Acoustic Vehicle Alerting System Description - Control/Function

Sound Operation 

The acoustic vehicle alerting system functions only when the power switch is ON, the vehicle is moving faster than 0.3 mph (0.5 km/h), your foot is off of the brake pedal, and the shift lever is in the D or R position. If these conditions are NOT met, the system makes no sound. The pitch of the alert sound varies with the vehicle's speed.

The sound stops when the vehicle speed exceeds about 15 mph (25 km/h).

The sound resumes when the vehicle speed falls below about 13 mph (22 km/h).

The sound stops while depressing the brake pedal with the vehicle speed at about 0.3 mph (0.5 km/h) or less, or once about 3 seconds has elapsed even if the brake pedal is not depressed.