2021 LEXUS RCF warning

1954-5. Using the driving support systems
4
Driving
●When starting off on a road surface that
is wet with rain, standing water, etc.
●When starting off on a slick road surface.
●When the vehicle has not been properly
maintained (tires are worn out, tire pres-
sure is low, etc.).
*: If equipped
Multi-information display ( P.73)
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
■Operating conditions
●The engine switch is in IGNITION ON
mode.
●The trunk is closed.
WARNING
■Launch control precautions
Observe the following precautions.
Failure to do so may result in death or
serious injury.
●Do not use on public roads.
●Use only when road and ambient con-
ditions are safe.
●Before use, ensure that no people or
obstructions are nearby.
●Proper use of launch control requires
an expert level of driving skill. When
using launch control, always check the
track conditions and surrounding area.
●Do not start off with the rear wheels
spinning.
NOTICE
■To avoid damage to the vehicle when
using launch control
●As launch control applies a large load
on vehicle components, do not use it
excessively.
●Always follow the correct operation
procedures as described in this man-
ual.
●Only use launch control on dry, paved
roads, as slippery or loose road sur-
faces may cause damage to the vehi-
cle.
●When using launch control repeatedly,
wait approximately 10 minutes
between each use.
Active rear wing*
The RC F is equipped with an active
rear wing that operates automati-
cally while the ve hicle 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 using a switch.
System components
A
B
C

1964-5. Using the driving support systems
●The active rear wing has been activated
in a customized setting.
■Conditions which stop the operation
In the following situations operation of the
active rear wing will stop:
●The engine switch is turned 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 16 mph (25 km/h).
■When there is a malfunction in the sys-
tem
A warning message will be displayed on the
multi-information display. ( P.311)
■Customization
Some functions can be customized.
(  P.360)
The active rear wing will operate auto- matically at the following speeds
according to the selected driving
mode (
P.192). (Always observe the
legal speed limit when driving on pub-
lic roads.)
 When other than Eco drive mode is
selected
Up: Approximately 50 mph (80 km/h)
Down: Approximately 25 mph (40 km/h)
When Eco drive mode is selected
Up: Approximately 80 mph (130 km/h)
Down: Approximately 25 mph (40 km/h)
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.)
■Operation by switch
*: Press and hold the sw itch 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-
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.
Automatic operation
Manual operation
Vehicle speedUp/Down
0 mph (0 km/h)
(vehicle stopped)Press/Press and
hold
*
Approximately 0 – 12 mph (0 – 20 km/h)Operation not pos- sible
Approximately 12 – 80 mph (20 – 130 km/h)
Press/Press
Approximately 80
mph (130 km/h) or moreOperation not pos- sible

1974-5. Using the driving support systems
4
Driving
matically.
■Manual operation
Even if the active rear wing is changed to
manual operation using the active rear wing
switch, the setting will not be maintained.
Automatic operation will resume if the
engine switch is turn ed off or at certain
vehicle speeds.
*: If equipped
Pressing the “TVD” switch changes the
TVD control mode.
The current TVD control mode will be dis-
played on the meters.
1 STANDARD mode
This is the default mo de and provides an
optimum balance of driving agility and sta-
bility.
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.
NOTICE
■To prevent battery discharge
Do not operate the active rear wing
repeatedly while the engine is turned off.
TVD (Torque Vectoring Dif-
ferential)*
The TVD system distributes driving
force (torque) between the right
and left rear wheels automatically.
This system contributes to
enhanced steering response while
cornering and increased traction
when exiting a corner, providing an
agile driving experience.
Changing TVD control modes

1984-5. Using the driving support systems
2SLALOM mode
This mode emphasizes enhanced steering
response.
3TRACK mode
This mode emphasizes stability for high
speed sporty driving.
■Operating conditions
The engine switch is in IGNITION ON
mode.
■Automatic cancelation of the selected
TVD control mode
SLALOM and TRACK mode are canceled
when the engine switch is turned off. When
the engine switch is turned to IGNITION
ON mode, the TVD system will be in
STANDARD mode.
■Automatic disabling of the TVD system
If a malfunction is detected in the TVD sys-
tem, a warning message will be displayed
on the multi-information display ( P.311)
and the TVD system will be disabled auto-
matically. If the system is disabled, driving
force will not be distributed by the TVD but
through normal differential operation.
■To protect the system
The TVD fluid temperature may become
excessively high when driving for a long
time under extremely high load conditions.
In this case, a warnin g message will be dis-
played on the multi-information display.
(  P.311)
The multi-information display shows the distribution of driving force
between the right and left rear wheels.
(
P.73)
WARNING
■Cautions regarding the use of the sys-
tem
The driver is solely responsible for safe
driving. Do not overly rely on the TVD
system. Always drive safely, taking care
to observe your surroundings.
TVD control status on the
multi-information display

2004-5. Using the driving support systems
■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 “TRAC OFF” indicator light will come
on.
Press the switch again to turn the sys-
tem back on.
■Turning off both TRAC and VSC sys-
tems
To turn the TRAC and VSC systems off,
press and hold the switch for more
than 3 seconds.
The “TRAC OFF” indicator light and the
VSC OFF indicator light will come on.
*
Press the switch ag ain to turn the sys-
tems back on.
*: On vehicles with PCS (Pre-Collision System), pre-collision brake assist and
precollision braking will also be disabled.
The pre-collision system warning light
will come on and a message will be dis-
played on the multi- information display.
(  P.163)
■Expert mode
When expert mode is selected, it is possible
to drive in a more sporty manner than other
drive modes. Expert mode disables the
TRAC and VSC systems but the engine and
brakes may be controlled depending on the
vehicle behavior.
To select expert mode, press the
switch when in SPORT S+ mode.
The “EXPERT” indicator will come on
together with the TRAC OFF and VSC
OFF indicators.
To cancel expert mode, press the
switch or use the driving mode select switch
to select a driving mode other than SPORT
S+ mode.
■When the “TRAC OFF” indicator light
comes on even if the switch has not
been pressed
TRAC is temporary deactivated. If the indi-

2014-5. Using the driving support systems
4
Driving
cator light continues to remain on, 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 lever is in a position other than P
or N (when starting off forward/back-
ward 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 lever is moved to P or N.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse after
the brake pedal is released.
■Sounds and vibrations caused by the
ABS, brake assist, VSC, TRAC and
hill-start assist control 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.
• The brake pedal may pulsate slightly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■EPS operation sound
When the steering wheel is operated, a
motor sound (whirring sound) may be
heard. This does not indicate a malfunction.
■Reactivation of the TRAC/VSC systems
Even after the TRAC /VSC systems have
been turned off, turning the engine off and
then on again will automatically reactivate
the TRAC/VSC systems.
■Reactivation of the TRAC system linked
to vehicle speed
When only the TRAC system is turned off,
the TRAC system will turn on when vehicle
speed increases. Ho wever, when both
TRAC/VSC systems are turned off, the sys-
tems will not turn on even 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, re frain from excessive
steering input or stop the vehicle and turn
the engine off. The EPS system should
return to normal within 10 minutes.
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 di stance. 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 over bumps in the road

2024-5. Using the driving support systems
●When driving over roads with potholes
or uneven surfaces
■TRAC may not operate effectively
when
Directional control and power may not
be achievable while driving on slippery
road surfaces, even if the TRAC 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
The slip indicator light flashes. Always
drive carefully. Re ckless 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 system s to help ensure
vehicle stability and driving force, do not
turn the TRAC/VSC systems off unless
necessary.
■Expert mode precautions
●Do not use on public roads.
●Use only when the road conditions and
safety of the surrounding area can be
ensured.
WARNING
●Proper use of expert mode requires a
professional level of driving skill. When
using expert mode, always check the
road conditions and surrounding area
and drive more carefully than usual.
■Replacing tires
Make sure that all ti res 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 suspensi on will affect the
driving assist systems, and may cause a
system to malfunction.

2034-6. Driving tips
4
Driving
4-6.Driving tips
Use fluids that are appropriate to
the prevailing outside temperatures.
•Engine oil
• Engine coolant
•Washer fluid
Have a service technician inspect
the condition of the battery.
 Have the vehicle fitted with four
snow tires.
Ensure that all tires are the specified size
and the same brand.
Perform the following according to the
driving conditions:
Do not try to forcibly open a window
or move a wiper that is frozen. Pour
warm water over the frozen area to
melt the ice. Wipe away the water
immediately to prevent it from
freezing.
 To ensure proper operation of the
climate control system fan, remove
any snow that has accumulated on
the air inlet vents in front of the
windshield.
 Check for and remove any excess
ice or snow that may have accumu-
lated on the exterior lights, vehicle’s
roof, chassis, around the tires or on
the brakes.
 Remove any snow or mud from the
bottom of your shoes before getting
in the vehicle.
Accelerate the vehicle slowly, keep a
safe distance between you and the
vehicle ahead, and drive at a reduced
speed suitable to road conditions.
Winter driving tips
Carry out the necessary prepara-
tions and inspections before driving
the vehicle in winter. Always drive
the vehicle in a manner appropriate
to the prevailing weather condi-
tions.
Preparation for winter
WARNING
■Driving with snow tires
Observe the following precautions to
reduce the risk of accidents.
Failure to do so may result in a loss of
vehicle control and cause death or seri-
ous injury.
●Use tires of the specified size.
●Maintain the recommended level of air
pressure.
●Do not drive in excess of 75 mph (120
km/h), regardless of the type of snow
tires being used.
●Use snow tires on all, not just some
wheels.
NOTICE
■Repairing or replacing snow tires
Request repairs or replacement of snow
tires from Lexus dealers or legitimate tire
retailers.
This is because the removal and attach-
ment of snow tires affects the operation
of the tire pressure warning valves and
transmitters.
Before driving the vehicle
When driving the vehicle