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Power Seat Control System: Inspection

  1. INSPECT DRIVER'S POWER SEAT SWITCH CONTINUITY 

    Slide Switch: 

    SLIDE SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    FRONT 4-7 8-11 Continuity
    OFF 4-7-8 Continuity
    BACK 4-11 7-8 Continuity

    Front vertical switch: 

    FRONT VERTICAL SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    UP 7-9 10-11 Continuity
    OFF 7-9-10 Continuity
    DOWN 7-10 9-11 Continuity

    Lifter switch: 

    POWER SEAT LITTER SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    UP 2-11 3-7 Continuity
    OFF 2-3-7 Continuity
    DOWN 2-7 3-11 Continuity

    Reclining switch: 

    RECLINING SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    FORWARD 1-11 5-7 Continuity
    OFF 1-5-7 Continuity
    REAR 1-7 5-11 Continuity

    If continuity is not as specified, replace the switch.

    Fig 1: Inspecting Driver's Power Seat Switch Continuity
    G02904481Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT DRIVER'S POWER SEAT SWITCH CIRCUIT 
    1. Disconnect the switch connector and connect the seat wire harness to the floor wire harness.
    2. Inspect the connector on the wire harness side.
      Fig 2: Identifying Driver's Power Seat Switch Circuit Wire Harness Side
      G02904482Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Condition Specified condition
    7-Ground Constant Continuity
    11-Ground Constant Battery positive voltage

    If circuit is not as specified, inspect the circuits connected to other parts.

  3. INSPECT PASSENGER'S POWER SEAT SWITCH CONTINUITY 

    Slide switch: 

    SLIDE SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    FRONT 4-7 8-11 Continuity
    OFF 4-7-8 Continuity
    BACK 4-11 7-8 Continuity

    Front vertical switch: 

    CUT FRONT VERTICAL CONTINUITY

    Switch position Tester connection Specified condition
    UP 7-10 9-11 Continuity
    OFF 7-9-10 Continuity
    DOWN 6-9 10-11 Continuity

    Lifter switch: 

    LIFTER SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    UP 2-7 3-11 Continuity
    OFF 2-3-7 Continuity
    DOWN 2-11 3-7 Continuity

    Reclining switch: 

    RECLINING SWITCH CONTINUITY

    Switch position Tester connection Specified condition
    FORWARD 1-11 5-7 Continuity
    OFF 1-5-7 Continuity
    REAR 1-7 5-11 Continuity

    If continuity is not as specified, replace the switch.

    Fig 3: Inspecting Passenger's Power Seat Switch Continuity
    G02904483Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSPECT PASSENGER'S POWER SEAT SWITCH CIRCUIT 
    1. Disconnect the switch connector and connect the seat wire harness to the floor wire harness.
    2. Inspect the connector on the wire harness side.
      Fig 4: Identifying Passenger's Power Seat Switch Circuit Wire Harness Side
      G02904484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Condition Specified condition
    7-Ground Constant Continuity
    11-Ground Constant Battery positive voltage

    If circuit is not as specified, inspect the circuits connected to other parts.

  5. INSPECT DRIVER'S LUMBAR SUPPORT SWITCH CONTINUITY 
    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.

    Fig 5: Inspecting Driver's Lumber Support Switch Continuity
    G02904485Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. INSPECT DRIVER'S LUMBAR SUPPORT SWITCH CIRCUIT 
    1. Disconnect the switch connector and connect the seat wire harness to the floor wire harness.
    2. Inspect the connector on the wire harness side.
      Fig 6: Identifying Wire Harness Side Driver's Lumbar Support Switch Circuit
      G02904486Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFIED CONDITION

    Tester connection Condition Specified condition
    3-Ground Constant Continuity
    4-Ground Constant Battery positive voltage

    If circuit is not as specified, inspect the circuits connected to other parts.

  7. 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 7: Inspecting Sliding Motor Operation
    G02904487Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. 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 front position.
    2. Continue to apply voltage, check that current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 8: Inspecting Voltage By Moving Seat Cushion To Front Position
      G02904488Courtesy 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 backwards.

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

    Fig 9: Moving Seat Cushion Backwards After Checking Voltage
    G02904489Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. INSPECT FRONT VERTICAL 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 Front Vertical Motor Operation
    G02904490Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. INSPECT FRONT VERTICAL MOTOR PTC THERMISTOR OPERATION 
    1. (): Passenger side 
    1. Connect the positive (+) lead from the battery to terminal 1 (2), the positive (+) lead from the ammeter to terminal 2 (1) 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.
    3. Disconnect the leads from the terminals.
    4. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 (1) and the negative (-) lead to terminal 1 (2), check that the seat cushion begins to descend.

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

    Fig 11: Inspecting Voltage By Moving Seat Cushion To Highest Position
    G02904491Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 12: Moving Seat Cushion Begins To Descend After Checking Voltage
    G02904492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. 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 13: Inspecting Lifter Motor Operation
    G02904493Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  12. INSPECT LIFTER MOTOR PTC THERMISTOR OPERATION 
    1. Connect the positive (+) lead from the battery to terminal 1 (2), the positive (+) lead from the ammeter to terminal 2 (1) 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.
    3. Disconnect the leads from the terminals.
    4. Approximately 60 seconds later, connect the positive (+) lead from the battery to terminal 2 (1) and the negative (-) lead to terminal 1 (2), check that the seat cushion begins to descend.

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

    Fig 14: Inspecting Voltage By Moving Seat Cushion To Highest Position
    G02904494Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 15: Moving Seat Cushion Begins To Descend After Checking Voltage
    G02904495Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. 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 16: Inspecting Reclining Motor Operation
    G02904496Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. 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.
    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.

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

    Fig 17: Inspecting Voltage By Moving Seat Back To Forward Position
    G02904497Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 18: Moving Seat Back Begins To Backward After Checking Voltage
    G02904498Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. 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 19: Connecting Terminal & Checking Lumbar Support Moves To Release Side
      G02904499Courtesy 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 20: Checking Lumbar Support Moves Forward
      G02904500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. INSPECT LUMBAR SUPPORT MOTOR CIRCUIT BREAKER 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 21: Connector Terminal & Moving Lumbar Support To Front & Position
      G02904501Courtesy 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 22: Checking Lumbar Support Begins To Move To Release Side
      G02904502Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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