2014 Lexus IS250 sensor

2394-5. Using the driving support systems
4
Driving
IS250_EE(OM53C51E)
CAUTION
■Before using dynamic radar cruise control
Do not overly rely on vehicle-to-vehicle distance control.
Be aware of the set speed. If automatic deceleration/acceleration is not appropriate,
adjust the vehicle speed, as well as the distance between your vehicle and vehicles
ahead by applying the brakes etc.
■Cautions regarding the driving assist systems
Observe the following precautions.
Failure to do so may cause an accident resulting in death or serious injury.
●Assisting the driver to measure following distance
The dynamic radar cruise control is only intended to help the driver in determining
the following distance between the driver’s own vehicle and a designated vehicle
traveling ahead. It is not a mechanism that allows careless or inattentive driving, and it
is not a system that can assist the driver in low-visibility conditions. It is still necessary
for driver to pay close attention to the vehicle’s surroundings.
●Assisting the driver to judge proper following distance
The dynamic radar cruise control determines whether the following distance
between the driver’s own vehicle and a designated vehicle traveling ahead is appro-
priate or not. It is not capable of making any other type of judgement. Therefore, it is
absolutely necessary for the driver to remain vigilant and to determine whether or not
there is a possibility of danger in any given situation.
●Assisting the driver to operate the vehicle
The dynamic radar cruise control has no capability to prevent or avoid a collision with
a vehicle traveling ahead. Therefore, if there is ever any danger, the driver must take
immediate and direct control of the vehicle and act appropriately in order to ensure
the safety of all involved.
■To avoid inadvertent cruise control activation
Switch the cruise control off using the “ON/OFF” button when not in use.
■Situations unsuitable for dynamic radar cruise control
Do not use dynamic radar cruise control in any of the following situations.
Doing so may result in inappropriate speed control and could cause an accident result-
ing in death or serious injury.
●In heavy traffic
●On roads with sharp bends
●On winding roads
●On slippery roads, such as those covered with rain, ice or snow
●On steep downhills, or where there are sudden changes between sharp up and down
gradients
Vehicle speed may exceed the set speed when driving down a steep hill.
●At entrances to expressways
●When weather conditions are bad enough that they may prevent the sensors from
functioning correctly (fog, snow, sandstorm, heavy rain, etc.)
●When an approach warning buzzer is heard often
●When your vehicle is towing a trailer or during emergency towing

2404-5. Using the driving support systems
IS250_EE(OM53C51E)
CAUTION
■When the sensor may not be correctly detecting the vehicle ahead
Apply the brakes as necessary when any of the following types of vehicles are in front of
you.
As the sensor may not be able to correctly detect these types of vehicles, the approach
warning (→P. 234) will not be activated, and a fatal or serious accident may result.
●Vehicles that cut in suddenly
●Vehicles traveling at low speeds
●Vehicles that are not moving
●Vehicles with small rear ends (trailers with no load on board etc.)
●Motorcycles traveling in the same lane
■Conditions under which the vehicle-to-vehicle distance control may not function cor-
rectly
Apply the brakes as necessary in the following conditions as the radar sensor may not
be able to correctly detect vehicles ahead, and a fatal or serious accident may result:
●When water or snow thrown up by a the surrounding vehicles hinders the functioning
of the sensor
●When your vehicle is pointing upwards (caused by a heavy load in the trunk etc.)
●When the road curves or when the lanes are narrow
●When steering wheel operation or your position in the lane is unstable
●When the vehicle ahead of you decelerates suddenly
■Handling the radar sensor
Observe the following to ensure the cruise control system can function effectively.
Otherwise, the system may not function correctly and could result in an accident.
●Keep the sensor and grille cover clean at all times.
Clean the sensor and grille cover with a soft cloth so you do not mark or damage
them.
●Do not subject the sensor or surrounding area to a strong impact.
If the sensor moves even slightly off position, the system may malfunction. If the sen-
sor or surrounding area is subject to a strong impact, always have the area inspected
and adjusted by any authorized Lexus dealer or repairer, or another duly qualified
and equipped professional.
●Do not disassemble the sensor.
●Do not attach accessories or stickers to the sensor, grille cover or surrounding area.
●Do not modify or paint the sensor and grille cover.
●Do not replace them with non-genuine parts.

2414-5. Using the driving support systems
4
Driving
IS250_EE(OM53C51E)
While driving on a road that has lane markers, this system recognizes the lane
markers using a camera as a sensor to alert the driver when the vehicle deviates
from its lane.
If the system judges that the vehicle has deviated from its lane, it alerts the driver
using a buzzer and indications on the multi-information display.
Camera sensor
LDA (Lane Departure Alert)∗
∗
: If equipped
Summary of function

2444-5. Using the driving support systems
IS250_EE(OM53C51E)
■Temporary cancelation of the LDA system functions
If any of the following occurs, the LDA system functions will be temporarily canceled. The
functions will resume after the necessary operating conditions have returned.
●The turn signal lever is operated.
●The vehicle speed deviates from the operating range of the LDA system functions.
●When the lane lines cannot be recognized while driving.
●When the lane departure warning sounds.
The lane departure warning function will not operate again for a several seconds after it
has been activated, even if the vehicle leaves the lane again.
■The lane departure warning
Depending on the audio system sound level or air conditioning fan noise while the audio
system or air conditioning system is in use, it may be difficult to hear the warning sound.
■After the vehicle has been parked in the sun
The LDA system may not be available and a warning message (→P. 486) will be dis-
played for a while after driving has started. When the temperature in the cabin decreases
and the temperature around the camera sensor (→P. 241) becomes suitable for its oper-
ation, the functions will begin to operate.
■If there are lane markers on only one side of the vehicle
The lane departure warning will not operate for the side on which lane markers could not
be recognized.
■Conditions in which the function may not operate correctly
In the following situations, the camera sensor may be unable to recognize lane markers
causing the lane departure warning function to operate incorrectly. However, this does
not indicate a malfunction.
●When driving through an area with no lane markers, such as a tollbooth, a crossing or
before a ticket checkpoint
●When driving on a sharp curve
●When lane markers are extremely narrow or extremely wide
●When the vehicle leans to one side an unusual amount due to a heavy load or improper
tire inflation pressure
●When the following distance between your vehicle and the vehicle ahead is extremely
short
●When the lane markers are yellow (These may be more difficult for the system to rec-
ognize compared to white markers.)
●When the lane markers are broken, Botts’ dots (raised pavement markers) or stones
●When the lane markers are on a curb etc.
●When lane markers are obscured or partially obscured by sand, dirt, etc.
●When there are shadows on the road running parallel with lane markers, or if a shadow
covers the lane markers
●When driving on a particularly bright road surface, such as concrete
●When driving on a road surface that is bright due to reflected light
●When driving in a location where the light level changes rapidly, such as the entrance to
or exit from a tunnel

2464-5. Using the driving support systems
IS250_EE(OM53C51E)
NOTICE
■To prevent damage to or incorrect operation of the LDA system
●Do not modify the headlights or attach stickers to the surface of the lights.
●Do not modify the suspension or replace it with non-genuine parts.
●Do not install or place anything on the hood or the grille. Also, do not install a grille
guard (bull bars, kangaroo bar etc.).
●If your windshield needs repairs, contact any authorized Lexus dealer or repairer, or
another duly qualified and equipped professional.
■Camera sensor
Observe the following to ensure that the LDA system functions correctly.
●Keep the windshield clean at all times.
Performance could be affected if the windshield is dirty, or if raindrops, condensation
or ice are adhering to the windshield.
●Do not spill liquid onto the camera sensor.
●Do not attach window tinting to the windshield.
●Do not install an antenna in front of the camera lens.
●If the windshield is fogged up, use the windshield defogger to remove fog from the
windshield.
When it is cold, using the heater with air blowing to the feet may allow the upper part
of the windshield to fog up. This will have a negative effect on the images.
●Do not scratch the camera lens, or let it get dirty.
When cleaning the inside of the windshield, be careful not to get any glass cleaner
etc. on the lens. Also, do not touch the lens.
For lens repair, contact any authorized Lexus dealer or repairer, or another duly qual-
ified and equipped professional.
●Do not change the installation position or direction of the camera sensor or remove it.
The direction of the camera sensor is precisely adjusted.
●Do not subject the camera sensor to strong impact or force, and do not disassemble
the camera sensor.
●Do not replace windshield with non-genuine windshield.
Contact any authorized Lexus dealer or repairer, or another duly qualified and
equipped professional.
●Do not attach a sticker or other items to the
windshield near the camera sensor.

2474-5. Using the driving support systems
4
Driving
IS250_EE(OM53C51E)
■Types of sensors
■Lexus parking assist-sensor switch
Turns the Lexus parking assist-sen-
sor on/off
When on, the indicator light comes
on to inform the driver that the sys-
tem is operational.
Lexus parking assist-sensor∗
∗: If equipped
The distance from your vehicle to nearby obstacles when parallel parking or
maneuvering into a garage is measured by the sensors and communicated via
the multi-information display, Lexus Display Audio screen (if equipped) and a
buzzer. Always check the surrounding area when using this system.
Front center sensors
Front corner sensorsRear corner sensors
Rear center sensors1
2
3
4

2484-5. Using the driving support systems
IS250_EE(OM53C51E)
When the sensors detect an obstacle, a graphic is shown on the multi-informa-
tion display and Lexus Display Audio screen (if equipped) depending on the
position and distance to the obstacle.
■Multi-information display
Front corner sensor detection
Front center sensor detection
Rear corner sensor detection
Rear center sensor detection
■Lexus Display Audio screen (if equipped)
When the rear view monitor sys-
tem is not displayed
A graphic is automatically displayed
when an obstacle is detected. The
screen can be set so that the graphic
is not displayed. (→P. 2 5 1 )
: Select to mute the
buzzer sounds.
When the rear view monitor sys-
tem is displayed (insert display)
A simplified image is displayed on
the upper right corner of the Lexus
Display Audio screen when an
obstacle is detected.
Display
1
2
3
4
1
2

2494-5. Using the driving support systems
4
Driving
IS250_EE(OM53C51E)
■Multi-information display and Lexus Display Audio screen (if equipped)
Sensors that detect an obstacle will illuminate continuously or blink.
*1: Multi-information display
*2: Lexus Display Audio screen
Sensor detection display, obstacle distance
Display
Insert display
(Lexus Display
Audio screen
only)Approximate distance to obstacle
Front corner sensor/
front center sensorRear corner sensor/
rear center sensor
(continuous)(blinking slowly)
Front center sensor
only:
100 cm (3.3 ft.) to 50
cm (1.6 ft.)Rear center sensor
only:
150 cm (4.9 ft.) to 60
cm (2.0 ft.)
(continuous)(blinking)
50 cm (1.6 ft.) to 40 cm
(1.3 ft.)60 cm (2.0 ft.) to 45
cm (1.5 ft.)
(continuous)(blinking rapidly)
40 cm (1.3 ft.) to 30 cm
(1.0 ft.)
Rear corner sensor:
45 cm (1.5 ft.) to 30 cm
(1.0 ft.)
Rear center sensor:
45 cm (1.5 ft.) to 35 cm
(1.1 ft.)
(blinking*1 or
continuous*2)(continuous)
Less than 30 cm (1.0 ft.)
Rear corner sensor:
Less than 30 cm (1.0 ft.)
Rear center sensor:
Less than 35 cm (1.1 ft.)