Honda CR-V 2016 User's Information Manual page 8

How the Backup Sensors Work
The sensors detect the closest object.
In this example, the corner
sensor detects the side wall.
The sensors may not detect taller vehicles or
objects.
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While driving in Reverse and towing, the system
will beep. When this occurs, turn the backup sensor
switch to OFF.
© 2016 American Honda Motor Co., Inc. - All Rights Reserved.
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