2017 TOYOTA PRIUS PLUG-IN HYBRID Owners Manual

3855-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
5
Driving
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.
WARNING
■ 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 dealer or repairer, or another duly
qualified and equipped professional.
● 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 dealer or
repairer, or another duly qualified and equipped professional.
Turning LDA system on

3865-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
LDA indicator
Illuminates when the LDA sys-
tem is on.
Steering control indicator and
operation display of steering
wheel operation support
When that steering wheel
assistance of the steering con-
trol function is operating, the
indicator illuminates and the
operation display on the multi-
information display is turned on.
Lane departure alert function display
Displayed when the multi-information display is switched to the
screen. (P. 241)
Indications on combination meter
1
2
3
Inside of displayed white lines
is whiteInside of displayed white lines
is black
Indicates that the system is recog-
nizing white (yellow) lines. When
the vehicle departs from its lane,
the white line displayed on the
side the vehicle departs from
flashes orange.Indicates that the system is not
able to recognize white (yellow)
lines or is temporarily canceled.

3875-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
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Driving
■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. 390)
●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 “ (LDA Steering Assist Mode)” in the screen of
the multi-information display is set to “On”. (P. 242)
• 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. 388)
●Vehicle sway warning
This function operates when all of the following conditions are met.
• Setting for “ (Lane Sway Warning Status)” in the screen of
the multi-information display is set to “On”. (P. 242)
• 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. 390)

3885-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)■Temporary cancelation 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. 387)
●When operation conditions are no longer met while operating the steering
control function, a buzzer may sound to indicate that a function may be tem-
porarily canceled. (P. 3 8 7 )
■Steering control function
Depending on the vehicle speed, lane departure situation, road conditions,
etc., the driver may not feel the function is operating 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 the 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 the hands off of the steering wheel, the buzzer
sounds, a warning message is displayed and the function is temporarily can-
celed. This alert also operates in the same way when the vehicle is driven
with the steering wheel lightly gripped. However, depending on the road con-
ditions, 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.

3895-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
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Driving
■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.

3905-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)■Warning message
If the following warning message is displayed on the multi-information dis-
play, follow the appropriate troubleshooting procedure.
Warning messageDetails/Actions
“Lane Departure Alert
Malfunction
Visit Your Dealer”
The system may not be operating
properly.
Have the vehicle inspected at any
authorized Toyota dealer or
repairer, or another duly qualified
and equipped professional.
“Forward Camera
System
Unavailable
Clean Windshield”
Dirt, rain, condensation, ice, snow,
etc. are present on the windshield in
front of the camera sensor.
Turn the LDA system off, remove
any dirt, rain, condensation, ice,
snow, etc. from the windshield, and
then turn the LDA system back on.
“Forward Camera
System
Unavailable”
The operation conditions of the cam-
era sensor (temperature, etc.) are not
met.
When the operation conditions of
the camera sensor (temperature,
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.
“Lane Departure Alert
Unavailable”
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
the appropriate troubleshooting
procedures for the warning mes-
sage. Afterward, drive the vehicle
for a short time, and then turn the
LDA system back on.

3915-5. Using the driving support systems
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Driving
If a different warning message is displayed, follow the instructions displayed
on the screen.
■Customization
The following settings can be changed.
For how to change settings, refer to P. 242.
“Lane Departure Alert
System is Unavailable
Below Approx.
50 km/h.”The LDA system cannot be used as
the vehicle speed is less than approxi-
mately 50 km/h (32 mph).
Drive the vehicle at approximately
50 km/h (32 mph) or more.
Warning messageDetails/Actions
FunctionSetting details
Lane departure alert functionAdjust alert sensitivity
Steering control functionTurn steering wheel assistance on and off
Vehicle sway warning functionTurn function on and off
Adjust alert sensitivity

3925-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
RSA (Road Sign Assist)
RSA recognizes specific road
signs using the camera sensor
and provides information to the
driver via the main display or
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
road signs, it alerts the driver using a warning display and warning
buzzer*.
*: This setting needs to be customized.
Summary of function
Camera sensor
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.