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Power Seat Control System: Inspection

  1. INSPECT DRIVER'S POWER SEAT SWITCH CONTINUITY (w/o Driving Position Memory) 

    Slide Switch: 

    CONTINUITY CONDITION

    Switch Position Tester Connection Specified Condition
    FRONT 1 - 9, 4 - 6 Continuity
    OFF 4 - 6 - 9 Continuity
    BACK 1 - 6, 4 - 9 Continuity

    Front Tilt Switch: 

    CONTINUITY CONDITION

    Switch Position Tester Connection Specified Condition
    UP 1 - 10, 4 - 5 Continuity
    OFF 4 - 5 - 10 Continuity
    DOWN 1 - 5, 4 - 10 Continuity

    Rear Lifter Switch: 

    CONTINUITY CONDITION

    Switch Position Tester Connection Specified Condition
    UP 1 - 7, 4 - 8 Continuity
    OFF 4 - 7 - 8 Continuity
    DOWN 1 - 8, 4 - 7 Continuity

    Reclining Switch: 

    CONTINUITY CONDITION

    Switch Position Tester Connection Specified Condition
    FORWARD 1 - 3, 2 - 4 Continuity
    OFF 2 - 3 - 4 Continuity
    REAR 1 - 2, 3 - 4 Continuity

    If continuity is not as specified, replace the switch.

    Fig 1: Identifying Connector Terminals Driver's Power Seat Switch
    G03056804Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT PASSENGER'S POWER SEAT SWITCH CONTINUITY 

    Slide Switch: 

    CONTINUITY CONDITION

    Switch Position Tester Connection Specified Condition
    FRONT 1 - 9, 4 - 6 Continuity
    OFF 4 - 6 - 9 Continuity
    BACK 1 - 6, 4 - 9 Continuity

    Reclining Switch: 

    CONTINUITY CONDITION

    Switch Position Tester Connection Specified Condition
    FORWARD 1 - 3, 2 - 4 Continuity
    OFF 2 - 3 - 4 Continuity
    REAR 1 - 2, 3 - 4 Continuity

    If continuity is not as specified, replace the switch.

    Fig 2: Identifying Connector Terminals Passenger's Power Seat Switch
    G03056805Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT DRIVER'S LUMBAR SUPPORT CONTROL SWITCH CONTINUITY 
    CONTINUITY CONDITION

    Switch Position Tester Connection Specified Condition
    Forward 1 - 2, 3 - 4 Continuity
    OFF 1 - 2, 4 - 5 Continuity
    Release 1 - 3, 4 - 5 Continuity

    If continuity is not as specified, replace the switch.

    Fig 3: Identifying Connector Terminals Driver's Lumbar Support Control Switch
    G03056806Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT SLIDE MOTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
      2. Fig 4: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2 (Motor Turns Clockwise)
      G03056807Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity, check that the motor turns counterclockwise.

      If operation is not as specified, replace the seat adjuster.

  5. INSPECT SLIDE MOTOR PTC THERMISTOR OPERATION 

    ( ): Passenger Side 

    1. Connect the positive (+) lead from the battery to terminal 2 (1), the positive (+) lead from the ammeter to terminal 1 (2) and the negative (-) lead to the battery negative (-) terminal, then move the seat cushion to the rear position.
      2. Fig 5: Connecting (+) Lead From Battery To Terminal 2 (1), (+) Lead From Ammeter To Terminal 1 (2) & Negative (-) Lead To Battery (-) Terminal (Move Seat Cushion To Rear Position)
      G03056808Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Continue to apply voltage, check that current changes to less than 1 ampere within 4 to 90 seconds.
    3. Disconnect the leads from terminals.
    4. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 1 (2) and the negative (-) lead to terminal 2 (1), check that the seat cushion begins to move forwards.
      Fig 6: Connecting (+) Lead From Battery To Terminal 2 (1), (+) Lead From Ammeter To Terminal 1 (2) & Negative (-) Lead To Battery (-) Terminal (Move Seat Cushion To Forward Position)
      G03056809Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the seat adjuster.

  6. INSPECT FRONT TILT MOTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
      2. Fig 7: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2 (Motor Turns Clockwise)
      G03056810Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity, check that the motor turns counterclockwise.

      If operation is not as specified, replace the seat adjuster.

  7. INSPECT FRONT TILT MOTOR PTC THERMISTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1, the positive (+) lead from the ammeter to terminal 2 and the negative (-) lead to the battery negative (-) terminal, then move the seat cushion to the highest position.
    2. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 8: Connecting (+) Lead From Battery To Terminal 1, (+) Lead From Ammeter To Terminal 2 & (-) Lead To Battery (-) Terminal (Move Seat Cushion To Highest Position)
      G03056811Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from the terminals.
    4. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the seat cushion begins to descend.

      If operation is not as specified, replace the seat adjuster.

      Fig 9: Connecting Positive (+) Lead From Battery To Terminal 2 & Negative (-) Lead To Terminal 1 (Seat Cushion Begins To Descend)
      G03056812Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. INSPECT LIFTER MOTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
      2. Fig 10: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2 (Motor Turns Clockwise)
      G03056813Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity, check that the motor turns counterclockwise.

      If operation is not as specified, replace the seat adjuster.

  9. INSPECT LIFTER MOTOR PTC THERMISTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1, the positive (+) lead from the ammeter to terminal 2 and the negative (-) lead to the battery negative (-) terminal, then move the seat cushion to the lowest position.
      2. Fig 11: Connecting (+) Lead From Battery To Terminal 1, (+) Lead From Ammeter To Terminal 2 & (-) Lead To Battery (-) Terminal (Move Seat Cushion To Lowest Position)
      G03056814Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
    3. Disconnect the leads from the terminals.
    4. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1, check that the seat cushion begins to ascend.
      Fig 12: Connecting Positive (+) Lead From Battery To Terminal 2 & Negative (-) Lead To Terminal 1 (Seat Cushion Begins To Ascend)
      G03056815Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the seat adjuster.

  10. INSPECT RECLINING MOTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns clockwise.
      2. Fig 13: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2 (Motor Turns Clockwise)
      G03056816Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity, check that the motor turns counterclockwise.

      If operation is not as specified, replace the seat adjuster.

  11. INSPECT RECLINING MOTOR PTC THERMISTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 2, the positive (+) lead from the ammeter to terminal 1 and the negative (-) lead to the battery negative (-) terminal, then recline the seat back to the most forward position.
      Fig 14: Connecting (+) Lead From Battery To Terminal 2, (+) Lead From Ammeter To Terminal 1 & (-) Lead To Battery Negative (-) Terminal (Recline Seat Back To Most Forward Position)
      G03056817Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
    3. Disconnect the leads from the terminals.
    4. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the seat back begins to fall backward.
      Fig 15: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2 (Seat Back Begins To Fall Backward)
      G03056818Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If operation is not as specified, replace the seat adjuster.

  12. INSPECT LUMBAR SUPPORT MOTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the lumbar support moves to release side.
      Fig 16: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2 (Lumbar Support Moves To Release Side)
      G03056819Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Reverse the polarity, check that the lumbar support moves forward.

      If operation is not as specified, replace the seat adjuster.

      Fig 17: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2 (Lumbar Support Moves Forward)
      G03056820Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. INSPECT LUMBAR SUPPORT MOTOR PTC THERMISTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1 on the lumbar support motor connector and move the lumbar support to front end position.
      Fig 18: Connecting (+) Lead From Battery To Terminal 2 & (-) Lead To Terminal 1 On Lumbar Support Motor Connector Move Lumbar Support To Front End Position
      G03056821Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Continue to apply voltage, check that a circuit breaker operation noise can be heard within 4 to 60 seconds.
    3. Reverse the polarity, check that the lumbar support begins to move to release side within approximately 60 seconds.

      If operation is not as specified, replace the motor.

      Fig 19: Connecting (+) Lead From Battery To Terminal 2 & (-) Lead To Terminal 1 On Lumbar Support Motor Connector Move Lumbar Support To Rear End Position
      G03056822Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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