2010 Toyota 4Runner Owners Manual - Page 239

2-4. Using other driving systems Detection range of the sensors Approximately 1.6 ft. (50 cm) Approximately 4.9 ft. (150 cm) The diagram shows the detection range of the sensors. Note that the sensors cannot detect obstacles that are extremely close to the vehicle. The range of the sensors may change depending on the shape of the object etc. 2 When driving