FixVault
Home › Toyota › 2003 › Avalon XLS › Repair and Diagnosis › Body & Frame › Seats › Power Seat Control System (W/O Driving Position Memory › Inspection

Power Seat Control System (W/O Driving Position Memory: Inspection

  1. INSPECT DRIVER'S POWER SEAT SWITCH CONTINUITY 

    Slide switch: 

    Fig 1: Inspecting Driver's Power Seat Switch
    G02818574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DRIVER'S POWER SEAT SWITCH CONTINUITY REFERENCE - SLIDE SWITCH

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

    Front vertical switch: 

    DRIVER'S POWER SEAT SWITCH CONTINUITY REFERENCE - FRONT VERTICAL SWITCH

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

    Lifter switch: 

    DRIVER'S POWER SEAT SWITCH CONTINUITY REFERENCE - LIFTER SWITCH

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

    Reclining switch: 

    DRIVER'S POWER SEAT SWITCH CONTINUITY REFERENCE - RECLINING SWITCH

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

    If continuity is not as specified, replace the switch.

  2. INSPECT DRIVER'S POWER SEAT SWITCH CIRCUIT 
    Fig 2: Identifying Driver's Power Seat Switch Connector Terminal View (Wire Harness Side)
    G02818575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    DRIVER'S POWER SEAT SWITCH CIRCUIT INSPECTION REFERENCE

    Tester Connection Condition Specified Condition
    4 - Ground Constant Continuity
    1 - 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 
    Fig 3: Inspecting Passenger's Power Seat Switch
    G02818576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Slide switch: 

    PASSENGER'S POWER SEAT SWITCH CONTINUITY REFERENCE - SLIDE SWITCH

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

    Front vertical switch: 

    PASSENGER'S POWER SEAT SWITCH CONTINUITY REFERENCE - FRONT VERTICAL SWITCH

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

    Lifter switch: 

    PASSENGER'S POWER SEAT SWITCH CONTINUITY REFERENCE - LIFTER SWITCH

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

    Reclining switch: 

    PASSENGER'S POWER SEAT SWITCH CONTINUITY REFERENCE - RECLINING SWITCH

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

    If continuity is not as specified, replace the switch.

  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 Connector Terminal View
    G02818577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    PASSENGER'S POWER SEAT SWITCH INSPECTION REFERENCE

    Tester Connection Condition Specified Condition
    4 - Ground Constant Continuity
    1 - 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 
    Fig 5: Inspecting Driver's Lumbar Support Switch
    G02818578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DRIVER'S LUMBAR SUPPORT SWITCH CONTINUITY REFERENCE

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

    If continuity is not as specified, replace the switch.

  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 Driver's Lumbar Support Switch Connector Terminal View (Wire Harness Side)
    G02818579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    DRIVER'S LUMBAR SUPPORT SWITCH INSPECTION REFERENCE

    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 PASSENGER'S LUMBAR SUPPORT SWITCH CONTINUITY 
    Fig 7: Inspecting Passenger's Lumbar Support Switch
    G02818580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    PASSENGER'S LUMBAR SUPPORT SWITCH CONTINUITY REFERENCE

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

    If continuity is not as specified, replace the switch.

  8. INSPECT PASSENGER'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 8: Identifying Passenger's Lumbar Support Switch Connector Terminal View (Wire Harness Side)
    G02818581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    PASSENGER'S LUMBAR SUPPORT SWITCH CIRCUIT INSPECTION REFERENCE

    Tester Connection Condition Specified Condition
    2 - Ground Constant Continuity
    1 - Ground Constant Battery Positive Voltage

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

  9. INSPECT SLIDE MOTOR OPERATION 
    Fig 9: Inspecting Slide Motor Operation
    G02818582Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns counterclockwise.
    2. Reverse the polarity, check that the motor turns clockwise.

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

  10. INSPECT SLIDE MOTOR PTC THERMISTOR OPERATION 

    (): 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 front position.
      2. Fig 10: Connecting Positive (+) Lead From Battery To Terminal 1
      G02818583Courtesy 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 2 (1) and the negative (-) lead to terminal 1 (2), check that the seat cushion begins to move backwards.
      5. Fig 11: Connecting Positive (+) Lead From Battery To Terminal 2
      G02818584Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  11. INSPECT FRONT VERTICAL MOTOR OPERATION 
    Fig 12: Inspecting Front Vertical Motor Operation
    G02818585Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns counterclockwise.
    2. Reverse the polarity, check that the motor turns clockwise.

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

  12. INSPECT FRONT VERTICAL MOTOR PTC THERMISTOR OPERATION 

    (): 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. Fig 13: Connecting Positive (+) Lead From Battery To Terminal 1 Then Moving Seat Cushion To Highest Position
      G02818586Courtesy 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 (1) and the negative (-) lead to terminal 1 (2), check that the seat cushion begins to descend.
      5. Fig 14: Connecting Positive (+) Lead From Battery To Terminal 2 & Negative (-) Lead To Terminal 1
      G02818587Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  13. INSPECT REAR VERTICAL MOTOR OPERATION 
    Fig 15: Inspecting Rear Vertical Motor Operation
    G02818588Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns counterclockwise.
    2. Reverse the polarity, check that the motor turns clockwise.

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

  14. INSPECT REAR VERTICAL MOTOR PTC THERMISTOR OPERATION 
    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 highest position.
      2. Fig 16: Connecting Positive (+) Lead From Battery To Terminal 2 Then Moving Seat Cushion To Highest Position
      G02818589Courtesy 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 (2) and the negative (-) lead to terminal 2 (1), check that the seat cushion begins to descend.
      5. Fig 17: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2
      G02818590Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  15. INSPECT RECLINING MOTOR OPERATION 
    Fig 18: Inspecting Reclining Motor Operation
    G02818591Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Connect the positive (+) lead from the battery to terminal 1 and the negative (-) lead to terminal 2, check that the motor turns counterclockwise.
    2. Reverse the polarity, check that the motor turns clockwise.

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

  16. 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. Fig 19: Connecting Positive (+) Lead From Battery To Terminal 2 Then Reclining Seat Back To Most Forward Position
      G02818592Courtesy 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.
      5. Fig 20: Connecting Positive (+) Lead From Battery To Terminal 1 & Negative (-) Lead To Terminal 2
      G02818593Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  17. INSPECT LUMBAR SUPPORT MOTOR OPERATION 
    Fig 21: Inspecting Lumbar Support Motor Operation (Release Side)
    G02818594Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    2. Reverse the polarity, check that the lumbar support moves forward.
      3. Fig 22: Checking Lumbar Support Moves Forward
      G02818595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  18. INSPECT LUMBAR SUPPORT MOTOR CIRCUIT BREAKER OPERATION 
    Fig 23: Inspecting Lumbar Support Motor Circuit Breaker Operation (Front End Position)
    G02818596Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    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 release side with in approximately 60 seconds.
      4. Fig 24: Inspecting Lumbar Support Motor Circuit Breaker Operation (Release Side)
      G02818597Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    If operation is not as specified, replace the motor.

About FixVault