sensor TOYOTA PRIUS 2023 Service Manual

3744-5. Using the driving support systems
PRIUS_OM_OM47F32E_(EE)■Conditions under which the system may not function correctly
●The Blind Spot Monitor function may not detect vehicles correctly in the fol-
lowing situations:
• When the sensor is misaligned due to a strong impact to the sensor or its
surrounding area
• When mud, snow, ice, a sticker, etc. is covering the sensor or surround-
ing area on the rear bumper
• When driving on a road surface that is wet with standing water during bad
weather, such as heavy rain, snow, or fog
• When multiple vehicles are approaching with only a small gap between
each vehicle
• When the distance between your vehicle and a following vehicle is short
• When there is a significant difference in speed between your vehicle and
the vehicle that enters the detection area
• When the difference in speed between your vehicle and another vehicle
is changing
• When a vehicle enters a detection area traveling at about the same
speed as your vehicle
• As your vehicle starts from a stop, a vehicle remains in the detection area
• When driving up and down consecutive steep inclines, such as hills, dips
in the road, etc.
• When driving on roads with sharp bends, consecutive curves, or uneven
surfaces
• When vehicle lanes are wide, or when driving on the edge of a lane, and
the vehicle in an adjacent lane is far away from your vehicle
• When a bicycle carrier or other accessory is installed to the rear of the
vehicle
• When there is a significant difference in height between your vehicle and
the vehicle that enters the detection area
• Immediately after the Blind Spot Monitor function is turned on
●Instances of the Blind Spot Monitor function unnecessarily detecting a vehi-
cle and/or object may increase in the following situations:
• When the sensor is misaligned due to a strong impact to the sensor or its
surrounding area
• When the distance between your vehicle and a guardrail, wall, etc. that
enters the detection area is short
• When driving up and down consecutive steep inclines, such as hills, dips
in the road, etc.
• When vehicle lanes are narrow, or when driving on the edge of a lane,
and a vehicle traveling in a lane other than the adjacent lanes enters the
detection area
• When driving on roads with sharp bends, consecutive curves, or uneven
surfaces
• When the tires are slipping or spinning
• When the distance between your vehicle and a following vehicle is short
• When a bicycle carrier or other accessory is installed to the rear of the
vehicle

3754-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)
The Rear Crossing Traffic Alert functions when your vehicle is in
reverse. It can detect other vehicles approaching from the right or left
rear of the vehicle. It uses radar sensors to alert the driver of the other
vehicle’s existence through flashing the outside rear view mirror indi-
cators and sounding a buzzer.
The Rear Crossing Traffic Alert function
Approaching vehicles Detection areas
WARNING
■ Cautions regarding the use of the system
There is a limit to the degree of recognition accuracy and control perfor-
mance that this system can provide, do not overly rely on this system. The
driver is always responsible for paying attention to the vehicle’s surround-
ings and driving safely. ( P. 373)
■ To ensure the system can operate properly
 P. 371
12

3774-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)
■The Rear Crossing Traffic Alert function is operational when
● The BSM system is set to on. (P. 153)
● The shift position is in R.
● Vehicle speed is less than approximately 8 km/h (5 mph).
● Approaching vehicle speed is between approximately 8 km/h (5 mph) and
28 km/h (18 mph).
■ Conditions under which the system will not detect a vehicle
The Rear Crossing Traffic Alert function is not designed to detect the follow-
ing types of vehicles and/or objects:
● Vehicles approaching from directly behind
● Vehicles backing up in a parking space next to your vehicle
● Guardrails, walls, signs, parked vehicles and similar stationary objects*
●Small motorcycles, bicycles, pedestrians, etc.*
●Vehicles moving away from your vehicle
● Vehicles approaching from the parking spaces next to your vehicle*
●The distance between the sensor and approaching vehicle gets too close
*: Depending on the conditions, detection of a vehicle and/or object may
occur.
● Vehicles that the sensors cannot detect
due to obstructions

3784-5. Using the driving support systems
PRIUS_OM_OM47F32E_(EE)
■ Situations in which the system may not operate properly
The Rear Crossing Traffic Alert function may not detect vehicles correctly in
the following situations:
● When the sensor is misaligned due to a strong impact to the sensor or its
surrounding area
● When mud, snow, ice, a sticker, etc. is covering the sensor or surrounding
area on the position above the rear bumper
● When driving on a road surface that is wet with standing water during bad
weather, such as heavy rain, snow, or fog
● When multiple vehicles are approaching with only a small gap between
each vehicle
● When a vehicle is approaching at high speed
● When equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an additional trim strip, etc.), bicycle carrier, or
snow plow
● When towing a trailer
● When there is a significant difference in height between your vehicle and the
vehicle that enters the detection area
● When a sensor or the area around a sensor is extremely hot or cold
● If the suspension has been modified or tires of a size other than specified
are installed
● When backing up on a slope with a
sharp change in grade
● When backing out of a sharp angle park-
ing spot

3794-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)
● If the front of the vehicle is raised or lowered due to the carried load
■ Situations in which the system may operate even if there is no possibil-
ity of a collision
Instances of the Rear Crossing Traffic Alert function unnecessarily detecting
a vehicle and/or object may increase in the following situations:
● When equipment that may obstruct a sensor is installed, such as a towing
eyelet, bumper protector (an additional trim strip, etc.), bicycle carrier, or
snow plow
● When turning while backing up
● When a vehicle turns into the detection
area
● When the parking space faces a street
and vehicles are being driven on the
street
● When the distance between your vehicle
and metal objects, such as a guardrail,
wall, sign, or parked vehicle, which may
reflect electrical waves toward the rear
of the vehicle, is short

3804-5. Using the driving support systems
PRIUS_OM_OM47F32E_(EE)
● When there are spinning objects near your vehicle such as the fan of an air
conditioning unit
● When water is splashed or sprayed toward the rear bumper, such as from a
sprinkler
● Moving objects (flags, exhaust fumes, large rain droplets or snowflakes, rain
water on the road surface, etc.)
● When the distance between your vehicle and a guardrail, wall, etc., that
enters the detection area is short
● Gratings and gutters
● When a sensor or the area around a sensor is extremely hot or cold
● If the suspension has been modified or tires of a size other than specified
are installed
● If the front of the vehicle is raised or lowered due to the carried load
● When a vehicle passes by the side of
your vehicle
● When a detected vehicle turns while
approaching the vehicle

381
4
4-5. Using the driving support systems
Driving
PRIUS_OM_OM47F32E_(EE)
Toyota parking assist-sensor
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors
Front side sensors
Rear side sensors
The Toyota parking assist-sensor
can be enabled/disabled on the
screen ( P. 153) of the
multi-information display.
When on is selected, Toyota park-
ing assist-sensor indicator will
come on.
Once off is selected, the Toyota parking assist-sensor will not return to on
until it is turned to on by the screen of multi-information display again.
(The system does not automatically return to on even when the hybrid sys-
tem is restarted.)
: If equipped
The distance from your vehicle to nearby obstacles when paral-
lel parking or maneuvering into a garage is measured by the
sensors and communicated via the displays and a buzzer.
Always check the surrounding area when using this system.
Types of sensors
1
2
3
4
5
6
Turning the Toyota parking assist-sensor on/off

3824-5. Using the driving support systems
PRIUS_OM_OM47F32E_(EE)
When the sensors detect an obstacle, the following displays inform
the driver of the position and distance to the obstacle.
■Multi-information display
Front center sensor opera-
tion
Front corner sensor opera-
tion
Front side sensor operation
Rear side sensor operation
Rear corner sensor operation
Rear center sensor operation
• The operation display is gray when the sensors are operating.
• The front side sensor operation displays and rear side sensor operation
displays are not shown until a scan of the side areas is completed.
■
Audio system screen
When the Toyota parking assist
monitor
* is displayed:
A simplified image is displayed
on the right upper corner of the
audio system screen when an
obstacle is detected.
*: If equipped
Display
1
2
3
4
5
6

3834-5. Using the driving support systems
4
Driving
PRIUS_OM_OM47F32E_(EE)■
Distance display
Sensors that detect an obstacle will illuminate continuously or blink.
Sensor detection display, obstacle distance
Multi-informa-
tion display
*
Audio system
screen
*
Approximate distance to obstacle
Front corner,
front center and
front side
sensorsRear corner,
rear center and
rear side
sensors
(continuous)(blinking
slowly)
100 cm (3.3 ft.)
to 60 cm (2.0 ft)150 cm (4.9 ft.)
to 60 cm
(2.0 ft.)
(continuous)(blinking)
60 cm (2.0 ft.)
to 45 cm (1.5 ft)
60 cm (2.0 ft.)
to 45 cm
(1.5 ft.)
100 cm (3.3 ft.)
to 70 cm (2.3 ft.)
100 cm (3.3 ft.)
to 70 cm (2.3 ft.)
60 cm (2.0 ft.)
to 45 cm
(1.5 ft.)
60 cm (2.0 ft.)
to 45 cm (1.5 ft)
(continuous)(blinking
rapidly)
45 cm (1.5 ft.) to
35 cm (1.2 ft.)
45 cm (1.5 ft.)
to 35 cm
(1.2 ft.)
70 cm (2.3 ft.) to
30 cm (1.0 ft.)
70 cm (2.3 ft.) to
30 cm (1.0 ft.)
45 cm (1.5 ft.)
to 35 cm
(1.2 ft.)
45 cm (1.5 ft.) to
35 cm (1.2 ft.)
(blinking)(continuous)
Less than
35 cm (1.2 ft.)
Less than
35 cm (1.2 ft.)
Less than
30 cm (1.0 ft.)Less than
30 cm (1.0 ft.)
Less than
35 cm (1.2 ft.)
Less than
35 cm (1.2 ft.)
Far
Near
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5
6
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2
3
4
5
6
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6

3844-5. Using the driving support systems
PRIUS_OM_OM47F32E_(EE)
*: The images may differ from those shown in the illustrations depending on
the detection status. (P. 382)
Front center sensors
Front corner sensors
Front side sensorsRear side sensors
Rear corner sensors
Rear center sensors1
2
3
4
5
6