2022 TOYOTA MIRAI Owners Manual

2335-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
Depending on the vehicle condition
and road conditions, the warning
may not operate. Also, if the system
determines that the vehicle is driv-
ing around a curv e, warnings will
occur earlier than during straight-
lane driving.
●When the system determines that
the driver is driving without hold-
ing the steering wheel while the
steering wheel assist of the steer-
ing assist function is operating.
If the driver continues to keep their
hands off of the steering wheel and
the steering wheel assist is operat-
ing, the buzzer sounds and the
driver is warned. Each time the
buzzer sounds, the continuing time
of the buzzer becomes longer.
The buzzer also sounds even if the
alert type is set to .
■Vehicle sway warning function
When the system de termines that
the vehicle is swaying while the
vehicle sway warning function is
operating, a buzzer sounds and a
warning message urging the driver
to rest and the symbol shown in the
illustration are sim ultaneously dis-
played on the multi-information dis-
play.
Depending on the vehicle and road
conditions, the warning may not
operate.
■Warning message
If the follo wing warning message is
displayed on the multi-information display and the LTA indicator illumi-
nates in orange, follow the appropri-
ate troubleshooting procedure. Also,
if a different warning message is
displayed, follow the instructions
displayed on the screen.
●“LTA Malfunction Visit Your
Dealer”
The system may not be operating
properly. Have the vehicle inspected
by your Toyota dealer.
●“LTA Unavailable”
The system is temporarily canceled
due to a malfunction in a sensor
other than the front camera. Turn
the LTA system off, wait for a little
while, and then tu rn the LTA system
back on.
●“LTA Unavailable at Current
Speed”
The function cannot be used as the
vehicle speed exceeds the LTA
operation range. Drive slower.
■Customization
Function settings can be changed.
(Customizable features: P.498)

2345-5. Using the driving support systems
Owners Manual_USA_M62084_en
*: If equipped
The RSA system recognizes
specific road signs using the
front camera and/or navigation
system (when speed limit infor-
mation is available) to provide
information to the driver via the
display.
When the front camera recog-
nizes a sign and/or information
of a sign is available from the
navigation system, the sign will be displayed on the multi-infor-
mation display.

When the driving support sys-
tem information display is
selected, a maximum of 3
signs can be displayed.
( P.100)
 When a tab other than the
driving support system infor-
mation is selected, the follow-
ing types of road signs will be
displayed. ( P.100)
• Speed limit sign
• Do Not Enter sign (when notifica-
tion is necessary)
If signs other than speed limit signs
are recognized, they will be dis-
played in an overlapping stack
under the current speed limit sign.
RSA (Road Sign
Assist)*
Summary of function
WARNING
■Before using the RSA
Do not rely solely upon the RSA
system. RSA is a system which
supports the driver by providing
information, but it is not a replace-
ment for a driver’s own vision and
awareness. Drive safely by
always paying careful attention to
the traffic rules.
Indication on the multi-
information display

2355-5. Using the driving support systems
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5
Driving
The following types of road
signs, including electronic signs
and blinking signs, are recog-
nized.
A non-official or a recently intro-
duced traffic sign may not be recog-
nized.
In the following situations, the
RSA system will notify the
driver.
 When the vehicle speed
exceeds the speed notifica-
tion threshold of the speed
limit sign displayed, the sign
display will be emphasized
and a buzzer will sound.
 When the RSA system recog-
nizes a do not enter sign and
determines that your vehicle
has entered a no-entry area,
the displayed sign will flash
and a buzzer will sound. Depending on the situation, a
notification function may not
operate properly.
■Setting procedure
1 Press or of the meter
control switches and select .
2 Press or of the meter
control switch es and select
“ RSA”, then press .
■Automatic turn-off of RSA sign
display
In the following si tuations, a dis-
played speed limit sign and/or do
not enter sign will stop being dis-
played automatically:
●No sign has been recognized for a
certain distance.
●The road changes due to a left or
right turn, etc.
In the following situations, stop and
yield signs will stop being displayed
automatically:
●The system determines that your
vehicle has passed the sign.
●The road changes due to a left or
right turn, etc.
■Conditions in which the func-
tion may not operate or detect
correctly
In the following si tuations, RSA
does not operate normally and may
not recognize signs, display the
incorrect sign, etc. However, this
does not indicate a malfunction.
●The front camera is misaligned
due to a strong impact being
applied to the sensor, etc.
●Dirt, snow, sticker s, etc., are on
the windshield near the front cam-
era.
●In inclement weather such as
heavy rain, fog, snow or sand
storms
Supported types of road
signs
Speed limit
Do Not Enter
Stop
Yield
Notification function

2365-5. Using the driving support systems
Owners Manual_USA_M62084_en
●Light from an oncoming vehicle,
the sun, etc., enters the front cam-
era.
●The sign is dirty, faded, tilted or
bent.
●The contrast of electronic sign is
low.
●All or part of the sign is hidden by
the leaves of a tree, a pole, etc.
●The sign is only visible to the front
camera for a short amount of time.
●The driving scene (turning, lane
change, etc.) is judged incorrectly.
●If a sign not appropriate for the
currently traveled lane, but the
sign exists directly after a freeway
branches, or in an adjacent lane
just before merging.
●Stickers are attached to the rear of
the preceding vehicle.
●A sign resembling a system com-
patible sign is recognized.
●Side road speed signs may be
detected and displayed (if posi-
tioned in sight of the front camera)
while the vehicle is traveling on
the main road.
●Roundabout exit road speed signs
may be detected and displayed (if
positioned in sight of the front
camera) while traveling on a
roundabout.
●The front of the vehicle is raised or
lowered due to the carried load.
●The surrounding brightness is not
sufficient or changes suddenly.
●When a sign intended for trucks,
etc., is recognized.
●The navigation system map data
is outdated.
●The navigation system is not oper-
ating.
●The speed information displayed
on the meter and on the naviga-
tion system may be different due
to the navigation system using
map data.
■Speed limit sign display
If the power switch was last turned
off while a speed limit sign was dis-
played on the multi-information dis-
play, the same sig n displays again
when the power switch is turned to
ON.
■If “RSA Malfunction Visit Your
Dealer” is shown
The system may be malfunctioning.
Have the vehicle inspected by your
Toyota dealer.
■Customization
Some functions can be customized.
(Customizable features: P.498)

2375-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
In vehicle-to-vehicle distance
control mode, the vehicle auto-
matically accelerates, deceler-
ates and stops to match the
speed changes of the preceding
vehicle even if the accelerator
pedal is not depressed. In con-
stant speed control mode, the
vehicle runs at a fixed speed.
Use the dynamic radar cruise
control with full-speed range on
freeways and highways.
 Vehicle-to-vehicle distance
control mode ( P.240)
 Constant speed control mode
( P.245)
■Meter display
Multi-information display
Set speed
Indicators
■Operation switches
Vehicle-to-vehicle distance
switch
“+RES” switch
Cruise control main switch
Cancel switch
“-SET” switchDynamic radar cruise
control with full-speed
range
Summary of functions
System Components
WARNING
■Before using dynamic radar
cruise control with full-speed
range
●Driving safely is the sole
responsibility of the driver. Do
not rely solely on the system,
and drive safely by always pay-
ing careful attent ion to your sur-
roundings.
●The dynamic radar cruise con-
trol with full-speed range pro-
vides driving assistance to
reduce the driver’s burden.
However, there are limitations to
the assistance provided.
Read the followin g conditions
carefully. Do not overly rely on
this system and always drive
carefully.
• When the sensor may not be correctly detecting the vehicle
ahead: P. 2 4 7

2385-5. Using the driving support systems
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WARNING

2395-5. Using the driving support systems
Owners Manual_USA_M62084_en
5
Driving
WARNING
●Assisting the driver to operate
the vehicle
The dynamic radar cruise control
with full-speed range does not
include function s which will pre-
vent or avoid collisions with vehi-
cles ahead of your vehicle.
Therefore, if there is ever any
possibility of da nger, the driver
must take immediate and direct
control of the vehicle and act
appropriately in order to ensure
the safety of all involved.
■Situations unsuitable for
dynamic radar cruise control
with full-speed range
Do not use dynamic radar cruise
control with full-speed range in
any of the following situations.
Doing so may result in inappropri-
ate speed control and could
cause an accident resulting in
death or serious injury.
●Roads where there are pedes-
trians, cyclists, etc.
●In heavy traffic
●On roads with sharp bends
●On winding roads
●On slippery roads, such as
those covered with rain, ice or
snow
●On steep downhills, or where
there are sudden changes
between sharp up and down
gradients
Vehicle speed may exceed the
set speed when driving down a
steep hill.
●At entrances to freeways and
highways
●When weather conditions are
bad enough that they may pre-
vent the sensors from detecting
correctly (fog, snow, sand-
storm, heavy rain, etc.)
●When there is rain, snow, etc.,
on the front surface of the radar
or front camera
●In traffic conditions that require
frequent repeated acceleration
and deceleration
●During emergency towing
●When an approach warning
buzzer is heard often

2405-5. Using the driving support systems
Owners Manual_USA_M62084_en
This mode employs a radar to detect the presence of vehicles up to
approximately 328 ft. (100 m) ahead, determines the current vehicle-
to-vehicle following distance, and operates to maintain a suitable fol-
lowing distance from the vehicle ahead. The desired vehicle-to- vehi-
cle distance can also be set by operating the vehicle-to-vehicl e
distance switch.
When driving on downhill slopes, t he vehicle-to-vehicle distance may
become shorter.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver.
Example of deceleration crui sing and follow-up cruising
When a preceding vehicle driving slower than the set speed
appears
When a vehicle is detected runni ng ahead of you, the system automatically
decelerates your vehicle. When a greater reduction in vehicle s peed is nec-
essary, the system applies the brakes (the stop lights will come on at this
time). The system will respond to changes in the speed of the vehicle
ahead in order to maintain the vehicle-to-vehicle distance set by the driver.
Approach warning warns you when the system cannot decelerate suffi-
ciently to prevent your vehicle from closing in on the vehicle ahead.
When the vehicle ahead of you st ops, your vehicle will also stop (vehicle is
stopped by system control). Afte r the vehicle ahead starts off, pressing the
“+RES” switch or depressing the accelerator pedal (start-off operation) will
resume follow-up cruising. If the start-off operation is not pe rformed, system
Driving in vehicle-to-vehicle distance control mode