2018 LEXUS LS500 engine

2414-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ●
Roundabout exit road speed signs may
be detected and displayed (if positioned
in sight of the camera sensor) while trav-
eling on a roundabout.■
Speed limit sign display
If the engine switch wa s last turned off while
a speed limit sign wa s displayed on the
multi-information display, the same sign dis-
plays again when the engine switch is
turned to IGNITION ON mode. ■
Customization
Some functions can be customized.
( → P.468)
■
Meter display
Display
Set speed
IndicatorsDynamic radar cruise con-
trol with full-speed range In vehicle-to-vehicle distance con-
trol mode, the ve hicle automati-
cally accelerates, decelerates and
stops to match the speed changes
of the preceding vehicle even if the
accelerator pedal is not depressed.
In constant speed control mode,
the vehicle runs at a fixed speed.
Use the dynamic radar cruise con-
trol with full-speed range on free-
ways and highways.
 Vehicle-to-vehicle distance con-
trol mode ( → P.244)
 Constant speed control mode
( → P.248)
System Components
A
B
C

246 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) increased or decreased as follows: 
For the U.S. mainland, Hawaii Fine adjustment: By 1 mph (1.6 km/h) *1
or 1
km/h (0.6mph) *2
each time the switch is
pressed
Large adjustment: Increases or decreases
in 1mph (1.6 km/h) *1
or 1 km/h (0.6 mph) *2

increments for as long as the switch is held 
For Canada, Guam and Puerto Rico Fine adjustment: By 1 mph (1.6 km/h) *1
or 1
km/h (0.6mph) *2
each time the switch is
pressed
Large adjustment: Increases or decreases
in 5 mph (8 km/h) *1
or 5 km/h (3.1 mph) *2

increments for as long as the switch is held
In the constant speed control mode
( → P.248), the set speed will be
increased or decreased as follows: Fine adjustment: By 1 mph (1.6 km/h) *1
or 1
km/h (0.6 mph) *2
each time the switch is
pressed
Large adjustment: The speed will continue
to change while the switch is held. *1
: When the set speed is shown in “MPH” *2
: When the set speed is shown in “km/h”
Pressing the switch changes the vehi-
cle-to-vehicle distance as follows: 1 Long
2 Medium
3 Short The vehicle-to-vehicle distance is set auto-
matically to long mode when the engine
switch is turned to IGNITION ON mode.
If a vehicle is running ahead of you, the pre-
ceding vehicle mark will also be dis-
played.
Select a distance from the table below.
Note that the distances shown corre-
spond to a vehicle speed of 50 mph
(80 km/h). Vehicle-to-vehicle distance
increases/decreases in accordance
with vehicle speed. When the vehicle is
stopped by system control, the vehicle
stops at a certain vehicle-to-vehicle
distance depending on the situation.Changing the vehicle-to-vehicle
distance (vehicle-to-vehicle dis-
tance control mode) Vehicle-to-vehicle distance set-
tings (vehicle-to-vehicle dis-
tance control mode)
Distance
options Vehicle-to-vehicle dis-
tance
Long Approximately 160 ft. (50
m) A

2574-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ■
Adjusting the buzzer volume
The buzzer volume can be adjusted on
the multi-information display. The vol-
ume of buzzers for the intuitive parking
assist, RCTA function and RCD func-
tion will be adjusted simultaneously.
Use the meter control switches to
change settings. ( → P.77)
1 Press or to select .
2 Press or to select “PKSA”
and then press .
3 Press or to select and
then press .Each time the switch is pressed, the volume
level will change between 1, 2, and 3. ■
Muting a buzzer
A mute button will be displayed on the
multi-information display when an
object or pedestrian is detected. To
mute the buzzer, press .
The buzzers for the intuitive parking
assist, RCTA function and RCD func-
tion will be muted simultaneously.
Mute will be canceled automatically in
the following situations:
 When the shift position is changed.
 When the operating function is tem-
porarily canceled.
 When the operating function is dis-
abled manually.
 When the engine switch is turned
off. *
: If equipped
■
Types of sensors
Front corner sensors
Front center sensors
Rear corner sensors
Rear center sensors ■
Display
When the sensors detect an object,
such as a wall, a graphic is shown on
the multi-information display, head-up
display (if equipped) and Center Dis-
play depending on the position and dis-
tance to the object.
 Multi-information display and Setting the buzzer volume Intuitive parking assist *
The distance from your vehicle to
objects, such as a wall, when paral-
lel parking or maneuvering into a
garage is measured by the sensors
and communicated via the
multi-information display, head-up
display (if equipped), Center Dis-
play and a buzzer. Always check the
surrounding area when using this
system.
System components
A
B
C
D

2594-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving disabled, select on the multi-infor-
mation display, select and then On.
If disabled using this method, the sys-
tem will not be re-enabled by turning
the engine switch off and then to IGNI-
TION ON mode.
■
The system can be operated when
●
The engine switch is in IGNITION ON
mode.
●
Intuitive parking assist function is on.
●
The vehicle speed is less than about 6
mph (10 km/h).WARNING■
When using the intuitive parking
assist
Observe the following precautions.
Failing to do so may result in the vehicle
being unable to be driven safely and pos-
sibly cause an accident. ●
Do not use the sensor at speeds in
excess of 6 mph (10 km/h).●
The sensors’ detection areas and reac-
tion times are limited. When moving
forward or reversing, check the areas
surrounding the vehicle (especially the
sides of the vehicle) for safety, and
drive slowly, using the brake to control
the vehicle’s speed.●
Do not install accessories within the
sensors’ detection areas.●
The area directly under the bumpers is
not detected.
■
When to disable the function
In the following situations, disable the
function as it may operate even though
there is no possibility of a collision. ●
The vehicle is equipped with a fender
pole or wireless antenna.
●
The front or rear bu mper or a sensor
receives a strong impact.
●
A non-genuine Lexus suspension
(lowered suspension, etc.) is installed.
●
Towing eyelets are installed.
●
A backlit licence pl ate is installed. ■
When using intuitive parking assist
In the following situations, the system
may not function correctly due to a sen-
sor malfunction, etc. Have the vehicle
checked by your Lexus dealer. ●
The intuitive parking assist operation
display flashes or shows continuously,
and a buzzer sounds when no objects
are detected. ●
If the area around a sensor collides
with something, or is subjected to
strong impact. ●
If the bumper or grille collides with
something. ●
If the display flashes or is displayed
continuously and a buzzer does not
sound, except when the mute function
has been turned on. ●
If a display error oc curs, first check the
sensor.
If the error occurs even when there is
no ice, snow or mud on the sensor, it is
likely that the sensor is malfunctioning.■
Notes when washing the vehicle
Do not apply intensive bursts of water or
steam to the sensor area.
Doing so may result in the sensor mal-
functioning.
●
When using a high pressure washer to
wash the vehicle, do not spray the sen-
sors directly, as doing so may cause a
sensor to malfunction.
●
When using steam to clean the vehicle,
do not direct steam too close to the
sensors as doing so may cause a sen-
sor to malfunction.

260 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) ●
A shift position other than P is selected.■
Setting the buzzer volume
The buzzer volume can be adjusted on the
multi-information display. ( → P.257)■
If “Parking Assist Unavailable Clean
Parking Assist Sensor” is displayed on
the multi-inform ation display
A sensor may be covered with ice, snow,
dirt, etc. Remove the ice, snow, dirt, etc.,
from the sensor to return the system to nor-
mal.
Also, due to ice forming on a sensor at low
temperatures, a warning message may be
displayed or the sensor may not be able to
detect an object. Once the ice melts, the
system will return to normal. ■
Sensor detectio n information●
The following situations may occur
during use.
• Depending on the shape of the object
and other factors, the detection distance
may shorten, or detection may be impos-
sible.
• There will be a short delay between
object detection and display. Even at low
speeds, there is a possibility that the
object will come within the sensor’s
detection areas before the display is
shown and the warning beep sounds.
• It might be difficult to hear the buzzer due
to the volume of the audio system or air
flow noise of the air conditioning system.■
Conditions under which the function
may not function correctly
Certain vehicle conditions and the sur-
rounding environment may affect the ability
of a sensor to correctly detect objects. Par-
ticular instances where this may occur are
listed below.
●
There is dirt, snow or ice on a sensor.
(Cleaning the sensors will resolve this
problem.)
●
A sensor is frozen. (Thawing the area will
resolve this problem.)
In especially cold weather, if a sensor is
frozen the sensor display may be dis-
played abnormally, or objects, such as a
wall, may not be detected.
●
A sensor is covered in any way. ●
When a sensor or the area around a sen-
sor is extremely hot or cold. ●
On an extremely bumpy road, on an
incline, on gravel, or on grass. ●
The vicinity of the vehicle is noisy due to
vehicle horns, motorcycle engines, air
brakes of large vehicles, or other loud
noises producing ultrasonic waves. ●
There is another vehicle equipped with
parking assist sensors in the vicinity. ●
A sensor is coated with a sheet of spray
or heavy rain. ●
If a sensor is hit by a large amount of
water, such as when driving on a flooded
road. ●
If the vehicle is significantly tilted. ●
The vehicle is approaching a tall or
curved curb. ●
If objects draw too close to the sensor. ■
Objects which may not be properly
detected
The shape of the object may prevent the
sensor from detectin g it. Pay particular
attention to the following objects: ●
Wires, fences, ropes, etc. ●
Cotton, snow and other materials that
absorb sound waves ●
Sharply-angled objects ●
Low objects ●
Tall objects with upper sections project-
ing outwards in the direction of your vehi-
cle
People may not be de tected if they are
wearing certain types of clothing.

264 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) *
:If equipped
Meter control switchesTurning the RCTA function on/off.
When the RCTA function is disabled, the
RCTA OFF indicator illuminates.
Outside rear view mirror indicatorsWhen a vehicle approaching from the right
or left at the rear of the vehicle is detected,
both outside rear view mirror indicators
will flash.
Center Display If a vehicle approaching from the right or
left at the rear of th e vehicle is detected,
the RCTA icon ( → P.265) for the detected
side will be displayed on the Center Dis-
play. This illustration shows an example of a
vehicle approaching from both sides of the
vehicle.
RCTA buzzer If a vehicle approaching from the right or
left at the rear of th e vehicle is detected, a
buzzer will sound. The buzzer also sounds
for approximately 1 second immediately
after the RCTA function is turned on.
Use the meter control switches to
enable/disable the RCTA function.
( → P.77)
1 Press or to select .
2 Press or to select “PKSA”
and then press .
3 Press or to select “RCTA”
and then press . When the RCTA function is disabled, the
RCTA OFF indicator ( → P.64) illuminates
on the multi-informat ion display. (Each
time the engine switch is turned off then
changed to IGNITION ON mode, the
RCTA function will be enabled automati-
cally.)RCTA (Rear cross traffic
alert) function *
The RCTA function uses the BSM
rear side radar sensors installed
behind the rear bumper. This func-
tion is intended to assist the driver
in checking areas that are not easily
visible when backing up.
System components
A
B
C Turning the RCTA function
on/off D

266 4-5. Using the driving support systems
LS500_OM_OM50F54U_(U) itor) (if equipped): Vehicles are
approaching from both sides of the
vehicle ■
RCTA function detection areas
The areas that vehicles can be detected in are outlined below.
The buzzer can alert the driver of
faster vehicles approaching from far-
ther away.
Example:
■
The RCTA function is operational when
The RCTA function operates when all of the
following conditions are met:
●
The engine switch is in IGNITION ON
mode.
●
The RCTA function is on.
●
The shift position is in R.
●
The vehicle speed is less than approxi- mately 5 mph (8 km/h). ●
The approaching vehicle speed is
between approximately 5 mph (8 km/h)
and 18 mph (28 km/h). ■
Setting the buzzer volume
The buzzer volume can be adjusted on the
multi-information display. ( → P.257)■
Conditions under which the RCTA func-
tion will not detect a vehicle
The RCTA function is not designed to
detect the following types of vehicles and/or
objects:
●
Vehicles approaching from directly
behind
●
Vehicles backing up in a parking space
next to your vehicle
●
Vehicles that the sensors cannot detect
due to obstructionsApproaching vehi-
cle speed Approximate
alert distance
18 mph (28 km/h)
(fast) 65 ft. (20 m)
5 mph (8 km/h)
(slow) 18 ft. (5.5 m) A

2674-5. Using the driving support systems
LS500_OM_OM50F54U_(U) 4
Driving ●
Guardrails, walls, signs, parked vehicles
and similar stationary objects●
Small motorcycles, bicycles, pedestrians,
etc.●
Vehicles moving away from your vehicle●
Vehicles approaching from the parking
spaces next to your vehicle■
Conditions under which the RCTA func-
tion may not function correctly●
The RCTA function may not detect vehi-
cles correctly in the following situations:
• When a sensor is misaligned due to a
strong impact to the sensor or its sur-
rounding area
• When mud, snow, ice, a sticker, etc. is
covering a sensor or its surrounding area
on the rear bumper
• When driving on a road surface that is
wet with standing water during bad
weather, such as heavy rain, snow, or fog
• 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
• When a towing eyelet is installed to the
rear of the vehicle.
• When backing up on a slope with a sharp
change in grade • When backing out of a shallow angle
parking spot
• Immediately after the RCTA function is
turned on
• Immediately after the engine is started
with the RCTA function on
• When the sensors cannot detect a vehi-
cle due to obstructions
●
Instances of the RCTA function unneces-
sarily detecting a vehicle and/or object
may increase in the following situations:
• When a vehicle passes by the side of your
vehicle
• When the parking space faces a street
and vehicles are being driven on the
street