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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.
Page 391 of 744
3915-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
5
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
Page 392 of 744
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.
Page 393 of 744
3935-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
5
Driving
After the camera sensor recognizes a sign, it is displayed on the main
display or multi-information display when the vehicle passes the sign.
●When the driving assist system
information is selected in multi-
information display, a maximum
of 2 signs can be displayed on
the multi-information display.
(P. 215)
●When other than the driving
assist system information is
selected, speed limit sign or an
all canceled sign can be dis-
played on the main display.
(P. 207)
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.
Indication on the main display or multi-information display
Page 394 of 744
3945-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
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 introduced
traffic sign may not be recognized.
*: If the turn signal indicator is not operated when changing lanes, the mark
does not display.
Types of recognized road signs
Typ eMulti-information display
Speed limit begins/ends
Speed limit with
supplemental
mark
(Displayed simul-
taneously with
speed limit)
(Display example)
Wet
Rain
Ice
On/off ramp*
Supplemental
mark exists
(Contents not rec-
ognized)
No overtaking begins/ends
All canceled
(All restrictions canceled. Returns to
default road regulation.)
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3955-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
5
Driving
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 main display
or multi-information 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.
Depending on the situation, traffic environment (traffic direction,
speed, unit) may be detected incorrectly and a warning display may
not operate properly.
■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.
●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.
Warning display
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3965-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)●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 may be different due to the navigation system using map
data.
■When driving vehicle in country with different speed unit
Since RSA recognizes signs based on the set unit of the meter, it is neces-
sary to change the set unit of the meter. Adjust the set unit of the meter to the
speed unit of signs in the current location. (P. 242)
■Turning the system on/off
The RSA can be enabled/disabled on the screen (P. 242) of the multi-
information display.
■Speed limit sign display
If the power switch was last turned off while a speed limit sign was displayed
on the main display or multi-information display, the same sign displays again
when the power switch is turned to ON mode.
■Customization
Setting (e.g. speeding warning threshold) can be changed. (Customizable
feature: P. 708)
Page 397 of 744
3975-5. Using the driving support systems
PRIUS PHV_OM_OM47A89E_(EE)
5
Driving
Dynamic radar cruise controlwith full-speed
range
In vehicle-to-vehicle distance control mode, the vehicle automatically
accelerates, decelerates and stops to match the speed changes of the
preceding vehicle even if the accelerator pedal is not depressed. In
constant speed control mode, the vehicle runs at a fixed speed.
Use the dynamic radar cruise control with full-speed range on free-
ways and highways.
●Vehicle-to-vehicle distance control mode (P. 400)
●Constant speed control mode (P. 407)
Vehicle-to-vehicle distance but-
ton
Indicators
Display
Set speed
Cruise control switch
Summary of functions
1
2
3
4
5