TOYOTA PRIUS 2017 4.G Owners Manual

PRIUS_OM_OM47B54U_(U)
3914-5. Using the driving support systems
4
Driving
WARNING
●Observe the following precautions, as the sensors may stop functioning
properly which may lead to an accident.
• Do not subject the sensor to strong shocks by hitting it, etc. The sen-
sors may not function properly.
• When using a high-pressure washer to wash the vehicle, do not spray
water directly on the sensors. Equipment may not function properly if
subjected to an impact from strong water pressure. If the vehicle
bumper strikes something, equipment may not operate properly due to
a sensor malfunction. Have the vehicle inspected at your Toyota dealer.
● In the following situations, the sensors may not operate normally and may
lead to an accident. Drive carefully.
• Obstacles cannot be detected in the side areas until a scan of the side
areas is completed. ( →P. 339)
• Even after the scan of the side areas is completed, obstacles such as other vehicles, people or animals that approach from the sides cannot
be detected.
• The sensor is frozen (if it thaws, the system returns to normal). A warning message may display at particularly low temperatures due to
the sensor freezing and it may not detect parked vehicles.
• The sensor is blocked by someone’s hand.
• The vehicle is tilted a large amount.
• The temperature is extremely hot or cold.
• The vehicle is driven on undulating r oads, slopes, gravel roads, in areas
with tall grass, etc.
• An ultrasonic wave source is nearby, such as the horn or sensors of another vehicle, a motorcycle engine or the air brake of a large vehicle.
• Heavy rain or a water strikes the vehicle.
• The angle of the sensor may be deviated when assist control starts even if there is a parked vehicle in the target parking spot. Have the
vehicle inspected at your Toyota dealer.
• Do not install any accessories within the sensor detection range.

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PRIUS_OM_OM47B54U_(U)
4-5. Using the driving support systems
Rear view monitor system
The rear view image is displayed
when the shift lever is in R and the
power switch is in ON mode.
The rear view monitor system will
be deactivated when the shift lever
is in any position other than R.
The rear view monitor system assists the driver by displaying an
image of the view behind the veh icle with fixed guide lines on
the screen while backing up, for example while parking.
The screen illustrations used in this text are intended as examples,
and may differ from the image that is actually displayed on the
screen.

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Driving
■Screen description
The rear view monitor system scr een will be displayed if the shift
lever is shifted to R while the power switch is in ON mode.
Vehicle width extension guide line
Displays a guide path when the vehicle is being backed straight up.
The displayed width is wider than the actual vehicle width.
Vehicle center guide line
This line indicates the estimated vehicle center on the ground.
Distance guide line
Displays a point approximately 1.5 ft. (0.5 m) (red) from the edge of the
bumper.
Distance guide line
Displays a point approximately 3 ft. (1 m) (blue) from the edge of the
bumper.
Using the rear view monitor system
1
2
3
4

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PRIUS_OM_OM47B54U_(U)
4-5. Using the driving support systems
■Area displayed on screen
The rear view monitor system
displays an image of the view
from the bumper of the rear
area of the vehicle.
The image adjustment proce-
dure for the rear view monitor
system screen is the same as
the procedure for adjusting the
screen. (→P. 430)
• The area displayed on the
screen may vary according to
vehicle orientation conditions.
• Objects which are close to either corner of the bumper or under
the bumper cannot be dis-
played.
• The camera uses a special lens. The distance of the image that appears
on the screen differs from the actual distance.
• Items which are located higher than the camera may not be displayed on the monitor.
Rear view monitor system precautions
Corners of bumper

PRIUS_OM_OM47B54U_(U)
3954-5. Using the driving support systems
4
Driving
■Rear view monitor system camera
The camera for the rear view
monitor system is located as
shown in the illustration.
● Using the camera
If dirt or foreign matter (such as water droplets, snow, mud etc.)
is adhering to the camera, it cannot transmit a clear image. In
this case, flush it with a large quantity of water and wipe the cam-
era lens clean with a soft and wet cloth.
■Differences between the screen and the actual road
The distance guide lines and the v ehicle width guide lines may not
actually be parallel with the dividi ng lines of the parking space, even
when they appear to be so. Be sure to check visually.
The distances between the vehicle width guide lines and the left
and right dividing lines of the parking space may not be equal, even
when they appear to be so. Be sure to check visually.
The distance guide lines give a distance guide for flat road sur-
faces. In any of the following situations, there is a margin of error
between the fixed guide lines on the screen and the actual dis-
tance/course on the road.

396
PRIUS_OM_OM47B54U_(U)
4-5. Using the driving support systems
●When the ground behind the vehicle slopes up sharply
The distance guide lines will
appear to be closer to the
vehicle than the actual dis-
tance. Because of this,
objects will appear to be far-
ther away than they actually
are. In the same way, there
will be a margin of error
between the guide lines and
the actual distance/course on
the road.
● When the ground behind the vehi cle slopes down sharply
The distance guide lines will
appear to be farther from the
vehicle than the actual dis-
tance. Because of this,
objects will appear to be
closer than they actually are.
In the same way, there will be
a margin of error between
the guide lines and the actual
distance/course on the road.

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3974-5. Using the driving support systems
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Driving
●When any part of the vehicle sags
When any part of the vehicle
sags due to the number of
passengers or the distribu-
tion of the load, there is a
margin of error between the
fixed guide lines on the
screen and the actual dis-
tance/course on the road.
■When approaching thre e-dimensional objects
The distance guide lines are displayed according to flat surfaced
objects (such as the road). It is not possible to determine the posi-
tion of three-dimensional objects (s uch as vehicles) using the vehi-
cle width guide lines and distance guide lines. When approaching a
three-dimensional object that extends outward (such as the flatbed
of a truck), be careful of the following.
● Vehicle width guide lines
Visually check the surround-
ings and the area behind the
vehicle. In the case shown
below, the truck appears to
be outside of the vehicle
width guide lines and the
vehicle does not look as if it
hits the truck. However, the
rear body of the truck may
actually cross over the vehi-
cle width guide lines. In real-
ity if you back up as guided
by the vehicle width guide
lines, the vehicle may hit the
truck.
A margin of error

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PRIUS_OM_OM47B54U_(U)
4-5. Using the driving support systems
●Distance guide lines
Visually check the surround-
ings and the area behind the
vehicle. On the screen, it
appears that a truck is park-
ing at point . However, in
reality if you back up to point
, you will hit the truck. On
the screen, it appears that
is closest and is farthest
away. However, in reality, the
distance to and is the
same, and is farther than and .
2
1
1
3
13
2
13

PRIUS_OM_OM47B54U_(U)
3994-5. Using the driving support systems
4
Driving
■If you notice any symptoms
If you notice any of the following symptoms, refer to the likely cause
and the solution, and re-check.
If the symptom is not resolved by the solution, have the vehicle
inspected by your Toyota dealer.
Things you should know
Likely causeSolution
 The image is difficult to see
• The vehicle is in a dark area
• The temperature around the lens
is either high or low
• The outside temperature is low
• There are water droplets on the camera
• It is raining or humid
• Foreign matter (mud, etc.) is adhering to the camera
• Sunlight or headlights are shining directly into the camera
• The vehicle is under fluorescent
lights, sodium lights, mercury
lights etc.
If this happens due to these causes,
it does not indicate a malfunction.
Back up while visually checking the
vehicle’s surroundings. (Use the
monitor again once conditions have
been improved.)
The procedure for adjusting the pic-
ture quality of the rear view monitor
system is the same as the proce-
dure for adjusting the screen.
 The image is blurry
Dirt or foreign matter (such as water
droplets, snow, mud, etc.) is adher-
ing to the camera.Flush the camera with a large quan-
tity of water and wipe the camera
lens clean with a soft and wet cloth.
The image is out of alignment
The camera or surrounding area has
received a strong impact.Have the vehicle inspected by your
Toyota dealer.
The fixed guide lines are very far out of alignment
The camera position is out of align-
ment.Have the vehicle inspected by your
Toyota dealer.
• The vehicle is tilted (there is a
heavy load on the vehicle, tire
pressure is low due to a tire punc-
ture, etc.)
• The vehicle is used on an incline.If this happens due to these causes,
it does not indicate a malfunction.
Back up while visually checking the
vehicle’s surroundings.

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4-5. Using the driving support systems
WARNING
■When using the rear view monitor system
The rear view monitor system is a supplemental device intended to assist
the driver when backing up. When backing up, be sure to visually check all
around the vehicle both directly and using the mirrors before proceeding.
Observe the following precautions to avoid an accident that could result in
death or serious injuries.
● Never depend on the rear view monitor system entirely when backing up.
The image and the position of the guide lines displayed on the screen may
differ from the actual state.
Use caution, just as you would when backing up any vehicle.
● Be sure to back up slowly, depressing the brake pedal to control vehicle
speed.
● The instructions given are only guide lines.
When and how much to turn the steering wheel will vary according to traf-
fic conditions, road surface conditions, vehicle condition, etc. when park-
ing. It is necessary to be fully aware of this before using the rear view
monitor system.
● When parking, be sure to check that the parking space will accommodate
your vehicle before maneuvering into it.
● Do not use the rear view monitor system in the following cases:
• On icy or slick road surfaces, or in snow
• When using tire chains or emergency tires
• When the back door is not closed completely
• On roads that are not flat or straight, such as curves or slopes
● In low temperatures, the screen may darken or the image may become
faint. The image could distort when the vehicle is moving, or you may
become unable to see the image on the screen. Be sure to visually check
all around the vehicle both directly and using the mirrors before proceed-
ing.
● If the tire sizes are changed, the position of the fixed guide lines displayed
on the screen may change.
● The camera uses a special lens. The distances between objects and
pedestrians that appear in the image displayed on the screen will differ
from the actual distances. ( →P. 395)