .................482
If the fuel cell system will not start ....................................480
If the fuel door cannot be opened ...........................................482
If the vehicle is submerged or water on the road is rising ..447
If you have a flat tire .............467
If you lose your keys.............481
If you think something is wrong ...........................................453
If your vehicle becomes stuck ...........................................494
If your vehicle has to be stopped in an emergency .................446
If your vehicle needs to be towed ...........................................449
If your vehicle ove rheats ......490
Energy monitor ....................... 119
EPS (Electric Po wer Steering)
...............................................322 Warning light.........................456
Event data recorder (EDR) .........8