Lexus NX450h+ 2021 Owner's Manual page 526

6-2. Using the safe driving support functions
● When a new sign has not been detected for a certain distance
● When the system determines that a sign is no longer valid
When the system determines that the road being driven on has changed, such as after
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a left or right turn
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Situations in which the display function may not operate properly
In the following situations, the RSA system may not operate properly and may not detect
signs or may display the incorrect sign. However, this does not indicate a malfunction.
● When a sign is dirty, faded, tilted or bent
● When the contrast of an electronic sign is low
When all or part of a sign is hidden by a tree, utility pole, etc.
●
When a sign is detected by the front camera for a short amount of time
●
● When the driving state (turning, changing lanes, etc.) is judged incorrectly
● When a sign is immediately after a freeway junction or in an adjacent lane just before
merging
● When stickers are attached to the rear of a preceding vehicle
When a sign similar to a system compatible sign is detected as a system compatible
●
sign
When a speed limit sign for a frontage road is within detection range of the front
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camera
When driving around a roundabout
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When a sign intended for trucks, etc. is detected
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● When the vehicle is driven in a country with a different direction of traffic
● When the navigation system map data is out of date
When the navigation system cannot be used
●
In this case, the speed limit signs displayed on the multi-information display and
navigation system display may differ.
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Customize settings
The settings of the RSA system can be changed through customize settings.
Notification function
In the following situations, the RSA system will output a warning to notify the driver.
If the vehicle speed exceeds the speed warning threshold of the speed limit sign
●
displayed on the multi-information display, the sign display will be emphasized
and a buzzer will sound.
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