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 multi-display assembly (w/ Multi-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 Combination Meter Assembly

    • 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
    Clearance Sonar Indicator Light on Combination Meter Assembly 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 ultrasonic sensor
    Multi-media Module Receiver Assembly*1

    • Receives the ultrasonic sensor information and sends it to the multi-display assembly

    • Transmits the customize information on the multi-display assembly to the clearance warning ECU
    Multi-display Assembly*1 Receives the video signals from the multi-media module receiver assembly and displays them on the display panel.
    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 multi-media module receiver assembly*1

    Sounds the buzzer
    ECM Transmits the shift position signal to the clearance warning ECU

    *1: w/ Multi-display

  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 lever in any position other than 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 lever in 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 lever in R

    2. The ultrasonic sensors 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 multi-display assembly (w/ Multi-display) and by sounding buzzer.