LEXUS PARKING ASSIST-SENSOR SYSTEM SYSTEM DESCRIPTION


  1. GENERAL


    1. This system uses ultrasonic sensors to detect any obstacles at the corners and the rear of the vehicle. The system then informs the driver of the distance between the sensors and the obstacles as well as their positions by indicating them on the display and navigation module display or multi-information display and by sounding a buzzer.

  2. FUNCTION OF COMPONENTS

    Component Function
    Ultrasonic Sensor (6) Detects the distance between the vehicle and the obstacle
    Clearance Warning Buzzer Sounds the buzzer to inform the driver according to the distance to the obstacle
    Multi-information Display on the Combination Meter

    Displays the location of the obstacle and the approximate distance between the vehicle and the obstacle

    Displays a malfunction or freezing of the ultrasonic sensor to inform the driver

    The multi-information display is switched to the multi-switch mode by the satellite switch operation. Then, LEXUS parking assist-sensor system ON/OFF condition will be displayed
    LEXUS Parking Assist Sensor Indicator Light on the Combination Meter Illuminates to inform the driver when the system operation conditions are met
    Satellite Switch (Clearance Sonar Main Switch) Operating this switch enables, disables or cuts off the operation of LEXUS parking assist-sensor system
    Display and Navigation Module Display*1

    Displays the location of the obstacle and the approximate distance between the vehicle and the obstacle

    The sound volume and sounding distance of the buzzer and display requirement distance can be set on the setup screen for the LEXUS parking assist-sensor system
    Clearance Warning ECU

    Judges the approximate distance between the vehicle and the obstacle based on the signals from the ultrasonic sensors and sends it to the multi-information display and display and navigation module display

    Sounds the buzzer
    Main Body ECU LH Transmits the reverse signal to the clearance warning ECU
    Main Body ECU RH Transmits the parking brake switch signal to the clearance warning ECU
    ECM Transmits the shift position signal to the clearance warning ECU

    *1: w/ Navigation System

  3. OPERATION EXPLANATION


    1. The operating condition of each ultrasonic sensor differs according to the installation position as shown in the table bellow.

      Installation Position Operating Condition
      Front Corner Sensor

      Engine switch on (IG)

      Satellite switch (clearance sonar main switch) is ON

      Shift position is except P

      Vehicle speed is approx. 6 mph (10 km/h) or less
      Rear Corner Sensor

      Engine switch on (IG)

      Satellite switch (clearance sonar main switch) is ON

      Shift position is R

      Vehicle speed is approx. 6 mph (10 km/h) or less
      Rear Center Sensor

      Engine switch on (IG)

      Satellite switch (clearance sonar main switch) is ON

      Shift position is R

    2. The LEXUS parking assist-sensor system then informs the driver of the distance between the sensors and the obstacles as well as their positions by displaying them on the multi-information display in the combination meter or display and navigation module display and by sounding buzzer.