TOYOTA PARKING ASSIST-SENSOR SYSTEM(w/ Simple Intelligent Parking Assist 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 an obstacle as well as their positions by indicating them on the multi-information display (in the combination meter assembly), and by sounding a buzzer.

  2. FUNCTION OF COMPONENTS

    Component Function

    • Front Side Ultrasonic Sensor

    • Front Center Ultrasonic Sensor

    • Front Corner Ultrasonic Sensor

    • Rear Side Ultrasonic Sensor

    • Rear Center Ultrasonic Sensor

    • Rear Corner Ultrasonic Sensor

    		 Detects the distance between the vehicle and an obstacle

    • No. 1 Clearance Warning Buzzer

    • No. 2 Clearance Warning Buzzer

    		 Sounds to inform the driver according to the distance to an obstacle
    Multi-information Display (on Combination Meter Assembly)

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

    • Displays a malfunction of the ultrasonic sensor to inform the driver
    Clearance Sonar Indicator (on Combination Meter Assembly) Illuminates to inform the driver while the TOYOTA parking assist-sensor system power is on (the ignition switch is ON and the TOYOTA parking assist-sensor system is on)
    Combination Meter Assembly Transmits the ON/OFF signal to the clearance warning ECU assembly
    Skid Control ECU (Brake Actuator Assembly)

    • Transmits the vehicle speed signal to the clearance warning ECU assembly

    • Transmits an each wheel speed pulse integrated value signal to the clearance warning ECU assembly

    • Transmits the parking brake state signal to the clearance warning ECU assembly*1
    Steering Pad Switch Assembly (Multi-information Switch) Enables, disables or cuts off the operation of the TOYOTA parking assist-sensor system by transmitting the switch operation signal to the combination meter assembly
    Clearance Warning ECU Assembly

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

    • Judges the approximate distance between the vehicle and an obstacle based on the signals from the ultrasonic sensors and sounds the buzzer
    Main Body ECU (Multiplex Network Body ECU)*1 Transmits the parking brake switch signal to the clearance warning ECU assembly
    Spiral Cable with Sensor Sub-assembly Transmits the steering angle signal to the clearance warning ECU assembly
    ECM

    • Transmits the shift position signal to the clearance warning ECU assembly*2

    • Transmits the transmission information signal to the clearance warning ECU assembly
    Air Conditioning Amplifier Assembly Transmits the temperature information to the clearance warning ECU assembly
    Airbag Sensor Assembly Transmits the G sensor signal to the clearance warning ECU assembly

    • *1: for Manual Transaxle

    • *2: for CVT

  3. OPERATION EXPLANATION


    1. The operating conditions of each ultrasonic sensor differ according to the installation position as shown in the table below.

      Installation Position Operating Condition
      Front Corner/Center

      • Ignition switch is ON.

      • TOYOTA parking assist-sensor system is on.

      • Parking brake is not applied*1

      • Shift lever is in R or other than R.*1

      • Shift lever is in any position other than P or R.*2

      • Vehicle speed is approximately 10 km/h (6 mph) or less.

      • Ignition switch is ON.

      • TOYOTA parking assist-sensor system is on.

      • Shift lever is in R.
      Front Side

      • Ignition switch is ON.

      • TOYOTA parking assist-sensor system is on.

      • Parking brake is not applied*1

      • Shift lever is in R or other than R.*1

      • Shift lever is in any position other than P.*2

      • Steering wheel is turned approximately 90° or more.

      • Vehicle speed is approximately 10 km/h (6 mph) or less.

      • Ignition switch is ON.

      • TOYOTA parking assist-sensor system is on.

      • Shift lever is in R.
      Rear Corner/Center

      • Ignition switch is ON.

      • TOYOTA parking assist-sensor system is on.

      • Shift lever is in R.
      Rear Side

      • Ignition switch is ON.

      • TOYOTA parking assist-sensor system is on.

      • Parking brake is not applied*1

      • Shift lever is in R or other than R.*1

      • Shift lever is in any position other than P.*2

      • Steering wheel is turned approximately 90° or more.

      • Vehicle speed is approximately 10 km/h (6 mph) or less.

      • Ignition switch is ON.

      • TOYOTA parking assist-sensor system is on.

      • Shift lever is in R.

      • *1: for Manual Transaxle

      • *2: for CVT

      When the system operates, the clearance warning ECU assembly transmits ultrasonic waves from the ultrasonic sensors. If these waves encounter an obstacle within one or more of the sensors ranges, the waves are reflected back to the sensors, which transmit them to the clearance warning ECU assembly.

      Based on this information, the clearance warning ECU assembly sends signals the combination meter assembly and the clearance warning buzzers. The approximate distance between the vehicle and the obstacle is then indicated, and the buzzer sounds.

      Tech Tips

      Refer to Detection Range Measurement and Display Inspection.

      Click here

    2. Side sonar display and buzzer system description


      1. When the ultrasonic sensors (side sonar) detect an obstacle, the distance between the obstacle and the vehicle is calculated and it is determined if the obstacle is in the path of the vehicle.

        A005PNFC01
        *a 60 mm (2.4 in) diameter pole - -

      2. If the obstacle is determined to be in the path of the vehicle, notifications are displayed and the buzzer sounds.

        A005Q23C01
        *a 60 mm (2.4 in) diameter pole *b Steering wheel turned 90° or more