SEAT VIBRATION SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Multi Display (Driver Seat Refresh Switch and Passenger Seat Refresh Switch)

    • Sends operation switch signals to the pneumatic valve control ECU.

    • An indicator light shown on the display can be used to confirm the setting status of the front refresh seat system.
    Rear Multi Operation Panel (Rear Left Seat Relaxation Switch / Rear Right Seat Relaxation Switch)

    • Sends operation switch signals to the pneumatic valve control ECU.

    • Enables the user to confirm the setting status of the rear thermal sensing relaxation seat system with the indicator light displayed on the panel.
    Lumbar Support Pump SUB-ASSY RH/LH

    • Transmits the air pressure to the seatback main stretcher cushion assembly and seat cushion main stretcher cushion assembly according to signals from the pneumatic valve control ECU.

    • Makes it possible to adjust the air pressure and the contraction interval speed to one of 3 levels for the seatback main stretcher cushion assembly and seat cushion main stretcher cushion assembly.
    Position Control ECU Assembly No.2/RH/LH Sends switch signals from the multi display and rear multi operation panel to each pneumatic valve control ECU via LIN communication.
    Three-way Solenoid Valve Built into the pneumatic valve control ECU and controls the supply and release of air sent by valves to the bladders, based on valve on/off signals.
    Pneumatic Valve Control ECU

    • Controls the pneumatic system

    • Sends operation signals to valves based on switch signals from each position control ECU.
    RH Seat Check Valve (with Hose) and LH Seat Check Valve (with Hose) Prevents the reverse flow of air from the support system.
    Seatback Main Stretcher Cushion Assembly

    • Located within both the front seatbacks and rear seatbacks; 10*are provided for each seatback (4 in each rear seatback are linked with thermal sensing heaters).

    • Expands and contracts due to air pressure from the pump.
    Seat Cushion Main Stretcher Cushion Assembly

    • Built into the front seat cushions and rear seat cushions; there are 8 in each front seat cushion and 6 in each rear seat cushion.

    • Expands and contracts due to air pressure from the pump.

    *: 8 for models with folding headrests

  2. SYSTEM CONTROL


    1. The pneumatic valve control ECU controls the pneumatic system. The pneumatic valve control ECU receives switch signals from the multi display or rear multi operation panel, operates pumps, and turns the three-way solenoid valve on and off.

    2. The duty ratio of the pump is changed to make it possible to adjust the air pressure the pump applies to the pneumatic chamber at 5 levels.

    3. A power timer function is provided in the pneumatic control ECU to prevent operation when the user forgets to turn the pneumatic system off.

    4. The pneumatic valve control ECU automatically stops the pump and valve after approximately 15 minutes have passed since operation began, releases air pressure from the pumps and bladders via the three-way solenoid valve, and turns the pneumatic system off.

      Front Refresh Seat
      Function Content
      Full Body Centripetal Mode that operates the bladders from the ends of the body towards the heart (from bottom to top).
      Centrifugal Mode that operates the bladders from the heart towards the end of the body (from top to bottom).
      Parts of Body Upper Body Activates the 2 adjacent bladders in the area from the lower part of the seatback (waist) to seat cushion.
      Lower Body Activates the 2 adjacent bladders inside the seatback.
      Lumbar Activates the 2 adjacent bladders inside the lower part of the front seatback (lower back).
      Rear Refresh Seat
      Function Content
      Full Body Refresh Mode to activate the bladders and perform refresh operations.
      Stretch Mode that activates the bladders to perform operations that simulate stretching.
      Simple Mode that activates only by pressing the body left and right simultaneously.
      Parts of Body Upper Body Activates the 2 adjacent bladders in the area from the lower part of the seatback (waist) to seat cushion.
      Lower Body Activates the 2 adjacent bladders inside the seatback.
      Shoulder Activates the 2 adjacent bladders inside the upper part of the rear seatback (shoulders).
      Lumbar Activates the 2 adjacent bladders inside the lower part of the rear seatback (lower back).

  3. DIAGNOSIS


    1. In order to make system inspections easier to perform, a diagnosis function is used in consideration of serviceability. The Diagnostic Trouble Codes (DTCs) of malfunctions can be read by connecting the TechStream. For details, refer to the Repair Manual.