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Power Seat Control System: Inspection

  1. INSPECT DRIVER'S POWER SEAT SWITCH CONTINUITY 

    Slide Switch: 

    CONTINUITY INSPECTION

    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 INSPECTION

    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 INSPECTION

    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 INSPECTION

    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: Inspecting Driver's Power Seat Switch Continuity
    G02928135Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT PASSENGER'S POWER SEAT SWITCH CONTINUITY 

    Slide Switch: 

    CONTINUITY INSPECTION

    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 INSPECTION

    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: Inspecting Passenger's Power Seat Switch Continuity
    G02928136Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT DRIVER'S LUMBAR SUPPORT SWITCH CONTINUITY 
    Fig 3: Inspecting Driver's Lumbar Support Switch Continuity
    G02928137Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CONTINUITY INSPECTION

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

    If continuity is not as specified, replace the switch.

  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. Reverse the polarity, check that the motor turns counter clockwise.

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

    Fig 4: Inspecting Slide Motor Operation
    G02928138Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT SLIDE MOTOR PTC THERMISTOR OPERATION 
    1. (): 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. Continue to apply voltage, check that current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 5: Inspecting Slide Motor PTC Thermistor, Operation (1 Of 2)
      G02928139Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.

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

    Fig 6: Inspecting Slide Motor PTC Thermistor Operation (2 Of 2)
    G02928140Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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. Reverse the polarity, check that the motor turns counter clockwise.

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

    Fig 7: Inspecting Front Tilt Motor Operation
    G02928141Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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: Inspecting Front Tilt Motor PTC Thermistor Operation (1 Of 2)
      G02928142Courtesy 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: Inspecting Front Tilt Motor PTC Thermistor Operation (2 Of 2)
    G02928143Courtesy 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. Reverse the polarity, check that the motor turns counter clockwise.

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

  9. INSPECT LIFTER MOTOR PTC THERMISTOR OPERATION 
    Fig 10: Inspecting Lifter Motor Operation
    G02928144Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 11: Inspecting Lifter Motor PTC Thermistor Operation (1 Of 2)
      G02928145Courtesy 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 ascend.

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

    Fig 12: Inspecting Lifter Motor PTC Thermistor Operation (2 Of 2)
    G02928146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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. Reverse the polarity, check that the motor turns counter clockwise.

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

  11. INSPECT RECLINING MOTOR PTC THERMISTOR OPERATION 
    Fig 13: Inspecting Reclining Motor Operation
    G02928147Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    2. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 14: Inspecting Reclining Motor PTC Thermistor Operation (1 Of 2)
      G02928148Courtesy 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 1 and the negative (-) lead to terminal 2, check that the seat back begins to fall backward.

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

    Fig 15: Inspecting Reclining Motor PTC Thermistor Operation (2 Of 2)
    G02928149Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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: Inspecting Lumbar Support Motor Operation (1 Of 2)
      G02928150Courtesy 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: Inspecting Lumbar Support Motor Operation (2 Of 2)
    G02928151Courtesy 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 21 on the lumbar support motor connector and move the lumbar support to front end position.
      Fig 18: Inspecting Lumbar Support Motor PTC Thermistor Operation (1 Of 2)
      G02928152Courtesy 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: Inspecting Lumbar Support Motor PTC Thermistor Operation (2 Of 2)
    G02928153Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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