Toyota C-HR Hybrid (2017 year). Instruction — part 18
4-5. Using the driving support systems
289
LDA (Lane Departure Alert with steering
control)
Summary of functions
When driving on highways and freeways with white (yellow) lines, this
function alerts the driver when the vehicle might depart from its lane
and provides assistance by operating the steering wheel to keep the
vehicle in its lane.
The LDA system recognizes visi-
ble white (yellow) lines with the
camera sensor on the upper por-
tion of the front windshield.
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: If equipped
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Functions included in LDA system
◆ Lane departure alert function
When the system determines
that the vehicle might depart
from its lane, a warning is dis-
played on the multi-information
display and the warning buzzer
sounds to alert the driver.
When the warning buzzer
sounds, check the surrounding
road situation and carefully
operate the steering wheel to
move the vehicle back to the
center within the white (yellow)
lines.
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◆ Steering control function
When the system determines
that the vehicle might depart
from its lane, the system pro-
vides assistance as necessary
by operating the steering wheel
in small amounts for a short
period of time to keep the vehi-
cle in its lane.
If the system detects that the
steering wheel has not been
operated for a fixed amount of
time or the steering wheel is not
being firmly gripped, a warning
is displayed on the multi-infor-
mation display and the function
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is temporarily canceled.
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◆ Vehicle sway warning
When the vehicle is swaying or
appears as if it may depart from
its lane multiple times, the
warning buzzer sounds and a
message is displayed on the
multi-information display to alert
the driver.
WARNING
■ Before using LDA system
Do not rely solely upon the LDA system. The LDA system does not auto-
matically 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 surround-
ing conditions 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 careful attention
may lead to an accident, resulting in death or serious injury.
■ To avoid operating LDA system by mistake
When not using the LDA system, use the LDA switch to turn the system off.
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WARNING
■ Situations unsuitable for LDA system
Do not use the LDA system in the following situations.
The system may not operate properly and lead to an accident, resulting in
death or serious injury.
● A compact spare tire (if equipped), tire chains, etc., are equipped.
● When the tires have been excessively worn, or when the tire inflation pres-
sure is low.
● Tires which differ by structure, manufacturer, brand or tread pattern are
used.
●Objects or patterns that could be mistaken for white (yellow) lines are
present on the side of the road (guardrails, curbs, reflective poles, etc.).
● Vehicle is driven on a snow-covered road.
●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.
● Asphalt repair marks, white (yellow) line marks, etc., are present due to
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road repair.
● Vehicle is driven in a temporary lane or restricted lane due to construction
work.
● Vehicle is driven on a road surface which is slippery due to rainy weather,
fallen snow, freezing, etc.
● Vehicle is driven in traffic lanes other than on highways and freeways.
● Vehicle is driven in a construction zone.
● Vehicle is towing a trailer or another vehicle.
■ Preventing LDA system malfunctions 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, kangaroo bar, etc.).
● If your windshield needs repairs, contact any authorized Toyota retailer or
Toyota authorized repairer, or any reliable repairer.
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Turning LDA system on
Press the LDA switch to turn the
LDA system on.
The LDA indicator illuminates and
a message is displayed on the
multi-information display.
Press the LDA switch again to turn
the LDA system off.
When the LDA system is turned on
or off, operation of the LDA system
continues in the same condition
the next time the hybrid system is
started.
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Indications on multi-information display
1
LDA indicator
The illumination condition of the
indicator informs the driver of the
system operation status.
Illuminated in white:
LDA system is operating.
Illuminated in green:
Steering wheel assistance of the
steering control function is operat-
ing.
Flashing in orange:
Lane departure alert function is
operating.
2
Operation display of steering wheel operation support
4
Indicates that steering wheel assistance of the steering control
function is operating.
3
Lane departure alert function display
Displayed when the multi-information display is switched to the driving
assist system information screen.
Inside of displayed white lines is
Inside of displayed white lines is
white:
black:
Indicates that the system is recog-
Indicates that the system is not
nizing white (yellow) lines. When
able to recognize white (yellow)
the vehicle departs from its lane,
lines or is temporarily canceled.
the white line displayed on the
side the vehicle departs from
flashes orange.
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■ Operation conditions of each function
● Lane departure alert function
This function operates when all of the following conditions are met.
• LDA is turned on.
• Vehicle speed is approximately 50 km/h (32 mph) or more.
• System recognizes white (yellow) lines.
• Width of traffic lane is approximately 3 m (9.8 ft.) or more.
• Turn signal lever is not operated.
• Vehicle is driven on a straight road or around a gentle curve with a radius
of more than approximately 150 m (492 ft.).
• No system malfunctions are detected. (P. 299)
●Steering control function
This function operates when all of the following conditions are met in addi-
tion to the operation conditions for the lane departure alert function.
• Setting for “
Steering Assist” in
screen of the multi-information
display is set to on. (P. 129)
• Vehicle is not accelerated or decelerated by a fixed amount or more.
• Steering wheel is not operated with a steering force level suitable for
changing lanes.
• ABS, VSC, TRC and PCS are not operating.
• TRC or VSC is not turned off.
• Hands off steering wheel alert is not displayed. (P. 297)
● Vehicle sway warning
This function operates when all of the following conditions are met.
• Setting for “
Alert” in
screen of the multi-information display is
set to on. (P. 129)
• 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. 299)
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■ Temporary cancellation of functions
When operation conditions are no longer met, a function may be temporarily
canceled. However, when the operation conditions are met again, operation
of the function is automatically restored. (P. 296)
■Steering control function
Depending on the vehicle speed, lane departure situation, road conditions,
etc., the operation of the functions may not be recognized or the function may
not operate at all.
■ Lane departure alert function
The warning buzzer may be difficult to hear due to external noise, audio play-
back, etc.
■ Hands off steering wheel alert
When the system determines that the driver has removed their hands from
the steering wheel while the steering control function is operating, a warning
message is displayed on the multi-information display.
If the driver continues to keep their hands off of the steering wheel, the
buzzer sounds, a warning message is displayed and the function is temporar-
4
ily canceled. This alert also operates in the same way when the vehicle is
driven with the steering wheel lightly gripped. However, depending on the
road conditions, etc., the function may not cancel.
■ White (yellow) lines are only on one side of road
The LDA system will not operate for the side on which white (yellow) lines
could not be recognized.
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■ Conditions in which functions may not operate properly
In the following situations, the camera sensor may not detect white (yellow)
lines and various functions may not operate normally.
● 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 surface that is wet due to rain, puddles, 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.
● 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 suddenly,
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 where the road diverges, merges, etc.
● 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 vehicle is driven around a sharp curve.
● The traffic lane is excessively narrow or wide.
● The vehicle is extremely tilted due to carrying heavy luggage or having
improper tire pressure.
●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).
●The headlight lenses are dirty and emit a faint amount of light at night, or the
beam axis has deviated.
● The vehicle is struck by a crosswind.
● The vehicle has just changed lanes or crossed an intersection.
● Snow tires, etc., are equipped.
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■ Warning message
If the following warning message is displayed on the multi-information dis-
play, follow the appropriate troubleshooting procedure.
Warning message
Details/Actions
The system may not be operating
properly.
“Lane Departure Alert
Have the vehicle inspected at any
Malfunction.
authorized Toyota retailer or Toyota
Visit Your Dealer.”
authorized repairer, or any reliable
repairer.
Dirt, rain, condensation, ice, snow,
etc., are present on the windshield in
front of the camera sensor.
“Front Camera Vision Blocked.
Turn the LDA system off, remove
Clean and Demist Windshield.”
any dirt, rain, condensation, ice,
snow, etc., from the windshield, and
then turn the LDA system back on.
4
The operation conditions of the cam-
era sensor (temperature, etc.) are not
met.
When the operation conditions of
“Front Camera
the camera sensor
(temperature,
Unavailable.”
etc.) are met, the LDA system will
become available. Turn the LDA
system off, wait for a little while,
and then turn the LDA system back
on.
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Warning message
Details/Actions
The LDA system is temporarily can-
celed due to a malfunction in a sensor
other than the camera sensor.
Turn the LDA system off and follow
“LDA Unavailable.”
the appropriate troubleshooting
procedures for warning message.
Afterward, drive the vehicle for a
short time, and then turn the LDA
system back on.
The LDA system cannot be used as
the vehicle speed is approximately
“LDA Unavailable Below
less than 50 km/h (32 mph).
Approx. 50km/h (32 MPH).”
Drive the vehicle at approximately
50 km/h (32 mph) or more.
If a different warning message is displayed, follow the instructions displayed
on the screen.
■ Customization
The following settings can be changed.
Function
Setting details
Lane departure alert function
Adjust alert sensitivity
Steering control function
Turn steering wheel assistance on and off
Turn function on and off
Vehicle sway warning
Adjust alert sensitivity
For how to change settings, refer to P. 679.
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RSA (Road Sign Assist)
Summary of function
RSA recognizes specific road
signs using the camera sensor
and provides information to the
driver via the multi-information
display.
If the system judges that the vehicle is being driven over the speed
limit, performing prohibited actions, etc., in relation to the recognized
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road signs, it alerts the driver using a warning display and warning
buzzer*.
*: This setting needs to be customized.
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 replacement for a driver’s
own vision and awareness. Drive safely by always paying careful attention
to the traffic rules.
Inappropriate or negligent driving could lead to an unexpected accident.
: If equipped
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Indication on the multi-information display
After the camera sensor recognizes a sign, it is displayed on the multi-
information display when the vehicle passes the sign.
● When the driving assist system
information is selected, a maxi-
mum of 3 signs can be dis-
played. (P. 303)
● When other than the driving
assist system information is
selected, a speed limit sign or
an all canceled sign can be dis-
played. (P. 303)
A no overtaking sign and a speed
limit sign with supplemental mark
are not displayed. However, if
signs other than speed limit signs
are recognized, they are men-
tioned in a stack under the current
speed limit sign.
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Types of recognized road signs
The following types of road signs, including electronic signs and blink-
ing signs, are recognized.
A non-official (not meeting the Vienna Convention) or a recently intro-
duced traffic sign may not be recognized.
Type
Multi-information display
Speed limit begins/ends
Highway entrance/exit
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Wet
Speed limit with
supplemental
Rain
mark
(Displayed simul-
taneously with
speed limit)
Ice
On/off ramp*
(Display example)
Supplemental
mark exists
(Contents not rec-
ognized)
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Type
Multi-information display
No overtaking begins/ends
All canceled
(All restrictions canceled. Returns to
default road regulation.)
*: If the turn signal indicator is not operated when changing lanes, the mark
does not display.
Warning display
In the following situations, the RSA system alerts the driver using a
warning display.
● When the vehicle speed exceeds the speed warning threshold
applied to the speed limit of the sign displayed on the multi-informa-
tion display, the sign color becomes inverted.
● If it is detected that your vehicle is overtaking when a no overtaking
sign is displayed on the multi-information display, the sign flashes.
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■ Automatic turn-off of RSA sign display
One or more signs automatically turn off in the following situations.
● A new sign is not recognized for a certain distance.
● The road changes due to a left or right turn, etc.
■ Conditions in which the function may not operate or detect correctly
In the following situations, RSA does not operate normally and may not rec-
ognize signs, display the incorrect sign, etc. However, this does not indicate a
malfunction.
● The camera sensor is misaligned due to a strong impact being applied to
the sensor, etc.
● Dirt, snow, stickers, etc., are on the windshield near the camera sensor.
● In inclement weather such as heavy rain, fog, snow or sand storms
● Light from an oncoming vehicle, the sun, etc., enters the camera sensor.
● The sign is dirty, faded, tilted or bent, and if an electronic sign, the contrast
is poor.
4
●All or part of the sign is hidden by the leaves of a tree, a pole, etc.
● The sign is only visible to the camera sensor for a short amount of time.
● The driving scene (turning, lane change, etc.) is judged incorrectly.
● Even if it is a sign not appropriate for the currently traveled lane, such a 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 compatible sign is recognized.
● The vehicle is driven in a country with a different direction of traffic.
●Side road speed signs may be detected and displayed (if positioned in sight
of the camera sensor) while the vehicle is traveling on the main road.
● Roundabout exit road speed signs may be detected and displayed (if posi-
tioned in sight of the camera sensor) while traveling on a roundabout.
● The speed information displayed on the meter and that displayed on the
navigation system (if equipped) may be different due to the navigation sys-
tem using map data.
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