2020 TOYOTA PRIUS C Owners Manual

2334-5. Toyota Safety Sense C
4
Driving
PRIUS c_U
WARNING
●If the brake pedal is being depressed, the system may determine that the
driver is taking evasive action and possibly delay the operation timing of
the pre-collision braking function.
● While driving, such as when driving through a railway crossing, the system
may determine that the possibility of a collision with an objec t, such as rail-
way crossing barrier, is high and operate the pre-collision bra king function.
To move the vehicle in an emergency, such as if the system operates in a
railway crossing, perform the following operations and then take the nec-
essary measures to ensure your safety.
• If the vehicle has been stopped, depress the accelerator pedal.
• If the vehicle is decelerating, fully depress the accelerator pedal.
(P. 236)
• Disable the pre-collision system. ( P. 234)
■ When to disable the pre-collision system
In the following situations, disable the system, as it may not operate prop-
erly, possibly leading to an accident resulting in death or ser ious injury:
● When the vehicle is being towed
● When your vehicle is towing another vehicle
● When transporting the vehicle via truck, boat, train or similar means of
transportation
● When the vehicle is raised on a lift with the hybrid system on and the tires
are allowed to rotate freely
● When inspecting the vehicle using a drum tester such as a chass is dyna-
mometer or speedometer tester, or when using an on vehicle whee l bal-
ancer
● If the vehicle cannot be driven in a stable manner, such as when the vehi-
cle has been in an accident or is malfunctioning
● When the vehicle is driven in a sporty manner or off-road
● When the tires are not properly inflated
● When tires of a size other than specified are installed
● When tire chains are installed
● When a compact spare tire or an emergency tire puncture repair kit is used

2344-5. Toyota Safety Sense C
PRIUS c_U■
Disabling the pre-collision system
Press the PCS switch fo
r 3 seconds or more.
The PCS warning light will turn
on and a message will be dis-
played in the multi-information
display, when the system is
turned off.
To enable the system, press the
PCS switch again.
The system is enabled each
time the power switch is turned
to the “ON” position (vehicles
without a smart key system) or
the power switch is turned to ON
mode (vehicles with a smart key
system).
■
Changing the pre-colli sion warning timing
Press the PCS switch to display the current warning timing on the
multi-Information display. Each time the PCS switch is pressed
while the current warning timing is displayed, the timing for the
warning changes as follows:
The warning timing setting is retained when the power switch is turned
off. However, if the pre-collision system is disabled and re-en abled, the
operation timing will return to the default setting (middle).
Early
Middle
This is the default setting.
Late
Changing settings of the pre-collision system
1
2
3

2354-5. Toyota Safety Sense C
4
Driving
PRIUS c_U
■Operational conditions
The pre-collision system is enabled and the system determines that the pos-
sibility of a frontal collision with a vehicle or pedestrian is high.
Each function is operational at the following speeds:
● Pre-collision warning
● Pre-collision brake assist
● Pre-collision braking
The system may not operate in the following situations:
● If a 12-volt battery terminal has been disconnected and reconnected and
then the vehicle has not been driven for a certain amount of ti me
● If the shift lever is in R
● If VSC is disabled (only the pre-collision warning function wil l be opera-
tional)
Detectable objectsVehicle speedRelative speed between your vehicle and object
VehiclesApprox. 10 to 85 mph
(15 to 140 km/h)Approx. 10 mph
(15 km/h) or more
PedestriansApprox. 10 to 40 mph
(15 to 65 km/h)Approx. 10 mph
(15 km/h) or more
Detectable objectsVehicle speedRelative speed between your vehicle and object
VehiclesApprox. 20 to 50 mph
(30 to 80 km/h)Approx. 20 mph
(30 km/h) or more
PedestriansApprox. 20 to 40 mph
(30 to 65 km/h)Approx. 20 mph
(30 km/h) or more
Detectable objectsVehicle speedRelative speed between your vehicle and object
VehiclesApprox. 7 to 50 mph
(10 to 80 km/h)Approx. 7 mph
(10 km/h) or more
PedestriansApprox. 7 to 40 mph
(10 to 65 km/h)Approx. 7 mph
(10 km/h) or more

2364-5. Toyota Safety Sense C
PRIUS c_U■
Object detection function
The system detects objects based on their size, profile, motion, etc. However,
an object may not be detected depending on the surrounding brig htness and
the motion, posture, and angle of the detected object, preventing the system
from operating properly. (P. 238)
■ Cancelation of the pre-collision braking
If either of the following occur while the pre-collision brakin g function is oper-
ating, it will be canceled:
● The accelerator pedal is depressed strongly.
● The steering wheel is turned sharply or abruptly.
■ Conditions under which the system may operate even if there is no pos-
sibility of a collision
● In some situations such as the following, the system may determ ine that
there is a possibility of a frontal collision and operate.
• When passing a detectable object, etc.
• When changing lanes while overtaking a detectable object, etc.
• When rapidly closing on a detectable object, etc.
• When approaching objects on the roadside, such as detectable o bjects,
guardrails, utility poles, trees, or walls
The illustration shows an image of detect-
able objects.
• When approaching a detectableobject in an adjacent lane or on the
roadside, such as when changing the
course of travel or driving on a wind-
ing road
• When there is a detectable object or other object by the roadside at the
entrance of a curve

2374-5. Toyota Safety Sense C
4
Driving
PRIUS c_U• When there are patterns or paint in front of your vehicle that
may be mis-
taken for a detectable object
• When the front of your vehicle is hit by water, snow, dust, et c.
• When passing a detectable object while making a right/left tur n
• When a detectable object approaches very close and then stops before
entering the path of your vehicle
• If the front of your vehicle is raised or lowered, such as whe n on an
uneven or undulating road surface
• When driving on a road surrounded by a structure, such as in a tunnel or
on an iron bridge
• When there is a laser reflecting object (manhole cover, reflec tive plate,
etc.), steps, or a protrusion in front of your vehicle
• When overtaking a detectable object
that is changing lanes or making a
right/left turn
• When passing a detectable object in an oncoming lane that is stopped to
make a right/left turn
• When the sensor is misaligned due to a strong impact being applied to the
sensor, etc.
• When the vehicle is being parked in a place where there is a low hanging
object at the height of the front sensor

2384-5. Toyota Safety Sense C
PRIUS c_U• When approaching an electric toll gate barrier, parking area b
arrier, or
other barrier that opens and closes
• When using an automatic car wash
• When driving through steam or smoke
■ Situations in which the syst em may not operate properly
● In some situations such as the following, an object may not be detected by
the radar sensor and front camera sensor, preventing the system from oper-
ating properly:
• When a detectable object is approaching your vehicle
• When your vehicle or a detectable object is wobbling
• If a detectable object makes an abrupt maneuver (such as sudde n swerv-
ing, acceleration or deceleration)
• When your vehicle approaches a detectable object rapidly
• When a detectable object is near a wall, fence, guardrail, manhole cover,
vehicle, steel plate on the road, etc.
• When a detectable object is under a structure
• When part of a detectable object is hidden by an object, such as large
baggage, an umbrella, or guardrail
• When multiple detectable objects are close together
• If the sun or other light is shining directly on a detectable object
• When a detectable object is a shade of white and looks extremely bright • When the windshield is covered with raindrops, etc.
• When driving through or under objects that may contact your vehicle,
such as thick grass, tree branches, or
a banner
• When a detectable object is not directly in front of your vehicle

2394-5. Toyota Safety Sense C
4
Driving
PRIUS c_U• When a detectable object appears to be nearly the same color o
r bright-
ness as its surroundings
• If a detectable object cuts or suddenly emerges in front of your vehicle
• When the front of your vehicle is hit by water, snow, dust, et c.
• When a very bright light ahead, such as the sun or the headlig hts of
oncoming traffic, shines directly into the front camera sensor
• When approaching the side or front of a vehicle ahead
• If a vehicle ahead is a bicycle or motorcycle
• If a vehicle ahead is narrow, such as a personal mobility vehi cle
• If a preceding vehicle has a small rear end, such as an unload ed truck
• If a vehicle ahead is carrying a load which protrudes past its rear bumper
• If a vehicle ahead is irregularly shaped, such as a tractor or side car
• If a pedestrian ahead is shorter than approximately 3.2 ft. (1 m) or taller
than approximately 6.5 ft. (2 m)
• If a pedestrian is wearing oversized clothing (a rain coat, lo ng skirt, etc.),
making their silhouette obscure
• If a pedestrian is bending forward or squatting or bicyclist i s bending for-
ward
• If a pedestrian is moving fast
• If a pedestrian is pushing a stroller, wheelchair, bicycle or other vehicle
• When driving in inclement weather such as heavy rain, fog, snow or a sandstorm
• When driving through steam or smoke
• When the surrounding area is dim, such as at dawn or dusk, or while at
night or in a tunnel, making a detectable object appear to be n early the
same color as its surroundings
• When driving in a place where the surrounding brightness changes sud- denly, such as at the entrance or exit of a tunnel
• If your vehicle is skidding • If a preceding vehicle has a low rear end, such as a low bed trailer
• If a vehicle ahead has extremely high ground clearance

2404-5. Toyota Safety Sense C
PRIUS c_U• If the wheels are misaligned
• If a wiper blade is blocking the camera sensor
• The vehicle is being driven at extremely high speeds
• When driving on a hill
• When there is a laser reflecting object (manhole cover, reflec
tive plate,
etc.), steps, or a protrusion in front of your vehicle
• If the radar sensor or camera sensor is misaligned
● In some situations such as the following, sufficient braking fo rce may not be
obtained, preventing the system from performing properly:
• If the braking functions cannot operate to their full extent, such as when
the brake parts are extremely cold, extremely hot, or wet
• If the vehicle is not properly maintained (brakes or tires are excessively
worn, improper tire inflation pressure, etc.)
• When the vehicle is being driven on a gravel road or other sli ppery sur-
face
■ If VSC is disabled
●If VSC is disabled ( P. 267), the pre-collision brake assist and pre-collision
braking functions are also disabled.
● The PCS warning light will turn on and “VSC TURNED OFF PRE-COLL I-
SION BRAKE SYSTEM UNAVAILABLE” will be displayed on the multi-i nfor-
mation display. • If the front of the vehicle is raised or
lowered