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Front Power Seat Control System: Inspection

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT FRONT POWER SEAT SWITCH 
    1. Inspect the driver side front power seat switch assy.
      1. Measure the resistance between the terminals when each switch is operated.
      Fig 1: Inspecting Driver Side Front Power Seat Switch LH
      G02606929Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Slide switch 

      DRIVER SIDE FRONT POWER SEAT SWITCH (SLIDE SWITCH)

      Tester Connection Switch Operation Specified Condition
      1 (B) - 9 (SLDF) FRONT Below 1 Ω
      4 (E) - 6 (SLDR) FRONT Below 1 Ω
      4 (E) - 6 (SLDR) OFF Below 1 Ω
      4 (E) - 9 (SLDF) OFF Below 1 Ω
      1 (B) - 6 (SLDR) REAR Below 1 Ω
      4 (E) - 9 (SLDF) REAR Below 1 Ω

      Front vertical switch 

      DRIVER SIDE FRONT POWER SEAT SWITCH (FRONT VERTICAL SWITCH)

      Tester Connection Switch Operation Specified Condition
      1 (B) - 10 (FUP) UP Below 1 Ω
      4 (E) - 5 (FDWN) UP Below 1 Ω
      4 (E) - 5 (FDWN) OFF Below 1 Ω
      4 (E)- 10 (FUP) OFF Below 1 Ω
      1 (B) - 5 (FDWN) DOWN Below 1 Ω
      4 (E)- 10 (FUP) DOWN Below 1 Ω

      Lifter vertical switch 

      DRIVER SIDE FRONT POWER SEAT SWITCH (LIFTER VERTICAL SWITCH)

      Tester Connection Switch Operation Specified Condition
      1 (B) - 7 (LUP) UP Below 1 Ω
      4 (E) - 8 (LDWN) UP Below 1 Ω
      4 (E) - 7 (LUP) OFF Below 1 Ω
      4 (E) - 8 (LDWN) OFF Below 1 Ω
      1 (B) - 8 (LDWN) DOWN Below 1 Ω
      4 (E) - 7 (LUP) DOWN Below 1 Ω

      Reclining switch 

      DRIVER SIDE FRONT POWER SEAT SWITCH (RECLINING SWITCH)

      Tester Connection Switch Operation Specified Condition
      1 (B) - 3 (RCLF) FRONT Below 1 Ω
      2 (RCLR) - 4 (E) FRONT Below 1 Ω
      2 (RCLR) - 4 (E) OFF Below 1 Ω
      3 (RCLF) - 4 (E) OFF Below 1 Ω
      1 (B) - 2 (RCLR) REAR Below 1 Ω
      3 (RCLF) - 4 (E) REAR Below 1 Ω

      If the result is not as specified, replace the switch.

    2. Inspect the front passenger side front power seat switch assy.
      1. Measure the resistance between the terminals when each switch is operated.
      Fig 2: Measuring Resistance Between Terminals Of Front Power Seat Switch RH
      G02606930Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      Slide switch 

      FRONT PASSENGER SIDE FRONT POWER SEAT SWITCH (SLIDE SWITCH)

      Tester Connection Switch Operation Specified Condition
      1 (B) - 9 (SLDF) FRONT Below 1 Ω
      4 (E) - 6 (SLDR) FRONT Below 1 Ω
      4 (E) - 6 (SLDR) OFF Below 1 Ω
      4 (E) - 9 (SLDF) OFF Below 1 Ω
      1 (B) - 6 (SLDR) REAR Below 1 Ω
      4 (E) - 9 (SLDF) REAR Below 1 Ω

      Reclining switch 

      FRONT PASSENGER SIDE FRONT POWER SEAT SWITCH (RECLINING SWITCH)

      Tester Connection Switch Operation Specified Condition
      1 (B) - 3 (RCLF) FRONT Below 1 Ω
      2 (RCLR) - 4 (E) FRONT Below 1 Ω
      2 (RCLR) - 4 (E) OFF Below 1 Ω
      3 (RCLF) - 4 (E) OFF Below 1 Ω
      1 (B) - 2 (RCLR) REAR Below 1 Ω
      3 (RCLF) - 4 (E) REAR Below 1 Ω

      If the result is not as specified, replace the switch.

  2. INSPECT POWER SEAT SWITCH 
    1. Inspect the lumber support switch assy.
      1. Measure the resistance between the terminals when each switch is operated.
      Fig 3: Measuring Resistance Of Power Seat Switch
      G02606931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

    LUMBER SUPPORT SWITCH

    Tester Connection Switch Operation Specified Condition
    1 (R) - 2 (E2) HOLD switch pushed Below 1 Ω
    3 (B) - 4 (H) HOLD switch pushed Below 1 Ω
    1 (R) - 2 (E2) Off Below 1 Ω
    4 (H) - 5 (E1) Off Below 1 Ω
    1 (R) - 3 (B) RELEASE switch pushed Below 1 Ω
    4 (H) - 5 (E1) RELEASE switch pushed Below 1 Ω

    If the result is not as specified, replace the switch.

  3. INSPECT FRONT SEAT ADJUSTER ASSY LH 
    1. Check slide motor operation.
      1. Check if the motor rotates smoothly when the battery is connected to the slide motor connector terminals.
      Fig 4: Checking Slide Motor Operation
      G02606933Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      Fig 5: Sliding Motor Operation Table
      G02606932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the front seat adjuster assy LH.

    2. Check front vertical motor operation.
      1. Check if the motor rotates smoothly when the battery is connected to the front vertical motor connector terminals.
        Fig 6: Checking Front Vertical Motor Operation
        G02606935Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        OK: 

        Fig 7: Front Vertical Motor Operation Table
        G02606934Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        If the result is not as specified, replace the front seat adjuster assy LH.

    3. Check lifter motor operation.
      1. Check if the motor rotates smoothly when the battery is connected to the lifter motor connector terminals.
      Fig 8: Checking Lifter Motor Operation
      G02606937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      Fig 9: Lifter Motor Operation Table
      G02606936Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the front seat adjuster assy LH.

    4. Check reclining motor operation.
      1. Check if the motor rotates smoothly when the battery is connected to the reclining motor connector terminals.
      Fig 10: Checking Reclining Motor Operation
      G02606939Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

    Fig 11: Reclining Motor Operation Table
    G02606938Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the front seat adjuster assy LH.

  4. INSPECT FRONT SEAT ADJUSTER ASSY RH 
    1. Check slide motor operation.
      1. Check if the motor rotates smoothly when the battery is connected to the slide motor connector terminals.
      Fig 12: Checking Slide Motor Operation
      G02606941Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      Fig 13: Sliding Motor Operation Table
      G02606940Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If the result is not as specified, replace the front seat adjuster assy RH.

    2. Check reclining motor operation.
      1. Check if the motor rotates smoothly when the battery is connected to the reclining motor connector terminals.
      Fig 14: Checking Reclining Motor Operation
      G02606943Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

    Fig 15: Reclining Motor Operation Table
    G02606942Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the front seat adjuster assy RH.

  5. INSPECT LUMBAR SUPPORT ADJUSTER ASSY LH 
    1. Check lumbar support motor operation.
      1. Check if the motor rotates smoothly when the battery is connected to the lumbar support motor connector terminals.
      Fig 16: Checking Lumbar Support Motor Operation
      G02606945Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

    Fig 17: Lumbar Support Motor Operation Table
    G02606944Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If the result is not as specified, replace the lumber support adjuster assy LH.

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