Toyota Corolla (2019 year). Instruction - part 14

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Two types of sensors, located behind the front grille and windshield,
detect information necessary to operate the drive assist systems.

Radar sensor
Camera sensor

Sensors

WARNING

■

To avoid malfunction of the radar sensor
Observe the following precautions.
Otherwise, the radar sensor may not operate properly, possibly leading to
an accident resulting in death or serious injury.

●

Keep the radar sensor and front grille emblem clean at all times.

●

Do not attach accessories, stickers (including transparent stickers) or
other items to the radar sensor, front grille emblem or surrounding area.

●

Do not subject the radar sensor or surrounding area to a strong impact.
If the radar sensor, front grille, or front bumper has been subjected to a
strong impact, have the vehicle inspected by your Toyota dealer.

●

Do not disassemble the radar sensor.

●

Do not modify or paint the radar sensor, front grille emblem or surrounding
area.

●

If the radar sensor, front grille, or front bumper needs to be removed and
installed, or replaced, contact your Toyota dealer.

Radar sensor
Front grille emblem

If the front of the radar sensor or the
front or back of the front grille emblem
is dirty or covered with water droplets,
snow, etc., clean it.
Clean the radar sensor and front grille
emblem with a soft cloth so you do not
mark or damage them.

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WARNING

■

To avoid malfunction of the camera sensor
Observe the following precautions.
Otherwise, the camera sensor may not operate properly, possibly leading to
an accident resulting in death or serious injury.

●

Keep the windshield clean at all times.
• If the windshield is dirty or covered with an oily film, water droplets,

snow, etc., clear the windshield.

• If a glass coating agent is applied to the windshield, it will still be neces-

sary to use the windshield wipers to remove water droplets, etc. from
the area of the windshield in front of the camera sensor.

• If the inner side of the windshield where the camera sensor is installed

is dirty, contact your Toyota dealer.

B: Approximately 7.9 in. (20 cm) (Approximately 4.0 in. [10 cm] to the right

and left from the center of the camera sensor)

●

If the part of the windshield in front of the camera sensor is fogged up or
covered with condensation or ice, use the windshield defogger to remove
the fog, condensation or ice. (

P. 368, 376)

●

If water droplets cannot be properly removed from the area of the wind-
shield in front of the camera sensor by the windshield wipers, replace the
wiper insert or wiper blade.
If the wiper inserts or wiper blades need to be replaced, contact your
Toyota dealer.

●

Do not attach window tinting to the windshield.

●

Replace the windshield if it is damaged or cracked.
If the windshield needs to be replaced, contact your Toyota dealer.

●

Do not get the camera sensor wet.

●

Do not allow bright lights to shine into the camera sensor.

●

Do not dirty or damage the camera sensor.
When cleaning the inside of the windshield, do not allow glass cleaner to
contact the lens. Also, do not touch the lens.
If the lens is dirty or damaged, contact your Toyota dealer.

●

Do not attach objects, such as stickers,
transparent stickers, and so forth, to the
outer side of the windshield in front of
the camera sensor (shaded area in the
illustration).
A: From the top of the windshield to

approximately 0.4 in. (1 cm) below
the bottom of the camera sensor

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WARNING

●

Do not subject the camera sensor to a strong impact.

●

Do not change the installation position or direction of the camera sensor or
remove it.

●

Do not disassemble the camera sensor.

●

Do not modify any components of the vehicle around the camera sensor
(inside rear view mirror, etc.) or ceiling.

●

Do not attach any accessories that may obstruct the camera sensor to the
hood, front grille or front bumper. Contact your Toyota dealer for details.

●

If a surfboard or other long object is to be mounted on the roof, make sure
that it will not obstruct the camera sensor.

●

Do not modify the headlights or other lights.

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■

Certification

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◆

Pre-collision warning

When  the  system  determines
that  the  possibility  of  a  frontal
collision  is  high,  a  buzzer  will
sound and a warning message
will  be  displayed  on  the  multi-
information  display  to  urge  the
driver to take evasive action.

◆

Pre-collision brake assist

When the system determines that the possibility of a frontal colli-
sion is high, the system applies greater braking force in relation to
how strongly the brake pedal is depressed.

◆

Pre-collision braking

When the system determines that the possibility of a frontal colli-
sion is high, the system warns the driver. If the system determines
that the possibility of a collision is extremely high, the brakes are
automatically applied to help avoid the collision or reduce the colli-
sion speed.

PCS (Pre-Collision System)

The pre-collision system uses a radar sensor and camera sen-
sor to detect vehicles and pedestrians in front of your vehicle.
When the system determines that the possibility of a frontal col-
lision with a vehicle or pedestrian is high, a warning operates to
urge the driver to take evasive action and the potential brake
pressure is increased to help the driver avoid the collision. If the
system determines that the possibility of a frontal collision with
a vehicle or pedestrian is extremely high, the brakes are auto-
matically applied to help avoid the collision or help reduce the
impact of the collision.

The pre-collision system can be disabled/enabled and the warning
timing can be changed. (

P. 217)

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WARNING

■

Limitations of the pre-collision system

●

The driver is solely responsible for safe driving. Always drive safely, taking
care to observe your surroundings.
Do not use the pre-collision system instead of normal braking operations
under any circumstances. This system will not prevent collisions or lessen
collision damage or injury in every situation. Do not overly rely on this sys-
tem. Failure to do so may lead to an accident, resulting in death or serious
injury.

●

Although this system is designed to help avoid a collision or help reduce
the impact of the collision, its effectiveness may change according to vari-
ous conditions, therefore the system may not always be able to achieve
the same level of performance.
Read the following conditions carefully. Do not overly rely on this system
and always drive carefully.
• Conditions under which the system may operate even if there is no pos-

sibility of a collision:

P. 219

• Conditions under which the system may not operate properly:

P. 222

●

Do not attempt to test the operation of the pre-collision system yourself, as
the system may not operate properly, possibly leading to an accident.

■

Pre-collision braking

●

When the pre-collision braking function is operating, a large amount of
braking force will be applied.

●

If the vehicle is stopped by the operation of the pre-collision braking func-
tion, the pre-collision braking function operation will be canceled after
approximately 2 seconds. Depress the brake pedal as necessary.

●

The pre-collision braking function may not operate if certain operations are
performed by the driver. If the accelerator pedal is being depressed
strongly or the steering wheel is being turned, the system may determine
that the driver is taking evasive action and possibly prevent the pre-colli-
sion braking function from operating.

●

In some situations, while the pre-collision braking function is operating,
operation of the function may be canceled if the accelerator pedal is
depressed strongly or the steering wheel is turned and the system deter-
mines that the driver is taking evasive action.

●

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.

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WARNING

■

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 serious 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 engine running and the tires
are allowed to rotate freely

●

When inspecting the vehicle using a drum tester such as a chassis dyna-
mometer or speedometer tester, or when using an on vehicle wheel bal-
ancer

●

When a strong impact is applied to the front bumper or front grille, due to
an accident or other reasons

●

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 the tires are very worn

●

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

●

If equipment (snow plow, etc.) that may obstruct the radar sensor or cam-
era sensor is temporarily installed to the vehicle

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■

Enabling/disabling the pre-collision system
The pre-collision system can be enabled/disabled on the settings
display (

P. 93) of the multi-information display.

The system is automatically enabled each time the engine switch is
turned to the “ON” position (vehicles without a smart key system) or
IGNITION ON mode (vehicles with a smart key system).

If  the  system  is  disabled,  the
PCS  warning  light  will  turn  on
and  a  message  will  be  dis-
played  on  the  multi-information
display.

■

Changing the pre-collision warning timing
The pre-collision warning timing can be changed on the settings
display (

P. 93) of the multi-information display.

The operation timing setting is retained when the engine switch is
turned off.

Far

The warning will begin to oper-
ate earlier than with the default
timing.

Middle

This is the default setting.

Near

The warning will begin to oper-
ate later than with the default
timing.

Changing settings of the pre-collision system

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■

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:
• Vehicle speed is between approximately 7 and 110 mph (10 and 180 km/h).

(For detecting a pedestrian, vehicle speed is between approximately 7 and
50 mph [10 and 80 km/h].)

• The relative speed between your vehicle and the vehicle or pedestrian

ahead is approximately 7 mph (10 km/h) or more.

●

Pre-collision brake assist:
• Vehicle speed is between approximately 20 and 110 mph (30 and 180 km/h).

(For detecting a pedestrian, vehicle speed is between approximately 20 and
50 mph [30 and 80 km/h].)

• The relative speed between your vehicle and the vehicle or pedestrian

ahead is approximately 20 mph (30 km/h) or more.

●

Pre-collision braking:
• Vehicle speed is between approximately 7 and 110 mph (10 and 180

km/h). (For detecting a pedestrian, vehicle speed is between approxi-
mately 7 and 50 mph [10 and 80 km/h].)

• The relative speed between your vehicle and the vehicle or pedestrian

ahead is approximately 7 mph (10 km/h) or more.

The system may not operate in the following situations:

●

If a battery terminal has been disconnected and reconnected and then the
vehicle has not been driven for a certain amount of time

●

If the shift lever is in R

●

If VSC is disabled (only the pre-collision warning function will be opera-
tional)

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■

Pedestrian detection function

■

Cancelation of the pre-collision braking
If either of the following occurs while the pre-collision braking 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 determine that
there is a possibility of a frontal collision and operate.
• When passing a vehicle or pedestrian
• When changing lanes while overtaking a preceding vehicle
• When overtaking a preceding vehicle that is changing lanes

The pre-collision system detects pedestri-
ans based on the size, profile, and motion
of  a  detected  object.  However,  a  pedes-
trian  may  not  be  detected  depending  on
the  surrounding  brightness  and  the
motion,  posture,  and  angle  of  the
detected  object,  preventing  the  system
from operating properly. (

P. 222)

• When overtaking a preceding vehicle

that is making a left/right turn

• When passing a vehicle in an oncom-

ing lane that is stopped to make a
right/left turn

• When driving on a road where relative

location to vehicle ahead in an adja-
cent lane may change, such as on a
winding road

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• When rapidly closing on a vehicle ahead
• If the front of the vehicle is raised or lowered, such as when the road sur-

face is uneven or undulating

• When approaching objects on the roadside, such as guardrails, utility

poles, trees, or walls

• When driving on a narrow path surrounded by a structure, such as in a

tunnel or on an iron bridge

• When there is a metal object (manhole cover, steel plate, etc.), steps, or a

protrusion on the road surface or roadside

• When rapidly closing on an electric toll gate barrier, parking area barrier,

or other barrier that opens and closes

• When using an automatic car wash

• When there is a vehicle, pedestrian,

or object by the roadside at the
entrance of a curve

• When

crossing

pedestrian

approaches very close to the vehicle

• When passing through a place with a

low structure above the road (low ceil-
ing, traffic sign, etc.)

• When passing under an object (bill-

board, etc.) at the top of an uphill road

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• When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When there are patterns or paint on the road or a wall that may be mis-

taken for a vehicle or pedestrian

• When driving near an object that reflects radio waves, such as a large

truck or guardrail

• When driving near a TV tower, broadcasting station, electric power plant,

or other location where strong radio waves or electrical noise may be
present

• When driving through or under

objects that may contact the vehicle,
such as thick grass, tree branches, or
a banner

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■

Situations in which the system may not operate properly

●

In some situations such as the following, a vehicle may not be detected by
the radar sensor and camera sensor, preventing the system from operating
properly:
• If an oncoming vehicle is approaching your vehicle
• If a vehicle ahead is a motorcycle or bicycle
• When approaching the side or front of a vehicle
• If a preceding vehicle has a small rear end, such as an unloaded 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 the sun or other light is shining directly on a vehicle ahead
• If a vehicle cuts in front of your vehicle or emerges from beside a vehicle
• If a vehicle ahead makes an abrupt maneuver (such as sudden swerving,

acceleration or deceleration)

• When suddenly cutting behind a preceding vehicle

• If a preceding vehicle has a low rear

end, such as a low bed trailer

• If a vehicle ahead has extremely high

ground clearance

• When a vehicle ahead is not directly

in front of your vehicle

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• When driving in inclement weather such as heavy rain, fog, snow or a

sandstorm

• When the vehicle is hit by water, snow, dust, etc. from a vehicle ahead
• When driving through steam or smoke
• When driving in a place where the surrounding brightness changes sud-

denly, such as at the entrance or exit of a tunnel

• When a very bright light, such as the sun or the headlights of oncoming

traffic, shines directly into the camera sensor

• When the surrounding area is dim, such as at dawn or dusk, or while at

night or in a tunnel

• After the engine has started the vehicle has not been driven for a certain

amount of time

• While making a left/right turn and for a few seconds after making a left/

right turn

• While driving on a curve and for a few seconds after driving on a curve
• If your vehicle is skidding

• If the wheels are misaligned
• If a wiper blade is blocking the camera sensor
• The vehicle is wobbling.
• The vehicle is being driven at extremely high speeds.
• When driving on a hill
• If the radar sensor or camera sensor is misaligned

●

In some situations such as the following, sufficient braking force 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 slippery sur-

face

• If the front of the vehicle is raised or

lowered

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●

Some pedestrians such as the following may not be detected by the radar
sensor and camera sensor, preventing the system from operating properly:
• Pedestrians shorter than approximately 3.2 ft. (1 m) or taller than approx-

imately 6.5 ft. (2 m)

• Pedestrians wearing oversized clothing (a rain coat, long skirt, etc.), mak-

ing their silhouette obscure

• Pedestrians who are carrying large baggage, holding an umbrella, etc.,

hiding part of their body

• Pedestrians who are bending forward or squatting
• Pedestrians who are pushing a stroller, wheelchair, bicycle or other vehi-

cle

• Groups of pedestrians which are close together
• Pedestrians who are wearing white and look extremely bright
• Pedestrians in the dark, such as at night or while in a tunnel
• Pedestrians whose clothing appears to be nearly the same color or

brightness as their surroundings

• Pedestrians near walls, fences, guardrails, or large objects
• Pedestrians who are on a metal object (manhole cover, steel plate, etc.)

on the road

• Pedestrians who are walking fast
• Pedestrians who are changing speed abruptly
• Pedestrians running out from behind a vehicle or a large object
• Pedestrians who are extremely close to the side of the vehicle (outside

rear view mirror, etc.)

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