Lexus GS450h2016 Service Manual page 239

Hands off steering wheel alert
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When the system determines that the driver has removed their hands from the steering
wheel while the lane departure control function or lane centering function is operating, a
warning message is displayed on the multi-information display and the buzzer sounds.
White (yellow) lines are only on one side of road
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The LKA system will not operate for the side on which white (yellow) lines could not be
recognized.
Conditions in which functions may not operate properly
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In the following situations, the camera sensor may not detect white (yellow) lines and var-
ious functions may not operate normally.
There are shadows on the road that run parallel with, or cover, the white (yellow) lines.
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The vehicle is driven in an area without white (yellow) lines, such as in front of a tollgate
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or checkpoint, or at an intersection, etc.
The white (yellow) lines are cracked, "Botts' dots", "Raised pavement marker" or stones
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are present.
The white (yellow) lines cannot be seen or are difficult to see due to sand, etc.
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The vehicle is driven on a road surface that is wet due to rain, puddles, etc.
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The traffic lines are yellow (which may be more difficult to recognize than lines that are
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white).
The white (yellow) lines cross over a curb, etc.
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The vehicle is driven on a bright surface, such as concrete.
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The vehicle is driven on a surface that is bright due to reflected light, etc.
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The vehicle is driven in an area where the brightness changes suddenly, such as at the
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entrances and exits of tunnels, etc.
Light from the headlights of an oncoming vehicle, the sun, etc., enters the camera.
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The vehicle is driven where the road diverges, merges, etc.
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The vehicle is driven on a slope.
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The vehicle is driven on a road which tilts left or right, or a winding road.
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The vehicle is driven on an unpaved or rough road.
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The vehicle is driven around a sharp curve.
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The traffic lane is excessively narrow or wide.
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The vehicle is extremely tilted due to carrying heavy luggage or having improper tire
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pressure.
The distance to the preceding vehicle is extremely short.
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The vehicle is moving up and down a large amount due to road conditions during driv-
●
ing (poor roads or road seams).
GS450h_OM_OM30E99U_(U)
4-5. Using the driving support systems
239
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