2017 LEXUS RC F automatic

3034-5. Using the driving support systems
4
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 sys-
tems.
●Any of the following conditions may occur when the above systems are operating.
None of these indicates that a malfunction has occurred.
• Vibrations may be felt through the vehicle body and steering.
• A motor sound may be heard afte r the vehicle comes to a stop.
• The brake pedal may pulsate slig htly after the ABS is activated.
• The brake pedal may move down slightly after the ABS is activated.
■EPS, VGRS and DRS operation sound
When the steering wheel is operated, a motor sound may be heard. This does not indi-
cate 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. However, wh en both TRAC/VSC systems are turned off, the systems
will not turn on even when vehicle speed increases.
■Reduced effectiveness of the EPS system
The effectiveness of the EPS system is reduced to prevent the system from overheating
when there is frequent steering input over an extended period of time. The steering
wheel may feel heavy as a result . Should this occur, refrain from excessive steering input
or stop the vehicle and turn the engine off. The EPS system should return to normal
within 10 minutes.
■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/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 lever is moved to P or N.
●The accelerator pedal is depressed.
●The parking brake is engaged.
●Approximately 2 seconds elapse af ter the brake pedal is released.

3064-5. Using the driving support systems
◆Pre-collision warning
When a high possibility of a frontal
collision is detected, the pre-colli-
sion system warning light flashes, a
buzzer sounds and a message is
shown on the multi-information dis-
play to urge the driver to take eva-
sive action.
◆Pre-collision brake assist
When there is a high possibility of a frontal collision, the system applies
greater braking force in relation to how strongly the brake pedal is depressed.
The system may not warn the driver us ing a warning light, warning display and
buzzer when the system detects and judges braking operations.
◆Pre-collision braking
When there is a high possibility of a frontal collision, the system warns the
driver using a warning light, warning display and buzzer. If the system deter-
mines that a collision is unavoidable, the brakes are automatically applied to
reduce the collision speed.
◆Suspension control (if equipped)
When the system determines that there is a high possibility of a frontal colli-
sion, the operation of Adaptive Variable Suspension System ( →P. 299) opti-
mally controls the damping force of the shock absorber.
PCS (Pre-Collision System)∗
∗
: If equipped
When the radar sensor detects the possibi lity of a frontal collision, brakes are
automatically engaged to lessen impact as well as vehicle damage.
The pre-collision system can be turned on and off as necessary by operating
the switch. ( →P. 307)

3094-5. Using the driving support systems
4
Driving
■Conditions that may trigger the system even if there is no danger of a collision
In any of the following situations where the frontal area of the radar sensor is inter-
rupted, the radar sensor may detect possibility of a frontal collision and the system
may be activated.
●When passing by an oncoming vehicle in a curve or a turn to the right or the left
●When rapidly approaching an obstacle ahead (e.g. preceding vehicle, toll gate barrier,
etc.)
●When there is a structural object (billboar d, low ceiling, fluorescent light, etc.) above
the uphill road ahead
●When driving on a narrow road or throug h under a low overhead structure (bridge,
tunnel, fly-under, etc.)
●When driving on an uneven road surface
●When there is a metal object, bump, or protrusion on the road surface
●When vehicle’s front part is raised or lowered depending on loading conditions
●When the direction of radar sensor is misa ligned by strong impact applied on an area
around the radar sensor, etc.
●When there is an obstacle (guard rail, etc.) by the roadside at the entrance to a curve
●When the front of your vehicle is pointing upwards (caused by putting a heavy load in
the trunk etc.)
When the system is activated in the situations described above, there is also a possibility
that the brakes may be applied wi th a force greater than normal.
■Obstacles not detected
The sensor cannot detect plastic obstacles such as traffic cones. There may also be occa-
sions when the sensor cannot de tect pedestrians, animals, bicycles, motorcycles, trees,
or snowdrifts.
■Situations in which the pre-collision system does not function properly
The system may not function effectively in situations such as the following:
●On roads with sharp bends or uneven surfaces
●If a vehicle suddenly moves in front of yo ur vehicle, such as at an intersection
●If a vehicle suddenly cuts in front of your vehicle, such as when overtaking
●In inclement weather such as heavy rain, fog, snow or sand storms
●If the vehicle is skidding when VSC is not operating
●When your vehicle is steeply inclined
●When only part of your vehicle’s front end collides with, or contacts, a vehicle or object
in a frontal collision
●When the radar sensor moves off position du e to its surrounding area being subjected
to a strong impact
●When an obstacle suddenly appears in front of the vehicle due to the steering wheel
being turned sharply or another cause
■Automatic cancelation of the pre-collision system
When a malfunction occurs due to sensor cont amination, etc. that results in the sensors
being unable to detect obstac les, the pre-collision system will be automatically disabled.
In this case, the system will not activate even if there is a collision possibility.

3124-5. Using the driving support systems
WARNING
■Cautions regarding the assist contents of the system
By means of alarms and brake control, the pre-collision system is intended to assist the
driver in avoiding collisions through the process of LOOK-JUDGE-ACT. There are
limits to the degree of assistance the system can provide, so please keep in mind the
following important points.
●Assisting the driver in watching the road
The pre-collision system is only able to detect obstacles directly in front of the vehicle,
and only within a limited range. It is not a mechanism that allows careless or inatten-
tive driving, and it is not a system that can assist the driver in low- visibility conditions. It
is still necessary for the driver to pay cl ose attention to the vehicle’s surroundings.
●Assisting the driver in making correct judgment
When attempting to estimate the possibility of a collis ion, the only data available to
the pre-collision system is that from obstacles it has detected directly in front of the
vehicle. Therefore, it is absolutely necessa ry for the driver to remain vigilant and to
determine whether or not there is a possib ility of collision in any given situation.
●Assisting the driver in taking action
The pre-collision brake assist function of th e pre-collision system is designed to help
reduce the severity of a collision, and will only operate when the system determines
that a collision is unavoidable. This system is not capable of automatically avoiding a
collision or bringing the vehicle to a stop safely without appropriate operations per-
formed by the driver. For this reason, when encountering a dangerous situation the
driver must take direct and immediate action in order to ensure the safety of all
involved.

3264-5. Using the driving support systems
The RC F is equipped with an active rear wing that operates automatically while
the vehicle is being driven. This active rear wing enhances aerodynamic perfor-
mance, especially at high speeds, co ntributing to a more stable ride.
The active rear wing can be controlled using a switch.
Multi-information display (→ P. 117)
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
The active rear wing will operate automatically at the following speeds according
to the selected driving mode (→ P. 294).
(Always observe the legal speed limit when driving on public roads.)
Active rear wing (RC F)
Features
1
2
3
Automatic operation
Driving modeUpDown
Normal
SportApproximately 50 mph (80 km/h)Approximately 25 mph (40 km/h)
Eco driveApproximately 80 mph (130 km/h)Approximately 25 mph (40 km/h)

3274-5. Using the driving support systems
4
Driving
Operate the active rear wing switch to raise/retract the active rear wing manu-
ally. (The active rear wing retracts when it is raised and raises when retracted.)
■Operation by switch
*: Press and hold the switch until the indicator tu rns off. If the switch is released while the
active rear wing is moving, it will retu rn to the raised position automatically.
■The active rear wing can be operated when
●The engine switch is in IGNITION ON mode.
●The trunk is closed.
■Conditions which stop the operation of the active rear wing
In the following situations operation of the active rear wing will stop:
●The engine switch is turned off whil e 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 unusua l manner causing it to stop at an irregular
position.
In such cases, pressing the acti ve 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 vehi-
cle speed reaches 16 mph (25 km/h).
■Restoring automatic operation after the ac tive rear wing is operated manually
If the active rear wing is operated manually, automatic operation will resume according
to the vehicle speed.
■When there is a malfunction in the system
A warning message will be displayed on the multi-information display. (→P. 583)
■Customization
The active rear wing can be held at the raised position or retracted position.
(Customizable features: →P. 673)
Manual operation
Vehicle speedUpDown
0 mph (0 km/h)
(vehicle stopped)PressPress and hold*
Approximately 0 – 12 mph (0 – 20 km/h)Operation not possibleOperation not possible
Approximately 12 – 80 mph (20 – 130 km/h)PressPress
Approximately 80 mph
(130 km/h) or moreOperation not possibleOperation not possible

3294-5. Using the driving support systems
4
Driving
With the engine switch in IGNITION
ON mode, pressing the TVD switch
changes the TVD control mode.
The current TVD control mode will be
displayed on the meters.
STANDARD mode
This is the default mode and pro-
vides an optimum balance of driving
agility and stability.
SLALOM mode
This mode emphasizes enhanced
steering response.
TRACK mode
This mode emphasizes stability for
high speed sporty driving.
The multi-information display shows the di stribution of driving force between the
right and left rear wheels. ( →P. 117)
TVD (Torque Vectoring Differential)∗
∗
: If equipped
The TVD system distributes driving force (torque) between the right an\
d left
rear wheels automatically. This syst em contributes to enhanced steering
response while cornering and increased traction when exiting a corner, pro-
viding an agile driving experience.
Changing TVD control modes
1
2
3
TVD control status on the multi-information display

3304-5. Using the driving support systems
■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 STAN-
DARD mode.
■Automatic disabling of the TVD system
If a malfunction is detected in the TVD system, a warn ing message will be displayed on
the multi-information display ( →P. 580) and the TVD system will be disabled automati-
cally. 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 th is case, a warning message will be displayed
on the multi-information display. ( →P. 581)
WARNING
■Cautions regarding the use of the system
The driver is solely responsible for safe driv ing. Do not overly rely on the TVD system.
Always drive safely, taking care to observe your surroundings.