Lexus IS300H 2017 Manual page 291

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: If the turn signal indicator is not operated when changing lanes, the mark does not dis-
play.
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: Vehicles with a navigation system
Warning display
In the following situations, the RSA system alerts the driver using a warning dis-
play.
When the vehicle speed exceeds the speed warning threshold applied to the
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speed limit of the sign displayed on the multi-information display, the sign
color becomes inverted.
If it is detected that your vehicle is overtaking when a no overtaking sign is dis-
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played on the multi-information display, the sign flashes.
Vehicles with a navigation system: When the RSA system recognizes a no-
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entry sign and detects that the vehicle has entered a no-entry area based on
the map information of the navigation system, the no-entry sign flashes.
Depending on the situation, traffic environment (traffic direction, speed, unit)
may be detected incorrectly and a warning display may not operate properly.
Automatic turn-off of RSA sign display
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One or more signs automatically turn off in the following situations.
A new sign is not recognized for a certain distance.
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The road changes due to a left or right turn, etc.
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Conditions in which the function may not operate or detect correctly
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In the following situations, RSA does not operate normally and may not recognize signs,
display the incorrect sign, etc. However, this does not indicate a malfunction.
The camera sensor is misaligned due to a strong impact being applied to the sensor,
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etc.
Dirt, snow, stickers, etc. are on the windshield near the camera sensor.
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In inclement weather such as heavy rain, fog, snow or sand storms
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Light from an oncoming vehicle, the sun, etc. enters the camera sensor.
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The sign is dirty, faded, tilted or bent, and if an electronic sign, the contrast is poor.
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All or part of the sign is hidden by the leaves of a tree, a pole, etc.
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The sign is only visible to the camera sensor for a short amount of time.
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The driving scene (turning, lane change, etc.) is judged incorrectly.
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Even if it is a sign not appropriate for the currently traveled lane, such a sign exists
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directly after a freeway branches, or in an adjacent lane just before merging.
Stickers are attached to the rear of the preceding vehicle.
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A sign resembling a system compatible sign is recognized.
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The vehicle is driven in a country with a different direction of traffic.
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4-5. Using the driving support systems
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