2020 TOYOTA GR YARIS Owners Manual (in English)

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4-5. Using the driving support systems
Driving
• The brake pedal is depressed.
●Intersection right/left turn assistance (pre-collision warning) (for region A)
When the turn signal lights are not flashing, support for turning left or right at an inter-
section which targets oncoming vehicles does not work.
●Intersection right/left turn assistance (pre-collision braking) (for region A)
When the turn signal lights are not flashing, support for turning left or right at an inter-
section which targets oncoming vehicles does not work.
■Object detection function
The system detects objects based on
their size, profile, motion, etc. However,
an object may not be detected depend-
ing on the surrounding brightness and
the motion, posture, and angle of the
detected object, preventing the system
from operating properly. (→P.169)
The illustration shows an image of
detectable objects.
Region A
Region B
■Conditions under which the system
may operate even if there is no pos-
sibility of a collision
●In some situations such as the follow-
ing, the system may determine that
there is a possibility of a frontal colli-
sion and operate.
• When passing a detectable object,
etc.
• When changing lanes while overtak-
ing a detectable object, etc.
Detectable
objectsVehicle speedOncoming vehicle
speedRelative speed
between your vehicle
and object
Ve hi cl e sApprox. 10 to 25 km/h
(7 to 15 mph)Approx. 30 to 55 km/h
(20 to 35 mph)Approx. 40 to 80 km/h
(25 to 50 mph)
PedestriansApprox. 10 to 25 km/h
(7 to 15 mph)-Approx. 10 to 25 km/h
(7 to 15 mph)
Detectable
objectsVehicle speedOncoming vehicle
speedRelative speed
between your vehicle
and object
Ve hi cl e sApprox. 15 to 25 km/h
(10 to 15 mph)Approx. 30 to 45 km/h
(20 to 28 mph)Approx. 45 to 70 km/h
(28 to 43 mph)
PedestriansApprox. 10 to 25 km/h
(7 to 15 mph)-Approx. 10 to 25 km/h
(7 to 15 mph)

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• When approaching a detectable
object in an adjacent lane or on the roadside, such as when changing the course of travel or driving on a wind-
ing road
• When rapidly closing on a detectable
object, etc. • When approaching objects on the roadside, such as detectable objects,
guardrails, utility poles, trees, or walls • When there is a detectable object or other object by the roadside at the
entrance of a curve
• When there are patterns or paint in
front of your vehicle that may be mis- taken for a detectable object• When the front of your vehicle is hit by
water, snow, dust, etc. • When overtaking a detectable object that is changing lanes or making a
right/left turn
• When passing a detectable object in
an oncoming lane that is stopped to make a right/left turn
• When a detectable object approaches
very close and then stops before entering the path of your vehicle• If the front of your vehicle is raised or
lowered, such as when on an uneven or undulating road surface• When driving on a road surrounded by
a structure, such as in a tunnel or on an iron bridge• When there is a metal object (man-
hole cover, steel plate, etc.), steps, or a protrusion in front of your vehicle• When passing under an object (road
sign, billboard, etc.)
• When approaching an electric toll gate
barrier, parking area barrier, or other barrier that opens and closes• When using an automatic car wash
• When driving through or under objects that may contact your vehicle, such as thick grass, tree branches, or a ban-
ner
• When driving through steam or smoke
• When driving near an object that

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4-5. Using the driving support systems
Driving
reflects radio waves, such as a large
truck or guardrail
• When driving near a TV tower, broad-
casting station, electric power plant,
radar equipped vehicles, etc., or other
location where strong radio waves or
electrical noise may be present
• 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.)
• For region A: While making a right/left
turn, when an oncoming vehicle or a
crossing pedestrian has already
exited the path of your vehicle
• For region A: While making a right/left
turn, closely in front of an oncoming
vehicle or a crossing pedestrian.
• For region A: While making a right/left
turn, when an oncoming vehicle or a
crossing pedestrian stops before
entering the path of your vehicle
• For region A: While making a right/left
turn, when an oncoming vehicle turns
right/left in front of your vehicle
• For region A: While steering into the
direction of oncoming traffic
■Situations in which the system may
not operate properly
●In some situations such as the follow-
ing, an object may not be detected by
the radar sensor and front camera,
preventing the system from operating
properly:
• When a detectable object is
approaching your vehicle
• When your vehicle or a detectable
object is wobbling
• If a detectable object makes an abrupt
maneuver (such as sudden swerving,
acceleration or deceleration)• When your vehicle approaches a
detectable object rapidly
• When a detectable object is not
directly in front of your vehicle
• When a detectable object is near a
wall, fence, guardrail, manhole cover,
vehicle, steel plate on the road, etc.
• When a detectable object is under a
structure
• 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 suddenly
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 oncom-
ing 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

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4-5. Using the driving support systems
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
• For region A: 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.)
• For region A: If a pedestrian/or the rid-
ing height of a bicyclist ahead is
shorter than approximately 1 m (3.2
ft.) or taller than approximately 2 m
(6.5 ft.)
• For region A: If a pedestrian/bicyclist
is wearing oversized clothing (a rain
coat, long skirt, etc.), making their sil-
houette obscure
• For region A: If a pedestrian is bend-
ing forward or squatting or bicyclist is
bending forward
• For region A: If a pedestrian/bicyclist
is moving fast
• For region A: If a pedestrian is push-
ing 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 detect-
able object appear to be nearly the
same color as its surroundings
• When driving in a place where the sur-
rounding brightness changes sud-
denly, such as at the entrance or exit
of a tunnel
• After the engine has started the vehi-
cle 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
• For region A: When driving in a traffic
lane separated by more than one lane
where oncoming vehicles are driving
while making a right/left turn
• For region A: When largely out of
place with the opposite facing tar-
geted oncoming vehicle during a
right/left turn

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4-5. Using the driving support systems
Driving
• For region A: While making a right/left
turn, when a pedestrian approaches
from behind or side of your vehicle
●For region A: In addition to the above,
in some situations, such as the follow-
ing, the emergency steering assist
may not operate.
• For region A: When the white (yellow)
lane lines are difficult to see, such as
when they are faint, diverging/merg-
ing, or a shadow is cast upon them
• For region A: When the lane is wider
or narrower than normal
• For region A: When there is a light
and dark pattern on the road surface,
such as due to road repairs
• For region A: When a pedestrian is
detected near the centerline of the
vehicle
• For region A: When the target is too
close
• For region A: When there is insuffi-
cient safe or unobstructed space for
the vehicle to be steered into
• For region A: If oncoming vehicle is
present
• For region A: If VSC function is oper-
ating
●In some situations such as the follow-
ing, sufficient braking force or steering
force (for region A) 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,
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.220), 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.

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4-5. Using the driving support systems
*: If equipped
While driving on a road with clear
white (yellow) lane lines, the LTA
system warns the driver if the vehi-
cle 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 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
WARNING
■Before using LTA system
●Do not rely solely upon the LTA sys-
tem. The LTA system does not automatically drive the vehicle 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 attention to the surrounding conditions and operating the steering wheel to cor-
rect 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 driv-
ing operations and pay careful 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. Fail-ure to do so may lead to an accident,
resulting in death or serious injury.
●Vehicle is driven on a road surface
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 con-
struction work.
●Vehicle is driven in a construction
zone.
●A spare tire, tire chains, etc., are
equipped.
●When the tires have been exces-
sively worn, or when the tire infla- tion pressure is low.

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4-5. Using the driving support systems
Driving
WARNING
●When your vehicle is towing a trailer or during emergency towing
■Preventing LTA system malfunc-tions and operations performed
by mistake
●Do not modify the headlights or place stickers, etc., on the surface
of the lights.
●Do not modify the suspension, etc.
If the suspension, etc., needs to be replaced, contact any authorized Toyota retailer or Toyota authorized
repairer, or any reliable repairer.
●Do not install or place anything on
the hood or grille. Also, do not install a grille guard (bull bars, kan-garoo bar, etc.).
●If your windshield needs repairs, contact any authorized Toyota
retailer or Toyota authorized repairer, or any reliable repairer.
■Conditions in which functions may not operate properly
In the following situations, the func-
tions may not operate properly 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.
●When the follow-up cruising dis- play is displayed ( →P.177) 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.177) 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.177) 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.177) 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.).

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4-5. Using the driving support systems
WARNING
●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.
●The vehicle is driven in an area without white (yellow) lines, such as in front of a tollgate or checkpoint,
or at an intersection, etc.
●The white (yellow) lines are
cracked, “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 sur-face that is wet due to rain, pud-dles, etc.
●The traffic lines 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 surface
that is bright due to reflected light, etc.
●The vehicle is driven in an area where the brightness changes sud-denly, such as at the entrances and
exits of tunnels, etc.
●Light from the headlights 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 winding road.
●The vehicle is driven on an unpaved or rough road.
●The traffic lane is excessively nar-row or wide.
●The vehicle is extremely tilted due to carrying heavy luggage or having improper tire pressure.
●The distance to the preceding vehi-cle is extremely short.
●The vehicle is moving up and down a large amount due to road condi-
tions during driving (poor roads or road seams).