PARKING ASSIST MONITOR SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Rear Television Camera Assembly

    • Captures images of the area behind the vehicle.

    • The parking assist guide lines that are calculated based on signals from the steering sensor are superimposed on the captured image. Then, the image is sent to the multi-display assembly as video signals.

    • When the back door is open, superimposing of parking assist guide lines is canceled and only the captured image is sent as video signals.
    Multi-display Assembly Receives visual signals composed of the area behind the vehicle with parking assist guide lines overlaid from the rear television camera assembly, and displays them.
    Radio Receiver Assembly Sends signals indicating a mode change in parking guide line display functions to the rear television camera assembly.
    Steering Sensor Detects the direction and angle of the steering wheel and sends the resulting signals to the rear television camera assembly.
    Park/Neutral Position Switch Assembly Sends an R shift position signal to the multi-display assembly*1 and ECM.
    ECM Sends an R shift position signal to the rear television camera assembly.
    Back Door Lock Assembly Back Door Courtesy Light Switch

    • Detects the back door condition (open or closed).

    • Sends the back door courtesy switch signal to the main body ECU (multiplex network body ECU)*2 or power back door ECU (multiplex network door ECU)*3.
    Main Body ECU (Multiplex Network Body ECU) Transmits the back door courtesy switch signal to the rear television camera assembly.
    Power Back Door ECU (Multiplex Network Door ECU)*3 Transmits the back door courtesy switch signal to the main body ECU (multiplex network body ECU).
    Clearance Warning ECU Assembly*4 Sends a Lexus parking assist-sensor system information signal to the rear television camera assembly.
    Blind Spot Monitor Sensor LH*5 Sends a blind spot monitor system (RCTA function) information signal to the rear television camera assembly.
    Combination Meter Assembly Sends the vehicle speed signal to the radio receiver assembly.
    Remote Touch (Remote Operation Controller Assembly) Sends operation signals to the radio receiver assembly.
    Central Gateway ECU (Network Gateway ECU) Relays the signal between the CAN communication lines.

    *1: Models with display audio system or models without Lexus parking assist-sensor system

    *2: Models without power back door system

    *3: Models with power back door system

    *4: Models with Lexus parking assist-sensor system

    *5: Models with blind spot monitor system

  2. OPERATING CONDITION


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


      • The engine switch is on (IG).

      • The shift lever is in R.

  3. SYSTEM CONTROL


    1. The rear television camera assembly combines guide lines and an image to the rear of the vehicle captured and outputs a video signal to the multi-display assembly.

    2. 2 types of screen modes are provided: rear view mode and wide rear view mode. Rear view mode helps the safety confirmation when parking. Wide rear view mode helps the safety confirmation in left and right directions during start-off using the wide visible area.

    3. Estimated course line display mode, parking assist guide line display mode and distance guide line display mode are provided for guide line display mode.

      Guide Line Display Mode List
      Guide Line Display Mode Outline
      Estimated Course Line Display Mode Estimated course lines are displayed which move in accordance with the operation of the steering wheel.
      Parking Assist Guide Line Display Mode The steering wheel return points (parking assist guide line) are displayed.
      Distance Guide Line Display Mode Distance guide lines only are displayed.

      Figure 1. Rear View Mode

      B008G2GE01

      Tech Tips

      The illustration shown is an example only. The illustration may differ from the actual vehicle screen.

      Figure 2. Wide Rear View Mode

      B008G1OE01

      Tech Tips

      The illustration shown is an example only. The illustration may differ from the actual vehicle screen.

      Rear View Mode/Wide Rear View Mode Screen Display Contents List
      No. Item Description
      (1) RCTA Icon* If a vehicle in the rear side direction detected when the blind spot monitor system (RCTA function) is activated, the RCTA icon is displayed.
      (2) Vehicle Width Guide Line (Blue) Indicates the estimated vehicle width.
      (3) Display Mode Switching Button The rear view mode and the wide rear view mode are switched.
      (4) Distance Guide Line (Blue) Indicates a position on the ground approximately 0.5 m (1.6 ft.) behind the rear bumper.
      (5) Guide Line Switching Button Select to switch the guide line mode.
      (6) Distance Guide Line (Red) Moves together with estimated course lines in sync with the steering wheel. The center of the line indicates a position on the ground approximately 0.5 m (1.6 ft.) behind the rear bumper.
      (7) Distance Guide Line (Yellow) Moves together with estimated course lines in sync with the steering wheel. The center of the line indicates a position on the ground approximately 1.0 m (3.3 ft.) behind the rear bumper.
      (8) Estimated Course Line (Yellow) Moves in sync with the steering wheel to indicate the estimated reverse course of the vehicle.
      (9) Parking Assist Guide Line (Blue) Indicates the path the vehicle will follow if the driver turns the steering wheel fully.
      (10) Vehicle Center Guide Line (Blue) Indicates the estimated position on the ground of the center of the vehicle.

      *: Models with blind spot monitor system


      1. Estimated Course Line Display Mode


        • The estimated course lines inform the driver of the steering angle when driving in reverse. By driving the vehicle in reverse while steering to match the estimated course lines with the parking space boundary line, the vehicle can be guided into the parking space.

        • The vehicle width guide lines can be used to determine whether the vehicle is parked straight in the parking space by confirming whether the parking space boundary line and vehicle width extension lines are crossed or parallel.

          B008G1FC01
          *a Vehicle Width Guide Line *b Estimated Course Line
          *c Painted Line of the Parking Space - -

      2. Parking Assist Guide Line Display Mode


        • The parking assist guide lines inform the driver of a part outside of the estimated course lines when the steering wheel is fully turned while driving in reverse. By driving the vehicle in reverse to the desired parking position that matches the parking guide lines with the parking space boundary line, sides of the road, etc., the vehicle can be guided to an appropriate position to start turning the steering wheel.

          Figure 3. Perpendicular Parking

          B008GA5C01
          *a Parking Assist Guide Line *b Painted Line of the Parking Space

          Figure 4. Parallel Parking

          B008G3LC01
          *a Parking Assist Guide Line *b Shoulder and Parking Space Lines, etc.

  4. DIAGNOSIS


    1. The rear television camera is equipped with a diagnosis function. For details, refer to the Repair Manual.