2018 LEXUS LS500H Owners Manual

2734-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving
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.274) 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.87)
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.72) illuminates
on the multi-informat ion display. (Each
time the power switch is turned off then
changed to ON mode, the RCTA function
will be enabled automatically.)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

274 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) ■
Outside rear view mirror indicator visi-
bility
In strong sunlight, the outside rear view mir- ror indicator may be difficult to see. ■
Hearing the RCTA buzzer
The RCTA buzzer may be difficult to hear
over loud noises, such as if the audio system
volume is high. ■
When “RCTA NOT AVAILABLE” is
shown on the multi-information display
Water, snow, mud, etc., may be attached to
the rear bumper around the sensors.
( → P.262) Removing the water, snow, mud,
etc., from the attached to the rear bumper
around the sensors to normal.
Additionally, the function may not function
normally when used in extremely hot or
cold environments. ■
Rear side radar sensors
→ P.262
■
Operation of the RCTA function
The RCTA function uses rear side radar sensors to detect vehicles approaching
from the right or left at the rear of the ve hicle and alerts the driver of the presence
of such vehicles by flashing the outside rear view mirror indi cators and sounding a
buzzer.
Approaching vehicles
Detection areas of approaching vehicles ■
RCTA icon display
When a vehicle approaching from the
right or left at the rear of the vehicle is detected, the following will be dis-
played on the Center Display.
 Example (Lexus parking assist mon-WARNING■
Cautions regarding the use of the
function
The driver is solely responsible for safe
driving. Always driv e safely, taking care
to observe your surroundings.
The RCTA function is only a supplemen-
tary function which alerts the driver that a
vehicle is approaching from the right or
left at the rear of the vehicle. As the
RCTA function may not function cor-
rectly under certain conditions, the
driver’s own visual confirmation of safety
is necessary. Over reli ance on this func-
tion may lead to an accident resulting
death or serious injury.
RCTA function
A
B

2754-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving 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 power switch is in 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.266)■
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

276 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) ●
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 hybrid system 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

2774-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving • 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 a towing eyelet is installed to the
rear of the vehicle *
: If equipped
Pedestrian detection icon Displayed automatically when a pedestrian
is detected.
RCD OFF icon When the RCD function is disabled, the
RCD OFF icon illuminates. (Each time the
power switch is turned off then changed to
ON mode, the RCD function will be
enabled automatically.)
Use the meter control switches to
enable/disable the RCD function.
( → P.87)
1 Press or to select .RCD (Rear Camera Detec-
tion) function *
When the vehicle is backing up, the
rear camera detection function can
detect pedestrians in the detection
area behind the vehicle. If a pedes-
trian is detected, a buzzer will
sound and an icon will be displayed
on the Center Display to inform the
driver of the pedestrian.
Center Display
Turning the RCD function on/off A
B

278 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 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.72) 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 power switch is in 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.266)■
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 displayed after the
12-volt battery has been disconnected
and reconnected, 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

2794-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) 4
Driving • Pedestrians who are bending forward or
squatting
• Pedestrians who are lying down
• Pedestrians who are running
• Pedestrians who suddenly enter the
detection area
• Pedestrians 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
rear camera detection function, prevent-
ing 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 rear camera detection func-
tion 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 rear camera detection function may
operate even though there are no pedes-
trians in the detection area.
• When backing up toward the roadside or
a bump on the road
• If the vehicle is signif icantly 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 othe r 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 due to a collision or other
impact, or removal and installation
• If a towing eyelet is in stalled 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 at tached) or scratched
• If there is a flashing light in the detection
area, such as the emergency flashers of
another vehicle ●
Situations in which the rear camera
detection function may be difficult to
notice
• If buzzer may be difficult to hear if the
surrounding area is noisy, the volume of
the audio system volume is high, the air
conditioning system is being used, etc.
• If the temperature in the cabin is
extremely high or low, the audio system
screen may not operate correctly.

280 4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U) *
:If equipped
■
Parking Support Brake function
(static objects) (if equipped)
Ultrasonic sensors are used to detect
static objects, such as a wall, in the
detection area when driving at a low
speed or backing up. ( → P.286)■
Parking Support Brake function
(rear-crossing vehicles)(if
equipped)
Rear radar sensors are used to detect
approaching vehicles in the detection
area behind the vehicle when backing
up. ( → P.291) ■
Parking Support Brake function
(rear pedestrians) (if equipped)
A rear camera sensor is used to detect
pedestrians in the detection area
behind the vehicle when backing up.
( → P.295)PKSB (Parking Support
Brake) *
The Parking Support Brake system
consists of the following functions
that operate when driving at a low
speed or backing up, such as when
parking. When the system deter-
mines that a collision with a
detected object or pedestrian is
high, a warning operates to urge
the driver to take evasive action. If
the system determines that the pos-
sibility of a collision with a detected
object or pedestrian is extremely
high, the brakes are automatically
applied to help avoid the collision or
help reduce the impact of the colli-
sion.
PKSB (Parking Support Brake)
system WARNING■
Limitations of the Parking Support
Brake system
Do not overly rely on the system, as
doing so may lead to an accident. ●
The driver is solely responsible for safe
driving. Always drive carefully, taking
care to observe your surroundings.
The Parking Support Brake system is
designed to provide support to lessen
the severity of collisions. However, it
may not operate in some situations. ●
The Parking Support Brake system is
not designed to stop the vehicle com-
pletely. Additionally, even if the system
has stopped the vehicl e, it is necessary
to depress the brake pedal immedi-
ately as brake control will be canceled
after approximately 2 seconds.
NOTICE■
If “Parking Support Brake Unavail-
able” is displayed on the multi-infor-
mation display and the PKSB OFF
indicator is flashing
If this message is displayed immediately
after the power switch is changed to ON
mode, operate the vehicle carefully, pay-
ing attention to your surroundings. It may
be necessary to drive the vehicle for a
certain amount of time before the system
returns to normal. (If the system is not
return to normal afte r driving for a while,
clean the rear camera lens.)