2015 LEXUS RC F cruise control

179
Driving4
RC350/RCF_U (OM24636U)
4-1. Before drivingDriving the vehicle ......................180
Cargo and luggage .................... 187
Vehicle load limits .......................190
Trailer towing .................................. 191
Dinghy towing............................... 192
4-2. Driving procedures Engine (ignition) switch ............ 193
Automatic transmission ............ 199
Turn signal lever ..........................204
Parking brake .............................. 205
ASC (Active Sound Control) (RC350) ................................... 206
ASC (Active Sound Control) (RC F)........................................... 207
4-3. Operating the lights and wipers
Headlight switch ........................ 208
Automatic High Beam ................211
Fog light switch............................. 216
Windshield wipers and washer........................................... 217
4-4. Refueling Opening the fuel tank cap .................................................225 4-5. Using the driving support
systems
Cruise control ............................. 229
Dynamic radar cruise control ......................................... 233
LDA (Lane Departure Alert) ........ 248
Intuitive parking assist .............. 254
Lexus parking assist monitor ........................................ 263
Driving mode select switch ........................................... 278
Driving assist systems............... 282
PCS (Pre-Collision System).......... 290
BSM (Blind Spot Monitor) ......297
• BSM function .......................... 301
• RCTA function ......................305
Active rear wing .......................... 310
TVD (Torque Vectoring Differential)................................. 313
4-6. Driving tips Winter driving tips ...................... 315

2034-2. Driving procedures
4
Driving
RC350/RCF_U (OM24636U)
■Automatic deactivation of shift range selection in the D position
Shift range selection in the D position will be deactivated in the following situations:
●When the vehicle comes to a stop
●If the accelerator pedal is depressed for more than a certain period of time
●When the shift lever is shifted to a position other than D
■To protect the automatic transmission
If the automatic transmission fluid temperatur e is high, “Transmission Fluid High Temper-
ature” will be displayed on th e multi-information display and the vehicle will go into trans-
mission protection mode automatically. Have the vehicle inspected by your Lexus dealer.
■Downshifting restriction warning buzzer
To help ensure safety and driving performa nce, downshifting operation may sometimes
be restricted. In some circumstances, downshifting may not be possible even when the
shift lever or paddle shift switch is operated. (A buzzer will sound twice.)
■Snow mode automatic deactivation
Snow mode is automatically deactivated if the engine switch is turned off after driving in
snow mode.
■When driving with cruise control or dynamic radar cruise control activated
Even when performing the following actions with the intent of enabling engine braking,
engine braking will not activate because cruise control or dynamic radar cruise control
will not be canceled.
●8-speed models: While driving in the D posi tion, downshifting to 7, 6, 5 or 4.
(  P. 229, 233)
●6-speed models: While driving in the D position, downshifting to 5 or 4.
( P. 229, 233)
●When switching the driving mode to sp ort mode while driving in D position.
(  P. 2 7 8 )
■If the shift lever cannot be shifted from P
P. 5 8 9
■AI-SHIFT
●The AI-SHIFT automatically selects the suitab le gear according to driver performance
and driving conditions.
The AI-SHIFT automatically operates when the sh ift lever is in D. (Shifting the shift lever
to the M position cancels the function.)
●8-speed models: G AI-SHIFT automatically se lects a suitable gear for sporty driving
according to driver’s input and driving co nditions. G AI-SHIFT operates automatically
when the shift lever is in D and sport mode is selected for the driving mode. (Selecting
normal mode with the driving mode select sw itch or shifting the shift lever to the M
position cancels this function.)
WA R N I N G
■When driving on slippery road surfaces
Be careful of downshifting and sudden accele ration, as this could result in the vehicle
skidding to the side or spinning.

229
4
Driving
RC350/RCF_U (OM24636U)4-5. Using the driving support systems
Use the cruise control to maintain a set speed without depressing the accelera-
tor pedal.
Indicators
Cruise control switch
Press the “ON/OFF” button to acti-
vate the cruise control.
Cruise control indicator will come on.
Press the button again to deactivate the
cruise control.
Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (above
approximately 25 mph [40 km/h])
and push the lever down to set the
speed.
Cruise control “SET” indicator will come
on.
The vehicle speed at the moment the
lever is released be comes the set speed.
Cruise control

: If equipped
Summary of functions
1
2
Setting the vehicle speed
1
2

2314-5. Using the driving support systems
4
Driving
RC350/RCF_U (OM24636U)
■Cruise control can be set when
●The shift lever is in D or M.
●Range 4 or higher of D or M has been selected by using the paddle shift switch.
●Vehicle speed is above approximately 25 mph (40 km/h).
■Accelerating after setting the vehicle speed
●The vehicle can be accelerated by operating accelerator pedal. After accelerating, the
set speed resumes.
●Even without canceling the cruise control, the set speed can be increased by first accel-
erating the vehicle to the desired speed and then pushing the lever down to set the new
speed.
■Automatic cruise control cancelation
Cruise control is automatically canceled in any of the following situations.
●Actual vehicle speed falls more than approximately 10 mph (16 km/h) below the set
speed.
●Actual vehicle speed is below approximately 25 mph (40 km/h).
●VSC is activated.
●TRAC is activated for a period of time.
●When the VSC or TRAC system is turned off by pressing the VSC OFF switch.
■If the warning message for the cruise contro l is shown on the multi-information display
Press the “ON/OFF” button once to deactivate the system, and then press the button
again to reactivate the system.
If the cruise control speed cannot be set or if the cruise control cancels immediately after
being activated, there may be a malfunction in the cruise control system. Have the vehi-
cle inspected by your Lexus dealer.

2324-5. Using the driving support systems
RC350/RCF_U (OM24636U)
WA R N I N G
■To avoid operating the cruise control by mistake
Switch the cruise control off using th e “ON/OFF” button when not in use.
■Situations unsuitable for cruise control
Do not use cruise control in any of the following situations.
Doing so may result in loss of control and could cause an accident resulting in death or
serious injury.
●In heavy traffic
●On roads with sharp bends
●On winding roads
●On slippery roads, such as thos e covered with rain, ice or snow
●On steep hills
Vehicle speed may exceed the set speed when driving down a steep hill.
●During emergency towing

2334-5. Using the driving support systems
4
Driving
RC350/RCF_U (OM24636U)
Without accelerator pedal operation by the driver, in vehicle-to-vehicle distance
control mode, the vehicle automatically accelerates and decelerates in accor-
dance to the changes in speed of the preceding vehicle. In constant speed con-
trol mode, the vehicle runs at a fixed speed.
Use the dynamic radar cruise control on freeways and highways.
●Vehicle-to-vehicle distance control mode ( P. 2 3 4 )
●Constant speed control mode ( P. 2 3 9 )
Vehicle-to-vehicle distance button
Display
Set speed
Indicators
Cruise control switch
Dynamic radar cruise control

: If equipped
Summary of functions
1
2
3
4
5

2354-5. Using the driving support systems
4
Driving
RC350/RCF_U (OM24636U)
Press the “ON/OFF” button to acti-
vate the cruise control.
Radar cruise control indicator will come
on and a message will be displayed on
the multi-information display.
Press the button again to deactivate the
cruise control.
Accelerate or decelerate, with
accelerator pedal operation, to the
desired vehicle speed (above
approximately 30 mph [50 km/h])
and push the lever down to set the
speed.
Cruise control “SET” indicator will come
on.
The vehicle speed at the moment the
lever is released becomes the set speed.
Setting the vehicle speed (vehicle-to-vehicle distance control mode)
1
2

2384-5. Using the driving support systems
RC350/RCF_U (OM24636U)
Pulling the lever toward you cancels
the speed control.
The speed setting is also canceled when
the brake pedal is depressed.
Pushing the lever up resumes the
speed control and returns vehicle
speed to the set speed.
Resuming is available when the vehicle
speed is more than approximately 25
mph (40 km/h).
When your vehicle is too close to a
vehicle ahead, and sufficient automatic
deceleration via the cruise control is
not possible, the display will flash and
the buzzer will sound to alert the driver.
An example of this would be if another
driver cuts in front of you while you are
following a vehicle. Depress the brake
pedal to ensure an appropriate vehicle-
to-vehicle distance.
■Warnings may not occur when
In the following instances, there is a po ssibility that the warnings will not occur:
●When the speed of the preceding vehicle matches or exceeds your vehicle
speed
●When the preceding vehicle is traveling at an extremely slow speed
●Immediately after the cruise control speed was set
●When depressing the accelerator pedal
Canceling and resuming the speed control
1
2
Approach warning (vehicle-to-vehicle distance control mode)