TOYOTA MIRAI 2018 Owners Manual (in English)

3718-2. Steps to take in an emergency
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When trouble arises
Parking brake warning light (warning buzzer)*2
Parking brake has not been fully released
 Operate the parking brake once again.
If the light turns off after the parking brake is fully release d,
the system is operating normally.
Open door warning light (warning buzzer)*3
Indicates that a door or the trunk is not fully closed
 Check that all the doors and the trunk are closed.
Low fuel level warning light
Indicates that remaining fuel is approximately 2.4 lb.
(1.1 kg) or less
 Refuel the vehicle.
Driver’s and front passenger’ s seat belt reminder light
(warning buzzer)
*4
Warns the driver and/or front passenger to fasten their
seat belts
 Fasten the seat belt.
If the front passenger’s seat is occupied, the front
passenger’s seat belt also needs to be fastened to
make the warning light (warning buzzer) turn off.
Master warning light
A buzzer sounds and the warning light comes on and
flashes to indicate that the master warning system has
detected a malfunction.
 P. 376
Tire pressure warning light
Indicates low tire pressure due to one of the following:
• Flat tire
• Natural causes
• The tire pressure warning system is malfunctioning
 Immediately stop the veh icle in a safe place.
Handling method ( P. 3 7 3 )
Warning lightWarning light/Details/Actions

3728-2. Steps to take in an emergency
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*1: Brake warning buzzer: When there is a malfunction that leads to a decline in the brak e effective-
ness, a buzzer sounds while at the same time a warning light co mes on.
*2: Parking brake engaged warning buzzer:
P. 186
*3: Open door warning buzzer:
A buzzer will sound if the vehicle reaches a speed of 3 mph (5 km/h) or
more with any door open.
*4: Driver’s and front passenger’s seat belt warning buzzer:
The driver’s seat belt warning buzzer sounds to alert the drive r that his or
her seat belt is not fastened. Once the power switch is turned to ON mode,
the buzzer sounds for 6 seconds. If the vehicle reaches a speed of 12 mph
(20 km/h), the buzzer sounds once. If the seat belt is still unfastened after
24 seconds, the buzzer will sound intermittently for 10 seconds . Then, if
the seat belt is still unfastened, the buzzer will sound in a d ifferent tone for
20 more seconds.
The front passenger’s seat belt warning buzzer sounds to alert the front
passenger that his or her seat belt is not fastened. The buzzer sounds
once if the vehicle reaches a speed of 12 mph (20 km/h). If the seat belt is
still unfastened after 24 seconds, the buzzer will sound intermittently for
10 seconds. Then, if the seat belt is still unfastened, the buzzer will sound
in a different tone for 20 more seconds.
*5: This light illuminates on the multi-information display.
Brake Override System/Drive-Start Control warning
light
*5
Indicates that:
• The Brake Override System is operating;
• The Brake Override System is malfunctioning (with warning buzzer);
• The Drive-Start Control is operating (with warning buzzer); or
• The Drive-Start Control is malfunctioning (with warning
buzzer)
 Follow the instruction that are displayed on the multi-
information display.
Warning lightWarning light/Details/Actions

3738-2. Steps to take in an emergency
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When trouble arises
■SRS warning light
This warning light system monitors the airbag sensor assembly, front impact
sensors, side impact sensors (front door), side impact sensors (front), side
impact sensors (rear), driver’s seat position sensor, driver’s seat belt buckle
switch, front passenger occupant classification system (ECU and sensors),
“AIR BAG ON” indicator light, “AIR BAG OFF” indicator light, fr ont passen-
ger’s seat belt buckle switch, seat belt pretensioners, airbags , interconnect-
ing wiring and power sources. ( P. 38)
■ Front passenger detection sensor, seat belt reminder and warnin g
buzzer
● If luggage is placed on the front passenger seat, the front pas senger detec-
tion sensor may cause the warning light to flash and the warnin g buzzer to
sound even if a passenger is not sitting in the seat.
● If a cushion is placed on the seat, the sensor may not detect a passenger,
and the warning light may not operate properly.
■ Electric power steering system wa rning light (warning buzzer)
When the 12-volt battery charge becomes insufficient or the vol tage tempo-
rarily drops, the electric power steering system warning light may come on
and the warning buzzer may sound.
■
When the tire pressure warning light comes on
Inspect the appearance of the ti re to check that the tire is not punctured.
If the tire is punctured: P. 381
If the tire is not punctured:
After turning the power switch t o off, turn it to ON mode again and make
sure the tire pressure warning light comes on or blinks.
The tire pressure warning light comes on
After the temperature of the tires have lowered sufficiently, c heck the
tire inflation pressure and ad just it to the specified level.
If the warning light does not go out even after several minutes , check
that the tire inflation pressu re is at the specified level.
If the warning light does not go out even after several minutes, have the
vehicle inspected by your Toyota dealer immediately.
The tire pressure warning light is blinking for 1 minute, and t hen comes
on
Malfunction in the tire pressure warning system. Have the syste m
checked by your Toyota dealer immediately.
■The tire pressure warning light may come on due to natural caus es
The tire pressure warning light may come on due to natural caus es such
as natural air leaks and tire inflation pressure changes caused by tem-
perature. In this case, adjusting the tire inflation pressure w ill turn off the
warning light (afte r a few minutes).
■Conditions that the tire pressure warning system may not functi on
properly
 P. 3 3 6

3748-2. Steps to take in an emergency
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Warning buzzer
In some cases, the buzzer may not be heard due to being in a no isy location
or audio sound.
WARNING
■ If both the ABS and the brake s ystem warning lights remain on
Stop your vehicle in a safe place immediately and contact your To y o t a
dealer. The vehicle will become extremely unstable during braki ng, and the
ABS system may fail, which could cause an accident resulting in death or
serious injury.
■ When the electric power steering system warning light comes on
When the light comes on yellow, the assist to the power steerin g is
restricted. When the light comes on red, the assist to the powe r steering is
lost and handling operations of the steering wheel become extre mely
heavy. When steering wheel operations are heavier than usual, g rip the
steering wheel firmly and operate it using more force than usua l.
■
If the tire pressure warning light comes on
Handling method ( P. 3 7 3 )
Be sure to observe the following precautions. Failure to do so could
cause a loss of vehicle control and result in death or serious injury.
●Stop your vehicle in a safe place as soon as possible. Adjust t he tire
inflation pressure immediately.
●If the tire pressure warning light comes on even after tire inf lation pres-
sure adjustment, it is probable that you have a flat tire. Chec k the tires.
If a tire is flat, repair the fla t tire by using emergency tire puncture
repair kit.
●Avoid abrupt maneuvering and braking. If the vehicle tires dete riorate,
you could lose control of the steering wheel or the brakes.
■If a blowout or sudden air leakage should occur
The tire pressure warning system may not activate immediately.

3758-2. Steps to take in an emergency
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When trouble arises
WARNING
■Maintenance of the tires
Each tire, including the spare (if provided), should be checked monthly
when cold and inflated to the inflation pressure recommended by the
vehicle manufacturer on the vehicle placard or tire inflation p ressure
label (tire and load information label). (If your vehicle has t ires of a dif-
ferent size than the size indica ted on the vehicle placard or tire inflation
pressure label [tire and load information label], you should de termine
the proper tire inflation p ressure for those tires.)
As an added safety feature, your vehicle has been equipped with a tire
pressure monitoring system (TPMS -tire pressure warning system) that
illuminates a low tire pressure telltale (tire pressure warning light) when
one or more of your tires is significantly under-inflated. Acco rdingly,
when the low tire pressure telltale (tire pressure warning ligh t) illumi-
nates, you should stop and check your tires as soon as possible , and
inflate them to the proper pressure. Driving on a significantly under-
inflated tire causes the tire to overheat and can lead to tire failure.
Under-inflation also reduces fuel efficiency and tire tread lif e, and may
affect the vehicle’s handl ing and stopping ability.
Please note that the TPMS (tire pressure warning system) is not a sub-
stitute for proper tire maintena nce, and it is the driver’s responsibility to
maintain correct tire pressure, even if under-inflation has not reached
the level to trigger illumination of the TPMS low tire pressure telltale (tire
pressure warning light).
Your vehicle has also been equipped with a TPMS (tire pressure warn-
ing system) malfunction indicato r to indicate when the system is not
operating properly. The TPMS (tire pressure warning system) mal func-
tion indicator is combined with the low tire pressure telltale (tire pressure
warning light). When the system detects a malfunction, the tell tale will
flash for approximately one mi nute and then remain continuously illumi-
nated. This sequence will continue upon subsequent vehicle star t-ups
as long as the malfunction exists . When the malfunction indicator is illu-
minated, the system may not be able to detect or signal low tir e pres-
sure as intended.
TPMS (tire pressure warning system) malfunctions may occur for a vari-
ety of reasons, including the installation of replacement or al ternate tires
or wheels on the vehicle that prevent the TPMS (tire pressure w arning
system) from functioning properly. Always check the TPMS (tire pres-
sure warning system) malfunction telltale after replacing one o r more
tires or wheels on your vehicle to ensure that the replacement or alter-
nate tires and wheels allow the TPMS (tire pressure warning sys tem) to
continue to function properly.

3768-2. Steps to take in an emergency
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If a warning message is displayed
Multi-information display
Master warning light
The master warning light also
comes on or flashes in order to
indicate that a message is cur-
rently being displayed on the multi-
information display.
If any of the warning messages are shown again after the following
actions have been performed, contact your Toyota dealer.
The warning lights and warning buzzers operate as follows depending
on the content of the message. If a message indicates the need for
inspection by a dealer, have the vehicle inspected by your Toyota
dealer immediately.
The multi-information display shows warnings of system mal-
functions, incorrectly performed operations, and messages that
indicate a need for maintena nce. When a message is shown,
perform the correction procedur e appropriate to the message.
Messages and warnings
System
warning light
Warning buzzer*Warning
Comes on 
Sounds Indicates an important situation,
such as when a system related to
driving is malfunctioning or that
danger may result if the correction
procedure is not performed

Comes
on or
flashes
Sounds
Indicates an important situation,
such as when the systems shown
on the multi-information display
may be malfunctioning
FlashesSounds
Indicates a situation, such as
when damage to the vehicle or
danger may result

3778-2. Steps to take in an emergency
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When trouble arises
*: A buzzer sounds the first time a message is shown on the multi-informa-
tion display.
■ System warning lights
The master warning light does not come on or flash in the following cases.
Instead, a separate system warning light will come on along wit h a message
shown on the multi-information display.
● Malfunction of the ABS
The ABS warning light comes on. ( P. 370)
● Malfunction of the charging system
The charging system warning light comes on. ( P. 3 6 9 )
■ If “High FC Temperature Reduced Power” is displayed
Lower the speed while check the safety, and run the vehicle like this for
several minutes.
If the message goes off, the vehicle can be driven as is, since it temporarily
overheated.
This message may be displayed when driving under severe operati ng con-
ditions.
(For example, when driving up a long steep hill.)
■ If “FC System Shutdown due to F reezing conditions Stop Your Veh icle in
a Safe Place and Contact Your Dealer” is displayed.
The fuel cell system is frozen and can not be started. Contact a Toyota
dealer.
■ If “Maintenance Required for Hybrid Battery Cooling Parts at Yo ur
Dealer” is displayed
The filter may be clogged, the air intake vent may be blocked or there may be
a gap in the duct. Have maintenance performed on the traction b attery cool-
ing component at your Toyota dealer.
Comes onDoes not sound
Indicates a condition, such as mal-
function of electrical components,
their condition, or indicates the
need for maintenance
FlashesDoes not sound
Indicates a situation, such as
when an operation has been per-
formed incorrectly, or indicates
how to perform an operation cor-
rectly
System
warning
light
Warning buzzer*Warning

3788-2. Steps to take in an emergency
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If “Shift to P Before Exiting Vehicle” is displayed
Message is displayed when the driver’s door is opened without t urning the
power switch to off with the shift position in any position oth er than P.
Shift the shift position to P.
■ If “Shift is in N Release Accelerator Before Shifting” is displ ayed
Message is displayed when the accelerator pedal has been depressed and
the shift position is in N. Release the accelerator pedal and s hift the shift posi-
tion to D or R.
■ If “Press Brake When Vehicle is Stopped FC System may Overheat” is
displayed
Message is displayed when the accelerator pedal is depressed to maintain
the vehicle position when stopped on an upward slope, etc.
If this continues, the fuel cell system may overheat.
Release the accelerator pedal and depress the brake pedal.
■ If “Accelerator Pedal is Pressed Check The Accelerator Pedal” i s dis-
played
The accelerator pedal may be stuck.
If the message does not disappear even when the foot has been removed
from the accelerator pedal, check that the accelerator pedal is not stuck.
■ If “Ion Filter Maintenance Requi red Visit Your Dealer” is displayed
Ion filter replacement is necessary. Contact your Toyota dealer .
■ If “Shift System Malfunction St op Your Vehicle in a Safe Place then See
Owner’s Manual” is displayed
The shift position may not be able to be shifted. Stop the vehi cle in a safe
place.
Contact your Toyota dealer immediately.
■ If “Shift System Malfunction Shi fting Unavailable See Owner’s M anual”
is displayed
The shift position may not be able to be shifted from P to a position other than
P.
Contact your Toyota dealer immediately.
■ If “Shift System Malfunction When Parking, Apply Parking Brake
Securely then See Owner’s Manual” is displayed
●The parking lock mechanism may not operate.
● The automatically P position selection function ( P. 177) may not operate.
● The power switch may not turn off. In that case, engage the par king brake
and the switch can be turned to off.
● The fuel cell system may not be able to be started.
When parking, choose a flat surface and be sure to engage the p arking
brake.
Have the vehicle inspected by your Toyota dealer immediately.

3798-2. Steps to take in an emergency
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When trouble arises
■If “[P] Switch Malfunction When Parking, Apply Parking Brake Se curely
then See Owner’s Manual” is displayed
The shift position may not switch to P even though the P position switch is
pressed.
When parking, choose a flat surface and be sure to engage the p arking
brake.
Have the vehicle inspected by your Toyota dealer immediately.
■ If “Shift System Malfunction See Owner’s Manual” is displayed
If left as is, the system may not operate properly and an unexp ected hazard
or damage may occur.
Have the vehicle inspected by your Toyota dealer immediately.
■ If “Insufficient Aux Battery Charge When Parking, Apply Parking Brake
Securely then See Owner’s Manual” is displayed
● The parking lock mechanism may not operate.
● The power switch may not turn off. In that case, engage the par king brake
and the switch can be turned to off.
● Even after charging the 12-volt battery, the warning message ma y continue
to be displayed until the shift position is shifted from P to a position other
than P.
● The fuel cell system may not be able to be started.
When parking, choose a flat surface and be sure to engage the p arking
brake.
Have the 12-volt battery charged or replaced.
■ If “Insufficient Aux Battery Cha rge Shift is Unavailable See Ow ner’s
Manual” is displayed
Due to the voltage of the 12-volt battery being in a declined c ondition, when
trying to shift the shift position the warning message is displ ayed.
Have the 12-volt battery charged or replaced.
■ If “Shifting Temporarily Unavaila ble Wait a Moment and Try Agai n” is
displayed
A warning message is displayed when the shift lever and P posit ion switch
are repeatedly operated over a short period of time.
Shift the shift position after waiting for short amount of time .
■ If “Shifting to [Br] Mode Unavailable Shift to [D] once, then S hift to [Br]”
is displayed
When the shift position is in P or N, a warning message is disp layed when try-
ing to shift to Br mode.
Shift to Br mode after the shift position had been set to D.
■ If “Shifted to [N] Position Shift to [D] once, then Shift to [B r]” is dis-
played
When the shift position is in R, a warning message is displayed when trying to
shift to Br mode.
The shift position is changed to N.
Shift to Br Mode after the shift position has been set to D.

3808-2. Steps to take in an emergency
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If “Shifting to [D] or [R] Position Unavailable Try to Shift af ter FC System
has Started” is displayed
When the power switch is in ON mode (“READY” indicator switched off), a
warning message is displayed when trying to shift the shift position to R or D,
or shift to Br mode.
After starting the fuel cell system, shift the shift position t o R or D, or shift to Br
mode.
■ If “Shifting Unavailable Press Brake Pedal before Shifting” is displayed
A warning message is displayed when attempting to shift the shi ft position
without depressing the brake pedal.
Depress the brake pedal and shift the shift position when chang ing it from P.
■ If “Shifted to [N] Position Stop Your Vehicle before Shifting t o [D]” is dis-
played
While the vehicle is moving backward, a warning message is disp layed when
attempting to shift the shift position to D.
The shift position is changed to N.
Shift the shift position after stopping the vehicle.
■ If “Shifted to [N] Position Stop Your Vehicle before Shifting t o [R]” is dis-
played
When the vehicle is moving forward, a warning message is displa yed when
attempting to shift the shift position to R.
The shift position is changed to N.
Shift the shift position after stopping the vehicle.
■ If “Shifted to [N] Position To Shift to [P], Stop Your Vehicle and Press [P]
Switch” is displayed
When the vehicle is moving, a warning message is displayed when the P
position switch is operated and attempting to shift the shift p osition to P.
The shift position is changed to N.
Operate the P position switch after the vehicle has been brough t to a com-
plete stop.
■ If “Smart Entry & Start System M alfunction See Owner’s Manual” is dis-
played
P. 133
■ Warning buzzer
P. 374