2009 Toyota Sienna Owners Manual - Page 238

2-4. Using other driving systems The indicator and buzzer system n Corner sensor operation and distance to an obstacle The system operates when the vehicle approaches within following distance to an obstacle. The indicator flashes and the buzzer sounds when the system is operating. Front (if equipped) ft. (cm) Distance to an obstacle Approximately 2.0 - 1.3 (60 - 40) Approximately 1.3 - 0.8 (40 - 25) Approximately 0.8 or less (25 or less) Indicator and buzzer Intermittent Fast intermittent Continuously Rear ft. (cm) Distance to an obstacle Approximately 2.8 - 1.7 (85 - 52) Approximately 1.7 - 0.8 (52 - 25) Approximately 0.8 or less (25 or less) Indicator and buzzer Intermittent Fast intermittent Continuously 210