diagram Lexus CT200h 2011 Owner's Manual (in English)

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2-4. Using other driving systems
CT200h_EE (OM76041E)Buzzer operation and distance to an obstacle
A buzzer sounds when the corner sensors and rear center sensor
are operating.
The buzzer beeps faster as the vehicle approaches an obstacle.
When the vehicle comes within the following distance of the
obstacle, the buzzer sounds continuously:
• Corner sensors:Approximately 25 cm (0.8 ft.)
•
Rear sensors: Approximately 35 cm (1.1 ft.)
When 2 or more obstacles are detected simultaneously, the
buzzer system responds to the nearest obstacle.
Detection range of the sensors
Approximately 50 cm (1.6
ft.)
Approximately 150 cm (4.9
ft.)
Approximately 50 cm (1.6
ft.)
The diagram shows the detec-
tion range of the sensors. Note
that the sensors cannot detect
obstacles that are extremely
close to the vehicle.
The range of the sensors may
change depending on the shape
of the object etc.