Lexus LS460 User Manual page 271

After the vehicle has been parked in the sun
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The LKA system functions may not be available and a warning message (P. 808)
will be displayed for a while after driving has started. In such cases, turn the LKA sys-
tem 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. 265)
becomes suitable for its operation, the functions will begin to operate.
If there are lane markers on only one side of the vehicle
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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 recognized.
Conditions in which the function may not operate correctly
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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 oper-
ate incorrectly, or the lane keeping assist function may not operate properly. How-
ever, this does not indicate a malfunction.
When driving through an area with no lane markers, such as a tollbooth, a crossing
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or before a ticket checkpoint
When driving on a sharp curve
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When lanes are extremely narrow or extremely wide
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When the vehicle leans to one side an unusual amount due to a heavy load or
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improper tire inflation pressure
When the following distance between your vehicle and the vehicle ahead is
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extremely short
When the lane markers are yellow (These may be more difficult for the system to
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recognize compared to white markers.)
When the lane markers are broken, "Botts' dots", "Raised pavement marker" or
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stones
When lane markers are obscured or partially obscured by sand, dirt, etc.
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When there are shadows on the road running parallel with lane markers, or if a
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shadow covers the lane markers
When driving on a particularly bright road surface, such as concrete
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When driving on a road surface that is bright due to reflected light
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When driving in a location where the light level changes rapidly, such as the
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entrance to or exit from a tunnel
When sunlight or the headlights of oncoming vehicles are shining directly into the
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camera lens
When driving on roads that are branching or merging
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LS460/LS460L_U (OM50D48U)
4-5. Using the driving support systems
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