2013 Toyota Tundra CrewMax Owners Manual - Page 193

2-4. Using other driving systems Front corner sensors Zone Distance shown as in in. (mm) Approximately 23.6 - 15.7 (600 - 400) Approximately 15.7 - 9.8 (400 - 250) Approximately 9.8 (250) or less Indicator and buzzer Far Intermittent Mid Fast intermittent 2 When driving Near Continuous