2013 Lexus IS300h Owner's Manual

2634-5. Using the driving support systems
4
Driving
IS300h_EE(OM53B95E)
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. 254) will not be activated, and a fatal or serious acci-
dent 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 func-
tion correctly
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 acci-
dent 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 effec-
tively.
Otherwise, the system may not function correctly and could result in an acci-
dent.
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 dam-
age 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 sensor 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.

2644-5. Using the driving support systems
IS300h_EE(OM53B95E)
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 vehi-
cle 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 dis-
play.
Camera sensor
LDA (Lane Departure Alert)

: If equipped
Summary of function

2654-5. Using the driving support systems
4
Driving
IS300h_EE(OM53B95E)
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 power switch is
turned to ON mode.
When the vehicle speed is approximately 50 km/h (32 mph) or more
When the lane width is more than approximately 2.5 m (8.2 ft.)
When driving on a straight road or through a curve with a radius of
more than approximately 100 m (328 ft.)
Turning the LDA system on
Operating conditions

2664-5. Using the driving support systems
IS300h_EE(OM53B95E)
When the inside of both lane lines
turn white:
Indicates that both right and left
lane markers are recognized.
If the vehicle deviates from the lane,
the lane line on the side the vehicle
has deviated from will flash in yel-
low. (P. 514)
When the inside of either lane line
turns white:
Indicates that the lane marker on the
white-marked side is recognized.
If the vehicle deviates from the side
of a lane with recognized lane mark-
ers, the lane line will flash in yellow.
(P. 514)
When the inside of both lane lines
are black:
Indicates that no lane markers are
recognized or the LDA system is
temporarily canceled.
Indication on the multi-information display

2674-5. Using the driving support systems
4
Driving
IS300h_EE(OM53B95E)
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 func-
tions.
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 sec-
onds 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. 518) will be
displayed for a while after driving has started. When the temperature in the cabin
decreases and the temperature around the camera sensor (P. 264) becomes suit-
able for its operation, 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. How-
ever, 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 recognize 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

2684-5. Using the driving support systems
IS300h_EE(OM53B95E)
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
When sunlight or the headlights of oncoming vehicles are shining directly into
the camera lens
When driving on roads that are branching or merging
When driving on a road surface that is wet due to rain, previous rainfall, stand-
ing water, etc.
When the vehicle experiences strong up-and-down motion such as when driv-
ing on an extremely rough road or on a seam in the pavement
When headlight brightness at nighttime is reduced due to dirt on the lenses, or
when the headlights are misaligned
When driving on winding roads or roads that are uneven
When driving on rough or unpaved roads
When changing the tires
Depending on the tires used, sufficient performance may not be maintainable.
Warning messages for the LDA system
Warning messages are used to indicate a system malfunction or to inform the
driver of the need for caution while driving. (P. 518)

2694-5. Using the driving support systems
4
Driving
IS300h_EE(OM53B95E)
CAUTION
Before using the LDA system
Do not rely solely on the LDA system. The LDA system does not drive the
vehicle automatically, nor does it reduce the amount of care you need to take.
As such, the driver must always assume full responsibility for understanding
his/her surroundings, for operating the steering wheel to correct the driving
line, and for driving safely.
Inappropriate or negligent driving could lead to an accident.
To avoid operating the LDA by mistake
Switch the LDA system off using the LDA switch when not in use.
Situations unsuitable for LDA system
Do not use the LDA system in any of the following situations.
Otherwise, the system may not function correctly and could result in an acci-
dent.
When driving with tire chains, a spare tire, or similar equipment
When there are objects or structures along the roadside that might be misin-
terpreted as lane markers (such as guardrails, a curb, reflector posts, etc.)
When driving on snowy roads
When pavement lane markers are difficult to see due to rain, snow, fog, sand
dust, etc.
When there are visible lines on the pavement from road repairs, or if the
remains of old lane markers are still visible on the road
When driving on a road with lane closures due to maintenance, or when driv-
ing in a temporary lane

2704-5. Using the driving support systems
IS300h_EE(OM53B95E)
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, con-
densation 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 qualified 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 disas-
semble 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.