Toyota Prius Plug-in Hybrid (2017 year). Instruction

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5-5. Using the driving support systems

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 time

●If the shift position is in R

● If VSC is disabled (only the pre-crash warning function will be operational)

●If the PCS warning light is flashing or illuminated

 Region B

(The pedestrian detection function is not available and the pre-crash brak-

ing function is available)

The pre-crash safety system is enabled and the system determines that the

possibility of a frontal collision with a vehicle is high.

Each function is operational at the following speeds:

● Pre-crash warning:

• Vehicle speed is between approximately 15 and 180 km/h (10 and

110 mph).

• The relative speed between your vehicle and the vehicle ahead is

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

● Pre-crash brake assist:

• Vehicle speed is between approximately 30 and 180 km/h (19 and

110 mph).

• The relative speed between your vehicle and the vehicle ahead is

approximately 30 km/h (19 mph) or more.

● Pre-crash braking:

• Vehicle speed is between approximately 15 and 180 km/h (10 and

110 mph).

• The relative speed between your vehicle and the vehicle ahead is

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

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 time

●If the shift position is in R

● If VSC is disabled (only the pre-crash warning function will be operational)

●If the PCS warning light is flashing or illuminated

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 Region C

(The pedestrian detection function and pre-crash braking function are not

available)

The pre-crash safety system is enabled and the system determines that the

possibility of a frontal collision with a vehicle is high.

Each function is operational at the following speeds:

● Pre-crash warning:

• Vehicle speed is between approximately 15 and 180 km/h (10 and 110

mph).

• The relative speed between your vehicle and the vehicle ahead is

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

● Pre-crash brake assist:

• Vehicle speed is between approximately 30 and 180 km/h (19 and 110

mph).

• The relative speed between your vehicle and the vehicle ahead is

approximately 30 km/h (19 mph) or more.

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 time

● If the shift lever is in R

● If VSC is disabled (only the pre-crash warning function will be operational)

●If the PCS warning light is flashing or illuminated

■ Pedestrian detection function*4

The pre-crash safety system detects

pedestrians based on the size, profile,

and motion of a detected object. However,

a pedestrian 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. 380)

*4: Depending on the region in which the vehicle was sold, the pedestrian

detection function may not be available.

■ Cancelation of the pre-crash braking*3

If either of the following occur while the pre-crash braking function is operat-

ing, it will be canceled:

● The accelerator pedal is depressed strongly.

● The steering wheel is turned sharply or abruptly.

*3: Depending on the region in which the vehicle was sold, the pre-crash brak-

ing function may not be available.

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■ 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*4

• When changing lanes while overtaking a preceding vehicle

• When overtaking a preceding vehicle that is changing lanes

• 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

• 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 there is a vehicle, pedes-

trian*4, or object by the roadside at

the entrance of a curve

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• 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 a crossing pedestrian

approaches very close to the vehi-

cle*4

• 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

• 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 driving through or under

objects that may contact the vehicle,

such as thick grass, tree branches, or

a banner

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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*4

• 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

*4: Depending on the region in which the vehicle was sold, the pedestrian

detection function may not be available.

■ 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 preceding vehicle has a low rear

end, such as a low bed trailer

• If a vehicle ahead is carrying a load which protrudes past its rear bumper

• If a vehicle ahead has extremely high

ground clearance

• 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

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• If a vehicle ahead makes an abrupt maneuver (such as sudden swerving,

acceleration or deceleration)

• When suddenly cutting behind a preceding vehicle

• When a vehicle ahead is not directly

in front of your vehicle

• 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 hybrid system 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 front of the vehicle is raised or

lowered

• 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

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5-5. Using the driving support systems

●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

● Some pedestrians such as the following may not be detected by the radar

sensor and camera sensor, preventing the system from operating prop-

erly*4:

• Pedestrians shorter than approximately 1 m (3.2 ft.) or taller than approx-

imately 2 m (6.5 ft.)

• 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.)

*4: Depending on the region in which the vehicle was sold, the pedestrian

detection function may not be available.

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381

■ If the PCS warning light flashes and a warning message is displayed on

the multi-information display

The pre-crash safety system may be temporarily unavailable or there may be

a malfunction in the system.

●In the following situations, the warning light will turn off, the message will

disappear and the system will become operational when normal operating

conditions return:

• When the radar sensor or camera sensor or the area around either sen-

sor is hot, such as in the sun

• When the radar sensor or camera sensor or the area around either sen-

sor is cold, such as in an extremely cold environment

• When the radar sensor or front grille emblem is dirty or covered with

snow, etc.

• When the part of the windshield in front of the camera sensor is fogged

up or covered with condensation or ice

(Defogging the windshield: P. 509)

• If the camera sensor is obstructed, such as when the hood is open or a

sticker is attached to the windshield near the camera sensor

● If the PCS warning light continues to flash or the warning message does not

disappear, the system may be malfunctioning. Have the vehicle inspected

by any authorized Toyota dealer or repairer, or another duly qualified and

equipped professional immediately.

■ If VSC is disabled

●If VSC is disabled (P. 493), the pre-crash brake assist and pre-crash brak-

ing functions are also disabled.

●The PCS warning light will turn on and “VSC Turned Off Pre-crash Brake

System Unavailable” will be displayed on the multi-information display.

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5-5. Using the driving support systems

LDA (Lane Departure Alert with steering

control)

Summary of functions

When driving on highways and freeways with white (yellow) lines, this

function alerts the driver when the vehicle might depart from its lane

and provides assistance by operating the steering wheel to keep the

vehicle in its lane.

The LDA system recognizes visi-

ble white (yellow) lines with the

camera sensor on the upper por-

tion of the front windshield.

Functions included in LDA system

◆ Lane departure alert function

When the system determines

that the vehicle might depart

from its lane, a warning is dis-

played on the multi-information

display and the warning buzzer

sounds to alert the driver.

When the warning buzzer

sounds, check the surrounding

road situation and carefully

operate the steering wheel to

move the vehicle back to the

center of the lane.

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◆ Steering control function

When the system determines

that the vehicle might depart

from its lane, the system pro-

vides assistance as necessary

by operating the steering wheel

in small amounts for a short

period of time to keep the vehi-

cle in its lane.

If the system detects that the

steering wheel has not been

operated for a fixed amount of

time or the steering wheel is not

being firmly gripped, a warning

is displayed on the multi-infor-

mation display and the function

is temporarily canceled.

◆ Vehicle sway warning

When the vehicle is swaying or

appears as if it may depart from

its lane multiple times, the

warning buzzer sounds and a

message is displayed on the

multi-information display to alert

the driver.

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5-5. Using the driving support systems

WARNING

■ Before using LDA system

Do not rely solely upon the LDA system. The LDA system does not auto-

matically drive the vehicle or reduce the amount of attention that must be

paid to the area in front of the vehicle. The driver must always assume full

responsibility for driving safely by paying careful attention to the surround-

ing conditions and operating the steering wheel to correct the path of the

vehicle. Also, the driver must take adequate breaks when fatigued, such as

from driving for a long period of time.

Failure to perform appropriate driving operations and pay careful attention

may lead to an accident, resulting in death or serious injury.

■ To avoid operating LDA system by mistake

When not using the LDA system, use the LDA switch to turn the system off.

■ Situations unsuitable for LDA system

Do not use the LDA system in the following situations.

The system may not operate properly and lead to an accident, resulting in

death or serious injury.

● Tire chains are equipped.

● When the tires have been excessively worn, or when the tire inflation pres-

sure is low.

● Tires which differ by structure, manufacturer, brand or tread pattern are

used.

●Objects or patterns that could be mistaken for white (yellow) lines are

present on the side of the road (guardrails, curbs, reflective poles etc.).

● Vehicle is driven on a snow-covered road.

●White (yellow) lines are difficult to see due to rain, snow, fog, dust, etc.

● Asphalt repair marks, white (yellow) line marks, etc., are present due to

road repair.

● Vehicle is driven in a temporary lane or restricted lane due to construction

work.

● Vehicle is driven on a road surface which is slippery due to rainy weather,

fallen snow, freezing, etc.

● Vehicle is driven in traffic lanes other than on highways and freeways.

● Vehicle is driven in a construction zone.

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WARNING

■ Preventing LDA system malfunctions and operations performed by

mistake

●Do not modify the headlights or place stickers, etc., on the surface of the

lights.

●Do not modify the suspension etc. If the suspension etc. needs to be

replaced, contact any authorized Toyota dealer or repairer, or another duly

qualified and equipped professional.

●Do not install or place anything on the hood or grille. Also, do not install a

grille guard (bull bars, kangaroo bar, etc.).

● If your windshield needs repairs, contact any authorized Toyota dealer or

repairer, or another duly qualified and equipped professional.

Turning LDA system on

Press the LDA switch to turn the

LDA system on.

The LDA indicator illuminates and

a message is displayed on the

multi-information display.

Press the LDA switch again to turn

the LDA system off.

When the LDA system is turned on

or off, operation of the LDA system

continues in the same condition

the next time the hybrid system is

started.

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5-5. Using the driving support systems

Indications on combination meter

LDA indicator

Illuminates when the LDA sys-

tem is on.

Steering control indicator and

operation display of steering

wheel operation support

When that steering wheel

assistance of the steering con-

trol function is operating, the

indicator illuminates and the

operation display on the multi-

information display is turned on.

Lane departure alert function display

Displayed when the multi-information display is switched to the

screen. (P. 241)

 Inside of displayed white lines

is white

is black

Indicates that the system is recog-

Indicates that the system is not

nizing white (yellow) lines. When

able to recognize white (yellow)

the vehicle departs from its lane,

lines or is temporarily canceled.

the white line displayed on the

side the vehicle departs from

flashes orange.

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■ Operation conditions of each function

● Lane departure alert function

This function operates when all of the following conditions are met.

• LDA is turned on.

• Vehicle speed is approximately 50 km/h (32 mph) or more.

• System recognizes white (yellow) lines.

• Width of traffic lane is approximately 3 m (9.8 ft.) or more.

• Turn signal lever is not operated.

• Vehicle is driven on a straight road or around a gentle curve with a radius

of more than approximately 150 m (492 ft.).

• No system malfunctions are detected. (P. 390)

●Steering control function

This function operates when all of the following conditions are met in addi-

tion to the operation conditions for the lane departure alert function.

• Setting for “

(LDA Steering Assist Mode)” in the

screen of

the multi-information display is set to “On”. (P. 242)

• Vehicle is not accelerated or decelerated by a fixed amount or more.

• Steering wheel is not operated with a steering force level suitable for

changing lanes.

• ABS, VSC, TRC and PCS are not operating.

• TRC or VSC is not turned off.

• Hands off steering wheel alert is not displayed. (P. 388)

● Vehicle sway warning

This function operates when all of the following conditions are met.

• Setting for “

(Lane Sway Warning Status)” in the

screen of

the multi-information display is set to “On”. (P. 242)

• Vehicle speed is approximately 50 km/h (32 mph) or more.

• Width of traffic lane is approximately 3 m (9.8 ft.) or more.

• No system malfunctions are detected. (P. 390)

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■ Temporary cancelation of functions

● When operation conditions are no longer met, a function may be temporarily

canceled. However, when the operation conditions are met again, operation

of the function is automatically restored. (P. 387)

● When operation conditions are no longer met while operating the steering

control function, a buzzer may sound to indicate that a function may be tem-

porarily canceled. (P. 387)

■Steering control function

Depending on the vehicle speed, lane departure situation, road conditions,

etc., the driver may not feel the function is operating or the function may not

operate at all.

■ Lane departure alert function

The warning buzzer may be difficult to hear due to external noise, audio play-

back, etc.

■ Hands off steering wheel alert

When the system determines that the driver has removed the hands from the

steering wheel while the steering control function is operating, a warning

message is displayed on the multi-information display.

If the driver continues to keep the hands off of the steering wheel, the buzzer

sounds, a warning message is displayed and the function is temporarily can-

celed. This alert also operates in the same way when the vehicle is driven

with the steering wheel lightly gripped. However, depending on the road con-

ditions, etc., the function may not cancel.

■ White (yellow) lines are only on one side of road

The LDA system will not operate for the side on which white (yellow) lines

could not be recognized.

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■ Conditions in which functions may not operate properly

In the following situations, the camera sensor may not detect white (yellow)

lines and various functions may not operate normally.

● There are shadows on the road that run parallel with, or cover, the white

(yellow) lines.

● The vehicle is driven in an area without white (yellow) lines, such as in front

of a tollgate or checkpoint, or at an intersection, etc.

● The white (yellow) lines are cracked, “Raised pavement marker” or stones

are present.

● The white (yellow) lines cannot be seen or are difficult to see due to sand,

etc.

● The vehicle is driven on a road surface that is wet due to rain, puddles, etc.

● The traffic lines are yellow (which may be more difficult to recognize than

lines that are white).

● The white (yellow) lines cross over a curb, etc.

● The vehicle is driven on a bright surface, such as concrete.

● The vehicle is driven on a surface that is bright due to reflected light, etc.

●The vehicle is driven in an area where the brightness changes suddenly,

such as at the entrances and exits of tunnels, etc.

● Light from the headlights of an oncoming vehicle, the sun, etc., enters the

camera.

● The vehicle is driven where the road diverges, merges, etc.

● The vehicle is driven on a slope.

● The vehicle is driven on a road which tilts left or right, or a winding road.

● The vehicle is driven on an unpaved or rough road.

● The vehicle is driven around a sharp curve.

● The traffic lane is excessively narrow or wide.

● The vehicle is extremely tilted due to carrying heavy luggage or having

improper tire pressure.

●The distance to the preceding vehicle is extremely short.

● The vehicle is moving up and down a large amount due to road conditions

during driving (poor roads or road seams).

●The headlight lenses are dirty and emit a faint amount of light at night, or the

beam axis has deviated.

● The vehicle is struck by a crosswind.

● The vehicle has just changed lanes or crossed an intersection.

● Snow tires, etc., are equipped.

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■ Warning message

If the following warning message is displayed on the multi-information dis-

play, follow the appropriate troubleshooting procedure.

Warning message

Details/Actions

The system may not be operating

properly.

“Lane Departure Alert

 Have the vehicle inspected at any

Malfunction

authorized Toyota dealer or

Visit Your Dealer”

repairer, or another duly qualified

and equipped professional.

Dirt, rain, condensation, ice, snow,

etc. are present on the windshield in

“Forward Camera

front of the camera sensor.

System

 Turn the LDA system off, remove

Unavailable

any dirt, rain, condensation, ice,

Clean Windshield”

snow, etc. from the windshield, and

then turn the LDA system back on.

The operation conditions of the cam-

era sensor (temperature, etc.) are not

met.

 When the operation conditions of

“Forward Camera

the camera sensor

(temperature,

System

etc.) are met, the LDA system will

Unavailable”

become available. Turn the LDA

system off, wait for a little while,

and then turn the LDA system back

on.

The LDA system is temporarily can-

celed due to a malfunction in a sensor

other than the camera sensor.

 Turn the LDA system off and follow

“Lane Departure Alert

the appropriate troubleshooting

Unavailable”

procedures for the warning mes-

sage. Afterward, drive the vehicle

for a short time, and then turn the

LDA system back on.

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Toyota Prius Plug-in Hybrid (2017 year). Instruction - part 23