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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis >> Body & Frame >> Seats >> Seats - Service Information (3 Of 7) >> REAR SEAT ASSEMBLY (for Power Seat) >> Installation [10/2023 - ] >> Procedure

Installation [10/2023 - ]: Procedure

  1. INSTALL NO. 1 SEAT RECLINING ADJUSTER ASSEMBLY LH 
    1. Temporarily install No. 1 seat reclining adjuster assembly LH with the 4 nuts.
      Fig 1: No. 1 Seat Reclining Adjuster Assembly LH Nuts Tightening Sequence
      GTY778366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Tighten the 4 nuts in the order shown in the illustration and install the No. 1 seat reclining adjuster assembly LH.

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

  2. INSTALL NO. 1 SEAT RECLINING ADJUSTER ASSEMBLY RH 
    1. Temporarily install No. 1 seat reclining adjuster assembly RH with the 4 nuts.
      Fig 2: No. 1 Seat Reclining Adjuster Assembly RH Nuts Tightening Sequence
      GTY775982Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Ottoman
    2. Tighten the 4 nuts in the order shown in the illustration and install the No. 1 seat reclining adjuster assembly RH.

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    3. w/ Ottoman:
      1. Connect the connector.
  3. INSTALL CENTER ROOM PARTITION GARNISH ASSEMBLY 
    1. Attach the clip.
      GTY784308Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Install the center room partition garnish assembly with the 6 nuts.
  4. INSTALL NO. 2 EV BATTERY INTAKE DUCT 

    Refer to PROCEDURE - Step 19

  5. INSTALL ROOM PARTITION BOARD ASSEMBLY LH 
    1. Pass the rear seat outer belt assembly LH and rear center seat outer belt assembly through the room partition board assembly LH.
      GTY807088Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    2. Insert the guide and attach the claw to install the belt guide of the rear seat outer belt assembly LH and rear center seat outer belt assembly.
      GTY829287Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Push in the installation direction shown in the illustration to attach the clip and claw.
      GTY794464Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    4. Install the room partition board assembly LH with the nut.
  6. INSTALL ROOM PARTITION BOARD ASSEMBLY RH 
    1. Pass the rear seat outer belt assembly RH through the room partition board assembly RH.
      GTY785031Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    2. Insert the guide and attach the claw to install the belt guide of the rear seat outer belt assembly RH.
      GTY784500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Push in the installation direction shown in the illustration to attach the clip and claw.
      GTY791708Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    4. Install the room partition board assembly RH with the nut.
  7. INSTALL REAR SEAT SIDE GARNISH LH 

    Refer to PROCEDURE - Step 30

  8. INSTALL REAR SEAT SIDE GARNISH RH 

    HINT: 

    Use the same procedure described for the LH side.

  9. INSTALL REAR DOOR SCUFF PLATE LH 

    Refer to PROCEDURE - Step 38

  10. INSTALL REAR DOOR SCUFF PLATE RH 

    HINT: 

    Use the same procedure described for the LH side.

  11. INSTALL REAR NO. 1 SEAT ADJUSTER ASSEMBLY 
    1. Temporarily install No. 1 rear seat adjuster assembly with the 3 bolts and nut.
      Fig 3: No. 1 Rear Seat Adjuster Assembly Bolts And Nut Tightening Sequence
      GTY777895Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bolt A
      *b Bolt B
      *c Nut
      Connector
    2. Tighten the nuts and bolts in the order shown in the illustration and install the No. 1 rear seat adjuster assembly.

      Bolt A 

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

      Bolt B 

      Torque: 42 N.m (428 kgf/cm, 31 ft.lbf) 

      Nut 

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    3. Connect the connector.
  12. INSTALL REAR NO. 2 SEAT ADJUSTER ASSEMBLY 
    1. Temporarily install No. 2 rear seat adjuster assembly with the 3 bolts and nut.
      Fig 4: No. 2 Rear Seat Adjuster Assembly Bolts And Nut Tightening Sequence
      GTY788814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Bolt A
      *b Bolt B
      *c Nut
    2. Tighten the nuts and bolts in the order shown in the illustration and install the No. 2 rear seat adjuster assembly.

      Bolt A 

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

      Bolt B 

      Torque: 42 N.m (428 kgf/cm, 31 ft.lbf) 

      Nut 

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

  13. INSTALL REAR CENTER SEAT ARMREST ASSEMBLY 
    1. Install the rear seat center armrest assembly with the 2 nuts and 2 bolts.
      GTY796614Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    2. Attach the clip to install the armrest cover.
      GTY784458Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Attach the clamp and install the connector holder.
      GTY836615Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Rear Seat Entertainment System
    4. w/o Rear Seat Entertainment System:
      1. Connect the connector.
    5. w/ Rear Seat Entertainment System:
      1. Connect the 2 connectors.
  14. INSTALL REAR SEATBACK ASSEMBLY LH 
    1. Place the rear seatback assembly LH and attach the clip.
      NOTE:

      Do not damage the rear seatback assembly LH, body and body interior.

      GTY831927Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Push down in the installation direction (1) shown in the illustration and connect the rear seatback assembly LH to the No. 1 seat reclining adjuster assembly LH.
      GTY794361Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction (1)
      Install in this Direction (2)
    3. Press in the installation direction (2) shown in the illustration and connect the rear seatback assembly LH to the No. 2 rear seat adjuster assembly.
    4. Install the 2 nuts.

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    5. Install the wire harness clamp.
      GTY784078Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Connect the 2 connectors.
      GTY799247Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Rear Seat Airbag Assembly LH Connector
      Rear Seat Cushion Airbag Assembly LH Connector
    7. Connect the connector of the rear seat airbag assembly LH.
      1. Before connecting the rear seat airbag assembly LH, check that the CPA is positioned as shown in the illustration.
        GTY826805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a CPA - -
      2. Holding the sides of the CPA of the rear seat airbag assembly LH connector, connect the connector by engaging it until a "click" sound is heard.
        NOTE:
        • Be careful not to damage the rear seat airbag connector and wire harness.
        • When connecting the connector, push the connector straight in.
        • Do not connect the connector while holding components other than the CPA.
        • If the top of the CPA is held down when connecting the connector, the half connection prevention mechanism will not function due to deformation of the CPA. Therefore, hold the sides of the CPA.
    8. Connect the connector of the rear seat cushion airbag assembly LH.
    9. Install the connector holder with the bolt.

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    10. Install the cap to belt band.
      GTY796302Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    11. Attach the belt band.
      GTY821641Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    12. Install the floor anchor of the rear seat outer belt assembly LH with the bolt.

      Torque: 42 N.m (428 kgf/cm, 31 ft.lbf) 

      NOTE:

      When installing, make sure that the body protrusion comes between the location pins of the floor anchor of the rear seat outer belt assembly LH.

      GTY801144Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Body Protrusion
      *b Location Pin
    13. Install the floor anchor of the rear center seat outer belt assembly with the nut.
      GTY835728Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Location

      Torque: 42 N.m (428 kgf/cm, 31 ft.lbf) 

      NOTE:

      The floor anchor of the rear center seat outer belt assembly must not overlap the location.

    14. Check ELR lock:
      1. With the seat belt installed to the vehicle, check that the seat belt locks when it is pulled out quickly.
  15. INSTALL REAR SEATBACK ASSEMBLY RH 
    1. Place the rear seatback assembly RH and attach the clip.
      NOTE:

      Do not damage the rear seatback assembly RH, body and body interior.

      GTY796423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Push down in the installation direction (1) shown in the illustration and connect the rear seatback assembly RH to the No. 1 seat reclining adjuster assembly RH.
      GTY828753Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction (1)
      Install in this Direction (2)
    3. Press in the installation direction (2) shown in the illustration and connect the rear seatback assembly RH to the No. 1 rear seat adjuster assembly.
    4. Install the 2 nuts.

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    5. Install the wire harness clamp.
      GTY830027Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Ottoman
    6. w/o Ottoman
      1. Connect the 4 connectors.
    7. w/ Ottoman
      1. Connect the 5 connectors.
    8. Connect the 2 connectors.
      GTY778889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Rear Seat Airbag Assembly RH Connector
      Rear Seat Cushion Airbag Assembly RH Connector
    9. Connect the connector of the rear seat airbag assembly RH.
      1. Before connecting the rear seat airbag assembly RH, check that the CPA is positioned as shown in the illustration.
        GTY826805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a CPA - -
      2. Holding the sides of the CPA of the rear seat airbag assembly RH connector, connect the connector by engaging it until a "click" sound is heard.
        NOTE:
        • Be careful not to damage the rear seat airbag connector and wire harness.
        • When connecting the connector, push the connector straight in.
        • Do not connect the connector while holding components other than the CPA.
        • If the top of the CPA is held down when connecting the connector, the half connection prevention mechanism will not function due to deformation of the CPA. Therefore, hold the sides of the CPA.
    10. Connect the connector of the rear seat cushion airbag assembly RH.
    11. Install the connector holder with the bolt.

      Torque: 20 N.m (204 kgf/cm, 15 ft.lbf) 

    12. Install the cap to belt band.
      GTY796267Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    13. Attach the belt band.
      GTY815742Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    14. Install the floor anchor of the rear seat outer belt assembly RH with the bolt.

      Torque: 42 N.m (428 kgf/cm, 31 ft.lbf) 

      NOTE:

      When installing, make sure that the body protrusion comes between the location pins of the floor anchor of the rear seat outer belt assembly RH.

      GTY792870Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Body Protrusion
      *b Location Pin
    15. Check ELR lock:
      1. With the seat belt installed to the vehicle, check that the seat belt locks when it is pulled out quickly.
  16. INSTALL REAR SEAT CUSHION LOCK HOOK 

    HINT: 

    Use the same procedure for the other side.

    1. Set a new rear seat cushion lock hook.
    2. Using 2 thin-bladed screwdrivers with their tips wrapped with protective tape, press the sleeve and attach the claw.
      GTY832233Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Sleeve
      *b Protective Tape
      NOTE:

      Do not apply enough force to pierce the sleeve.

    3. Check the installation condition.

      OK

      The sleeve is installed properly.

      GTY782294Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Body *b Vehicle
      *c Sleeve *d Correct
      *e Incorrect - -
  17. INSTALL REAR CENTER SEAT CUSHION ASSEMBLY 
    1. Place the rear center seat cushion assembly in the vehicle.
      NOTE:

      Do not damage the rear center seat cushion assembly, body and body interior.

    2. Attach the wire harness clamp and connect the connector.
      GTY829323Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Push in the installation direction shown in the illustration and attach the hook.
      GTY834073Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    4. Push down in the installation direction shown in the illustration to attach the hook of the rear center seat cushion assembly.
      GTY829973Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
    5. Return the rear center seat lap type belt assembly RH.
      GTY829319Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. INSTALL REAR SEAT CUSHION ASSEMBLY LH 
    1. Place the rear seat cushion assembly LH in the vehicle.
      NOTE:

      Do not damage the rear seat cushion assembly LH, body and body interior.

    2. w/ Refresh Seat:
      1. Attach the claw and connect the joint.
        GTY819114Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        Install in this Direction
      2. Attach the tube clamp.
    3. Attach the clip.
      GTY784081Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Connect the connector and install the wire harness clamp.
      GTY779639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Rear Seat Cushion Airbag Assembly LH Connector
    5. Connect the connector of the rear seat cushion airbag assembly LH.
      1. Before connecting the rear seat cushion airbag assembly LH, check that the CPA is positioned as shown in the illustration.
        GTY826805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a CPA - -
      2. Holding the sides of the CPA of the rear seat cushion airbag assembly LH connector, connect the connector by engaging it until a "click" sound is heard.
        NOTE:
        • Be careful not to damage the rear seat cushion airbag connector and wire harness.
        • When connecting the connector, push the connector straight in.
        • Do not connect the connector while holding components other than the CPA.
        • If the top of the CPA is held down when connecting the connector, the half connection prevention mechanism will not function due to deformation of the CPA. Therefore, hold the sides of the CPA.
    6. Attach the fastening tape.
      GTY817751Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Fastening Tape
      NOTE:

      Align the end of fastening tape.

    7. Push in the removal direction shown in the illustration and attach the hooks.
      GTY783250Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      Install in this Direction
      NOTE:
      • Attach each hook individually.
      • Check that the rear seat cushion lock hooks and rear seat cushion assembly LH are securely fastened.
  19. INSTALL REAR SEAT CUSHION ASSEMBLY RH 

    HINT: 

    Use the same procedure described for the LH side.

  20. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL 

    Refer to PROCEDURE - Step 2

  21. INSTALL LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 13

  22. INITIALIZATION OF SEAT ECU 
    NOTE:

    Perform initialization for both of the front power seat control system and rear power seat control system.

  23. CHECK SRS WARNING LIGHT 

    Refer to OPERATION CHECK [10/2023 - ]

  24. INSPECT REAR SEAT ASSEMBLY 

    Refer to OPERATION CHECK [09/2019 - ]

  25. INSPECT SEAT HEATER SYSTEM 

    Refer to OPERATION CHECK [10/2022 - ]

  26. INSPECT CLIMATE CONTROL SEAT SYSTEM 

    Refer to ON-VEHICLE INSPECTION [10/2022 - ]

  27. INSPECT SEAT VIBRATION SYSTEM (w/ Refresh Seat) 

    Refer to OPERATION CHECK [10/2022 - ]

  28. INSPECT SEAT BELT WARNING SYSTEM 

    Refer to ON-VEHICLE INSPECTION [10/2023 - ]

  29. INITIALIZATION AFTER RECONNECTING AUXILIARY BATTERY TERMINAL 

    Refer to WORK PROCEDURE [10/2022 - ]

    HINT: 

    When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Refer to AUTOMATIC LEARNING CHART [10/2023 - ]

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