TOYOTA MIRAI 2022 Owners Manual
Manufacturer: TOYOTA, Model Year: 2022, Model line: MIRAI, Model: TOYOTA MIRAI 2022Pages: 556, PDF Size: 17.34 MB
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2215-5. Using the driving support systems
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5
Driving
• When part of a detectable object  is hidden by an object, such as 
large baggage, an umbrella, or 
guardrail
• When there are many things  which can reflect  the radio waves 
of the radar in the vicinity (tunnels, 
truss bridges, gravel roads, snow 
covered road that have tracks, 
etc.)
• When there is an effect on the  radio waves to the radar that is 
installed on another vehicle
• When multiple detectable objects  are close together
• If the sun or other light is shining  directly on a detectable object
• When a detectable object is a 
shade of white and looks 
extremely bright
• When a detectable object appears 
to be nearly the same color or 
brightness as its surroundings
• If a detectable object cuts or sud-
denly emerges in front of your 
vehicle
• When the front of your vehicle is 
hit by water, snow, dust, etc.
• When a very bright light ahead,  such as the sun or the headlights 
of oncoming traffic, shines directly 
into the front camera
• When approaching the side or 
front of a vehicle ahead
• If a vehicle ahead is a motorcycle
• If a vehicle ahead is narrow, such  as a personal mobility vehicle
• If a preceding vehicle has a small  rear end, such as an unloaded 
truck
• If a preceding vehicle has a low  rear end, such as a  low bed trailer
• If a vehicle ahead has extremely  high ground clearance • If a vehicle ahead is carrying a 
load which protrudes past its rear 
bumper
• If a vehicle ahead is irregularly  shaped, such as a tractor or side 
car
• If a vehicle ahead is a child sized  bicycle, a bicycle that is carrying a 
large load, a bicycle ridden by 
more than one person, or a 
uniquely shaped bicycle (bicycle 
with a child seat, tandem bicycle, 
etc.)
• If a pedestrian/or the riding height  of a bicyclist ahead is shorter than 
approximately 3.2 ft. (1 m) or taller 
than approximate ly 6.5 ft. (2 m)
• If a pedestrian/bic yclist is wearing 
oversized clothing (a rain coat, 
long skirt, etc.), making their sil-
houette obscure
• If a pedestrian is bending forward  or squatting or bicyclist is bending 
forward
• If a pedestrian/bicyclist is moving  fast
• If a pedestrian is pushing a 
stroller, wheelchair, bicycle or 
other vehicle
• When driving in inclement weather 
such as heavy rain, fog, snow or a 
sandstorm
• When driving through steam or 
smoke
• When the surrounding area is dim,  such as at dawn or  dusk, or while 
at night or in a tunnel, making a 
detectable object appear to be 
nearly the same co lor as its sur-
roundings
• When driving in a place where the  surrounding brightness changes 
suddenly, such as  at the entrance 
or exit of a tunnel
• After the fuel c ell system has  
Page 222 of 556

2225-5. Using the driving support systems
Owners Manual_USA_M62084_enstarted the vehicle has not been 
driven for a certain amount of time
• While making a left/right turn and 
for a few seconds after making a 
left/right turn
• While driving on a  curve and for a 
few seconds after driving on a 
curve
• If your vehicle is skidding
• If the front of the vehicle is raised 
or lowered
• If the wheels are misaligned
• If a wiper blade is blocking the  front camera
• The vehicle is being driven at  extremely high speeds
• When driving on a hill
• If the radar sensor or front camera 
is misaligned
• When driving in a  traffic lane sep-
arated by more t han one lane 
where oncoming vehicles are driv-
ing while making a right/left turn
• When largely out of place with the  opposite facing targeted oncom-
ing vehicle during a right/left turn
• While making a right/left turn,  when a pedestrian approaches 
from behind or side of your vehicle
●In addition to the  above, in some 
situations, such as the following, 
the emergency steering assist 
may not operate.
• When the white (yellow) lane lines  are difficult to see, such as when 
they are faint, diverging/merging, 
or a shadow is cast upon them
• When the lane is wider or nar-
rower than normal
• When there is a light and dark pat- tern on the  road surface, such as 
due to road repairs
• When the target is too close
• When there is insufficient safe or  unobstructed space for the vehicle 
to be steered into
• If oncoming vehicle is present
• If VSC function is operating
●In some situations such as the fol-
lowing, sufficien t braking force or 
steering force may not be 
obtained, preventing the system 
from performing properly:
• If the braking functions cannot  operate to their full extent, such as 
when the brake  parts are 
extremely cold, ext remely hot, or 
wet
• If the vehicle is not properly main- tained (brakes or  tires are exces-
sively worn, imprope r tire inflation 
pressure, etc.)
• When the vehicle is being driven  on a gravel road or  other slippery 
surface
• When the road surface has deep  wheel tracks
• When driving  on a hill road
• When driving on a road that has  inclines to the  left or right
■If VSC is disabled
●If VSC is disabled ( P.316), the  
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2235-5. Using the driving support systems
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5
Driving
pre-collision brake assist and pre-
collision braking functions are also 
disabled.
●The PCS warning lig ht will turn on 
and “VSC Turned OFF Pre-Colli-
sion Brake System Unavailable” 
will be displayed  on the multi-
information display.
While driving on a road with 
clear white (yellow) lane lines, 
the LTA system warns the driver 
if the vehicle may deviate from 
the current lane or course
*, and 
also can slightly operate the 
steering wheel to help avoid 
deviation from the lane or 
course
*. Also, while the dynamic 
radar cruise control with full-
speed range is operating, this 
system will operate the steering 
wheel to maintain the vehicle’s 
lane position.
The LTA system recognizes 
white (yellow) lane lines or a 
course
* using the front camera. 
Additionally, it detects preceding 
vehicles using the front camera 
and radar.
*: Boundary between asphalt and  the side of the road, such as 
grass, soil, or a curb
LTA (Lane Tracing 
Assist)
Summary of functions 
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2245-5. Using the driving support systems
Owners Manual_USA_M62084_en
WARNING
■Before using LTA system
●Do not rely solely upon the LTA 
system. The LTA system does 
not automatically drive the vehi-
cle or reduce the amount of 
attention that must be paid to 
the area in front of the vehicle. 
The driver must always assume 
full responsibility for driving 
safely by paying careful atten-
tion to the surrounding condi-
tions and operating the steering 
wheel to correct the path of the 
vehicle. Also, the driver must 
take adequate breaks when 
fatigued, such as from driving 
for a long period of time.
●Failure to perform appropriate 
driving operations and pay care-
ful attention may lead to an 
accident, resulting in death or 
serious injury.
■Situations unsuitable for LTA 
system
In the following situations, use the 
LTA switch to turn the system off. 
Failure to do so may lead to an 
accident, resulting in death or 
serious injury.
●Vehicle is driven on a road sur-
face which is slippery due to 
rainy weather, fallen snow, 
freezing, etc.
●Vehicle is driven on a snow-cov-
ered road.
●White (yellow) lines are difficult 
to see due to rain, snow, fog, 
dust, etc.
●Vehicle is driven in a temporary 
lane or restricted lane due to 
construction work.
●Vehicle is driven in a construc-
tion zone.
●A spare tire, tire chains, etc., 
are equipped.
●When the tires have been 
excessively worn, or when the 
tire inflation p ressure is low.
●During emergency towing.
■Preventing LTA system mal-
functions and operations per-
formed by mistake
●Do not modify the headlights or 
place stickers, etc., on the sur-
face of the lights.
●Do not modify the suspension, 
etc. If the suspension, etc., 
needs to be replaced, contact 
your Toyota dealer.
●Do not install or place anything 
on the hood or grille. Also, do 
not install a gr ille guard (bull 
bars, kangaroo bar, etc.).
●If your windshield needs 
repairs, contact your Toyota 
dealer.
■Conditions in which functions 
may not operate properly
In the following  situations, the 
functions may not operate prop-
erly and the vehicle may depart 
from its lane. Drive safely by 
always paying careful attention to 
your surroundings and operate 
the steering wheel to correct the 
path of the vehicle without relying 
solely on the functions. 
Page 225 of 556

2255-5. Using the driving support systems
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5
Driving
WARNING
●When the follow-up cruising dis-
play is displayed ( P.229) and 
the preceding vehicle changes 
lanes. (Your vehicle may follow 
the preceding vehicle and also 
change lanes.)
●When the follow-up cruising dis-
play is displayed ( P.229) and 
the preceding vehicle is sway-
ing. (Your vehicle may sway 
accordingly and depart from the 
lane.)
●When the follow-up cruising dis-
play is displayed ( P.229) and 
the preceding vehicle departs 
from its lane. (Your vehicle may 
follow the preceding vehicle and 
depart from the lane.)
●When the follow-up cruising dis-
play is displayed ( P.229) and 
the preceding vehicle is being 
driven extremely close to the 
left/right lane line. (Your vehicle 
may follow the preceding vehi-
cle and depart from the lane.)
●Vehicle is being driven around a 
sharp curve.
●Objects or patterns that could 
be mistaken for  white (yellow) 
lines are present on the side of 
the road (guardrails, reflective 
poles, etc.).
●Vehicle is driven where the road 
diverges, merges, etc.
●Repair marks of asphalt, white 
(yellow) lines, etc., are present 
due to road repair.
●There are shadows on the road 
that run parallel with, or cover, 
the white (yellow) lines. 
Page 226 of 556

2265-5. Using the driving support systems
Owners Manual_USA_M62084_en
WARNING
●The vehicle is driven in an area 
without white (yellow) lines, 
such as in front of a tollgate or 
checkpoint, or at an intersec-
tion, etc.
●The white (yellow) lines are 
cracked, “Botts’ dots”, “Raised 
pavement marker” or stones are 
present.
●The white (yellow) lines cannot 
be seen or are difficult to see 
due to sand, etc.
●The vehicle is driven on a road 
surface that is wet due to rain, 
puddles, etc.
●The traffic li nes are yellow 
(which may be more difficult to 
recognize than lines that are 
white).
●The white (yellow) lines cross 
over a curb, etc.
●The vehicle is driven on a bright 
surface, such as concrete.
●If the edge of the road is not 
clear or straight.
●The vehicle is driven on a sur-
face that is bright due to 
reflected light, etc.
●The vehicle is driven in an area 
where the brightness changes 
suddenly, such as at the 
entrances and exits of tunnels, 
etc.
●Light from the h eadlights of an 
oncoming vehicle, the sun, etc., 
enters the camera.
●The vehicle is driven on a slope.
●The vehicle is driven on a road 
which tilts left or right, or a wind-
ing road.
●The vehicle is driven on an 
unpaved or rough road.
●The traffic lane is excessively 
narrow or wide.
●The vehicle is extremely tilted 
due to carrying heavy luggage 
or having improper tire pres-
sure.
●The distance to the preceding 
vehicle is extremely short.
●The vehicle is moving up and 
down a large amount due to 
road conditions during driving 
(poor roads or road seams).
●When driving in a tunnel or at 
night with the headlights off or 
when a headlight is dim due to 
its lens being dir ty or it being 
misaligned.
●The vehicle is struck by a cross-
wind.
●The vehicle is affected by wind 
from a vehicle driven in a 
nearby lane.
●The vehicle has just changed 
lanes or crossed an intersec-
tion.
●Tires which differ by structure, 
manufacturer, brand or tread 
pattern are used.
●When tires of a size other than 
specified are installed.
●Snow tires, etc., are equipped.
●The vehicle is b eing driven at 
extremely high speeds. 
Page 227 of 556

2275-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
■Lane departure alert func-
tion
When the system determines 
that the vehicle might depart 
from its lane or course
*, a warn-
ing is displayed on the multi-
information display, and either a 
warning buzzer will sound or the 
steering wheel will vibrate to 
alert the driver.
When the warning buzzer sounds 
or the steering wheel vibrates, 
check the area around your vehicle 
and carefully operate the steering 
wheel to move the vehicle back to 
the center of the lane.
Vehicle with BSM: When the sys-
tem determines that the vehicle 
might depart from its lane and that 
the possibility of a collision with an 
overtaking vehicle in the adjacent 
lane is high, the lane departure 
alert will operate e ven if the turn 
signals are operating.
*: Boundary between asphalt and  the side of the road, such as 
grass, soil, or a curb
■Steering assist function
When the system determines 
that the vehicle might depart 
from its lane or course
*, the sys-
tem provides assistance as nec-
essary by operating the steering 
wheel in small amounts for a 
short period of time to keep the 
vehicle in its lane.
Vehicle with BSM: When the sys-
tem determines that the vehicle 
might depart from its lane and that 
the possibility of a collision with an 
overtaking vehicle in the adjacent 
lane is high, the steering assist 
function will operate even if the turn 
signals are operating.
*: Boundary between asphalt and  the side of the road, such as 
grass, soil, or a curb
Functions included in LTA 
system 
Page 228 of 556

2285-5. Using the driving support systems
Owners Manual_USA_M62084_en
■Vehicle sway warning func-
tion
When the vehicle is swaying 
within a lane, the warning 
buzzer will sound and a mes-
sage will be displayed on the 
multi-information display to alert 
the driver.■Lane centering function
This function is linked with 
dynamic radar cruise control 
with full-speed range and pro-
vides the required assistance by 
operating the steering wheel to 
keep the vehicle in its current 
lane.
When dynamic radar cruise control 
with full-speed range is not operat-
ing, the lane centering function 
does not operate.
In situations where the white (yel-
low) lane lines are d ifficult to see or 
are not visible, such as when in a 
traffic jam, this function will operate 
to help follow a preceding vehicle 
by monitoring the position of the 
preceding vehicle. 
Page 229 of 556

2295-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
DrivingPress the LTA switch to turn the 
LTA system on.
The LTA indicator illuminates and a 
message is displaye d on the multi-
information display.
Press the LTA switch again to turn 
the LTA system off.
When the LTA system is turned on 
or off, operation of the LTA system 
continues in the same condition the 
next time the fuel cell system is 
started.
“LTA Turned ON Steering 
Assist Active”
LTA  i n d i c a t o r
The illumination condition of the 
indicator informs the driver of the 
system operation status.
Illuminated in white: LTA system is 
operating.
Illuminated in green: Steering wheel 
assistance of the steering assist 
function or lane centering function 
is operating.
Flashing in orange: Lane departure 
alert function is operating.
Operation display of steering 
wheel operation support
Displayed when the multi-informa-
tion display is swit ched to the driv-
ing support system information 
screen.
Indicates that steering wheel assis-
tance of the steering assist function 
or lane centering f unction is operat-
ing.
Both outer sides of the lane are dis-
played: Indicates that steering 
wheel assist of the lane centering 
function is operating.
Tu r n i n g   LTA  s y s t e m   o n
Indications on  multi-infor-
mation display 
Page 230 of 556

2305-5. Using the driving support systems
Owners Manual_USA_M62084_enOne outer side of the lane is dis-
played: Indicates that steering 
wheel assist of the steering assist 
function is operating.
Both outer sides of the lane are 
flashing: Alerts the driver that their 
input is necessary to stay in the 
center of the lane (lane centering 
function).
Follow-up cruising display
Displayed when the multi-informa-
tion display is switched to the driv-
ing support system information 
screen.
Indicates that steering assist of the 
lane centering function is operating 
by monitoring the position of a pre-
ceding vehicle.
When the follow-up cruising display 
is displayed, if the preceding vehi-
cle moves, your vehicle may move 
in the same way. A
lways pay care-
ful attention to your surroundings 
and operate the steering wheel as 
necessary to correct the path of the 
vehicle and ensure safety.
Lane departure alert function 
display
Displayed when the multi-informa-
tion display is switched to the driv-
ing support system information 
screen.
Inside of displayed lines is 
white
Indicates that the system is rec-
ognizing white (yellow) lines or a 
course
*. When the vehicle 
departs from its lane, the white 
line displayed on the side the 
vehicle departs from flashes 
orange.
Inside of displayed lines is 
black
Indicates that the system is not 
able to recognize white (yellow) 
lines or a course
* or is temporar-
ily canceled.
*: Boundary between asphalt and  the side of the road, such as 
grass, soil, or a curb
■Operation conditions of each 
function
●Lane departure alert function