Toyota Highlander (2018 year). Manual - part 65

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4-5. Using the driving support systems

• 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 prop-
erly

*

2

:

• 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.)

*

2

: For countries/areas specified as Region B (

→

P. 261), the pedestrian

detection function may not be available.

■

If the PCS warning light flashes or illuminates and a warning message is
displayed on the multi-information display
The pre-collision 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 a front sensor 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. 437, 444)

• 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

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4-5. Using the driving support systems

●

If the PCS warning light continues to flash or remains illuminated or the
warning message does not disappear even though the vehicle has returned
to normal, the system may be malfunctioning. 
Have the vehicle inspected by your Toyota dealer immediately.

■

If VSC is disabled

●

If VSC is disabled (

→P. 334), 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-Collision Brake
System Unavailable” will be displayed on the multi-information display.

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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 windshield.

◆

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.

LDA (Lane Departure Alert with steering 

control)

Summary of functions

Functions included in LDA system