2018 Lexus LC500 lexus LC500 2018 Owner's Manual

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4-5. Using the driving support systems
Driving
■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 farther away.
Example:
■The RCTA function is operational when
The RCTA function operates when all of the
following conditions are met:
●The RCTA function is on.
●The shift position is in R.
●The vehicle speed is less than approxi- mately 8 km/h (5 mph).
●The approaching vehicle speed is between approximately 8 km/h (5 mph) and 28 km/h (18 mph).
DisplayContent
A vehicle is
approaching from
the left at the rear of
the vehicle
A vehicle is
approaching from
the right at the rear
of the vehicle
Vehicles are
approaching from
both sides of the
vehicle
The RCTA function
is malfunctioning
( P.249)
DisplayContent
Approaching vehi-
cle speed
Approximate
alert distance
28 km/h (18 mph)
(fast)20 m (65 ft.)
8 km/h (5 mph)
(slow)5.5 m (18 ft.)
A

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4-5. Using the driving support systems
■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 obstructions
●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*
*: Depending on the conditions, detection
of a vehicle and/or object may occur.
■Conditions under wh ich the RCTA func-
tion may not function correctly
●The RCTA function may not detect vehi-
cles correctly in the following situations: • When the 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 the sensor or 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 • When a vehicle is approaching at high speed
• 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

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4-5. Using the driving support systems
Driving
vehicle • When the parking space faces a street and vehicles are being driven on the
street
• 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
Multi-information display ( P.92)
Displays the status of the active rear wing
Active rear wing switch
Operates the active rear wing manually
Indicator
Illuminates when the active rear wing is
raised and turns off when it is retracted
WARNING
■Cautions regarding the use of the function
The driver is solely responsible for safe driving. Always drive 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 reliance on this func- tion may lead to an accident resulting death or serious injury.
Active rear wing*
The vehicle is equipped with an
active rear wing that operates auto-
matically while the vehicle is being
driven. This active rear wing
enhances aerodynamic perfor-
mance, especially at high speeds,
contributing to a more stable ride.
The active rear wing can be con-
trolled manually using a switch.
System components
A
B
C

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4-5. Using the driving support systems
■The active rear wing can be operated when
●The engine switch

is in IGNITION ON mode .
●The trunk is closed.
●The active rear wing has been activated
in a customized setting.
■Conditions which st op the operation
In the following situations operation of the
active rear wing will stop:
●The engine switch is
turned to ACCESSORY mode or off while the active rear wing is operating.
●The trunk is opened while the active rear wing is operating.
●The raising operation of the active rear wing is interrupted by an object, etc.
●The active rear wing is operated in an unusual manner causing it to stop at an irregular position.
In such cases, pressing the active rear wing switch will fully raise the active rear wing.
Or, begin driving the vehicle and the active rear wing will raise automatically when the vehicle speed reaches 25 km/h (16 mph).
■When there is a malfunction in the sys-
tem
A warning message will be displayed on the
multi-information display. ( P.378)
■Customization
The active rear wing can be turned on/ off.
(Customizable features: P.423)
The active rear wing will operate auto-
matically at the following speeds
according to the selected driving
mode ( P.242).
(Always observe the legal speed limit
when driving on public roads.)
 When other than Eco drive mode is
selected
Up: Approximately 80 km/h (50
mph)
Down: Approximately 40 km/h (25
mph)
 When Eco drive mode is selected
Up: Approximately 130 km/h (80
mph)
Down: Approximately 40 km/h (25
mph)
Operate the active rear wing switch to
raise/retract the active rear wing man-
ually.
The active rear wing retracts when it is
raised and raises when retracted.
However, the active rear wing does not
respond to switch operations while the
NOTICE
■To prevent system damage
●Do not apply pressure to the active rear wing when pushing or pulling the
vehicle.
●Do not lean on the active rear wing.
●Do not attach any accessories or other objects to the active rear wing.
●Do not modify or disassemble the active rear wing.
●Do not subject the active rear wing to
severe impact.
■To prevent 12-volt battery discharge
Do not operate the active rear wing
repeatedly while the engine is turned off.
Automatic operation
Changing to manual operation

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4-5. Using the driving support systems
Driving
active rear wing is operating.
*: Press and hold the switch until the indi-
cator turns off. If the switch is released
while the active rear wing is moving, it
will return to the raised position auto-
matically.
■Restoring automatic operation after the active rear wing is operated manually
If the active rear wing is operated manually, automatic operation will resume according to the vehicle speed.
Vehicle speedUp/Down
0 km/h (0 mph)
(vehicle stopped)
Press/Press and
hold*
Approximately 0 –
20 km/h (0 – 12
mph)
Operation not pos-
sible
Approximately 20 –
120 km/h (12 – 75
mph)
Press/Press
Approximately 120
km/h (75 mph) or
more
Operation not pos-
sible
WARNING
■When manually operating the active rear wing
Observe the following precautions before operating the active rear wing.
Failure to do so may result in death or serious injury.
●Ensure that the surrounding area is free of any objects that may come into
contact with or get caught on the active rear wing.
●If there are people near the active rear wing, make sure that there is no possi-
bility of their clothing, personal belongings or body parts getting caught. Children especially should be
warned not to touch the active rear wing while it is being operated.
●If there is a risk that an object may become caught on the active rear wing during operation, stop operation
immediately.

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4-5. Using the driving support systems
■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
■Secondary Collision Brake (if
equipped)
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.
■TRC (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 slightly 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
■AVS (Adaptive Variable Suspen-
sion System)
By independently controlling the
damping force of the shock absorbers
for each of the 4 wheels according to
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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4-5. Using the driving support systems
Driving
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. ( P.242)
■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, TRC, VSC, hill-start
assist control, EPS, VGRS (if
equipped) and DRS (if equipped) sys-
tems
Helps to maintain vehicle stability when
swerving on slippery road surfaces by
controlling the brakes, engine system> output, steering assist (if
equipped), and steering ratio (if
equipped)
■Emergency brake signal
When the brakes are applied suddenly,
the stop lights automatically flash to
alert the vehicle behind
■When the TRC/VSC/ABS systems are operating
The slip indicator light will flash while the TRC/VSC/ABS systems are operating.
■Disabling the TRC system
If the vehicle gets stuck in mud, dirt or snow,
the TRC system may reduce power from the engine to the wheels.
Pressing the switch to turn the sys-
tem off may make it easier for you to rock
the vehicle in order to free it.
To turn the TRC 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 TRC and VSC systems
To turn the TRC 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 multi-information display.*

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4-5. Using the driving support systems
Press the switch again to turn the sys-
tems back on.*: On vehicles with PCS (Pre-Collision Sys-
tem), 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.217)
■When the message is displayed on the multi-information display showing that
TRC has been disabled even if the
switch has not been pressed
TRC cannot be operated. Contact any
authorized Lexus retailer or Lexus autho- rized repairer, or any reliable repairer.
■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 starting 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:
●The shift position 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
■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 12-volt battery is discon-
nected (vehicles 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, TRC, VSC, 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 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 engine .