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Power Seat Control System - Components & Inspection: Inspection

  1. INSPECT DRIVER'S POWER SEAT SWITCH CONTINUITY 

    Slide switch: 

    TESTER CONNECTION SPECIFICATION

    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: 

    TESTER CONNECTION SPECIFICATION

    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: 

    TESTER CONNECTION SPECIFICATION

    Switch position Tester connection Specified condition
    UP 1 - 7
    4 - 8    		 Continuity
    OFF 4 - 7
    4 - 8    		 Continuity
    DOWN 1 - 8
    4 - 7    		 Continuity
    Fig 1: Inspecting Driver'S Power Seat Switch Continuity
    G03471271Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Reclining switch: 

    TESTER CONNECTION SPECIFICATION

    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 
    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: Connecting Seat Wire Harness To Floor Wire Harness
    G03471272Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFICATION

    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 

    Slide switch: 

    TESTER CONNECTION SPECIFICATION

    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: 

    TESTER CONNECTION SPECIFICATION

    Switch position Tester connection Specified condition
    UP 1 - 5
    4 - 10    		 Continuity
    OFF 4 - 5
    4 - 10    		 Continuity
    DOWN 1 - 10
    4 - 5    		 Continuity
    Fig 3: Inspecting Passenger'S Power Seat Switch Continuity
    G03471273Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Lifter switch: 

    TESTER CONNECTION SPECIFICATION

    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: 

    TESTER CONNECTION SPECIFICATION

    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: Disconnecting Switch Connector
    G03471274Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFICATION

    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 
    TESTER CONNECTION SPECIFICATION

    Switch position Tester connection Specified condition
    FORWARD 1 - 4
    2 - 3    		 Continuity
    OFF 1 - 3
    2 - 3    		 Continuity
    RELEASE 1 - 3
    2 - 4    		 Continuity
    Fig 5: Inspecting Driver'S Lumbar Support Switch Continuity
    G03471275Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    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
    G03471276Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFICATION

    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 
    TESTER CONNECTION SPECIFICATION

    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.

    Fig 7: Inspecting Passenger'S Lumbar Support Switch Continuity
    G03471277Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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: Inspecting Connector On Wire Harness Side
    G03471278Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TESTER CONNECTION SPECIFICATION

    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 
    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.

    Fig 9: Checking Motor Turns Counterclockwise
    G03471279Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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. Continue to apply voltage, check that current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 10: Moving Seat Cushion To Front Position
      G03471280Courtesy 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 2 (1) and the negative (-) lead to terminal 1 (2), check that the seat cushion begins to move backwards.

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

    Fig 11: Checking Seat Cushion Begins To Move Backwards
    G03471281Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. 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 counterclockwise.
    2. Reverse the polarity, check that the motor turns clockwise.

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

    Fig 12: Checking Motor Turns Counterclockwise
    G03471282Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 13: Moving Seat Cushion To Highest Position
      G03471283Courtesy 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 (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: Checking Seat Cushion Begins To Descend
    G03471284Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. 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 counterclockwise.
    2. Reverse the polarity, check that the motor turns clockwise.

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

    Fig 15: Checking Motor Turns Counterclockwise
    G03471285Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  14. INSPECT LIFTER 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. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 16: Moving Seat Cushion To Highest Position
      G03471286Courtesy 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 (2) and the negative (-) lead to terminal 2 (1), check that the seat cushion begins to descend.

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

    Fig 17: Checking Seat Cushion Begins To Descend
    G03471287Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. 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 counterclockwise.
    2. Reverse the polarity, check that the motor turns clockwise.

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

    Fig 18: Checking Motor Turns Counterclockwise
    G03471288Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  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. Continue to apply voltage, check that the current changes to less than 1 ampere within 4 to 90 seconds.
      Fig 19: Inspecting Reclining Motor PTC Thermistor Operation
      G03471289Courtesy 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.
      Fig 20: Checking Seat Back Begins To Fall Backward
      G03471290Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

  17. 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 21: Inspecting Lumbar Support Motor Operation
      G03471291Courtesy 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 22: Checking Lumbar Support Moves Forward
    G03471292Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  18. 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 23: Inspecting Lumbar Support Motor Circuit Breaker Operation
      G03471293Courtesy 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 release side with in approximately 60 seconds.

    If operation is not as specified, replace the motor.

    Fig 24: Checking Lumbar Support Begins To Move Release Side
    G03471294Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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