LEXUS LS 500 (2019 year). Instruction — part 18
284
4-5. Using the driving support systems
LS500_OM_(U)_1809
●
Objects which are extremely close to a
radar sensor
●
Vehicles which are approaching from the
right or left at the rear of the vehicle at a
traveling speed of less than approxi-
mately 5 mph (8 km/h)
●
Vehicles which are approaching from the
right or left at the rear of the vehicle at a
traveling speed of more than approxi-
mately 15 mph (24 km/h)
■
PKSB buzzer
If the Parking Support Brake is enabled and
brake control is performed, a buzzer will
sound to notify the driver.
■
Situations in which the system may
operate even though there is no possi-
bility of a collision
In some situations such as the following, the
Parking Support Brake function
(rear-crossing vehicles) may operate even
though there is no possibility of a collision.
●
When the parking space faces a street
and vehicles are being driven on the
street
●
When a detected vehicle turns while
approaching the vehicle
●
When a vehicle passes by the side of your
vehicle
●
When the distance between your vehicle
and metal objects, such as a guardrail,
wall, sign, or parked vehicle, which may
reflect electrical waves toward the rear of
the vehicle, is short
●
When there are spinning objects near
your vehicle such as the fan of an air con-
ditioning unit
●
When water is splashed or sprayed
toward the rear bumper, such as from a
sprinkler
■
Situations in which the Parking Support
Brake function (rear-crossing vehicles)
may not operate properly
In some situations, such as the following, the
radar sensors may not detect an object and
this function may not operate properly
●
Stationary objects
●
When a sensor or the area around a sen-
sor is extremely hot or cold
●
If the rear bumper is covered with ice,
snow, dirt, etc.
●
When it is raining heavily or water strikes
the vehicle
●
If the vehicle is significantly tilted
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4-5. Using the driving support systems
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Driving
●
When equipment that may obstruct a
sensor is installed, such as a towing eye-
let, bumper protector (an additional trim
strip, etc.), bicycle carrier, or snow plow
●
If the suspension has been modified or
tires of a size other than specified are
installed
●
If the front of the vehicle is raised or low-
ered due to the carried load
●
If an electronic component, such as a
backlit license plate (especially fluores-
cent type), fog lights, fender pole or wire-
less antenna is installed near a radar
sensor
●
If the orientation of a radar sensor has
been changed
●
When multiple vehicles are approaching
with only a small gap between each vehi-
cle
●
If a vehicle is approaching the rear of
your vehicle rapidly
●
Situations in which the radar sensor may
not detect a vehicle
• When a vehicle approaches from the
right or left at the rear of the vehicle while
you are turning while backing up
• When turning while backing up
• When backing out of a shallow angle
parking spot
• When backing up on a slope with a sharp
change in grade
• When a vehicle turns into the detection
area
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4-5. Using the driving support systems
LS500_OM_(U)_1809
*
: If equipped
When a pedestrian is detected behind the vehicle while backing up, the brake
pedal is not depressed or is depressed late.
Displays a message to urge the driver
to take evasive action when a pedes-
trian is detected in the detection area
behind the vehicle. (A message will
also be displayed on the multi-informa-
tion display and head-up display (if
equipped).)
Pedestrian detection icon with
brake reminder
Parking Support Brake function (rear pedestrians)
*
If the rear camera sensor detects a pedestrian behind the vehicle while back-
ing up and the system determines that the possibility of colliding with the
detected pedestrian is high, a buzzer will sound. If the system determines that
the possibility of colliding with the detected pedestrian is extremely high, the
brakes will be applied automatically to help reduce the impact of the collision.
Examples of system operation
Center Display
A
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Driving
■
Parking Support Brake function (rear
pedestrians) will operate when
The function will operate when the PKSB
OFF indicator is not illuminated or flashing
(
P.69, 70) and all of the following condi-
tions are met:
●
Engine output restriction control
• The Parking Support Brake is enabled.
• The vehicle speed is 9 mph (15 km/h) or
less.
• The shift position is in R.
• The rear camera sensor detects a pedes-
trian behind the vehicle while backing up
and the system determines that the possi-
bility of colliding with the detected
pedestrian is high.
●
Brake control
• Engine output restriction control is oper-
ating.
• The Parking Support Brake determines
that an emergency brake operation is
necessary to avoid a collision with a
pedestrians.
■
The Parking Support Brake function
(rear pedestrians) will stop operating
when
The function will stop operating if any of the
following conditions are met:
●
Engine output restriction control
• The Parking Support Brake is disabled.
• The collision becomes avoidable with
normal brake operation.
• The pedestrian is no longer detected
behind your 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 pedestrian is no longer detected
behind your vehicle.
■
Re-enabling the Parking Support Brake
function (rear pedestrians)
■
Detection area of the Parking Support
Brake function (rear pedestrians)
The detection area of the Parking Support
Brake function (rear pedestrians) differs
from the detection area of the RCD func-
tion (
P.268). Therefore, even if the RCD
function detects a vehicle and provides an
alert, the Parking Support Brake function
(rear-crossing vehicles) may not start oper-
ating.
■
Situations in which the system may not
operate properly
●
Some pedestrians, such as the following,
may not be detected by the Parking Sup-
port Brake function (rear pedestrians),
preventing the function from operating
properly:
• Pedestrians who are bending forward or
squatting
• Pedestrians who are lying down
• Pedestrians who are running
• Pedestrians who suddenly enter the
detection area
WARNING
■
If the Parking Support Brake function
(rear pedestrians) operates unneces-
sarily
Depress the brake pedal immediately
after the Parking Support Brake function
(rear pedestrians) operates. (Operation
of the function is canceled by depressing
the brake pedal.)
■
Correct use of the Parking Support
Brake function (rear pedestrians)
Do not overly rely on the Parking Sup-
port Brake function (rear pedestrians).
Depending on the road conditions, vehi-
cle conditions and weather, this function
may not operate correctly. As the detec-
tion performance of the rear camera is
limited, always drive safely, taking care to
observe your surroundings.
Additionally, if the PKSB OFF indictor is
flashing or a warning message is dis-
played on the center display indicating
that the Parking Support Brake function
(rear pedestrians) is unavailable, the
function cannot be used. Even if these
warnings are not output, the driver is
always responsible for paying attention
to the vehicle’s surroundings and driving
safely.
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4-5. Using the driving support systems
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• People riding a bicycle, skateboard, or
other light vehicle
• Pedestrians wearing oversized clothing
such as a rain coat, long skirt, etc., making
their silhouette obscure
• Pedestrians whose body is partially hid-
den by an object, such as a cart or
umbrella
• Pedestrians which are obscured by dark-
ness, such as at night
●
In some situations, such as the following,
pedestrians may not be detected by the
Parking Support Brake function (rear
pedestrians), preventing the function
from operating properly:
• When backing up in inclement weather
(rain, snow, fog, etc.)
• When the rear camera is obscured (dirt,
snow, ice, etc. are attached) or scratched
• When a very bright light, such as the sun,
or the headlights of another vehicle,
shines directly into the rear camera
• When backing up in a place where the
surrounding brightness changes sud-
denly, such as at the entrance or exit of a
garage or underground parking lot
• When backing up in a dim environment
such as during dusk or in an underground
parking lot
●
Even though there are no pedestrians in
the detection area, some objects, such as
the following, may be detected, possibly
causing the Parking Support Brake func-
tion (rear pedestrians) to operate.
• Three dimensional objects, such as a
pole, traffic cone, fence, or parked vehi-
cle
• Moving objects, such as a car or motor-
cycle
• Objects moving toward your vehicle
when backing up, such as flags or pud-
dles (or airborne matter, such as smoke,
steam, rain, or snow)
• Cobblestone or gravel roads, tram rails,
road repairs, white lines, pedestrian
crossings or fallen leaves on the road
• Metal covers (gratings), such as those
used for drainage ditches
• Objects reflected in a puddle or on a wet
road surface
• The roadside or bumps on the road
• Shadows on the road
●
In some situations, such as the following,
the Parking Support Brake function (rear
pedestrians) may operate even though
there are no pedestrians in the detection
area.
• When backing up toward the roadside or
a bump on the road
• If the vehicle is significantly tilted, such as
when carrying a heavy load
• When backing up toward an
incline/decline
• If the suspension has been modified or
tires of a size other than specified are
installed
• If the rear of the vehicle is raised or low-
ered due to the carried load
• If an electronic component, such as a
backlit license plate or rear fog light, is
installed near the rear camera
• If a bumper protector, such as an addi-
tional trim strip, is installed to the rear
bumper
• If the orientation of the rear camera has
been changed
• If a towing eyelet is installed to the rear of
the vehicle
• When water is flowing over the rear cam-
era lens
• When the rear camera is obscured (dirt,
snow, ice, etc. are attached) or scratched
• If there is a flashing light in the detection
area, such as the emergency flashers of
another vehicle
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Driving
Vehicles without Adaptive Variable
Suspension System
1
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 not in normal
mode.
2
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 backward, the
Eco drive mode indicator will come on.
3
Sport mode
Controls the transmission and engine to
provide quick, powerful acceleration. This
mode also changes the steering feel, mak-
ing 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 forward, the
sport mode indicator will comes on.
Vehicles with Adaptive Variable
Suspension System
Except F SPORT models
F SPORT models
1
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 normal mode is selected, the normal
mode indicator comes on.
When custom mode is selected, the cus-
tom mode indicator comes on.
Press the switch to change the driving
mode to normal mode when not in normal
mode.
• Normal mode
Provides an optimal balance of fuel econ-
omy, quietness, and dynamic performance.
Driving mode select switch
The driving modes can be selected
to suit driving condition.
Selecting a drive mode
A
B
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Suitable for city driving.
When the shift position is in D, an appropri-
ate gear for sporty driving may automati-
cally be selected according to driver
performance and driving conditions.
• Custom mode
Allows you to drive with the powertrain,
chassis and air conditioning system 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. (
2
Comfort mode
By controlling the suspension, riding com-
fort is further enhanced. Suitable for city
driving.
When not in comfort mode and the driving
mode select switch is turned backward, the
comfort mode indicator comes on.
3
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 in comfort mode, if the driving mode
select switch is turned backward, the Eco
drive mode indicator comes on.
4
Sport mode
• Sport S mode
Controls the transmission and engine 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 forward, the
Sport S mode indicator comes on.
• Sport S+ mode
Helps to ensure steering performance and
driving stability by simultaneously con-
trolling the steering and suspension in
addition to the transmission and engine.
Suitable for sportier driving.
When in Sport S mode, if the driving mode
select switch is turned forward, the Sport
S+ mode indicator comes on.
■
If the driving mode select switch is oper-
ated while the opening screen is being
displayed
If the driving mode select switch is operated
while the opening screen is being displayed,
the driving mode will be changed and the
meter display will change accordingly after
the opening screen operation has com-
pleted.
■
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,
perform the following operations:
●
Turn off eco air conditioning mode
(
●
Adjust the fan speed (
●
Turn off Eco drive mode
■
Automatic deactivation of sport mode
and custom mode
If the engine switch is turned off after driv-
ing in sport mode or custom mode, the
drive mode will be changed to normal
mode.
■
Driving mode pop-up display
When the driving mode is changed, the
selected driving mode will be temporarily
displayed on the side display. (
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Driving
*
: If equipped
■
Situations in which the vehicle height
control may not operate properly
●
In the following situations, the vehicle
height may change slowly or may not
change to the correct height:
• When the vehicle comes into contact
with snow, ice, stone, etc.
• When the ambient temperature is low
• When the accumulator tank pressure is
low
●
In the following situations, the vehicle
height may not change:
• If the hood or trunk is not fully closed
• If the brake pedal depressed and the
vehicle is stopped
• When the vehicle is on a significantly
uneven or undulating road
• When the vehicle is on a slanted road or a
slope
■
Operating sound of the air suspension
compressor and valves
When the vehicle height is changed, such
as due to passengers entering the vehicle or
cargo being loaded, or when the vehicle
height is changed using the vehicle height
adjustment switch, the air suspension com-
pressor and valves may operate and a
sound may be heard. This does not indicate
a malfunction.
■
When the accumulator tank pressure is
low
When the accumulator tank pressure is low,
the air suspension compressor and valves
may operate repeatedly even though the
vehicle height is not being changed. This
does not indicate a malfunction.
Electronically modulated air
suspension
*
The height of the vehicle when driv-
ing can be selected using the vehi-
cle height adjustment switch. The
selected height level will be main-
tained regardless of the number of
passengers or weight of cargo.
Additionally, settings of the follow-
ing functions can be changed:
Enabling/Disabling controls of
access mode
Temporarily disabling vehicle
height control
WARNING
■
Situations in which the operation of
the electronically modulated air sus-
pension should be temporarily dis-
abled
In the following situations, make sure to
temporarily disable all functions of the
vehicle height control of the electroni-
cally modulated air suspension and then
stop the engine. Otherwise, the vehicle
height may change and part of your body
may be caught under the vehicle, possi-
bly causing injury.
●
When the vehicle is parked on a curb
●
If any of the wheels is not touching the
ground
●
If the vehicle needs to be jacked up
●
If the vehicle is to be tied down
●
If the vehicle is to be towed
■
Vehicle height control precautions
In the following situations, make sure to
check the safety of the area around the
vehicle, as the vehicle height may change
and part of someone’s body may be
caught in the vehicle, possibly causing
injury or the vehicle may be damaged.
●
When opening a door
●
When unlocking the doors using the
smart access system with push-button
start
●
When changing the vehicle height
using the vehicle height adjustment
switch
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To adjust the vehicle height to one
appropriate for road and driving con-
ditions, press the vehicle height adjust-
ment switch.
Turns high mode on/off.
When high mode is enabled, the high
mode indicator on the meter will illuminate.
The vehicle height will increase by approxi-
mately 0.8 in. (20 mm) from its normal
position.
When the vehicle height is increased by a
control of access mode press the vehicle
height adjustment switch twice to
enable/disable high mode.
■
The vehicle height adjustment switch
can be used to change the mode when
The engine switch is in IGNITION ON
mode.
■
System protection function
If the vehicle height is repeatedly increased
and decreased using the vehicle height
adjustment switch, etc., the system may not
operate temporarily.
In order to improve the ease of enter-
ing and exiting the vehicle, the vehicle
height will increase automatically.
Enter control
If any of the following operations are
performed, the vehicle height will
increase automatically:
When the doors are unlocked using
the smart access system with
push-button start
When the doors are unlocked using
the wireless remote control and
then a door is opened.
The vehicle height will increase by approxi-
mately 1.2 in. (30 mm) from its normal
position.
The vehicle height may not increase, if the
vehicle height already reaches the
selected height.
The vehicle will return to its normal height
when the vehicle speed reaches approxi-
mately 12 mph (20 km/h).
Exit control
When “Select Parking Height” is set to
“High”, the vehicle height will automati-
NOTICE
■
Parking precaution
If the vehicle is parked for a long time, the
vehicle height may change due to
changes in the ambient temperature.
When parking the vehicle, make sure
that the area above and below the vehi-
cle is clear, so that the vehicle will not
contact anything if its height changes.
Be careful when parking the vehicle in an
area with a low ceiling or near low hang-
ing objects, as the vehicle height will
increase when passengers exit the vehi-
cle and exit control of access mode
operates.
Selecting the vehicle height
Vehicle height control when
entering/exiting the vehicle
(“Access Mode”)
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4
Driving
cally increase when the P shift position
is selected and a door is opened.
1
Press
or
to select
.
2
Press
or
to select “Vehicle
Settings” and then press
.
3
Press
or
to select
and then press
.
4
Press
or
to select “Select
Parking Height” and then press
.
The vehicle height will increase by approxi-
mately 0.4 in. (10 mm) from its normal
position.
The vehicle height may not increase, if the
vehicle height already reaches the
selected height.
The vehicle will return to its normal height
when the vehicle speed reaches approxi-
mately 12 mph (20 km/h).
■
Enabling/Disabling access mode
1
Press the
or
meter control
switch to select
.
2
Press the
or
meter control
switch to select “Vehicle Settings”
and then press
.
3
Press the
or
meter control
switch to select
and then
press .
4
Press the
or
meter control
switch to select “Access Mode”
and then press
.
The setting will change between
enabled/disabled each time the
meter control switch is pressed.
■
When the vehicle height has been
increased by a control of access mode
Press the vehicle height adjustment switch
with the engine switch in any mode to return
the vehicle to its previous vehicle height.
■
Access mode operation
●
Access mode will not operate if the vehi-
cle is not parked on a level road surface.
●
When the P shift position is selected, if
the doors are not locked and any door is
opened from the outside, exit control will
operate.
Vehicle height control can be tempo-
rarily disabled using the meter control
switches. (
When to temporarily disable vehicle height
control:
1
Press
or
to select
.
2
Press
or
to select “Vehicle
Settings” and then press
.
3
Press
or
to select
and then press
.
4
Press
or
to select “Height
Control” and then press
.
This setting is memorized even if the
engine switch is turned off.
Even if the vehicle height control func-
tions are disabled, they will be enabled
automatically when the vehicle speed
reaches approximately 19 mph (30
km/h).
Temporarily disabling vehicle
height control
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■
When “Check Air Suspension System”
is displayed on the multi-information
display
The system may not operate properly. Have
the vehicle inspected by your Lexus dealer.
■
Customization
Some functions can be customized.
(
■
ECB (Electronically Controlled
Brake System) (vehicles with Lexus
Safety System + A)
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.
■
Secondary Collision Brake
When the airbag sensor detects a colli-
sion, the brakes and stop lights are
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
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4
Driving
automatically controlled to reduce the
vehicle speed and that helps reduce
the possibility of further damage due to
a secondary collision.
■
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
■
Hill-start assist control
Helps to reduce the backward move-
ment of the vehicle when starting on an
uphill
■
VGRS (Variable Gear Ratio Steer-
ing) (if equipped)
Adjusts the front wheel turning angle in
accordance with the vehicle speed and
steering wheel movement
■
DRS (Dynamic Rear Steering) (if
equipped)
Contributes to the turning characteris-
tics and responsiveness of the vehicle
by adjusting the rear wheel angle of the
vehicle in accordance with steering
wheel movement.
■
EPS (Electric Power Steering)
Employs an electric motor to reduce
the amount of effort needed to turn the
steering wheel.
■
Active stabilizer suspension sys-
tem (if equipped)
Reduces sway when cornering accord-
ing to steering wheel movement in
order to maintain a stable vehicle pos-
ture.
■
Adaptive Variable Suspension Sys-
tem (if equipped)
By independently controlling the
damping force of the shock absorbers
for each of the 4 wheels according to
the road and driving conditions, this
system helps riding comfort with supe-
rior vehicle stability, and helps good
vehicle posture.
Also, the damping force changes
depending on the selected driving
mode. (
■
LDH (Lexus Dynamic Handling
system) (if equipped)
Provides integrated control of the
VGRS, DRS and EPS. Contributes to
turning characteristics at low speeds,
responsiveness at medium speeds and
safety at high speeds by controlling the
steering angle of the front and rear
wheels in accordance with the steering
wheel operation and vehicle speed.
■
VDIM (Vehicle Dynamics Inte-
grated Management)
Provides integrated control of the
ABS, brake assist, TRAC, VSC,
hill-start assist control, EPS, VGRS (if
equipped), DRS (if equipped), active
stabilizer suspension system (if
equipped) and Adaptive Variable Sus-
pension System (if equipped)
Helps to maintain vehicle stability when
swerving on slippery road surfaces by
controlling the brakes, engine output,
steering assist, and steering ratio
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4-5. Using the driving support systems
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■
When the TRAC/VSC systems are
operating (vehicles without Lexus
Safety System + A)
The slip indicator light will flash while the
TRAC/VSC systems are operating.
■
When the TRAC/VSC/ABS systems are
operating (vehicles with Lexus Safety
System + A)
The slip indicator light will flash while the
TRAC/VSC/ABS systems are operating.
■
Disabling the TRAC system
If the vehicle gets stuck in mud, dirt or snow,
the TRAC system may reduce power from
the engine 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.
■
Disabling both TRAC and VSC systems
To turn the TRAC and VSC 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. (
■
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 cannot be operated. 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 position is in a position other
than P or N (when stating off for-
ward/backward 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
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4
Driving
of the following situations:
●
Shift the shift position 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
■
VGRS is disabled when
VGRS may stop operating in the following
situations.
In this event, the steering wheel may move
from its straight forward position, but it will
return when the system restarts.
●
When the steering wheel is operated for
an extended period of time while the
vehicle is stopped or is moving very
slowly (on vehicles with LDH, DRS is dis-
abled together with VGRS)
●
When the steering wheel has been held
fully to the left or right
The center position of the steering wheel
may change when VGRS is disabled. How-
ever, the position will return to normal after
VGRS is reactivated.
■
When the battery is disconnected (vehi-
cles with VGRS)
The steering wheel may move from its
straight forward position, but this will be
corrected automatically when driving.
■
Sounds and vibrations caused by the
ABS, brake assist, VSC, TRAC, hill-start
assist control and VGRS systems
●
A sound may be heard from the engine
compartment when the brake pedal is
depressed repeatedly, when the engine is
started or just after the vehicle begins to
move. This sound does not indicate 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.
• Vibrations may be felt through the vehicle
body and steering.
• A motor sound may be heard also after
the vehicle comes to a stop.
• Vehicles without Lexus Safety System +
A: The brake pedal may pulsate slightly
after the ABS is activated.
• Vehicles without Lexus Safety System +
A: The brake pedal may move down
slightly after the ABS is activated.
■
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 engine.
■
EPS, VGRS and DRS operation sound
When the steering wheel is operated, a
motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
■
Automatic reactivation of TRAC and
VSC systems
After turning the TRAC and VSC systems
off, the systems will be automatically
re-enabled in the following situations:
●
When the engine 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.
■
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 engine off. The EPS system should
return to normal within 10 minutes.
■
Secondary Collision Brake operating
conditions
The vehicle speed is approximately 6 mph
298
4-5. Using the driving support systems
LS500_OM_(U)_1809
(10 km/h) or more and the airbag sensor
detects a collision. (The Secondary Colli-
sion Brake will not operate when the vehicle
speed is below approximately 6 mph [10
km/h].)
■
Secondary Collision Brake automatic
cancellation
The Secondary Collision Brake is automati-
cally canceled in 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
■
When “Check VGRS System” or
“CHECK DRS” is displayed on the
multi-information display
The VGRS or DRS may not operate prop-
erly. Have the vehicle inspected by your
Lexus dealer.
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.
■
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.
■
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/VSC is activated
(vehicles without Lexus Safety Sys-
tem + A)
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/ABS/VSC is acti-
vated (vehicles with Lexus Safety Sys-
tem + A)
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 systems are
turned off
Be especially careful and drive at a speed
appropriate to the road conditions. As
these are the systems to help ensure
vehicle stability and driving force, do not
turn the TRAC/VSC systems off unless
necessary.
299
4-5. Using the driving support systems
LS500_OM_(U)_1809
4
Driving
WARNING
■
Secondary Collision Brake
Do not overly rely on the Secondary Col-
lision 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.
■
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 and VSC systems will
not function correctly 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.
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