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Section 263 (Front Power Seat Control System): Inspection

WARNING: This page is about a different car, the 2003 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. INSPECT SEAT MEMORY SWITCH (w/ MEMORY) 
    1. Inspect the switch continuity.
      Fig 1: Identifying Seat Memory Switch Connector Terminal
      G03373573Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      MEMORY SWITCH TERMINAL SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 2 SET Switch ON Continuity
      2 <==> 3 SW1 Switch ON Continuity
      2 <==> 4 SW2 Switch ON Continuity

      If the result is not as specified, replace the switch assy.

  2. INSPECT FRONT POWER SEAT SWITCH LH (w/o MEMORY)
    1. Inspect the continuity between the terminals when each switch is operated.
      Fig 2: Identifying Front Power Seat Switch LH
      G03373574Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Slide switch): 

      SLIDE SWITCH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 9 FRONT Continuity
      4 <==> 6
      4 <==> 6 <==> 9 OFF Continuity
      1 <==> 6 REAR Continuity
      4 <==> 9

      Standard (Front vertical switch): 

      FRONT VERTICAL SWITCH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 10 UP Continuity
      4 <==> 5
      4 <==> 5 <==> 10 OFF Continuity
      1 <==> 5 DOWN Continuity
      4 <==> 10

      Standard (Lifter switch): 

      LIFTER SWITCH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 7 UP Continuity
      4 <==> 8
      4 <==> 7 <==> 8 OFF Continuity
      1 <==> 8 DOWN Continuity
      4 <==> 7

      Standard (Reclining switch): 

      RECLINING SWITCH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 3 FRONT Continuity
      2 <==> 4
      2 <==> 3 <==>4 OFF Continuity
      1 <==> 2 REAR Continuity
      3 <==> 4

      If the result is not as specified, replace the front power seat switch.

  3. INSPECT FRONT POWER SEAT SWITCH RH 
    1. Inspect the continuity between the terminals when each switch is operated.
      Fig 3: Identifying Front Power Seat Switch RH
      G03373575Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard (Slide switch): 

      SLIDE SWITCH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 9 FRONT Continuity
      4 <==> 6
      6 <==> 4 <==> 9 OFF Continuity
      4 <==> 9 REAR Continuity
      1 <==> 6

      Standard (Reclining switch): 

      RECLINING SWITCH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 3 FRONT Continuity
      2 <==> 4
      2 <==> 4 <==> 3 OFF Continuity
      1 <==> 2 REAR Continuity
      3 <==> 4

      If the result is not as specified, replace the front power seat switch.

  4. INSPECT POWER SEAT SWITCH ASSY (LUMBAR SUPPORT) 
    1. Inspect the continuity between the terminals when the switch is operated.
      Fig 4: Identifying Power Seat Switch Assy Connector Terminal
      G03373576Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      LUMBAR SUPPORT SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      1 <==> 2 HOLD Continuity
      3 <==> 4
      3 <==> 2 <==> 4 OFF Continuity
      1 <==> 3 RELEASE Continuity
      4 <==> 5

      If the result is not as specified, replace the power seat switch assy.

  5. INSPECT FRONT SEAT ADJUSTER ASSY 
    1. Inspect operation of the slide motor.
      1. Check that the motor rotates smoothly when the battery is connected to the slide motor connector terminals.
        Fig 5: Inspecting Front Seat Adjuster Assy
        G03373577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SLIDE MOTOR OPERATIONAL CHART

        Tester Condition Operational Direction
        Battery positive voltage --> 1
        Battery negative voltage --> 2        		 Clockwise
        Battery positive voltage --> 2
        Battery negative voltage --> 1        		 Counterclockwise

        If the result is not as specified, replace the slide motor.

    2. LH side:

      Inspect operation of the front vertical motor.

      1. Check that the motor rotates smoothly when the battery is connected to the front vertical motor connector terminals.
        Fig 6: Inspecting Operation Of Front Vertical Motor
        G03373578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        FRONT VERTICAL MOTOR OPERATIONAL CHART

        Tester Condition Operational Direction
        Battery positive voltage --> 1
        Battery negative voltage --> 2        		 Clockwise
        Battery positive voltage --> 2
        Battery negative voltage --> 1        		 Counterclockwise

        If the result is not as specified, replace the front vertical motor.

    3. LH side:

      Inspect operation of the lifter motor.

      1. Check that the motor rotates smoothly when the battery is connected to the lifter motor connector terminals.
        Fig 7: Inspecting Operation Of Lifter Motor
        G03373579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        LIFTER MOTOR OPERATIONAL CHART

        Tester Condition Operational Direction
        Battery positive voltage --> 1
        Battery negative voltage --> 2        		 Clockwise
        Battery positive voltage --> 2
        Battery negative voltage --> 1        		 Counterclockwise

        If the result is not as specified, replace the lifter motor.

    4. Inspect operation of the reclining motor.
      1. Check that the motor rotates smoothly when the battery is connected to the reclining motor connector terminals.
        Fig 8: Inspecting Operation Of Reclining Motor
        G03373580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        RECLINING MOTOR OPERATIONAL CHART

        Tester Condition Operational Direction
        Battery positive voltage --> 1
        Battery negative voltage --> 2        		 Clockwise
        Battery positive voltage --> 2
        Battery negative voltage --> 1        		 Counterclockwise

        If the result is not as specified, replace the reclining motor.

  6. LH side: INSPECT LUMBAR SUPPORT ADJUSTER ASSY 
    1. Inspect operation of the motor.
      Fig 9: Identifying Lumbar Support Adjuster Assy Connector Terminal
      G03373581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      LUMBAR SUPPORT ADJUSTER MOTOR OPERATIONAL CHART

      Tester Condition Operational Direction
      Battery positive voltage --> 1
      Battery negative voltage --> 2      		 Clockwise
      Battery positive voltage --> 2
      Battery negative voltage --> 1      		 Counterclockwise

      If the result is not as specified, replace the lumbar support adjuster motor.

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