Toyota Sienna Hybrid (2023 year). Manual in english - page 17

272

4-5. Using the driving support systems

■

Enabling/disabling the pre-
collision system

The pre-collision system can be 
enabled/disabled on 

 

(



P.112) of the multi-informa-

tion display.

The system is automatically 
enabled each time the power 
switch is turned to ON.

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

■

Changing the pre-collision 
warning timing

The pre-collision warning timing 
can be changed on 

 

(



P.112) of the multi-informa-

tion display.

The warning timing setting is 
retained when the power switch is 
turned to OFF. However, if the pre-
collision system is disabled and re-
enabled, the operation timing will 
return to the default setting (mid-
dle).

WARNING

●

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 

chassis dynamometer or speed-

ometer tester, or when using an 

on vehicle wheel balancer

●

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 vehicle has been in an acci-

dent 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 sen-

sor or front camera is temporar-

ily installed to the vehicle

Changing settings of the 
pre-collision system

273

4-5. Using the driving support systems

4

Dr

iv

ing

1

Early

2

Middle

This is the default setting.

3

Late

■

Operational conditions

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

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

Each function is operational at the following speed

●

Pre-collision warning

●

Pre-collision brake assist

Detectable objects

Vehicle speed

Relative speed between 

your vehicle and object

Vehicles

Approx. 7 to 110 mph 

(10 to 180 km/h)

Approx. 7 to 110 mph 

(10 to 180 km/h)

Bicyclists and pedestri-

ans

Approx. 7 to 50 mph (10 

to 80 km/h)

Approx. 7 to 50 mph (10 

to 80 km/h)

Detectable objects

Vehicle speed

Relative speed between 

your vehicle and object

Vehicles

Approx. 20 to 110 mph 

(30 to 180 km/h)

Approx. 20 to 110 mph 

(30 to 180 km/h)

Bicyclists and pedestri-

ans

Approx. 20 to 50 mph 

(30 to 80 km/h)

Approx. 20 to 50 mph 

(30 to 80 km/h)

274

4-5. Using the driving support systems

●

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 time

●

If the shift lever is in R

●

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

function will be operational)

■

Object detection function

The system detects objects based 

on their size, profile, motion, etc. 

However, an object may not be 

detected depending on the sur-

rounding brightness and the motion, 

posture, and angle of the detected 

object, preventing the system from 

operating properly. (



P.275) 

The illustration shows an image of 

detectable objects.

■

Cancelation of the pre-collision 

braking

If either of the following occur while 

the pre-collision braking function is 

operating, 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 possibility of a colli-

sion

●

In some situations such as the fol-

lowing, the system may determine 

that there is a possibility of a fron-

tal collision and operate.

• When passing a detectable 

object, etc.

• When changing lanes while over-

taking a detectable object, etc.

• When approaching a detectable 

object in an adjacent lane or on 

the roadside, such as when 

changing the course of travel or 

driving on a winding road

• When rapidly closing on a detect-

able object, etc.

• When approaching objects on the 

roadside, such as detectable 

objects, guardrails, utility poles, 

trees, or walls

• When there is a detectable object 

or other object by the roadside at 

Detectable objects

Vehicle speed

Relative speed between 

your vehicle and object

Vehicles

Approx. 7 to 110 mph 

(10 to 180 km/h)

Approx. 7 to 110 mph 

(10 to 180 km/h)

Bicyclists and pedestri-

ans

Approx. 7 to 50 mph (10 

to 80 km/h)

Approx. 7 to 50 mph (10 

to 80 km/h)

275

4-5. Using the driving support systems

4

Dr

iv

ing

the entrance of a curve

• When there are patterns or paint 

in front of your vehicle that may be 

mistaken for a detectable object

• When the front of your vehicle is 

hit by water, snow, dust, etc.

• 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 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 when on an 

uneven or undulating road surface

• When driving on a road sur-

rounded 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 in front of 

your vehicle

• When passing under an object 

(road sign, billboard, etc.)

• When approaching 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 your 

vehicle, such as thick grass, tree 

branches, or a banner

• When driving through steam or 

smoke

• 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 elec-

trical noise may be present

■

Situations in which the system 

may not operate properly

●

In some situations such as the fol-

lowing, an object may not be 

detected by the radar sensor and 

front camera, preventing the sys-

tem from operating properly:

• When a detectable object is 

approaching your vehicle

• When your vehicle or a detectable 

object is wobbling

276

4-5. Using the driving support systems

• If a detectable object makes an 

abrupt maneuver (such as sudden 

swerving, acceleration or deceler-

ation)

• When your vehicle approaches a 

detectable object rapidly

• When a detectable object is not 

directly in front of your vehicle

• 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 a detectable object appears 

to be nearly the same color or 

brightness as its surroundings

• If a detectable object cuts or sud-

denly emerges in front of your 

vehicle

• When the front of your vehicle is 

hit by water, snow, dust, etc.

• When a very bright light ahead, 

such as the sun or the headlights 

of oncoming traffic, shines directly 

into the front camera

• When approaching the side or 

front of a vehicle ahead

• If a vehicle ahead is a motorcycle

• If a vehicle ahead is narrow, such 

as a personal mobility 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 has extremely 

high ground clearance

• 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 vehicle ahead is a child sized 

bicycle, a bicycle that is carrying a 

large load, a bicycle ridden by 

more than one person, or a 

uniquely shaped bicycle (bicycle 

with a child seat, tandem bicycle, 

etc.)

• If a pedestrian/or the riding height 

of a bicyclist ahead is shorter than 

approximately 3.2 ft. (1 m) or taller 

than approximately 6.5 ft. (2 m)

• If a pedestrian/bicyclist is wearing 

oversized clothing (a rain coat, 

long skirt, etc.), making their sil-

houette obscure

• If a pedestrian is bending forward 

or squatting or bicyclist is bending 

forward

• If a pedestrian/bicyclist is moving 

fast

• If a pedestrian is pushing a 

stroller, wheelchair, bicycle or 

other vehicle

• When driving in inclement weather 

277

4-5. Using the driving support systems

4

Dr

iv

ing

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 

nearly the same color as its sur-

roundings

• When driving in a place where the 

surrounding brightness changes 

suddenly, such as at the entrance 

or exit of 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 

front camera

• The vehicle is being driven at 

extremely high speeds

• When driving on a hill

• If the radar sensor or front camera 

is misaligned

●

In some situations such as the fol-

lowing, sufficient braking force 

may not be obtained, preventing 

the system from performing prop-

erly:

• 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 main-

tained (brakes or tires are exces-

sively worn, improper tire inflation 

pressure, etc.)

• When the vehicle is being driven 

on a gravel road or other slippery 

surface

■

If VSC is disabled

●

If VSC is disabled (



P.337), 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-Colli-

sion Brake System Unavailable” 

will be displayed on the multi-

information display.

278

4-5. Using the driving support systems

LTA (Lane Tracing 

Assist)

While driving on a road with 
clear white (yellow) lane 
lines, the LTA system warns 
the driver if the vehicle may 
deviate from the current 
lane or course

*

, and also 

can slightly operate the 
steering wheel to help avoid 
deviation from the lane or 
course

*

. Also, while the 

dynamic radar cruise con-
trol with full-speed range 
P.291 is operating, this sys-
tem will operate the steering 
wheel to maintain the vehi-
cle’s lane position.

The LTA system recognizes 
white (yellow) lane lines or a 
course

*

 using the front cam-

era. Additionally, it detects 
preceding vehicles using 
the front camera and radar.

*

: Boundary between asphalt and 

the side of the road, such as 
grass, soil, or a curb

WARNING

■

Before using LTA system

●

Do not rely solely upon the LTA 

system. The LTA system does 

not automatically drive the vehi-

cle 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 atten-

tion to the surrounding condi-

tions 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 care-

ful attention may lead to an 

accident, resulting in death or 

serious injury.

●

When not using the LTA sys-

tem, use the LTA switch to turn 

the system off.

■

Situations unsuitable for LTA 

system

In the following situations, use the 

LTA switch to turn the system off. 

Failure to do so may lead to an 

accident, resulting in death or 

serious injury.

●

Vehicle is driven on a road sur-

face which is slippery due to 

rainy weather, fallen snow, 

freezing, etc.

●

Vehicle is driven on a snow-cov-

ered road.

●

White (yellow) lines are difficult 

to see due to rain, snow, fog, 

dust, etc.

●

Vehicle is driven in a temporary 

lane or restricted lane due to 

construction work.

279

4-5. Using the driving support systems

4

Dr

iv

ing

WARNING

●

Vehicle is driven in a construc-

tion zone.

●

A spare tire, tire chains, etc. are 

equipped.

●

When the tires have been 

excessively worn, or when the 

tire inflation pressure is low.

●

When your vehicle is towing a 

trailer or during emergency tow-

ing

■

Preventing LTA system mal-

functions and operations per-

formed by mistake

●

Do not modify the headlights or 

place stickers, etc. on the sur-

face of the lights.

●

Do not modify the suspension 

etc. If the suspension etc. needs 

to be replaced, contact your 

Toyota dealer.

●

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 your Toyota 

dealer.

■

Conditions in which functions 

may not operate properly

In the following situations, the 

functions may not operate prop-

erly and the vehicle may depart 

from its lane. Drive safely by 

always paying careful attention to 

your surroundings and operate 

the steering wheel to correct the 

path of the vehicle without relying 

solely on the functions.

●

When the follow-up cruising dis-

play is displayed (



P.284) and 

the preceding vehicle changes 

lanes. (Your vehicle may follow 

the preceding vehicle and also 

change lanes.)

●

When the follow-up cruising dis-

play is displayed (



P.284) and 

the preceding vehicle is sway-

ing. (Your vehicle may sway 

accordingly and depart from the 

lane.)

●

When the follow-up cruising dis-

play is displayed (



P.284) and 

the preceding vehicle departs 

from its lane. (Your vehicle may 

follow the preceding vehicle and 

depart from the lane.)

●

When the follow-up cruising dis-

play is displayed (



P.284) and 

the preceding vehicle is being 

driven extremely close to the 

left/right lane line. (Your vehicle 

may follow the preceding vehi-

cle and depart from the lane.)

●

Vehicle is being driven around a 

sharp curve.

280

4-5. Using the driving support systems

WARNING

●

Objects or patterns that could 

be mistaken for white (yellow) 

lines are present on the side of 

the road (guardrails, reflective 

poles, etc.).

●

Vehicle is driven where the road 

diverges, merges, etc.

●

Repair marks of asphalt, white 

(yellow) lines, etc. are present 

due to road repair.

●

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 intersec-

tion, etc.

●

The white (yellow) lines are 

cracked, “Botts’ dots”, “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.

●

If the edge of the road is not 

clear or straight.

●

The vehicle is driven on a sur-

face 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 on a slope.

●

The vehicle is driven on a road 

which tilts left or right, or a wind-

ing road.

●

The vehicle is driven on an 

unpaved or rough road.

281

4-5. Using the driving support systems

4

Dr

iv

ing

■

Lane departure alert func-
tion

When the system determines 

that the vehicle might depart 
from its lane or course

*

, a warn-

ing is displayed on the multi-
information display, and either a 
warning buzzer will sound or the 
steering wheel will vibrate to 
alert the driver.

When the warning buzzer sounds 
or the steering wheel vibrates, 
check the area around your vehicle 
and carefully operate the steering 
wheel to move the vehicle back to 
the center of the lane.
Vehicle with BSM: When the sys-
tem determines that the vehicle 
might depart from its lane and that 
the possibility of a collision with an 
overtaking vehicle in the adjacent 
lane is high, the lane departure 
alert will operate even if the turn 
signals are operating.

*

: Boundary between asphalt and 

the side of the road, such as 
grass, soil, or a curb

WARNING

●

The traffic lane is excessively 

narrow or wide.

●

The vehicle is extremely tilted 

due to carrying heavy luggage 

or having improper tire pres-

sure.

●

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).

●

When driving in a tunnel or at 

night with the headlights off or 

when a headlight is dim due to 

its lens being dirty or it being 

misaligned.

●

The vehicle is struck by a cross-

wind.

●

The vehicle is affected by wind 

from a vehicle driven in a 

nearby lane.

●

The vehicle has just changed 

lanes or crossed an intersec-

tion.

●

Tires which differ by structure, 

manufacturer, brand or tread 

pattern are used.

●

When tires of a size other than 

specified are installed.

●

Snow tires, etc. are equipped.

●

The vehicle is being driven at 

extremely high speeds.

Functions included in 
LTA system

282

4-5. Using the driving support systems

■

Steering assist function

When the system determines 
that the vehicle might depart 
from its lane or course

*

, the sys-

tem provides assistance as nec-
essary by operating the steering 
wheel in small amounts for a 
short period of time to keep the 
vehicle in its lane.

If the system detects that the steer-
ing 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-information display and 
the function is temporarily can-
celed.
Vehicle with BSM: When the sys-
tem determines that the vehicle 
might depart from its lane and that 
the possibility of a collision with an 
overtaking vehicle in the adjacent 
lane is high, the steering assist 
function will operate even if the turn 
signals are operating.

*

: Boundary between asphalt and 

the side of the road, such as 
grass, soil, or a curb

■

Vehicle sway warning func-
tion

When the vehicle is swaying 
within a lane, the warning 
buzzer will sound and a mes-
sage will be displayed on the 
multi-information display to alert 
the driver.

283

4-5. Using the driving support systems

4

Dr

iv

ing

■

Lane centering function

This function is linked with 
dynamic radar cruise control 
with full-speed range and pro-
vides the required assistance by 
operating the steering wheel to 
keep the vehicle in its current 
lane.

When dynamic radar cruise control 
with full-speed range is not operat-
ing, the lane centering function 
does not operate.
In situations where the white (yel-
low) lane lines are difficult to see or 
are not visible, such as when in a 
traffic jam, this function will operate 
to help follow a preceding vehicle 
by monitoring the position of the 
preceding vehicle.
If the system detects that the steer-
ing 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-information display and 
the function is temporarily can-
celed.

Press the LTA switch to turn the 
LTA system on.

The LTA indicator illuminates and a 
message is displayed on the multi-
information display.

Press the LTA switch again to 
turn the LTA system off.

When the LTA system is turned on 
or off, operation of the LTA system 
continues in the same condition the 
next time the hybrid system is 
started.

Turning LTA system on

284

4-5. Using the driving support systems

LTA indicator

The illumination condition of the 
indicator informs the driver of the 
system operation status.
Illuminated in white: LTA system is 
operating.
Illuminated in green: Steering 
wheel assistance of the steering 
assist function or lane centering 
function is operating.
Flashing in orange: Lane departure 
alert function is operating.

Operation display of steering 
wheel operation support

Displayed when the multi-informa-
tion display is switched to the driv-
ing support system information 
display.
Indicates that steering wheel assis-
tance of the steering assist function 

or lane centering function is operat-
ing.
Both outer sides of the lane are dis-
played: Indicates that steering 
wheel assist of the lane centering 
function is operating.
One outer side of the lane is dis-
played: Indicates that steering 
wheel assist of the steering assist 
function is operating.
Both outer sides of the lane are 
flashing: Alerts the driver that their 
input is necessary to stay in the 
center of the lane (lane centering 
function).

Follow-up cruising display

Displayed when the multi-informa-
tion display is switched to the driv-
ing support system information 
display.
Indicates that steering assist of the 
lane centering function is operating 
by monitoring the position of a pre-
ceding vehicle.
When the follow-up cruising display 
is displayed, if the preceding vehi-
cle moves, your vehicle may move 
in the same way. Always pay care-
ful attention to your surroundings 
and operate the steering wheel as 
necessary to correct the path of the 
vehicle and ensure safety.

Lane departure alert function 
display

Displayed when the multi-informa-
tion display is switched to the driv-
ing support system information 
display.

Indications on multi-infor-
mation display

A

B

C

D

285

4-5. Using the driving support systems

4

Dr

iv

ing



Inside of displayed lines is 
white

Indicates that the system is recog-
nizing white (yellow) lines or a 
course

*

. When the vehicle departs 

from its lane, the white line dis-
played on the side the vehicle 
departs from flashes orange.



Inside of displayed lines is 
black

Indicates that the system is not able 
to recognize white (yellow) lines or 
a course

*

 or is temporarily can-

celed.

*

: Boundary between asphalt and 

the side of the road, such as 
grass, soil, or a curb

■

Operation conditions of each 

function

●

Lane departure alert function

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

• LTA is turned on.

• Vehicle speed is approximately 32 

mph (50 km/h) or more.

*1

• System recognizes white (yellow) 

lane lines or a course

*2

. (When a 

white [yellow] line or course

*2

 is 

recognized on only one side, the 

system will operate only for the 

recognized side.)

• Width of traffic lane is approxi-

mately 9.8 ft. (3 m) or more.

• Turn signal lever is not operated. 

(Vehicle with BSM: Except when 

another vehicle is in the lane on 

the side where the turn signal was 

operated)

• Vehicle is not being driven around 

a sharp curve.

• No system malfunctions are 

detected. (



P.288)

*1

:The function operates even if the 

vehicle speed is less than 
approximately 32 mph (50 km/h) 
when the lane centering function 
is operating.

*2

:Boundary between asphalt and 

the side of the road, such as 
grass, soil, or a curb

●

Steering assist function

This function operates when all of 
the following conditions are met in 
addition to the operation conditions 
for the lane departure alert function.
• Setting for “Steering Assist” in 

 

of the multi-information display is 
set to “ON”. (



P.104)

• 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, TRAC and PCS are 

not operating.

• TRAC or VSC is not turned off.

• Hands off steering wheel warning 

is not displayed. (



P.287)

●

Vehicle sway warning function

286

4-5. Using the driving support systems

This function operates when all of 
the following conditions are met.
• Setting for “Sway Warning” in 

 

of the multi-information display is 
set to “ON”. (



P.104)

• Vehicle speed is approximately 32 

mph (50 km/h) or more.

• Width of traffic lane is approxi-

mately 9.8 ft. (3 m) or more.

• No system malfunctions are 

detected. (



P.288)

●

Lane centering function

This function operates when all of 
the following conditions are met.
• LTA is turned on.

• Setting for “Steering Assist” and 

“Lane Center” in 

 of the multi-

information display are set to 
“ON”. (



P.104)

• This function recognizes white 

(yellow) lane lines or the position 

of a preceding vehicle (except 

when the preceding vehicle is 

small, such as a motorcycle).

• The dynamic radar cruise control 

with full-speed range is operating 

in vehicle-to-vehicle distance con-

trol mode.

• Width of traffic lane is approxi-

mately 10 to 13 ft. (3 to 4 m).

• Turn signal lever is not operated.

• Vehicle is not being driven around 

a sharp curve.

• No system malfunctions are 

detected. (



P.288)

• Vehicle does not accelerate or 

decelerate by a fixed amount or 

more.

• Steering wheel is not operated 

with a steering force level suitable 

for changing lanes.

• ABS, VSC, TRAC and PCS are 

not operating.

• TRAC or VSC is not turned off.

• Hands off steering wheel warning 

is not displayed. (



P.287)

• The vehicle is being driven in the 

center of a lane.

• Steering assist function is not 

operating.

■

Temporary cancelation of func-

tions

●

When operation conditions are no 

longer met, a function may be 

temporarily canceled. However, 

when the operation conditions are 

met again, operation of the func-

tion is automatically restored. 

(



P.285)

●

If the operation conditions 

(



P.285) are no longer met while 

the lane centering function is 

operating, the steering wheel may 

vibrate and the buzzer may sound 

to indicate that the function has 

been temporarily canceled. How-

ever, if the “Steering wheel vibra-

tion” customization setting is set to 

“On”, the system will notify the 

driver by vibrating the steering 

wheel instead of sounding the 

buzzer.

■

Steering assist function/lane 

centering function

●

Depending on the vehicle speed, 

lane departure situation, road con-

ditions, etc., the driver may not 

feel the function is operating or 

the function may not operate at 

all.

●

The steering control of the func-

tion is overridden by the driver’s 

steering wheel operation.

●

Do not attempt to test the opera-

tion of the steering assist function.

■

Lane departure alert function

●

The warning buzzer may be diffi-

cult to hear due to external noise, 

audio playback, etc. Also, it may 

be difficult to feel steering wheel 

vibrations due to the road condi-

tions, etc.

●

If the edge of the course

*

 is not 

clear or straight, the lane depar-

ture alert function may not oper-

ate.

●

Vehicle with BSM: It may not be 

possible for the system to deter-

mine if there is a danger of a colli-

287

4-5. Using the driving support systems

4

Dr

iv

ing

sion with a vehicle in an adjacent 

lane.

●

Do not attempt to test the opera-

tion of the lane departure alert 

function.

*

: Boundary between asphalt and 

the side of the road, such as 
grass, soil, or a curb

■

Hands off steering wheel warn-

ing

In the following situations, a warning 

message urging the driver to hold 

the steering wheel and the symbol 

shown in the illustration are dis-

played on the multi-information dis-

play to warn the driver. The warning 

stops when the system determines 

that the driver holds the steering 

wheel. Always keep your hands on 

the steering wheel when using this 

system, regardless of warnings.

●

When the system determines that 

the driver is driving without hold-

ing the steering wheel while the 

system is operating.

If the driver continues to keep their 
hands off of the steering wheel, the 
buzzer sounds, the driver is warned 
and the function is temporarily can-
celed. This warning also operates in 
the same way when the driver con-
tinuously operates the steering 
wheel only a small amount.
The buzzer also sounds even if the 
alert type is set to “Steering wheel 
vibration”.

●

When the system determines that 

the vehicle may deviate from the 

lane while driving around a curve 

while the lane centering function is 

operating.

Depending on the vehicle condition 
and road conditions, the warning 
may not operate. Also, if the system 
determines that the vehicle is driv-
ing around a curve, warnings will 
occur earlier than during straight-
lane driving.

●

When the system determines that 

the driver is driving without hold-

ing the steering wheel while the 

steering wheel assist of the steer-

ing assist function is operating.

If the driver continues to keep their 
hands off of the steering wheel and 
the steering wheel assist is operat-
ing, the buzzer sounds and the 
driver is warned. Each time the 
buzzer sounds, the continuing time 
of the buzzer becomes longer.
The buzzer also sounds even if the 
alert type is set to “Steering wheel 
vibration”.

■

Vehicle sway warning function

When the system determines that 

the vehicle is swaying while the 

vehicle sway warning function is 

operating, a buzzer sounds and a 

warning message urging the driver 

to rest and the symbol shown in the 

illustration are simultaneously dis-

played on the multi-information dis-

play.

Depending on the vehicle and road 

conditions, the warning may not 

operate.