2006 Lexus IS 350 Navigation Manual - Page 260

IS350/250_Navi_U (L/O 0508) 260 LEXUS PARKING ASSIST −SENSOR (a) When snowflakes or mud gets on the sensors (b) When the sensor is malfunctioning " 1 Multi−information display 2 Touch screen If foreign matter gets on the sensors and the parking assist−sensor cannot detect the object properly, the above message appears. At this time, the vehicle symbol and the indicator bars corresponding to the faulty sensors flash for about 7 seconds and 2 beeps sound 5 times. After about 7 seconds, the sensor indicator bars will cease flashing, however will stay lit until the affected sensor is cleaned. Furthermore, the vehicle symbol will continue to flash until the affected sensor is cleaned. The above illustration shows the sensor on the left front of the vehicle malfunctioning. If the failure warning does not go off even after the foreign matter is removed, the parking assist−sensor may be malfunctioning. Have it checked by your Lexus dealer. " 1 Multi−information display 2 Touch screen If the sensor cable is broken and the parking assist−sensor cannot detect the object properly, the above message appears. At this time, the indicator bars corresponding to the faulty sensor flash for about 7 seconds and 2 beeps sound 5 times. The indicator bars continue lighting after flashing. The above illustration shows the sensor on the right rear of the vehicle malfunctioning. If this message appears, have the parking assist−sensor checked by your Lexus dealer.