TOYOTA PRIUS PRIME 2022 Owners Manual

PRIUS PRIME_OM_OM47E74U_(U)
4315-5. Using the driving support systems
5
Driving
WARNING
■To ensure the system can operate properly
● Keep the sensor and its surrounding area on the bumper clean at all times.
● Do not subject a sensor or its surrounding area on the rear bumper to a
strong impact.
If a sensor is moved even slightly off position, the system may malfunction
and vehicles may not be detected correctly.
In the following situations, have your vehicle inspected by your Toyota
dealer.
• A sensor or its surrounding area is subject to a strong impact .
• If the surrounding area of a sensor is scratched or dented, or part of them has become disconnected.
● Do not disassemble the sensor.
● Do not attach accessories or stickers to the sensor or surrounding area on
the bumper.
● Do not modify the sensor or surrounding area on the bumper.
● Do not paint the rear bumper any color other than an official Toyota color.
One Blind Spot Monitor sensor is
installed inside the left and right side of
the vehicle rear bumper respectively.
Observe the following to ensure the Blind
Spot Monitor can function correctly.

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PRIUS PRIME_OM_OM47E74U_(U)
5-5. Using the driving support systems
The Blind Spot Monitor function uses radar sensors to detect ve hicles
that are traveling in an adjacent lane in the area that is not reflected in
the outside rear view mirror (the blind spot), and advises the driver of
the vehicle’s existence via the outside rear view mirror indica tor.
The areas that vehicles can be detected in are outlined below.
The range of the detecti on area extends to:
Approximately 11.5 ft. (3.5 m)
from the side of the vehicle
The first 1.6 ft. (0.5 m) from the
side of the vehicle is not in the
detection area
Approximately 9.8 ft. (3 m) from
the rear bumper
Approximately 3.3 ft. (1 m) for-
ward of the rear bumper
The Blind Spot Monitor function
The Blind Spot Monitor f unction detection areas
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1
2
3

PRIUS PRIME_OM_OM47E74U_(U)
4335-5. Using the driving support systems
5
Driving
■The Blind Spot Monitor function is operational when
●The BSM system is set to on ( P. 246)
● Vehicle speed is greater than approximately 10 mph (16 km/h)
■ The Blind Spot Monitor functio n will detect a vehicle when
● A vehicle in an adjacent lane overtakes your vehicle.
● You overtake a vehicle in adjacent lane slowly.
● Another vehicle enters the detection area when it changes lanes.
■ Conditions under which the system will not detect a vehicle
The Blind Spot Monitor function is not designed to detect the following types
of vehicles and/or objects:
●Small motorcycles, bicycles, pedestrians etc.
*
●Vehicles traveling in the opposite direction
● Guardrails, walls, signs, parked vehicles and similar stationary objects
*
●Following vehicles that are in the same lane*
●Vehicles driving 2 lanes across from your vehicle*
●Vehicles which are being overtaken rapidly by your vehicle*
*
: Depending on conditions, detection of a vehicle and/or object may occur.
WARNING
■Cautions regarding the use of the system
The driver is solely responsible for safe driving. Always drive safely, taking
care to observe your surroundings.
The Blind Spot Monitor function is a supplementary function which alerts the
driver that a vehicle is present in the blind spot. Do not over ly rely on the
Blind Spot Monitor function. The function cannot judge if it is safe to change
lanes, therefore over reliance could cause an accident resultin g in death or
serious injury.
According to conditions, the system may not function correctly. Therefore
the driver’s own visual confirmation of safety is necessary.

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PRIUS PRIME_OM_OM47E74U_(U)
5-5. Using the driving support systems
■Conditions under which the system may not function correctly
●The Blind Spot Monitor function may not detect vehicles correct ly in the fol-
lowing situations:
• When the sensor is misaligned due to a strong impact to the se nsor 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 b etween
each vehicle
• When the distance between your vehicle and a following vehicle is short
• When there is a significant difference in speed between your v ehicle 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 d etection 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 dete cting a vehi-
cle and/or object may increase in the following situations:
• When the sensor is misaligned due to a strong impact to the se nsor 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 h ills, 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

PRIUS PRIME_OM_OM47E74U_(U)
4355-5. Using the driving support systems
5
Driving
The Rear Cross 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 o ther vehi-
cle’s existence through flashing the outside rear view mirror i ndicators
and sounding a buzzer.
The Rear Cross Traffic Alert function
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Approaching vehicles Detection areas
WARNING
■Cautions regarding the use of the system
There is a limit to the degree of recognition accuracy and cont rol perfor-
mance that this system can provide, do not overly rely on this system. The
driver is always responsible for paying attention to the vehicl e’s surround-
ings and driving safely. ( P. 433)
■ To ensure the system can operate properly
 P. 431
12

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PRIUS PRIME_OM_OM47E74U_(U)
5-5. Using the driving support systems
The areas that vehicles can be detected in are outlined below.
To give the driver a more consistent time to react, the buzzer can alert
for faster vehicles from farther away.
Example:
■ The Rear Cross Traffic Alert f unction is operational when
● The BSM system is set to on. ( P. 246)
● The shift position is in R.
● Vehicle speed is less than approximately 5 mph (8 km/h).
● Approaching vehicle speed is between approximately 5 mph (8 km/ h) and
18 mph (28 km/h).
The Rear Cross Traffic Aler t function detection areas
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Approaching vehicleSpeedApproximate
alert distance
Fast18 mph (28 km/h)65 ft. (20 m)
Slow5 mph (8 km/h)18 ft. (5.5 m)
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PRIUS PRIME_OM_OM47E74U_(U)
4375-5. Using the driving support systems
5
Driving
■Conditions under which the system will not detect a vehicle
The Rear Cross Traffic Alert function is not designed to detect the following
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 stationar y objects
*
●Small motorcycles, bicycles, pedestrians, etc.*
●Vehicles moving away from your vehicle
● Vehicles approaching from the parking spaces next to your vehic le
*
●The distance between the sensor and approaching vehicle gets to o close
*: Depending on the conditions, detection of a vehicle and/or obj ect may
occur.
■ Situations in which the syst em may not operate properly
The Rear Cross Traffic Alert function may not detect vehicles c orrectly 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 be tween
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.), bicy cle carrier, or
snow plow
●
Vehicles that the sensors cannot detect
due to obstructions
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PRIUS PRIME_OM_OM47E74U_(U)
5-5. Using the driving support systems
●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 c old
● If the suspension has been modified or tires of a size other th an specified
are installed
● If the front of the vehicle is raised or lowered due to the car ried load
●
When backing up on a slope with a
sharp change in grade
● When backing out of a sharp angle park-
ing spot
● When turning while backing up
● When a vehicle turns into the detection
area

PRIUS PRIME_OM_OM47E74U_(U)
4395-5. Using the driving support systems
5
Driving
■Situations in which the system may operate even if there is no possibil-
ity of a collision
Instances of the Rear Cross Traffic Alert function unnecessaril y 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.), bicy cle carrier, or
snow plow
● When there are spinning objects near your vehicle such as the f an 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 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
● When a vehicle passes by the side of
your vehicle
● When a detected vehicle turns while
approaching the vehicle

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PRIUS PRIME_OM_OM47E74U_(U)
5-5. Using the driving support systems
●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 c old
● If the suspension has been modified or tires of a size other th an specified
are installed
● If the front of the vehicle is raised or lowered due to the car ried load