PARKING ASSIST MONITOR SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Radio Receiver Assembly Displays the image of the area behind the vehicle sent from the rear television camera assembly using the multi-display assembly. The image is combined with the parking assist guide lines that are calculated based on signals from the steering sensor.
    Multi-display Assembly Receives visual signals composed of the area behind the vehicle with parking assist guide lines overlaid from the radio receiver assembly, and displays them on the multi-display assembly.
    Rear Television Camera Assembly Captures images of the area behind the vehicle and outputs visual signals to the radio receiver assembly.
    Steering Sensor Detects the angle of the steering wheel and sends the resulting signals to the radio receiver assembly.
    Shift Lever Position Sensor Transmits the shift position signal to the hybrid vehicle control ECU assembly.
    Hybrid Vehicle Control ECU Assembly Transmits the shift position signal to the radio receiver assembly.
    Skid Control ECU Assembly Sends the wheel speed signal to the radio receiver assembly.
    Network Gateway ECU* Transmits data between the CAN V bus and CAN sub bus 2.
    Clearance Warning ECU Assembly* Sends clearance sonar detection information to the radio receiver assembly.
    Luggage Compartment Door Lock Assembly Sends the luggage door courtesy switch signal to the main body ECU (multiplex network body ECU).
    Main Body ECU (Multiplex Network Body ECU) Transmits the luggage door courtesy switch signal to the radio receiver assembly.

    *: Models with Lexus parking assist-sensor system

  2. SYSTEM CONTROL


    1. The parking assist monitor system operates when both of the following conditions are met:


      • The power switch is on (IG).

      • The shift lever is in R.

  3. FUNCTION


    1. Area Displayed on Screen


      1. Objects on the right of the vehicle appear on the right side of the multi-display assembly, and objects on the left of the vehicle appear on the left side of the multi-display assembly.

      2. The rear television camera assembly uses a wide-angle lens. The perceived distance from images that appear on the screen differs from the actual distance.

        A001ZS7C01
        *a The illustrations shown are examples only. The illustrations may differ from the actual vehicle screens. - -

        Note

        The area displayed on the screen may vary according to vehicle status or road conditions. The area covered by the rear television camera assembly is limited. The rear television camera assembly does not show objects close to either corner of the bumper or show the area under the bumper.

    2. Warning Message


      1. A warning message appears at the bottom or center of the screen under the following conditions. The warning message appears in the same language that has been selected by the language selector of the multi-display assembly.

        Messages Appearing at Bottom of Screen
        Warning Message Condition
        Check surroundings for safety. This message always appears during system operation.
        System initializing. This message appears when the steering wheel is operated while the battery terminal (-) is disconnected and then the terminal is reconnected.
        Guidance unavailable. This message appears if there is a malfunction in this system.
        Message Appearing at Center of Screen
        Warning Message Condition
        System not ready. This message appears if the system is not initialized.

    3. Calibration Following Parts Replacement


      • The items listed below must always be adjusted whenever one of the following conditions occurs. For details, refer to the Repair Manual.

        Adjustment Items Condition
        Neutral steering point in memory System initializing is displayed.
        Steering angle setting

        • After the spiral cable sub-assembly or steering sensor is removed and installed or after a connector is disconnected and reconnected, system initializing is displayed.

        • Steering sensor replacement.
        Backing-up camera position setting

        • Vehicle height has changed due to replacement of suspension parts or tires.

        • The installation angle of the rear television camera assembly has changed.
        Parking assist monitor system initialization Radio receiver assembly is replaced.

  4. FAIL-SAFE


    1. The table below indicates the malfunction detection items for the components in this system.

      Malfunctioning Parts Detection Item Function
      Steering Sensor

      • Sensor malfunction is detected

      • Sensor open circuit signal is detected

      • Communication malfunction between the steering sensor and radio receiver assembly

      		 Displays "Guidance unavailable"
      Neutral steering point correction incomplete signal is detected Displays "System initializing"
      Rear Television Camera Assembly Camera malfunction signal is detected Stops signal reception and displays a dark screen
      Radio Receiver Assembly Malfunction of radio receiver assembly Stops system operation

  5. DIAGNOSIS


    1. The radio receiver assembly is equipped with a diagnosis function which can display a diagnosis menu for the parking assist monitor system. The method for entering the diagnosis menu screen is the same as the method used for the multi-display assembly. For details, refer to the Repair Manual.