Lexus LX570 Manual page 226

2-4. Using other driving systems
Beeps and obstacle distance
A beep sounds when the corner sensors and back sensors are operating.
● The beep sounds faster as the vehicle approaches an obstacle. 
When the vehicle comes within the following distance of the obstacle,
the beep sounds continuously.
• Front corner and back sensors: Approximately 1.1 ft. (35 cm)
• Rear corner sensors: Approximately 1.0 ft. (30 cm)
● When two or more obstacles are detected simultaneously, the beep
system responds to the nearest obstacle. If one or both come within
the above distances, the beep will repeat a long tone, followed by fast
beeps.
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LX570_U (OM60F86U)