
3324-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
This mode employs a radar sensor to detect the presence of vehicles up to
approximately 100 m (328 ft.) ahead, determines the current vehicle-to-vehicle
following distance, and operates to maintain a suitable following distance from
the vehicle ahead.
Note that vehicle-to-vehicle distance will close in when traveling on long downhill slopes.
Example of constant speed cruising
When there are no vehicles ahead
The vehicle travels at the speed set by the driver. The desired vehicle-to-vehicle dis- tance can also be set by operating the vehicle-to-vehicle distance button.
Example of deceleration cruising and follow-up cruising
When a preceding vehicle driving slower than the set speed appears
When a vehicle is detected running ahead of you, the system automatically deceler- ates your vehicle. When a greater reductio n in vehicle speed is necessary, the system applies the brakes (the stop lights will come on at this time). The system will respond to
changes in the speed of the vehicle ahead in order to maintain the vehicle-to-vehicle distance set by the driver. Approach wa rning warns you when the system cannot decelerate sufficiently to prevent your vehicle from closing in on the vehicle ahead.
When the vehicle ahead of you stops, your ve hicle will also stop (vehicle is stopped by system control). After the vehicle ahead starts off, pushing the cruise control lever upor depressing the accelerator peda l will resume follow-up cruising.
Example of acceleration
When there are no longer any preceding vehicles driving slower than the set
speed
The system accelerates until the set speed is reached. The system then returns to con-
stant speed cruising.
Driving in vehicle-to-veh icle distance control mode
1
2
3

3544-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
WARNING
■When the Stop & Start system is operating
●Depress the brake pedal and apply the parking brake when necessary while the engine is stopped by the Stop & Start system (while the Stop & Start indicator is on).
(Except when the brake hold system is operating or when the vehicle comes to a con- trolled stop while driving with the dynamic radar cruise control with full-speed range in vehicle-to-vehicle distan ce control mode [if equipped])
●Do not allow anyone to leave the vehicle while the engine is stopped by the Stop & Start system (while the Stop & Start indicator is on).An accident may occur due to the automatic engine start function.
●Ensure that the engine is not stopped by the Stop & Start system while the vehicle is ina poorly ventilated area. The engine may restart due to the automatic engine startfunction, causing exhaust gases to collect and enter the vehicle, possibly resulting in
death or a serious health hazard.
NOTICE
■To ensure the system operates correctly
If any of the following situations occur, the Stop & Start system may not operate cor- rectly. Have your vehicle inspected by any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
●While the driver's seat belt is fastened, the driver's and front passenger's seat belt reminder light flashes.
●Even though the driver's seat belt is not fastened, the driver's and front passenger'sseat belt reminder light does not illuminate.
●Even though the driver's door is closed, the open door warning is displayed on the
multi-information display or the interior lig ht is illuminated when door linked illumina- tion is enabled ( P. 553).
●Even though the driver's door is open, the open door warning is not displayed on the
multi-information display or the interior light does not illuminate when door linked illumination is enabled ( P. 553).

3774-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■The Lexus parking assist-sensor can be operated when
●Front corner sensors:
• The engine switch is in IGNITION ON mode. • The shift lever is in other than P.
• The vehicle speed is less than about 10 km/h (6 mph). (At any speed when the shift lever is in R)
●Front center sensors:
• The engine switch is in IGNITION ON mode. • The shift lever is in other than P or R.
• The vehicle speed is less than about 10 km/h (6 mph).
●Rear corner and rear center sensors:
• The engine switch is in IGNITION ON mode. • The shift lever is in R.
■Lexus parking assist-sensor display
●Vehicles with a Lexus Display Audio system : When an obstacle is detected while the Lexus parking assist monitor is in use, the warning indicator will appear in the upperpart of the screen even if the display setting has been set to off.
●Vehicles with a navigation system: If the Lexu s parking assist-sensor display is set to on, detected objects will also be displayed on the panoramic view monitor. For details, refer to “NAVIGATION SYSTEM OWNER’S MANUAL”.
■Sensor detection information
●The sensor’s detection areas are limited to the areas around the vehicle’s bumper.
●Certain vehicle conditions and the surrounding environment may affect the ability of a
sensor to correctly detect an obstacle. Particular instances where this may occur are listed below.
• There is dirt, snow or ice on the sensor . (Wiping the sensors will resolve this prob-
lem.) • The sensor is frozen. (Thawing the area will resolve this problem.) In especially cold weather, if a sensor is frozen the screen may show an abnormal
display, or obstacles may not be detected. • The sensor is covered in any way.• The vehicle is leaning considerably to one side.
• On an extremely bumpy road, on an incline, on gravel, or on grass. • The vicinity of the vehicle is noisy due to vehicle horns, motorcycle engines, airbrakes of large vehicles, or other loud noises producing ultrasonic waves.
• There is another vehicle equipped with parking assist sensors in the vicinity. • The sensor is coated with a sheet of spray or heavy rain. • The vehicle is equipped with a fender pole or wireless antenna.
• Towing eyelets are installed. • The bumper or sensor receives a strong impact.
• The vehicle is approaching a tall or curved curb. • In harsh sunlight or intense cold weather.• The area directly under the bumpers is not detected.
• If obstacles draw too close to the sensor. • A non-genuine Lexus suspension (low ered suspension etc.) is installed. • People may not be detected if they are wearing certain types of clothing.
In addition to the examples above, there are instances in which, because of their shape, signs and other objects may be judged by a sensor to be closer than they are.

3894-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■Situations in which the Intelligent Clearance Sonar function may operate even if there is no possibility of a collision
In some situations such as the following, the Intelligent Clearance Sonar function may
operate even though there is no possibility of a collision.
●Vehicle surroundings
• When driving toward a banner, flag, low- hanging branch or boom barrier (such as those used at railroad crossings, toll gates and parking lots).• When driving on a narrow path surrounded by a structure, such as in a tunnel or on
an iron bridge) • When parallel parking• When there is a rut or hole in the surface of the road
• When driving on a metal cover (grating), such as those used for drainage ditches • When driving on a steep slope
• If a sensor is hit by a large amount of wa ter, such as when driving on a flooded road
●Weather
• If a sensor is covered with ice, snow, dirt, etc. (when cleared, the system will return to normal)• If heavy rain or water strikes a sensor
• When driving in inclement weather su ch as fog, snow or a sandstorm
●Other ultrasonic waves sources
• When vehicle horns, vehicle detectors, motorcycle engines, air brakes of large vehi- cles, the clearance sonar of other vehicles or other devices which produce ultra-sonic waves are near the vehicle
• If a sticker or an electronic component, such as a backlit license plate (especially flu- orescent type), fog lights, a fender pole or wireless antenna is installed near a sensor
●Changes in the vehicle posture
• If the vehicle is significantly tilted • If the front of the vehicle is raised or lowered due to the carried load
• If the orientation of a sensor has been changed due to a collision or other impact
• When driving on a narrow road
• When driving on a gravel road or in an area with tall grass

3904-5. Using the driving support systems
RX350/RX200t_EE_OM48F32E
■If the Intelligent Clearance Sonar function operates unnecessarily such as at a railroad crossing
Even in the event that the Intelligent Cleara nce Sonar function operates unnecessarily,
such as at a railroad crossing, brake contro l will be canceled after approximately 2 sec- onds, allowing you to proceed forward and leave the area, Brake control can also be canceled by depressing the brake pedal. Depressing the accelerator pedal again will
allow you to proceed forward and leave the area.
■Situations in which the Intelligent Cleara nce Sonar Brake function may not operate properly
In some situations such as the following , this function may not operate properly.
●Weather
• If a sensor is covered with ice, snow, dirt, etc. (when cleared, the system will return to normal)
• If heavy rain or water strikes a sensor • When driving in inclement weather su ch as fog, snow or a sandstorm
●Vehicle surroundings
• When an object that cannot be detected is between the vehicle and a detected object
• If an object such as a vehicle, motorcycle, bicycle or pedestrian cuts in front of the vehicle or runs out from the side of the vehicle.
●Other ultrasonic waves sources
• When vehicle horns, vehicle detectors, motorcycle engines, air brakes of large vehi- cles, the clearance sonar of other vehicles or other devices which produce ultra-
sonic waves are near the vehicle • If a sticker or an electronic component, such as a backlit license plate (especially flu-orescent type), fog lights, a fender pole or wireless antenna is installed near a sensor
●Changes in the vehicle posture
• If the vehicle is significantly tilted
• If the front of the vehicle is raised or lowered due to the carried load • If the orientation of a sensor has been changed due to a collision or other impact
• When a sensor or the area around a sensor is extremely hot or cold
• When strong winds are blowing

3994-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■Situations in which the Rear Crossing Traffic Auto Brake function may not operate properly
In some situations such as the following , this function may not operate properly.
●Objects and vehicles which the radar sensors are not designed to detect
• Stationary objects • Vehicles which are moving away from your vehicle
• Pedestrians, motorcycles, bicycles, etc.*• Objects which are extremely close to a radar sensor • Vehicles which are approaching from the right or left at the rear of the vehicle at a
traveling speed of less than approximately 8 km/h (5 mph) • Vehicles which are approaching from the right or left at the rear of the vehicle at a traveling speed of more than a pproximately 24 km/h (15 mph)
*: Depending on conditions, detection of a vehicle and/or object may occur.
●Situations in which the radar sensors may not be able to detect an object
• When a sensor or the area around a sensor is extremely hot or cold • If the rear bumper is covered with ice, snow, dirt, etc.
• If heavy rain or water strikes the vehicle • When the detection area of a radar sensor is obstructed by an adjacent vehicle• If the vehicle is significantly tilted
• If towing eyelets are installed • If the suspension has been modified or ti res of a size other than specified are installed
• If the front of the vehicle is raised or lowered due to the carried load • If a sticker or an electronic component, such as a backlit license plate (especially flu-orescent type), fog lights, a fender pole or wireless antenna is installed near a radar
sensor • If the orientation of a radar sensor has been changed due to a collision or other
impact or removal and installation • When multiple vehicles are approaching wi th only a small gap between each vehicle • When a vehicle is approaching at high speed
●Situations in which the radar sensor may not detect a vehicle
• When a vehicle approaches from the right or left at the rear of the vehicle while youare turning while backing up
• When turning while backing up
• When backing out of a shallow angle park-
ing spot

4234-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
◆EPS (Electric Power Steering)
Employs an electric motor to reduce the amount of effort needed to turn the
steering wheel
◆Dynamic Torque Control AWD system (AWD models)
Automatically switches from front-wheel drive to all-wheel drive (AWD)
according to the driving conditions, helping to ensure reliable handling and
stability. Examples of conditions where the system will switch to AWD are
when cornering, going uphill, starting off or accelerating, and when the road
surface is slippery due to snow, rain, etc.
◆Adaptive Variable Suspension System (if equipped)
Controls the damping force of the shock absorber of each wheel according to
the road and driving conditions, helping achieve a comfortable ride, excellent
driveability and a high level of stability.
If SPORT S+ mode is selected using the driving mode select switch, the
damping force will become more suitable for sporty driving. ( P. 418)
◆VDIM (Vehicle Dynamics Integrated Management) (if equipped)
Provides integrated control of the ABS, brake assist, TRC, VSC, hill-start
assist control and EPS systems
Helps to maintain vehicle stability when swerving on slippery road surfaces by
controlling the brakes and engine output
◆Emergency brake signal
When the brakes are applie d suddenly, the stop lights automatically flash to
alert the vehicle behind.

4254-5. Using the driving support systems
4
Driving
RX350/RX200t_EE_OM48F32E
■Turning off both TRC and VSC systems
To turn the TRC and VSC systems off, pr ess and hold for more than 3 seconds
while the vehicle is stopped.
The VSC OFF indicator light will come on an d the “Traction Control Turned Off” will be
shown on the multi-information display.
*
Press again to turn the systems back on.
*: On vehicles with PCS (Pre-Crash Safety system), pre-crash brake assist and pre-
crash braking will also be disabled. ( P. 312)
■When the message is displayed on the mult i-information display showing that TRC has
been disabled even if the VSC OFF switch has not been pressed
TRC cannot be operated. Contact any authoriz ed Lexus dealer or repairer, or another
duly qualified and equipped professional.
■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 shifted 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, TRC, VSC 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 st arted 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 occu r 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 also after the vehicle comes to a stop.
• The brake pedal may pulsate slig htly after the ABS is activated.
• The brake pedal may move down slig htly 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.