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Power Seat Control System: Inspection

  1. INSPECT DRIVER'S POWER SEAT SWITCH CONTINUITY 
    Fig 1: Inspecting Driver Side Power Seat Switch Continuity
    G02852259Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SLIDE SWITCH CONTINUITY SPECIFICATIONS

    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 SPECIFICATIONS

    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 SPECIFICATIONS

    Switch Position Tester Connection Specified Condition
    UP 1 - 7, 4 - 8 Continuity
    OFF 4 - 7 - 8 Continuity
    Down 1 - 8, 4 - 10 Continuity
    RECLINING SWITCH CONTINUITY SPECIFICATIONS

    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.

  2. INSPECT PASSENGER'S POWER SEAT SWITCH CONTINUITY 
    Fig 2: Inspecting Passenger Side Power Seat Switch Continuity
    G02852260Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    SLIDE SWITCH CONTINUITY SPECIFICATIONS

    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 SPECIFICATIONS

    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.

  3. INSPECT DRIVER'S LUMBAR SUPPORT SWITCH CONTINUITY 
    Fig 3: Inspecting Driver Side Lumbar Support Switch Continuity
    G02852261Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DRIVER SIDE LUMBAR SUPPORT SWITCH CONTINUITY

    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 counterclockwise.

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

    Fig 4: Inspecting Slide Motor Operation
    G02852262Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. INSPECT SLIDE MOTOR PTC THERMISTOR OPERATION 

    ( ): Passenger Slide 

    1. Connected 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)
      G02852263Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Disconnect the leads from terminals.
    4. Approximately 60 second later, connect the positive (+) lead from the batter 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)
    G02852264Courtesy 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 counterclockwise.

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

    Fig 7: Inspecting Front Tilt Motor Operation
    G02852265Courtesy 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 with 4 to 90 seconds.
      Fig 8: Inspecting Front Tilt Motor PTC Thermistor Operation (1 Of 2)
      G02852266Courtesy 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)
    G02852267Courtesy 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 counterclockwise.

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

    Fig 10: Inspecting Lifter Motor Operation
    G02852268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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. 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)
      G02852269Courtesy 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)
    G02852270Courtesy 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 counterclockwise.

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

    Fig 13: Inspecting Reclining Motor Operation
    G02852271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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 positive.
    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)
      G02852272Courtesy 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)
    G02852273Courtesy 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 lumber support moves to release side.
      Fig 16: Inspecting Lumbar Support Motor Operation (1 Of 2)
      G02852274Courtesy 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)
    G02852275Courtesy 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)
      G02852276Courtesy 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)
    G02852277Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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