Get Driving -> Using the driving support systems-PCS Pre-Collision System Guide for Toyota Corolla 4 Door 2023

190

4-5. Using the driving support systems

be heard and the brake pedal

response may change, but this

does not indicate a malfunction.

PCS (Pre-Collision Sys-

tem)

●When the system is operating, the

brake pedal may feel stiffer than

expected or sink. In either situa-

tion the brake pedal can be

depressed further. Further

depress the brake pedal as nec-

essary.

The pre-collision system

uses sensors to detect

objects (P.191) in the path

of the vehicle. When the

system determines that the

possibility of a frontal colli-

sion with a detectable

object 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 collision

is extremely high, the

brakes are automatically

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 .200)

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191

4-5. Using the driving support systems

*

: Detected as a detectable object

only when being ridden.

WARNING

■For safe use

●Driving safely is solely the

responsibility of the driver. Pay

careful attention to the sur-

rounding conditions in order to

ensure safe driving.

Never use the pre-collision sys-

tem in place of normal braking

operations. This system cannot

help avoid or reduce the impact

of a collision in every situation.

Over-reliance on this system to

drive the vehicle safely may

lead to an accident resulting in

death or serious injury.

System functions

■ Pre-collision warning

When the system determines

that the possibility of a collision

is high, a buzzer will sound and

an icon and warning message

will be displayed on the

multi-information display to urge

the driver to take evasive action.

If the detectable object is a vehi-

cle, moderate braking will be

performed with the warning.

●Although the pre-collision sys-

tem is designed to help avoid or

help reduce the impact of a col-

lision, its effectiveness may

change according to various

conditions. Therefore, it may not

always be able to achieve the

same level of performance.

Read the following items care-

fully. Do not overly rely on this

system and always drive care-

fully.

4

●For safe use: P.184

■When to disable the pre-colli-

If the system determines that

the accelerator pedal is strongly

depressed, the following icon

and message will be displayed

on the multi-information display.

sion system

●When it is necessary to disable

the system: P.184

Detectable objects

The system can detect the fol-

lowing as detectable objects.

(Detectable objects differ

depending on the function.)

 Vehicles

 Bicycles^*

 Pedestrians

 Motorcycles^*

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192

4-5. Using the driving support systems

■ Pre-collision brake assist

If the system determines that

the possibility of a collision is

high and the brake operation by

the driver is insufficient, the

braking power will be increased.

■ Pre-collision brake control

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

impact of the collision.

■ Intersection collision avoid-

ance support (left/right

turn)

In situations such as the follow-

ing, if the system determines

that the possibility of a collision

is high, the pre-collision warning

and pre-collision braking will

operate.

■ Emergency steering assist

If the system determines that

the following conditions are met,

assistance will be provided to

help enhance vehicle stability

and prevent lane departure.

During assistance, in addition to

the pre-collision warning, the fol-

lowing icon will be displayed on

the multi-information display.

Depending on the intersection,

assistance may not operate cor-

rectly.

 When turning left/right at an

intersection and crossing the

path of an oncoming vehicle

 The possibility of a collision is

high

 There is sufficient space

within the lane to perform

evasive steering maneuvers

 The driver is operating the

steering wheel

During assistance, the pre-colli-

sion warning will operate and a

message will be displayed to

warn the driver.

 When turning left/right and an

oncoming pedestrian or bicy-

cle is detected

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193

4-5. Using the driving support systems

acceleration. During operation,

a buzzer will sound and a warn-

ing indicator and message will

be displayed on the multi-infor-

mation display.

■ Intersection collision avoid-

ance support (crossing

vehicles)

At an intersection, etc., if the

system determines that the pos-

sibility of a collision with an

approaching vehicle or motorcy-

cle is high, the pre-collision

warning and pre-collision brak-

ing will operate.

Depending on the intersection,

assistance may not operate cor-

rectly.

WARNING

4

■Pre-collision braking

●When the pre-collision braking

function is operating, a large

amount of braking force will be

applied.

●The pre-collision braking func-

tion is not designed to hold the

vehicle stopped. If the vehicle is

stopped by pre-collision brake

control, the driver should oper-

ate the brakes immediately as

necessary.

●The pre-collision braking func-

tion 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-collision braking function

from operating.

■ Acceleration Suppression

at Low Speed

When driving at a low speed, if

the accelerator pedal is strongly

depressed and the system

determines that there is a possi-

bility of a collision, engine output

will be restrained or the brakes

will be applied weakly to restrict

●If the brake pedal is being

depressed, the system may

determine that the driver is tak-

ing evasive action and possibly

delay the operation timing of the

pre-collision brake control.

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194

4-5. Using the driving support systems

WARNING

■Acceleration Suppression at

Low Speed

If the steering wheel is being

turned, the system may determine

that the driver is taking evasive

action and possibly prevent the

Acceleration Suppression at Low

Speed function from operating.

■Emergency steering assist

●The emergency steering assist

will be canceled when the sys-

tem determines that lane depar-

ture prevention control has

completed.

●Depending on operations per-

formed by the driver, emer-

gency steering assist may not

operate or operation may be

canceled.

• If the accelerator pedal is

depressed strongly, the steering

wheel is turned heavily, the

brake pedal is depressed, or the

turn signal lever is operated, the

system may determine that the

driver is taking evasive action

and the emergency steering

assist may not operate.

• While the emergency steering

assist is operating, if the accel-

erator pedal is depressed

strongly, the steering wheel is

turned heavily, or the brake

pedal is depressed, the system

may determine that the driver is

taking evasive action and emer-

gency steering assist operation

may be canceled.

• While the emergency steering

assist is operating, if the steer-

ing wheel is held or turned in the

opposite direction of system

operation, emergency steering

assist operation will be can-

celed.

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195

4-5. Using the driving support systems

■Operating conditions of each function of the pre-collision system

The pre-collision system is enabled and the system determines that the pos-

sibility of a frontal collision with a detected object is high.

However, the system will not operate in the following situations:

●When the vehicle has not been driven a certain amount after a terminal of

the battery has been disconnected and reconnected

●When the shift lever is in R

●When the VSC OFF indicator is illuminated (only the pre-collision warning

function will be operational)

The following are the operational speeds and cancelation conditions of each

function:

●Pre-collision warning

Relative speed between

Detectable objects

Vehicle speed

your vehicle and object

Approximately 3 to 110 Approximately 3 to 110

mph (5 to 180 km/h) mph (5 to 180 km/h)

Approximately 20 to 110 Approximately 50 to 130

mph (30 to 180 km/h) mph (80 to 220 km/h)

Approximately 3 to 50 Approximately 3 to 50

mph (5 to 80 km/h) mph (5 to 80 km/h)

Approximately 3 to 50 Approximately 3 to 50

mph (5 to 80 km/h) mph (5 to 80 km/h)

Preceding vehicles,

stopped vehicles

4

Oncoming vehicles

Bicycles

Pedestrians

Preceding motorcycles, Approximately 3 to 110 Approximately 3 to 50

stopped motorcycles

mph (5 to 180 km/h)

mph (5 to 80 km/h)

Approximately 20 to 110 Approximately 20 to 110

Oncoming motorcycles

mph (30 to 180 km/h)

While the pre-collision warning is operating, if the steering wheel is operated

heavily or suddenly, the pre-collision warning may be cancelled.

●Pre-collision brake assist

Relative speed between

Detectable objects

Vehicle speed

your vehicle and object

Approximately 20 to 110 Approximately 7 to 110

mph (30 to 180 km/h) mph (10 to 180 km/h)

Approximately 20 to 50 Approximately 20 to 50

mph (30 to 80 km/h) mph (30 to 80 km/h)

Preceding vehicles,

stopped vehicles

Bicycles

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4-5. Using the driving support systems

Relative speed between

your vehicle and object

Detectable objects

Pedestrians

Vehicle speed

Approximately 20 to 50 Approximately 20 to 50

mph (30 to 80 km/h) mph (30 to 80 km/h)

Preceding motorcycles, Approximately 20 to 110 Approximately 7 to 50

stopped motorcycles

mph (30 to 180 km/h)

mph (10 to 80 km/h)

●Pre-collision braking

Relative speed between

your vehicle and object

Detectable objects

Vehicle speed

Preceding vehicles,

stopped vehicles

Approximately 3 to 110 Approximately 3 to 110

mph (5 to 180 km/h) mph (5 to 180 km/h)

Approximately 20 to 110 Approximately 50 to 130

mph (30 to 180 km/h) mph (80 to 220 km/h)

Oncoming vehicles

Bicycles

Approximately 3 to 50 Approximately 3 to 50

mph (5 to 80 km/h) mph (5 to 80 km/h)

Approximately 3 to 50 Approximately 3 to 50

mph (5 to 80 km/h) mph (5 to 80 km/h)

Pedestrians

Preceding motorcycles, Approximately 3 to 110 Approximately 3 to 50

stopped motorcycles

mph (5 to 180 km/h)

mph (5 to 80 km/h)

Approximately 20 to 110 Approximately 20 to 110

Oncoming motorcycles

mph (30 to 180 km/h)

If either of the following occur while the pre-collision braking function is oper-

ating, it will be canceled:

• The accelerator pedal is strongly depressed

• The steering wheel is operated heavily or suddenly

●Emergency steering assist

The emergency steering assist will not operate when the turn signal lights

are flashing.

The emergency steering assist will not operate when the VSC OFF indicator

is illuminated.

Relative speed between

your vehicle and object

Detectable objects

Vehicle speed

Approximately 25 to 50 Approximately 25 to 50

Preceding vehicles,

stopped vehicles, bicy-

cles, pedestrians,

motorcycles

mph (40 to 80 km/h)

Active steering func-

mph (40 to 80 km/h)

Active steering func-

*

tion: to 50 mph ( to 80 tion: to 50 mph ( to 80

km/h) km/h)

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4-5. Using the driving support systems

*

: Minimum vehicle speed: Vehicle speed at which evasion using pre-colli-

sion brake control is difficult

While the emergency steering assist is operating, if any of the following are

performed, emergency steering assist operation may be cancelled:

• The accelerator pedal is strongly depressed

• The steering wheel is operated heavily or suddenly

• The brake pedal is depressed

●Intersection collision avoidance support (left/right turn)

The intersection collision avoidance support (for left/right turning vehicles)

will not operate when the turn signal lights are not flashing.

Relative speed

between your

vehicle and object

Detectable

objects

Oncomingvehicle

speed

Vehicle speed

Approximately 3 Approximately 3 Approximately 7

Oncoming vehi-

cles

to 25 mph (5 to

40 km/h)

to 45 mph (5 to

75 km/h)

to 70 mph (10 to

115 km/h)

4

Approximately 3

to 20 mph (5 to

30 km/h)

Approximately 3

to 25 mph (5 to

40 km/h)

Pedestrians

Bicycles



Approximately 3

to 20 mph (5 to

30 km/h)

Approximately 3

to 30 mph (5 to

50 km/h)

Approximately 3 Approximately 3 Approximately 7

Oncoming motor-

cycles

to 25 mph (5 to

40 km/h)

to 45 mph (5 to

75 km/h)

to 70 mph (10 to

115 km/h)

●Intersection collision avoidance support (crossing vehicles)

Relative speed

between your

vehicle and object

Detectable

objects

Crossing vehicle

speed

Vehicle speed

• Your vehicle

speed or less

• Approximately to 38 mph (5 to

Approximately 3

to 38 mph (5 to

60 km/h)

Approximately 3

Vehicles (side)

25 mph (40

60 km/h)

km/h) or less

• Your vehicle

speed or less

• Approximately to 38 mph (5 to

Approximately 3

to 38 mph (5 to

60 km/h)

Approximately 3

Motorcycles

(side)

25 mph (40

60 km/h)

km/h) or less

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4-5. Using the driving support systems

●Acceleration Suppression at Low Speed

The Acceleration Suppression at Low Speed function will not operate when

the turn signal lights are flashing.

Relative speed between

your vehicle and object

Detectable objects

Vehicle speed

Preceding vehicles,

stopped vehicles

Approximately 0 to 9

mph (0 to 15 km/h)

Approximately 0 to 9

mph (0 to 15 km/h)

Approximately 0 to 9

mph (0 to 15 km/h)

Approximately 0 to 9

mph (0 to 15 km/h)

Pedestrians

Bicycles

Approximately 0 to 9

mph (0 to 15 km/h)

Approximately 0 to 9

mph (0 to 15 km/h)

While the Acceleration Suppression at Low Speed function is operating, if

any of the following are performed, the low speed sudden acceleration sup-

pression function operation will be cancelled:

• The accelerator pedal is released.

• The steering wheel is operated heavily or suddenly

■Detection of detectable objects

• When suddenly approaching a

detectable object

• When approaching a detectable

object or other object on the road-

side, such as guardrails, utility

poles, trees, walls, etc.

• When there is a detectable object

or other object by the roadside at

the entrance of a curve

Objects are detected based on their

size, shape, and movement.

Depending on the ambient bright-

ness, movement, posture and direc-

tion of a detectable object, it may

not be detected and the system may

not operate properly.

The system detects shapes, such as

the following, as detectable objects.

• When there are patterns or a

painting ahead of the vehicle that

may be mistaken for a detectable

object

• When passing a detectable object

that is changing lanes or turning

left/right

■Situations in which the system

may operate even though the

possibility of a collision is not

high

●In certain situations, such as the

following, the system may deter-

mine that the possibility of a colli-

sion is high and operate:

• When passing a detectable object

• When changing lanes while over-

taking a detectable object

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4-5. Using the driving support systems

• When passing a detectable object

which is stopped to make a

left/right turn

• When the steering wheel is oper-

ated toward the path of an oncom-

ing vehicle

■Situations in which the system

may not operate properly

●In certain situations, such as the

following, a detectable object may

not be detected by the front sen-

sors, and the system may not

operate properly:

• When a detectable object is

approaching your vehicle

4

• When a detectable object stops

immediately before entering the

path of the vehicle

• When passing through a location

with a structure above the road

(traffic sign, billboard, etc.)

• When your vehicle or a detectable

object is wandering

• When a detectable object makes

an abrupt maneuver (such as sud-

den swerving, acceleration or

deceleration)

• When suddenly approaching a

detectable object

• When the detectable object is

near a wall, fence, guardrail, man-

hole cover, steel plate on the road

surface, or another vehicle

• When there is a structure above a

detectable object

• When part of a detectable object

is hidden by another object (large

luggage, umbrella, guardrail, etc.)

• When multiple detectable objects

are overlapping

• When a bright light, such as the

sun, is reflecting off of a detect-

able object

• When approaching an electric toll

gate barrier, parking lot barrier, or

other barrier that opens and

closes

• When turning left/right and an

oncoming vehicle or pedestrian

crosses in front of the vehicle

• When attempting to turn left/right

in front of an oncoming vehicle or

pedestrian

• When turning left/right and an

oncoming vehicle or pedestrian

stops immediately before entering

the path of the vehicle

• When turning left/right and an

oncoming vehicle turns left/right in

front of the vehicle

• When a detectable object is white

and looks extremely bright

• When the color or brightness of a

detectable object causes it to

blend in with its surroundings

• When a detectable object cuts in

front of or suddenly emerges in

front of your vehicle

• When approaching a vehicle

which is diagonal

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4-5. Using the driving support systems

• If a vehicle ahead is a child sized

bicycle, is carrying a large load, is

carrying an extra passenger, or

has an unusual shape (bicycles

equipped with a child seat, tan-

dem bicycles, etc.)

tion as the vehicle and continues

straight

• If a pedestrian or bicycle is shorter

than approximately 3.2 ft. (1 m) or

taller than approximately 6.5 ft. (2

m).

• When the silhouette of a pedes-

trian or bicycle is unclear (such as

when they are wearing a raincoat,

long skirt, etc.)

• When a pedestrian or bicycle is

bending forward or squatting

• When a pedestrian or bicycle is

moving at high speed

●In addition to the preceding, in

certain situations, such as the fol-

lowing, the emergency steering

assist may not operate properly:

• When a detectable object is too

close to the vehicle

• When there is insufficient space to

perform evasive steering maneu-

vers or an obstruction exists in the

evasion direction

• When there is an oncoming vehi-

cle

• When a pedestrian is pushing a

stroller, wheelchair, bicycle or

other vehicle

• When a detectable object blends

in with the surrounding area, such

as when it is dim (at dawn or dusk)

or dark (at night or in a tunnel)

• When the vehicle has not been

driven for a certain amount of time

after the engine was started

• While turning left/right or a few

seconds after turning left/right

• While driving around a curve and

a few seconds after driving around

a curve

Changing the pre-colli-

sion setting

 The pre-collision system can

be enabled/disabled through

a customize setting. (P.412)

• When turning left/right and an

oncoming vehicle is driving in a

lane 3 or more lanes from the

vehicle

• When turning left/right and the

direction of the vehicle differs

greatly from the direction traffic

flows in the oncoming lane

The system is enabled each time

the engine switch is turned to ON.

 When the system is disabled,

the PCS warning light will illu-

minate and a message will be

displayed on the multi-infor-

mation display.

• When turning left/right and

approaching a pedestrian which

was traveling in the same direc-

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