2018 LEXUS LS500 wheel

240 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) *
: Displayed when speed limit information for th e road is available from the navigation sys-
tem
In the following situations, the RSA sys-
tem will alert the driver.
 When the vehicle speed exceeds
the speed warning threshold of the
speed limit sign displayed, the sign
display will be emphasized and a
buzzer will sound.
 When the RSA system recognizes a
do not enter sign and determines
that your vehicle has entered a
no-entry area, the displayed sign will
flash and a buzzer will sound.
Depending on the situation, traffic
environment (traffic direction, speed,
unit) may be detected incorrectly and a
warning display may not operate prop-
erly. ■
Turning the system on/off
1 Select on of the
multi-information display ( → P.76)
2 Press on the steering wheel.
■
Automatic turn-off of RSA sign display
In the following situations, a displayed
speed limit sign will stop being displayed
automatically:
●
A new sign is not recognized for a certain
distance. (When speed limit information
is not available from the navigation sys-
tem)
In the following situations, do not enter, stop
and yield signs will st op being displayed
automatically:
●
The system determines that your vehicle
has passed the sign.
●
The road changes due to a left or right turn, etc. ■
Conditions in which the function may
not operate or detect correctly
In the following situations, RSA does not
operate normally and may not recognize
signs, display the incorrect sign, etc. How-
ever, this does not indicate a malfunction. ●
The camera sensor is misaligned due to a
strong impact being applied to the sen-
sor, etc. ●
Dirt, snow, stickers, etc. are on the wind-
shield near the camera sensor. ●
In inclement weather such as heavy rain,
fog, snow or sand storms ●
Light from an oncoming vehicle, the sun,
etc. enters the camera sensor. ●
The sign is dirty, faded, tilted or bent. ●
All or part of the sign is hidden by the
leaves of a tree, a pole, etc. ●
The sign is only visible to the camera sen-
sor for a short amount of time. ●
The driving scene (turning, lane change,
etc.) is judged incorrectly. ●
Even if it is a sign not appropriate for the
currently traveled lane, such a sign exists
directly after a freeway branches, or in an
adjacent lane just before merging. ●
Stickers are attached to the rear of the
preceding vehicle. ●
A sign resembling a system compatible
sign is recognized. ●
The front of the vehicle is raised or low-
ered due to the carried load.
●
The surrounding brightness is not suffi-
cient or changes suddenly.
●
When a sign intended for trucks, etc. is
recognized.
●
The navigation system map data is old.
●
The navigation system is not operating.
●
Side road speed signs may be detected
and displayed (if positioned in sight of the
camera sensor) while the vehicle is trav-
eling on the main road.Warning indication

250 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) ■
Warning messages and buzzers for
dynamic radar cruise control with
full-speed range
Warning messages and buzzers are used to
indicate a system malfunction or to inform
the driver of the need for caution while driv-
ing. If a warning message is shown on the
multi-information display, read the message
and follow the instructions. ■
When the sensor may not be correctly
detecting the vehicle ahead
In the case of the following and depending
on the conditions, operate the brake pedal
when deceleration of the system is insuffi-
cient or operate the accelerator pedal
when acceleration is required.
As the sensor may not be able to correctly
detect these types of vehicles, the approach
warning ( → P.247) may not be activated.●
Vehicles that cut in suddenly●
Vehicles traveling at low speeds●
Vehicles that are not moving in the same
lane●
Vehicles with small rear ends (trailers
with no load on board, etc.)
●
Motorcycles travelin g in the same lane●
When water or snow thrown up by the
surrounding vehicles hinders the detect-
ing of the sensor
●
When your vehicle is pointing upwards
(caused by a heavy load in the luggage
compartment, etc.) ●
Preceding vehicle has an extremely high
ground clearance
■
Conditions under which the vehi-
cle-to-vehicle dist ance control mode
may not function correctly
In the case of the following conditions,
operate the brake pedal (or accelerator
pedal, depending on the situation) as nec-
essary.
As the sensor may not be able to correctly
detect vehicles ahead, the system may not
operate properly. ●
When driving around a curve, on a nar-
row road, or on a bridge, in a tunnel, etc.,
where there are objects on the roadside
●
When steering wheel operation or your
position in the lane is unstable
●
When the vehicle ahead of you deceler-
ates suddenly
●
While the vehicle speed is decreasing to
the set speed after the vehicle acceler-
ates by depressing the accelerator pedal.

2694-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving 2 Press or to select “PKSA”
and then press .
3 Press or to select “RCD”
and then press .When the RCD function is disabled, the
RCD OFF icon ( → P.64) illuminates on the
multi-information display.
If the rear camera detection function
detects a pedestrian in the detection
area, the buzzer and pedestrian detec-
tion will operate as follows:
If a pedestrian is detected in area
Buzzer: Sounds repeatedly
Pedestrian detection icon: Blinks 3
times and then stays on
If a pedestrian is detected in area
Buzzer (When the vehicle is sta-
tionary): Sounds 3 times
Buzzer (When the vehicle is back-
ing up, when a pedestrian
approaches the rear of the vehicle): Sounds repeatedly
Pedestrian detection icon: Blinks 3
times and then stays on
If the system determines that your
vehicle may collide with a pedes-
trian in area
Buzzer: Sounds repeatedly
Pedestrian detection icon: Blinks 3
times and then stays on ■
The rear camera dete ction function is
operational when ●
The engine switch is in IGNITION ON
mode. ●
RCD function is on. ●
The shift position is in R. ■
Setting the buzzer volume
The buzzer volume can be adjusted on the
multi-information display. ( → P.257)■
If “Rear Camera Detection Unavailable
Remove the Dirt of Rear Camera” is dis-
played on the multi-information display
A rear camera lens ma y be dirty or covered
with snow or ice. In such cases, if it is
removed from the rear camera lens, the sys-
tem should return to normal. (It may be nec-
essary to drive the vehicle for some time
before the system returns to normal.) ■
If “Rear Camera Detection Unavail-
able” is displayed on the multi-informa-
tion display ●
If this message is di splayed after the bat-
tery has been disconnected and recon-
nected, fully turn the steering wheel to
the left and then the right on level ground.
●
If this message is di splayed only when the
R shift position is selected, the rear cam-
era lens may be dirty. Clean the rear
camera lens.
■
Situations in which the system may not
operate properly
●
Some pedestrians, such as the following,
may not be detected by the rear camera
detection function, preventing the func-
tion from operating properly:When a pedestrian is detected
A
A
B
B C
C

276 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) Additionally, for vehicles with the Parking
Support Brake function, turn the steering
wheel fully to the left and right with the vehi-
cle stopped.

2914-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
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, setti ngs of the follow-
ing functions can be changed:
 Access mode control
 Parking height control
 Vehicle height control WARNING■
Situations in whic h the operation of
the electronically modulated air sus-
pension should be canceled
In the following situations, make sure to
disable all functions of the vehicle height
control of the electronically modulated
air suspension and then stopping the
engine. Otherwise, the vehicle height
may change and part of your body may
be caught under the vehicle, possibly
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

294 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) ■
ECB (Electronically Controlled
Brake System) (if equipped)
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 sudden ly or turning on
slippery road surfaces. ■
Secondary Collision Brake
When the airbag sensor detects a colli-
sion, the brakes and brake lights are
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.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

2954-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ■
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 stabilit y, and helps good
vehicle posture.
Also, the damping force changes
depending on the selected driving
mode. ( → P.289)■
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 ■
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 Co ntrol Turned Off” will be
shown on the multi-information display.
Press the switch ag ain to turn the sys-
tem back on.

296 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) ■
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 Cont rol Turned Off” will
be shown on the mult i-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.210, 217)■
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
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 operat ing 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 Sys-
tem+A: The brake pedal may pulsate
slightly after the ABS is activated.