Content .. 14 15 16 17 ..

Lexus RX450h L (2022 year). Manual in english - page 16

268

4-5. Using the driving support systems

Hybrid system output
Braking force
Time



Figure 2 When hybrid system output restriction control operates



Figure 3 When brake control operates

A
B
C

A
B
C
D

E
F

269

4-5. Using the driving support systems

Driving

Hybrid system output
Braking force
Time
Hybrid system output restriction control begins operating
System determines that possibility of collision with detected object is high
Hybrid system output reduced
System determines that possibility of collision with detected object is extremely
high
Brake control begins operating
Brake control strength increased
Example: Multi-information display: “BRAKE!”
Example: Multi-information display: “Switch to Brake”

■

If the Parking Support Brake has oper-

ated

If the vehicle is stopped due to operation of

the Parking Support Brake, the Parking

Support Brake will be disabled and the

PKSB OFF indicator will illuminate. If the

Parking Support Brake operates unneces-

sarily, brake control can be canceled by

depressing the brake pedal or waiting for

approximately 2 seconds for it to automati-

cally be canceled. Then, the vehicle can be

operated by depressing the accelerator

pedal.

■

Re-enabling the Parking Support Brake

To re-enable the Parking Support Brake

when it has been disabled due to system

operation perform any of the following

operations.
At this time, the PKSB OFF indicator will

turn off. (



P.80)

●

Turn the PKSB (Parking Support Brake)

on (



P.266)

●

The shift lever is in P.

●

Drive with no operation targets in the

traveling direction of the vehicle

●

Change the traveling direction of the

vehicle

A
B
C
D

E
F

270

4-5. Using the driving support systems

■

If “Parking Support Brake Unavailable”

is displayed on the multi-information

display and the PKSB OFF indicator is

flashing

If this message is displayed only when the

shift lever is in any position other than R, a

sensor on the front or rear bumper may be

dirty. Clean the sensors and their surround-

ing area on the bumpers.

■

If “Parking Assist Unavailable” and

“Parking Assist Unavailable Clean

Parking Assist Sensor” are displayed on

the multi-information display and the

PKSB OFF indicator is flashing

●

A sensor may be covered with ice, snow,

dirt, etc. Remove the ice, snow, dirt, etc.,

from the sensor to return the system to

normal.

If this message is shown even after

removing dirt from the sensor, or shown

when the sensor was not dirty to begin

with, have the vehicle inspected by your

Lexus dealer.

●

A sensor may be frozen. Once the ice

melts, the system will return to normal.

●

Water may be continuously flowing over

the sensor surface, such as in a heavy

rain. When the system determines that it

is normal, the system will return to nor-

mal.

■

If a 12-volt battery terminal has been

disconnected and reconnected

The system needs to be initialized. To initial-

ize the system, drive the vehicle straight

ahead for 5 seconds or more at a speed of

approximately 22 mph (35 km/h) or more.

Additionally, for vehicles with the Parking

Support Brake function, turn the steering

wheel fully to the left and right with the vehi-

cle stopped.

271

4-5. Using the driving support systems

Driving

: If equipped

This function will operate in situations such as the following if an object is detected
in the traveling direction of the vehicle.

■

When traveling at a low speed and the brake pedal is not depressed, or is
depressed late

Parking Support Brake function (static objects)

If the sensors detect a static object, such as a wall, in the travelling direction of
the vehicle and the system determines that a collision may occur due to the
vehicle suddenly moving forward due to an accidental accelerator pedal oper-
ation, the vehicle moving the unintended direction due to the wrong shift lever
position, or while parking or traveling at low speeds, the system will operate to
lessen the impact with the detected static object and reduce the resulting
damage.

Examples of function operation

272

4-5. Using the driving support systems

■

When the accelerator pedal is depressed excessively

■

When the vehicle moves in the unintended direction due to the wrong shift
lever position



P.252

■

The Parking Support Brake function

(static object) will operate when

The function will operate when the PKSB

OFF indicator is not illuminated or flashing

Types of sensors

WARNING

■

To ensure the system can operate

properly



P.253

■

If the Parking Support Brake function

(static objects) operates unnecessar-

ily, such as at a railroad crossing



P.253

■

Notes when washing the vehicle



P.254

273

4-5. Using the driving support systems

Driving

(



P.79, 80) and all of the following condi-

tions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is approximately 9

mph (15 km/h) or less.

• There is a static object in the traveling

direction of the vehicle and approxi-

mately 6 to 13 ft. (2 to 4 m) away.

• The Parking Support Brake determines

that a stronger-than-normal brake opera-

tion is necessary to avoid a collision.

●

Brake control

• Hybrid system output restriction control

is operating.

• The Parking Support Brake determines

that an immediate brake operation is nec-

essary to avoid a collision.

■

The Parking Support Brake function

(static objects) will stop operating when

The function will stop operating if any of the

following conditions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is disabled.

• The system determines that the collision

has become avoidable with normal brake

operation.

• The static object is no longer approxi-

mately 6 to 13 ft. (2 to 4 m) away from the

vehicle or in the traveling direction of the

vehicle.

●

Brake control

• The Parking Support Brake is disabled.

• Approximately 2 seconds have elapsed

since the vehicle was stopped by brake

control.

• The brake pedal is depressed after the

vehicle is stopped by brake control.

• The static object is no longer approxi-

mately 6 to 13 ft. (2 to 4 m) away from the

vehicle or in the traveling direction of the

vehicle.

■

Detection range of the Parking Support

Brake function (static objects)

The detection range of the Parking Support

Brake function (static objects) differs from

the detection range of the intuitive parking

assist. (



P.256) Therefore, even if the intu-

itive parking assist detects an object and

provides a warning, the Parking Support

Brake function (static objects) may not start

operating.

■

Situations in which the system may not

operate properly



P.255

■

Situations in which the system may

operate even if there is no possibility of a

collision



P.255

274

4-5. Using the driving support systems

: If equipped

This function will operate in situations such as the following if a vehicle is detected
in the traveling direction of the vehicle.

■

When reversing, a vehicle is approaching and the brake pedal is not
depressed, or is depressed late



P.246

■

The Parking Support Brake function

(rear-crossing vehicles) will operate

when

The function will operate when the PKSB

OFF indicator is not illuminated or flashing

(



P.79, 80) and all of the following condi-

tions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is enabled.

• The vehicle speed is approximately 9

mph (15 km/h) or less.

• Vehicles which are approaching from the

right or left at the rear of the vehicle at a

traveling speed of approximately 5 mph

Parking Support Brake function (rear-crossing vehicles)

If a rear radar sensor detects a vehicle approaching from the right or left at the
rear of the vehicle and the system determines that the possibility of a collision
is high, this function will perform brake control to reduce the likelihood of an
impact with the approaching vehicle.

Examples of function operation

Types of sensors

WARNING

■

To ensure the system can operate

properly



P.246

275

4-5. Using the driving support systems

Driving

(8 km/h) or more.

• The shift lever is in R.

• The Parking Support Brake determines

that a stronger than normal brake opera-

tion is necessary to avoid a collision with

an approaching vehicle.

●

Brake control

• Hybrid system output restriction control

is operating.

• The Parking Support Brake determines

that an emergency brake operation is

necessary to avoid a collision with an

approaching vehicle.

■

The Parking Support Brake function

(rear-crossing vehicles) will stop operat-

ing when

The function will stop operating if any of the

following conditions are met:

●

Hybrid system output restriction control

• The Parking Support Brake is disabled.

• The collision becomes avoidable with

normal brake operation.

• A vehicle is no longer approaching from

the right or left at the rear of the vehicle.

●

Brake control

• The Parking Support Brake is disabled.

• Approximately 2 seconds have elapsed

since the vehicle was stopped by brake

control.

• The brake pedal is depressed after the

vehicle is stopped by brake control.

• A vehicle is no longer approaching from

the right or left at the rear of the vehicle.

■

Detection area of the Parking Support

Brake function (rear-crossing vehicles)

The detection area of the Parking Support

Brake function (rear-crossing vehicles) dif-

fers from the detection area of the RCTA

function (



P.261). Therefore, even if the

RCTA function detects a vehicle and pro-

vides an alert, the Parking Support Brake

function (rear-crossing vehicles) may not

start operating.

■

Situations in which the system may not

operate properly



P.262

■

Situations in which the system may

operate even if there is no possibility of a

collision



P.263

276

4-5. Using the driving support systems



Except F SPORT models

Normal mode

Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
Press the switch to change the driving
mode to normal mode when Eco drive
mode or sport mode is selected.

Eco drive mode

Helps the driver accelerate in an
eco-friendly manner and improve fuel
economy through moderate throttle char-
acteristics and by controlling the operation
of the air conditioning system (heat-
ing/cooling).
When not in Eco drive mode, if the driving

mode select switch is turned to the left, the
Eco drive mode indicator will come on.

Sport mode

Controls the hybrid system to provide
quick, powerful acceleration. This mode
also changes the steering feel, making it
suitable for when agile driving response is
desired, such as when driving on roads
with many curves.
When not in sport mode, if the driving
mode select switch is turned to the right,
the “Sport” indicator will comes on.



F SPORT models (vehicles with
Adaptive Variable Suspension Sys-
tem)

Normal mode/Custom mode

Normal mode and custom mode are
selected by pressing the driving mode
select switch. Each time the switch is
pressed, the driving mode changes
between normal mode and custom mode.
When custom mode is selected, the “Cus-
tom” indicator will be illuminated.
When Eco drive mode or sport mode is

Driving mode select switch

The driving modes can be selected
to suit driving conditions.

Selecting a drive mode

277

4-5. Using the driving support systems

Driving

selected, pressing the switch changes the
driving mode to normal mode.
• Normal mode
Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Suitable for city driving.
• Custom mode
Allows you to drive with the following func-
tions set to your preferred settings. Cus-
tom mode settings can only be changed on
the drive mode customization display of
the Center Display. (



P.294)

Eco drive mode

Sport mode

• Sport S mode
Controls the hybrid system to provide
quick, powerful acceleration. This mode is
suitable for when agile driving response is
desired, such as when driving on roads
with many curves.
When not in Sport S mode, if the driving

mode select switch is turned to the right,
the “Sport S” indicator will come on.
• Sport S+ mode
Helps to ensure steering performance and
driving stability by simultaneously con-
trolling the steering and suspension in
addition to the hybrid system. Suitable for
sportier driving.
When in Sport S mode, if the driving mode
select switch is turned to the right, the
“Sport S+” indicator will come on.



F SPORT models (vehicles without
Adaptive Variable Suspension Sys-
tem)

Normal mode

Eco drive mode

Helps the driver accelerate in an
eco-friendly manner and improve fuel

Function

Setting

Powertrain

Normal

Power

Eco

Chassis

Normal

Sport

Air conditioning sys-
tem

Normal

Eco

278

4-5. Using the driving support systems

economy through moderate throttle char-
acteristics and by controlling the operation
of the air conditioning system (heat-
ing/cooling).
When not in Eco drive mode, if the driving
mode select switch is turned to the left, the
Eco drive mode indicator will come on.

Sport mode

■

Operation of the air conditioning sys-

tem in Eco drive mode

Eco drive mode controls the heating/cool-

ing operations and fan speed of the air con-

ditioning system to enhance fuel efficiency.

To improve air conditioning performance,

adjust the fan speed or turn off Eco drive

mode.

■

Automatic deactivation of sport mode

and custom mode

If the power switch is turned off after driving

in sport mode or custom mode, the drive

mode will be changed to normal mode.

■

Driving mode pop-up display (12.3-inch

display only)

When the driving mode is changed, the

selected driving mode will be temporarily

displayed on the side display. (



P.294)

■

ECB (Electronically Controlled
Brake System)

The electronically controlled system
generates braking force correspond-
ing to the brake operation

■

ABS (Anti-lock Brake System)

Helps to prevent wheel lock when the
brakes are applied suddenly, or if the
brakes are applied while driving on a
slippery road surface

■

Brake assist

Generates an increased level of brak-
ing force after the brake pedal is
depressed when the system detects a
panic stop situation

■

VSC (Vehicle Stability Control)

Helps the driver to control skidding
when swerving suddenly or turning on
slippery road surfaces

■

Enhanced VSC (Enhanced Vehi-
cle Stability Control)

Provides cooperative control of the
ABS, TRAC, VSC and EPS.

Driving assist systems

To keep driving safety and perfor-
mance, the following systems oper-
ate automatically in response to
various driving situations. Be aware,
however, that these systems are
supplementary and should not be
relied upon too heavily when oper-
ating the vehicle.

Summary of the driving assist
systems

279

4-5. Using the driving support systems

Driving

Helps to maintain directional stability
when swerving on slippery road sur-
faces by controlling steering perfor-
mance.

■

Trailer Sway Control (if equipped)

Helps the driver to control trailer sway
by selectively applying brake pressure
for individual wheels and reducing
driving torque when trailer sway is
detected.

■

TRAC (Traction Control)

Helps to maintain drive power and pre-
vent the drive wheels from spinning
when starting the vehicle or accelerat-
ing on slippery roads

■

Active Cornering Assist (ACA)

Helps to prevent the vehicle from drift-
ing to the outer side by performing
inner wheel brake control when
attempting to accelerate while turning

■

Hill-start assist control

Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill

■

EPS (Electric Power Steering)

Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel

■

E-Four

Electronic On-Demand AWD system.
Automatically switches from
front-wheel drive to all-wheel drive
(AWD) according to the driving condi-
tions, helping to ensure reliable han-
dling and stability. Examples of
conditions where the system will switch

to AWD are when cornering, going
uphill, starting off or accelerating, and
when the road surface is slippery due
to snow, rain, etc.

■

Adaptive Variable Suspension Sys-
tem (if equipped)

Controls the damping force of the
shock absorber of each wheel accord-
ing to the road and driving conditions,
helping achieve a comfortable ride,
excellent driveability and a high level of
stability.
If Sport S+ mode is selected using the
driving mode select switch, the damp-
ing force will become more suitable for
sporty driving. (



P.276)

■

VDIM (Vehicle Dynamics Inte-
grated Management)

Provides integrated control of the
ABS, brake assist, TRAC, VSC,
hill-start assist control and EPS systems
Helps to maintain vehicle stability when
swerving on slippery road surfaces by
controlling the brakes, hybrid system
output and steering assist.

■

The Secondary Collision Brake

When the SRS airbag sensor detects a
collision and the system operates, the
brakes and brake lights are automati-
cally controlled to reduce the vehicle
speed and help reduce the possibility
of further damage due to a secondary
collision.

■

When the TRAC/VSC/ABS/Trailer

Sway Control systems are operating

The slip indicator light will flash while the

TRAC/VSC/ABS/Trailer Sway Control

systems are operating.

280

4-5. Using the driving support systems

■

Disabling the TRAC system

If the vehicle gets stuck in mud, dirt or snow,

the TRAC system may reduce power from

the hybrid system to the wheels. Pressing
the

switch to turn the system off may

make it easier for you to rock the vehicle in

order to free it.
To turn the TRAC system off, quickly press
and release the

switch.

The “Traction Control Turned Off” will be
shown on the multi-information display.

Press the

switch again to turn the sys-

tem back on.

■

Turning off both TRAC, VSC and Trailer

Sway Control systems

To turn the TRAC, VSC and Trailer Sway

Control systems off, press and hold the

switch for more than 3 seconds while

the vehicle is stopped.
The VSC OFF indicator light will come on
and the “Traction Control Turned Off” will
be shown on the multi-information display.

Press the

switch again to turn the sys-

tem back on.

: On vehicles with PCS (Pre-Collision

System), PCS will also be disabled (only

Pre-Collision warning is available). The
PCS warning light will come on and a
message will be displayed on the
multi-information display. (



P.218)

■

When the message is displayed on the

multi-information display showing that

TRAC has been disabled even if the

switch has not been pressed

TRAC is temporary deactivated. If the infor-

mation continues to show, contact your

Lexus dealer.

■

Operating conditions of hill-start assist

control

When the following four conditions are met,

the hill-start assist control will operate:

●

The shift lever is in a position other than P

or N (when starting off forward/back-

ward on an upward incline)

●

The vehicle is stopped

●

The accelerator pedal is not depressed

●

The parking brake is not engaged

■

Automatic system cancelation of

hill-start assist control

The hill-start assist control will turn off in any

of the following situations:

●

The shift lever is shifted to P or N

●

The accelerator pedal is depressed

●

The parking brake is engaged

●

2 seconds at maximum elapsed after the

brake pedal is released

■

Sounds and vibrations caused by the

ABS, brake assist, VSC, Trailer Sway

Control, TRAC and hill-start assist con-

trol systems

●

A sound may be heard from the engine

compartment when the brake pedal is

depressed repeatedly, when the hybrid

system is started or just after the vehicle

begins to move. This sound does not indi-

cate that a malfunction has occurred in

any of these systems.

●

Any of the following conditions may

occur when the above systems are oper-

ating. None of these indicates that a mal-

function has occurred.

281

4-5. Using the driving support systems

Driving

• Vibrations may be felt through the vehicle

body and steering.

• A motor sound may be heard also after

the vehicle comes to a stop.

■

ECB operating sound

ECB operating sound may be heard in the

following cases, but it does not indicate that

a malfunction has occurred.

●

Operating sound heard from the engine

compartment when the brake pedal is

operated.

●

Motor sound of the brake system heard

from the front part of the vehicle when

the driver’s door is opened.

●

Operating sound heard from the engine

compartment when one or two minutes

passed after the stop of the hybrid sys-

tem.

■

Active Cornering Assist operation

sounds and vibrations

When the Active Cornering Assist is oper-

ated, operation sounds and vibrations may

be generated from the brake system, but

this is not a malfunction.

■

EPS operation sound

When the steering wheel is operated, a

motor sound (whirring sound) may be

heard. This does not indicate a malfunction.

■

Reduced effectiveness of the EPS sys-

tem

The effectiveness of the EPS system is

reduced to prevent the system from over-

heating when there is frequent steering

input over an extended period of time. The

steering wheel may feel heavy as a result.

Should this occur, refrain from excessive

steering input or stop the vehicle and turn

the hybrid system off. The EPS system

should return to normal within 10 minutes.

■

Automatic reactivation of TRAC, Trailer

Sway Control and VSC systems

After turning the TRAC, Trailer Sway Con-

trol and VSC systems off, the systems will

be automatically re-enabled in the following

situations:

●

When the power switch is turned off

●

If only the TRAC system is turned off, the

TRAC will turn on when vehicle speed

increases

If both the TRAC and VSC systems are

turned off, automatic re-enabling will not

occur when vehicle speed increases.

■

Operating conditions of Active Corner-

ing Assist

The system operates when the following

occurs.

●

TRAC/VSC can operate

●

The driver is attempting to accelerate

while turning

●

The system detects that the vehicle is

drifting to the outer side

●

The brake pedal is released

■

Secondary Collision Brake operating

conditions

The system operates when the SRS airbag

sensor detects a collision while the vehicle

is in motion.

However, the system does not operate in

any of the following situations.

●

The vehicle speed is below 6 mph (10

km/h)

●

Components are damaged

■

Secondary Collision Brake automatic

cancellation

The system is automatically canceled in any

of the following situations.

●

The vehicle speed drops below approxi-

mately 6 mph (10 km/h)

●

A certain amount of time elapses during

operation

●

The accelerator pedal is depressed a

large amount

WARNING

■

The ABS does not operate effectively

when

●

The limits of tire gripping performance

have been exceeded (such as exces-

sively worn tires on a snow covered

road).

●

The vehicle hydroplanes while driving

at high speed on wet or slick roads.

282

4-5. Using the driving support systems

WARNING

■

Stopping distance when the ABS is

operating may exceed that of normal

conditions

The ABS is not designed to shorten the

vehicle’s stopping distance. Always main-

tain a safe distance from the vehicle in

front of you, especially in the following

situations:

●

When driving on dirt, gravel or

snow-covered roads

●

When driving with tire chains

●

When driving over bumps in the road

●

When driving over roads with potholes

or uneven surfaces

■

TRAC/VSC may not operate effec-

tively when

Directional control and power may not

be achievable while driving on slippery

road surfaces, even if the TRAC/VSC

system is operating. Drive the vehicle

carefully in conditions where stability and

power may be lost.

■

Active Cornering Assist does not

operate effectively when

●

Do not overly rely on Active Corner-

ing Assist. Active Cornering Assist

may not operate effectively when

accelerating down slopes or driving on

slippery road surfaces.

●

When Active Cornering Assist fre-

quently operates, Active Cornering

Assist may temporarily stop operating

to ensure proper operation of the

brakes, TRAC and VSC.

■

Hill-start assist control does not oper-

ate effectively when

●

Do not overly rely on hill-start assist

control. Hill-start assist control may

not operate effectively on steep

inclines and roads covered with ice.

●

Unlike the parking brake, hill-start

assist control is not intended to hold

the vehicle stationary for an extended

period of time. Do not attempt to use

hill-start assist control to hold the vehi-

cle on an incline, as doing so may lead

to an accident.

■

When the TRAC/ABS/VSC/Trailer

Sway Control is activated

The slip indicator light flashes. Always

drive carefully. Reckless driving may

cause an accident. Exercise particular

care when the indicator light flashes.

■

When the TRAC/VSC/Trailer Sway

Control systems are turned off

●

Be especially careful and drive at a

speed appropriate to the road condi-

tions. As these are the systems to help

ensure vehicle stability and driving

force, do not turn the

TRAC/VSC/Trailer Sway Control sys-

tems off unless necessary.

●

Trailer Sway Control is part of the VSC

system and will not operate if VSC is

turned off or experiences a malfunc-

tion.

■

Replacing tires

Make sure that all tires are of the speci-

fied size, brand, tread pattern and total

load capacity. In addition, make sure that

the tires are inflated to the recom-

mended tire inflation pressure level.
The ABS, TRAC, Trailer Sway Control

and VSC systems will not function cor-

rectly if different tires are installed on the

vehicle.

Contact your Lexus dealer for further

information when replacing tires or

wheels.

■

Handling of tires and the suspension

Using tires with any kind of problem or

modifying the suspension will affect the

driving assist systems, and may cause a

system to malfunction.

283

4-5. Using the driving support systems

Driving

WARNING

■

Trailer Sway Control precaution

The Trailer Sway Control system is not

able to reduce trailer sway in all situa-

tions. Depending on many factors such

as the conditions of the vehicle, trailer,

road surface and driving environment,

the Trailer Sway Control system may not

be effective. Refer to your trailer owner’s

manual for information on how to tow

your trailer properly.

■

If trailer sway occurs

Observe the following precautions.

Failing to do so may cause death or seri-

ous injury.

●

Firmly grip the steering wheel. Steer

straight ahead. Do not try to control

trailer sway by turning the steering

wheel.

●

Begin releasing the accelerator pedal

immediately but very gradually to

reduce speed.

Do not increase speed. Do not apply

vehicle brakes.

If you make no extreme correction with

the steering or brakes, your vehicle and

trailer should stabilize.

■

Secondary Collision Brake

Do not rely solely upon the Secondary

Collision Brake. This system is designed

to help reduce the possibility of further

damage due to a secondary collision,

however, that effect changes according

to various conditions. Overly relying on

the system may result in death or serious

injury.

Content .. 14 15 16 17 ..