display TOYOTA YARIS HATCHBACK 2021 Workshop Manual

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4-5. Using the driving support systems
Driving
■Certifications for the Toyota Safety Sense
→P. 5 2 0
■If a warning message is displayed on the multi-information display
A system may be temporarily unavailable or there may be a malfunction in the sys-
tem.
●In the following situations, perform the actions specified in the table. When the nor-
mal operating conditions are detected, the message will disappear and the system
will become operational.
If the message does not disappear, contact any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
●In the following situations, if the situation has changed (or the vehicle has been
SituationActions
When the area around a camera is cov-
ered with dirt, moisture (fogged up, cov-
ered with condensation, ice, etc.), or
other foreign matterUsing the wiper and A/C function,
remove the dirt and other attached mat-
ter. (→P.280, 285).
When the temperature around the front
camera is outside of the operational
range, such as when the vehicle is in the
sun or in an extremely cold environment
If the front camera is hot, such as after
the vehicle had been parked in the sun,
use the air conditioning system to
decrease the temperature around the
front camera.
If a sunshade was used when the vehicle
was parked, depending on its type, the
sunlight reflected from the surface of the
sunshade may cause the temperature of
the front camera to become excessively
high.
If the front camera is cold, such after the
vehicle is parked in an extremely cold
environment, use the air conditioning
system to increase the temperature
around the front camera.
The area in front of the front camera is
obstructed, such as when the hood is
open or a sticker is attached to the part of
the windshield in front of the front cam-
era.
Close the hood, remove the sticker, etc.,
to clear the obstruction.
When “Pre-Collision System Radar In
Self Calibration Unavailable See
Owner’s Manual” is displayed.Check whether there is attached materi-
als on the radar and radar cover, and if
there is, remove it.

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4-5. Using the driving support systems
driven for some time) and the normal operating conditions are detected, the mes-
sage will disappear and the system will become operational.
If the message does not disappear, contact any authorized Toyota retailer or Toyota
authorized repairer, or any reliable repairer.
• When the temperature around the radar sensor is outside of the operational range,
such as when the vehicle is in the sun or in an extremely cold environment
• When the front camera cannot detect objects in front of the vehicle, such as when
driving in the dark, snow, or fog, or when bright lights are shining into the front
camera
• Depending on the conditions in the vicinity of the vehicle, the radar may judge the
surrounding environment can not be properly recognized. In that case, “Pre-Colli-
sion System Unavailable See Owner’s Manual” is displayed.

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4-5. Using the driving support systems
Driving
*: If equipped
The system can detect the follow-
ing (The detectable objects differs
depending on the function.):
zVehicles
zBicyclists
zPedestrians
■Pre-collision warning
When the system determines that
the possibility of a frontal collision is
high, a buzzer will sound and a
warning message will be displayed
on the multi-information display to
urge the driver to take evasive
action.
■Pre-collision brake assist
When the system determines that
the possibility of a frontal collision is
high, the system applies greater
braking force in relation to how
strongly the brake pedal is
depressed.
■Pre-collision braking
If the system determines that the
possibility of a frontal collision is
extremely high, the brakes are
automatically applied to help avoid
the collision or reduce the impact of
the collision.
■Emergency steering assist
If the system determines that the
possibility of a collision with a
pedestrian is high and the driver
has begun evasive maneuver or
PCS (Pre-Collision Sys-
tem)
*
The pre-collision system uses
a radar sensor and front cam-
era to detect objects (→P.193)
in front of the vehicle. When
the system determines that the
possibility of a frontal collision
with an object is high, a warn-
ing operates to urge the driver
to take evasive action and the
potential brake pressure is
increased to help the driver
avoid the collision. If the sys-
tem determines that the possi-
bility of a frontal collision with
an object is extremely high, the
brakes are automatically
applied to help avoid the colli-
sion or help reduce the impact
of the collision.
The pre-collision system can
be disabled/enabled and the
warning timing can be
changed. (→P.196)
Detectable objects
System functions

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4-5. Using the driving support systems
■Enabling/disabling the pre-col-
lision system
The pre-collision system can be
enabled/disabled on ( →P.422)
of the multi-information display.
The system is automatically enabled
each time the engine switch is turned to
ON.
If the system is disabled, the PCS
warning light will turn on and a
message will be displayed on the
multi-information display.
■Changing the pre-collision
warning timing
The pre-collision warning timing
can be changed on ( →P.422) of
the multi-information display.
The warning timing setting is retained
when the engine switch is turned off.
However, if the pre-collision system is
disabled and re-enabled, the operation
timing will return to the default setting
(middle).
WARNING
●When transporting the vehicle via truck, boat, train or similar means of
transportation
●When the vehicle is raised on a lift
with the engine running and the tires are allowed to rotate freely
●When inspecting the vehicle using a drum tester such as a chassis dynamometer or speedometer tes-
ter, or when using an on vehicle wheel balancer
●When a strong impact is applied to the front bumper or front grille, due to an accident or other reasons
●If the vehicle cannot be driven in a stable manner, such as when the
vehicle has been in an accident or is malfunctioning
●When the vehicle is driven in a sporty manner or off-road
●When the tires are not properly inflated
●When the tires are very worn
●When tires of a size other than
specified are installed
●When tire chains are installed
●When a compact spare tire or an emergency tire puncture repair kit is
used
●If equipment (snow plow, etc.) that
may obstruct the radar sensor or front camera is temporarily installed to the vehicle
Changing settings of the
pre-collision system

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4-5. Using the driving support systems
Driving
• If the braking functions cannot operate
to their full extent, such as when the
brake parts are extremely cold,
extremely hot, or wet
• If the vehicle is not properly main-
tained (brakes or tires are excessively
worn, improper 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.270), the pre-
collision brake assist and pre-collision
braking functions are also disabled.
●The PCS warning light will turn on and
“VSC Turned OFF Pre-Collision Brake
System Unavailable” will be displayed
on the multi-information display.
*: If equipped
LTA (Lane Tracing
Assist)
*
When driving on highways and
freeways with white (yellow)
lane lines, this function alerts
the driver when the vehicle
might depart from its lane or
course
* and provides assis-
tance by operating the steering
wheel to keep the vehicle in its
lane or course
*. Furthermore,
the system provides steering
assistance when dynamic
radar cruise control is operat-
ing to keep the vehicle in its
lane.
The LTA system recognizes
white (yellow) lane lines or a
course
* using the front cam-
era. Additionally, it detects pre-
ceding vehicles using the front
camera and radar.
*: Boundary between asphalt and the
side of the road, such as grass,
soil, or a curb

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4-5. Using the driving support systems
Driving
WARNING
●When the follow-up cruising dis- play is displayed ( →P.209) and the
preceding vehicle changes lanes. (Your vehicle may follow the pre-ceding vehicle and also change
lanes.)
●When the follow-up cruising dis-
play is displayed ( →P.209) and the preceding vehicle is swaying. (Your vehicle may sway accordingly and
depart from the lane.)
●When the follow-up cruising dis-
play is displayed ( →P.209) 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.209) and the preceding vehicle is being driven
extremely close to the left/right lane line. (Your vehicle may follow the preceding vehicle 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 (yel- low) lines, etc., are present due to
road repair.
●There are shadows on the road that
run parallel with, or cover, the white (yellow) lines.

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4-5. Using the driving support systems
■Lane centering function
This function is linked with dynamic
radar cruise control and provides
the required assistance by operat-
ing the steering wheel to keep the
vehicle in its current lane.
When dynamic radar cruise control is
not operating, the lane centering func-
tion does not operate.
In situations where the white (yellow)
lane lines are difficult 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.
■Changing the lane centering
function ON/OFF condition
The lane centering function turns
ON/OFF each time the LTA switch
is pressed.
The LTA settings state is displayed on
the multi-information display when the
LTA switch is pressed.
Also, the LTA function can be turned
ON/OFF with on the multi-informa-
tion display. ( →P.422)
LTA system setting

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4-5. Using the driving support systems
Driving
Lane centering function ON
“LTA Steering Assist Active Lane
Centering Active”
Lane centering function OFF
“LTA Steering Assist Active”
■Turning the LTA system OFF
Press and hold the LTA switch
The LTA indicator light turns off when
the LTA is turned OFF.
Press the switch again to turn the sys-
tem on.
The LTA is turned ON each time the
engine switch is turned to ON.
However, the lane centering function
keeps either the ON/OFF state prior to
the engine switch being turned OFF.
LTA indicator
The illumination condition of the indica-
tor 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 func-
tion or lane centering function is operat-ing.
Flashing in orange: Lane departure
alert function is operating.
Operation display of steering
wheel operation support
Displayed when the multi-information
display is switched to the driving sup-
port system information screen.
Indicates that steering wheel assis-
tance of the steering assist function or
lane centering function is operating.
Both outer sides of the lane are dis-
played: Indicates that steering wheel
assist of the lane centering function is
operating.
One outer side of the lane is displayed:
Indicates that steering wheel assist of
the steering assist function is operating.
Both outer sides of the lane are flash-
ing: 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-information
display is switched to the driving sup-
port system information screen.
Indicates that steering assist of the lane
centering function is operating by moni-
toring the position of a preceding vehi-
cle.
When the follow-up cruising display is
displayed, if the preceding vehicle
moves, your vehicle may move in the
same way. Always pay careful 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
Indications on multi-infor-
mation display

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4-5. Using the driving support systems
Displayed when the multi-information
display is switched to the driving sup-
port system information screen.
Inside of displayed lines is white
Indicates that the system is recog-
nizing white (yellow) lines or a
course
*. When the vehicle departs
from its lane, the white line dis-
played 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 temporarily can-
celed.
*: Boundary between asphalt and the
side of the road, such as grass, soil,
or a curb
■Operation conditions of each func-
tion
●Lane departure alert function
This function operates when all of the
following conditions are met.
• LTA is turned on.
• Vehicle speed is approximately 50
km/h (32 mph) or more.
*1
• System recognizes white (yellow) lane
lines or a course*2. (When a white
[yellow] line or course*2 is recognized
on only one side, the system will oper-
ate only for the recognized side.)
• Width of traffic lane is approximately 3
m (9.8 ft.) or more.
• Turn signal lever is not operated.
(Vehicle with BSM: Except when
another vehicle is in the lane on the side
where the turn signal was operated)
• Vehicle is not being driven around a
sharp curve.
• No system malfunctions are detected.
(→P.212)
*1: The function operates even if the
vehicle speed is less than approxi-
mately 50 km/h (32 mph) when the
lane centering function is operating.
*2: Boundary between asphalt and the
side of the road, such as grass, soil,
or a curb
●Steering assist function
This function operates when all of the
following conditions are met in addition
to the operation conditions for the lane
departure alert function.
• Vehicle is not accelerated or deceler-
ated by a fixed amount or more.
• Steering wheel is not operated with a
steering force level suitable for chang-
ing lanes.
• ABS, VSC, TRC and PCS are not
operating.
• TRC or VSC is not turned off.
• Hands off steering wheel warning is
not displayed. (→P.212)
●Vehicle sway warning function

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Driving
This function operates when all of the
following conditions are met.
• Setting for “Sway Warning” in of
the multi-information display is set to
“ON”. (→P.422)
• Vehicle speed is approximately 50
km/h (32 mph) or more.
• Width of traffic lane is approximately 3
m (9.8 ft.) or more.
• No system malfunctions are detected.
(→P.212)
●Lane centering function
This function operates when all of the
following conditions are met.
• LTA is turned on.
• Setting for “Lane Center” in of the
multi-information display are set to
“ON” (→P.422)
• This function recognizes white (yel-
low) lane lines or the position of a pre-
ceding vehicle (except when the
preceding vehicle is small, such as a
motorcycle).
• The dynamic radar cruise control is
operating in vehicle-to-vehicle dis-
tance control mode.
• Width of traffic lane is approximately 3
to 4 m (10 to 13 ft.).
• Turn signal lever is not operated.
• Vehicle is not being driven around a
sharp curve.
• No system malfunctions are detected.
(→P.212)
• Vehicle does not accelerate or decel-
erate by a fixed amount or more.
• Steering wheel is not operated with a
steering force level suitable for chang-
ing lanes.
• ABS, VSC, TRC and PCS are not
operating.
• TRC or VSC is not turned off.
• Hands off steering wheel warning is
not displayed. (→P.212)
• The vehicle is being driven in the
center of a lane.
• Steering assist function is not operat-
ing.
■Temporary cancelation of functions
●When operation conditions are no lon-
ger met, a function may be temporar-
ily canceled. However, when the
operation conditions are met again,
operation of the function is automati-
cally restored. (→P.210)
●If the operation conditions (→P.210)
are no longer met while the lane cen-
tering function is operating, the steer-
ing wheel may vibrate and the buzzer
may sound to indicate that the func-
tion has been temporarily canceled.
However, if the alert types customiza-
tion setting is set to steering wheel
vibration, the system will notify the
driver by vibrating the steering wheel
instead of sounding the buzzer.
■Steering assist function/lane cen-
tering function
●Depending on the vehicle speed, lane
departure situation, road conditions,
etc., the driver may not feel the func-
tion is operating or the function may
not operate at all.
●The steering control of the function is
overridden by the driver’s steering
wheel operation.
●Do not attempt to test the operation of
the steering assist function.
■Lane departure alert function
●The warning buzzer may be difficult to
hear due to external noise, audio play-
back, etc. Also, it may be difficult to
feel steering wheel vibrations due to
the road conditions, etc.
●If the edge of the course* is not clear
or straight, the lane departure alert
function may not operate.
●Vehicle with BSM: It may not be possi-
ble for the system to determine if there
is a danger of a collision with a vehicle
in an adjacent lane.
●Do not attempt to test the operation of
the lane departure alert function.
*: Boundary between asphalt and the
side of the road, such as grass, soil,