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4-5. Using the driving support systems
LS500h_OM_OM50F42U_(U)
4
Driving
operating, a buzzer may sound to indicate
that the function has been temporarily can-
celed . If the alert type customization setting
is set to vibrate the steering wheel, the
buzzer will not sound. (The steering wheel
will vibrate.)
If a message urging operation of the steer-
ing wheel is displayed, operate the steering
wheel.
■ Steering assist function/lane centering
function
Depending on the vehicle speed, lane
departure situation, road conditions, etc.,
the driver may not feel the function is oper-
ating or the function may not operate at all.
The steering control of the function is over-
rided by the driver’s steering wheel opera-
tion.
When the vehicle speed is approximately
31 mph (50 km/h) or less, the warning dis-
play of the lane centering function will not
operate.
Do not attempt to activate the steering
assist function.
■ Lane departure alert function
The warning buzzer may be difficult to hear
due to external noise, audio playback, etc.
Also, it may be difficult to feel steering
wheel vibrations due to the road conditions,
etc.
If the edge of the road is not clear or
straight, the lane departure alert function or
steering assist function may not operate.
In situations such as the following, it may not
be possible for the system to determine if
there is danger of a collision with an over-
taking vehicle in an adjacent lane:
● When the relative speed between your
vehicle and surrounding vehicles is large
● When driving around a curve
Do not attempt to activate the lane depar-
ture alert function.
■ Hands off steering wheel alert
When the system determines that the driver
has removed the hands from the steering
wheel while the steering assist function or
lane centering function is operating, a warn-
ing message is displayed on the multi-infor-
mation display. If the driver continues to
keep the hands off of the steering wheel for
6 seconds, a buzzer sounds, a warning
message is displayed and the function is
temporarily canceled. This alert also oper-
ates in the same way when the driver con-
tinuously operates the steering wheel only a
small amount. If the steering assist function
is canceled, release the steering wheel and
then grip it again to enable the function.
In situations such as the following, the sys-
tem may not be able to detect when the
driver’s hands are on the steering wheel:
● If a steering wheel cover is installed.
● If the driver is wearing gloves.
● If something is attached to the steering
wheel.
● If the driver is gripping the wood trim,
stitched area, spokes, or other part of the
steering wheel that does not have sen-
sors.
In situations such as the following, the hands
off steering wheel alert may not operate
and the steering assist function and lane
centering function may operate even if the
driver’s hands are off the steering wheel:
● If an object contacts the steering wheel.
● If a wide object or arms are held in front
of the steering wheel.
■ Conditions in which functions may not
operate properly
In the following situations, the functions may
not operate properly:
● There are shadows on the road that run
parallel with, or cover, the white (yellow)
lines.
● The vehicle is driven in an area without
white (yellow) lines, such as in front of a
tollgate or checkpoint, or at an intersec-
tion, etc.
● The white (yellow) lines are cracked,
“Botts’ dots”, “Raised pavement marker”
or stones are present.
● The white (yellow) lines cannot be seen
or are difficult to see due to sand, etc.
● The vehicle is driven on a road surface
that is wet due to rain, puddles, etc.
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