Honda 2009 Pilot Owner's Manual page 398

Parking Sensor System
Rear Center Sensor Operation
About 24-40 in
(0.6-1 m)
Distance
Bottom
indicator stays on
Indicator
Beeper Long beeps
392
About 18-24 in About 14-18 in
(0.45-0.6 m) (0.35-0.45 m)
Bottom
Bottom
indicator stays on indicator stays on
Short beeps
Very short beeps
About 14 in
(0.35 m) or less
Bottom
indicator stays on
Continuous
beeps