2014 Lexus IS250 engine

2014-5. Using the driving support systems
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Driving
IS350/250_U (OM53758U)
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 ex ample of this would be if another driver
cuts in front of you while you are followi ng a vehicle. Apply the brakes 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 vehicle ahead matches or exceeds your vehicle
speed
●When the vehicle ahead is traveling at an extremely slow speed
●Immediately after the cruise control speed was set
●At the instant the accelerator is applied
When constant speed control mode is sele cted, your vehicle will maintain a set
speed without controlling the vehicle-to-vehicle distance. Select this mode only
when vehicle-to-vehicle distance contro l mode does not function correctly due
to dirt etc.
Press the “ON/OFF” button to acti-
vate the cruise control.
Press the button again to deactivate the
cruise control.
Switch to constant speed control
mode.
(Push the lever forward and hold for
approximately one second.)
Constant speed control mode indicator will come on.
When in constant speed control mode, to return to vehicle-to-vehicle distance con-
trol mode, push the lever forward agai n and hold for approximately 1 second.
After the desired speed has been set, it is not possible to return to vehicle-to-vehicle
distance control mode.
If the engine switch is turned off and then turned to IGNITION ON mode again, the
vehicle will automatically return to vehicle-to-vehicle distance control mode.
Adjusting the speed setting: P. 1 9 3
Canceling and resuming the speed setting: P. 1 9 3
Approach warning
Selecting conventional constant speed control mode
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2094-5. Using the driving support systems
4
Driving
IS350/250_U (OM53758U)
Press the LDA switch to activate the
system.
The LDA indicator and lane lines will
come on.
Press the switch again to turn the LDA
system off.
The LDA system will remain on or off
even if the engine switch is turned to
IGNITION ON mode.
●When the vehicle speed is approximately 32 mph (50 km/h) or more
●When the lane width is more than approximately 8.2 ft. (2.5 m)
●When driving on a straight road or through a curve with a radius of more than
approximately 328 ft. (100 m)
Turning the LDA system on
Operating conditions

2184-5. Using the driving support systems
IS350/250_U (OM53758U)
You can change the warning beep volume and Lexus Display Audio screen
operating conditions. Press the “MENU” button on the Lexus Display Audio controller. ( P. 2 6 2 )
Select “SETUP” on the “Menu” screen.
Select “Vehicle” on the “Setup” screen.
Select “LEXUS Park Assist” on the “Vehicle Settings” screen.
Select the desired button.
The alert volume can be adjusted.
On or off can be selected for intu-
itive parking assist display.
Front or rear center sensors dis-
play and tone indication can be
set.
■The intuitive parking assist can be operated when
●Front center sensors:
• The engine switch is in IGNITION ON mode.
• The shift lever is in a position other than P or R.
• The vehicle speed is less than about 6 mph (10 km/h).
●Front corner sensors:
• The engine switch is in IGNITION ON mode.
• The shift lever is in a position other than P.
• The vehicle speed is less than about 6 mph (10 km/h).(At any speed when the shift lever is in R)
●Rear corner and rear center sensors:
• The engine switch is in IGNITION ON mode.
• The shift lever is in R.
Setting up intuitive parking assist
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2194-5. Using the driving support systems
4
Driving
IS350/250_U (OM53758U)
■Sensor detection information
●The sensor’s detection areas are limited to the areas around the vehicle’s front corner
and rear bumpers.
●Certain vehicle conditions and the surround ing environment may affect the ability of
the sensor to correctly detect obstacles. 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 th e 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 co nsiderably 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, air brakes 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 ar e instances in which, because of their shape,
signs and other objects may be judged by the sensor to be closer than they are.
●The shape of the obstacle may prevent the sensor from detecting it. Pay particular
attention to the following obstacles:
• Wires, fences, ropes, etc.
• Cotton, snow and other materials that absorb sound waves
• Sharply-angled objects
•Low obstacles
• Tall obstacles with upper sections projecting outwards in the direction of your vehi-
cle
●The following situations may occur during use.
• Depending on the shape of the obstacle and other factors, the detection distance may shorten, or detect ion may be impossible.
• Obstacles may not be detected if they are too close to the sensor.
• There will be a short delay between obst acle detection and display. Even at slow
speeds, there is a possibility that the obstacle will come within the sensor’s detection
areas before the display is shown and the warning beep sounds.
• Thin posts or objects lower than the sensor may not be detected when approached,
even if they have been detected once.
• It might be difficult to hear beeps due to the volume of the audio system or air flow noise of the air conditioning system.

2214-5. Using the driving support systems
4
Driving
IS350/250_U (OM53758U)
The rear view image is displayed when
the shift position is in R and the engine
switch is in IGNITION ON mode.
The rear view monitor system will be
deactivated when the shift lever is in any
position other than R.
Rear view monitor system
: If equipped
The rear view monitor system assists the driver by displaying guide lines and
an image of the view behind the vehi cle while backing up, for example while
parking.
The screen illustrations used in this text are intended as examples, and may dif-
fer from the image that is actually displayed on the screen.

2224-5. Using the driving support systems
IS350/250_U (OM53758U)
■Screen description
The rear view monitor system screen will be displayed if the shift lever is
shifted to R while the engine switch is in IGNITION ON mode. Vehicle width guide lines
The line indicates a guide path when the vehicle is being backed straight up.
The displayed width is wider than the actual vehicle width.
Vehicle center guide lines
These lines indicate the estimated vehicle center on the ground.
Distance guide line
The line shows points approximately 1.5 ft. (0.5 m) (red) from the center of the
edge of the bumper.
Distance guide line
The line shows distance behind the vehicle, a point approximately 3 ft. (1 m) (blue)
from the edge of the bumper.
Using the rear view monitor system
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2324-5. Using the driving support systems
IS350/250_U (OM53758U)
Vehicles with Adaptive Variable Suspension System Normal mode
For normal driving.
Press the switch to change the driving mode to normal mode when selected to Eco
drive mode or sport mode.
Eco drive mode
Use Eco drive mode to help achieve low fuel consumption during trips that
involve frequent accelerating.
When not in Eco drive mode and the drivin g mode select switch is turned to the
left, the Eco drive mode indicator comes on.
Sport mode
•SPORT S mode
Assists acceleration response by controlling the transmission and the
engine. Suitable for when powerful acceleration is desirable.
When not in SPORT S mode and the driving mode select switch is turned to the
right, the “SPORT S” indicator comes on.
•SPORT S+ modeHelps to ensure steering performanc e and driving stability by simulta-
neously controlling the steering and su spension in addition to the trans-
mission. Suitable for sporty driving.
When in SPORT S mode and the driving mode select switch is turned to the
right, the “SPORT S+” indicator comes on.
Except
F SPORT models F SPORT
models
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2334-5. Using the driving support systems
4
Driving
IS350/250_U (OM53758U)
■Operation of the air conditioning system in Eco drive mode
Eco drive mode controls the heating/cooling operations and fan speed of the air condi-
tioning system to enhance fuel efficiency ( P. 346). To improve air conditioning perfor-
mance, adjust the fan speed or turn off Eco drive mode.
■Sport mode automatic deactivation
Sport mode is automatically deactivated if the engine switch is turned off after driving in
sport mode.