2007 Lexus IS 250 Navigation Manual - Page 258
2007 Lexus IS 250 Manual
Page 258 highlights
IS350/250_Navi_U (L/O 0607) 258 LEXUS PARKING ASSIST- SENSOR - Detection range of sensors The Lexus parking assist-sensor may not work properly in the following cases: D When the bumper is damaged. D When the part near the sensors is subjected to a strong impact. D When an accessory is installed within the sensor detection range. D When snowflakes or mud gets on the sensors. (If removed, the parking assist-sensor will work properly.) D When water is splashed from a high pressure car wash or steam on the sensors. D When a sensor is covered with your hand. D When the vehicle is tilted. D In extreme hot or cold weather (In extreme cold weather, the error display appears and the parking assistsensor becomes inoperative.) D When driving on bumpy roads, slopes, gravelled roads or grass. D Devices issuing ultrasonic waves are operated around your vehicle, such as a horn from another vehicle, motorcycle engine, air braking sound from heavy-duty vehicles. " 1 About 1.5 ft. (50 cm) 2 About 1.5 ft. (50 cm) 3 About 4.5 ft. (150 cm) 4 About 1.5 ft. (50 cm) The sensor detection range is limited around the bumper. Be sure to confirm a safe distance around your vehicle and drive slowly. The range of the sensors may change depending on the shape of the object etc..