Mazda 2 2015 Owner's Manual page 299

When Driving
Parking Sensor System
Parking Sensor Warning Beep
The beeper sounds as follows while the system is operating.
Rear Sensor
Distance detection area
Farthest distance
Far distance
Middle distance
Close distance
*1 The rate at which the intermittent sound beeps increases as the vehicle approaches the obstruction.
4–156
Distance between vehicle and obstruction
Approx. 150 cm—60 cm (59.0—23.0 in)
Approx. 60—45 cm (23—17 in)
Approx. 45—35 cm (17—13 in)
Within approx. 35 cm (13 in)
*1
Beeper sound
Slow intermittent sound
Medium intermittent sound
Fast intermittent sound
Continuous sound