display Lexus GS300h 2013 Repair Manual

3394-5. Using the driving support system
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Lane departure warning function
If the system judges that the vehicle may deviate from its lane, it
alerts the driver using beeping, screen displays and a sensory
warning
* given via the steering wheel.
*: A slight steering torque is applied for a short period of time in the direc-
tion of the center of the lane.
Lane keeping assist function
• This function will be active when the vehicle-to-vehicle dis-
tance control mode of the cruise control (P. 302) is set with
vehicle speed above approximately 72 km/h (45 mph) and
while the lane departure warning function is active.
• When the lane keeping assist function is active, a slight steer-
ing torque will be applied, to help the driver maintain the vehi-
cle inside the lane.
The lane keeping assist function will be temporarily canceled if the
steering wheel is not operated, or if you continue driving with your
hands lightly touching the steering wheel. (P. 343)
Functions included in the LKA
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3424-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
When the LKA system is on, the lane line display and steering
wheel display are shown.
Lane keeping assist function
operation indication
Steering wheel displayed:
Indicates that the function is cur-
rently operating. (If the lane depar-
ture warning operates at this time,
the steering wheel flashes orange.)
Steering wheel not displayed:
Indicates that the function is not
currently operating. (When the
lane keeping assist function is can-
celed, the buzzer will beep twice.)
Dynamic radar cruise control
display
Lane departure warning func-
tion indication (when the
inside of the white line is
white):
The function has recognized lane
markers. (If the lane departure
warning operates at this time, the
lines flash orange.)
Lane departure warning func-
tion indication (when the
inside of the white line is
black):
A lane marker is not recognized by
the system, or the LKA system
functions are temporarily canceled.
Indication on the multi-information display
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3434-5. Using the driving support system
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Driving
GS450h_300h_OM_OM30D53E_(EE)
Temporary cancelation of the LKA system functions
If any of the following occurs, the LKA system functions will be temporarily
canceled. The functions will resume after the necessary operating conditions
have returned.
The steering wheel is turned as far as necessary to cause the vehicle to
change lanes.
When the system detects no-handed driving. (The lane keeping assist func-
tion will be temporarily canceled, but the lane departure warning function
will continue.)
The turn signal lever is operated.
The vehicle speed deviates from the operating range of the LKA system
functions. (The buzzer will beep twice when the lane keeping assist func-
tion is being canceled.)
When the lane lines cannot be recognized while driving. (The buzzer will
beep twice when the lane keeping assist function is being canceled.)
The wiper switch is set on high speed mode or is set on AUTO mode with
wipers operating at high speed. (The lane keeping assist function will be
temporarily canceled, but the lane departure warning function will con-
tinue.)
If the vehicle crosses a line for approximately half a minute or more. (The
lane keeping assist function will be temporarily canceled, but the lane
departure warning function will continue.)
When the lane departure warning function is activated.
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
It may be difficult to feel the sensory warning depending on the road condi-
tions.
No-handed driving warning
If the steering wheel is not operated for approximately 15 seconds on a
straight road or approximately 5 seconds on a curve, the buzzer will beep
twice, indicators on the multi-information display will flash, and the lane
keeping assist function will be temporarily canceled. If you drive the vehicle
with your hands lightly touching the steering wheel, this may also be
detected as no-handed driving.

3444-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
After the vehicle has been parked in the sun
The LKA system functions may not be available and a warning message
(P. 854) will be displayed for a while after driving has started. In such
cases, turn the LKA system off and turn it on again after normal temperature
returns. When the temperature in the cabin decreases and the temperature
around the camera sensor (P. 338) becomes suitable for its operation, the
functions will begin to operate.
If there are lane markers on only one side of the vehicle
The lane keeping assist function will not operate. Also, the lane departure
warning will not operate for the side on which lane markers could not be rec-
ognized.
Conditions in which the function may not operate correctly
In the following conditions, the LKA system functions may not operate, or it
may not be possible to ensure adequate performance. Also, the camera sensor
may be unable to recognize lane lines causing the lane departure warning
function to operate incorrectly, or the lane keeping assist function may not
operate properly. 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 lanes 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 sys-
tem to recognize compared to white markers.)
When the lane markers are broken, “Raised pavement marker” or stones
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
When sunlight or the headlights of oncoming vehicles are shining directly
into the camera lens

3484-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
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, Remote
Touch screen and a buzzer. Always check the surrounding area
when using this system.
Types of sensors
Front center sensors
Front corner sensors
Rear corner sensors
Rear center sensors1
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3504-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
When the sensors detect an obstacle, a graphic is shown on the
multi-information display and Remote Touch screen depending on
the position and distance to the obstacle.
Multi-information display
Front corner sensor detec-
tion
Front center sensor detec-
tion
Rear corner sensor detection
Rear center sensor detection
Display
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3514-5. Using the driving support system
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Driving
GS450h_300h_OM_OM30D53E_(EE)
Remote Touch screen
For 8-inch display
When the parking assist
monitor system is not dis-
played
A graphic is automatically dis-
played when an obstacle is
detected. The screen can be set
so that the graphic is not dis-
played. (P. 356)
When the rear view monitor
system is displayed (insert
display)
A simplified image is displayed
on the right upper corner of the
Remote Touch screen when an
obstacle is detected.
For 12.3-inch display
A graphic will be shown on
the side display
A graphic is automatically dis-
played when an obstacle is
detected. The screen can be set
so that the graphic is not dis-
played. (P. 356)
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3524-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
Front center sensor
Sensor detection display, obstacle distance
Approximate
distance to obsta-
cleMulti-
information
display
Remote Touch screen
8-inch
display
8-inch
display
(insert
display)
12.3-inch
display
100 cm (3.3 ft.) to
50 cm (1.6 ft.)
(continuous)(continuous)(blinking
slowly)(continuous)
50 cm (1.6 ft.) to
37.5 cm (1.2 ft.)
(continuous)(continuous)(blinking)(continuous)
37.5 cm (1.2 ft.)
to
30 cm (1.0 ft.)
(continuous)(continuous)(blinking
rapidly)(continuous)
Less than
30 cm (1.0 ft.)
(blinking)(continuous)(continuous)(continuous)

3534-5. Using the driving support system
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Driving
GS450h_300h_OM_OM30D53E_(EE)
Corner sensors
Approximate
distance to obsta-
cleMulti-
information
display
Remote Touch screen
8-inch
display
8-inch
display
(insert
display)
12.3-inch
display
60 cm (2.0 ft.) to
45 cm (1.5 ft.)
(continuous)(continuous)(blinking)(continuous)
45 cm (1.5 ft.) to
30 cm (1.0 ft.)
(continuous)(continuous)(blinking
rapidly)(continuous)
Less than
30 cm (1.0 ft.)
(blinking)(continuous)(continuous)(continuous)

3544-5. Using the driving support system
GS450h_300h_OM_OM30D53E_(EE)
Rear center sensor
Approximate dis-
tance to obstacleMulti-informa-
tion
displayRemote Touch screen
8-inch display
(insert display)12.3-inch dis-
play
150 cm (4.9 ft.) to
60 cm (2.0 ft.)
(continuous)(blinking
slowly)(continuous)
60 cm (2.0 ft.) to
45 cm (1.5 ft.)
(continuous)(blinking)(continuous)
45 cm (1.5 ft.) to
35 cm (1.1 ft.)
(continuous)(blinking rap-
idly)(continuous)
Less than
35 cm (1.1 ft.)
(blinking)(continuous)(continuous)