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Seat Heater System: Inspection

  1. INSPECT SEAT HEATER SWITCH LH 
    1. Inspect the continuity between the terminals when the switch is operated.
      Fig 1: Identifying Seat Heater Switch And Connector Terminals (LH)
      G03373592Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      SEAT HEATER SWITCH LH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      3 <==> 4 ON (Max.) Continuity
      1 <==> 3 OFF No continuity
      2 <==> 3 ON (Min.) Continuity
      5 <==> 6 Illumination circuit Continuity
    2. Inspect the seat heater switch indicator light.
      1. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 1.
      2. Push the seat heater switch ON and check that the indicator light lights up.

        If the result is not as specified, replace the seat heater switch and inspect the circuits connected to the other parts.

    3. Inspect the seat heater switch illumination.
      1. Connect the positive (+) lead from the battery to terminal 6 and the negative (-) lead to terminal 5.
      2. Check that the switch illuminates.

        If the result is not as specified, replace the seat heater switch or bulb.

        Fig 2: Identifying Seat Heater Switch Illumination And Connector Terminals (LH)
        G03373593Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT SEAT HEATER SWITCH RH 
    1. Inspect the continuity between the terminals when the switch is operated.
      Fig 3: Identifying Seat Heater Switch And Connector Terminals (RH)
      G03373594Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      SEAT HEATER SWITCH RH SPECIFIED CONDITION CHART

      Terminal No. Switch Position Specified Condition
      3 <==> 4 ON (Max.) Continuity
      1 <==> 3 OFF No continuity
      2 <==> 3 ON (Min.) Continuity
      5 <==> 6 Illumination circuit Continuity
    2. Inspect the seat heater switch indicator light.
      1. Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead to terminal 1.
      2. Push the seat heater switch ON and check that the indicator light lights up.

        If the result is not as specified, replace the seat heater switch and inspect the circuits connected to the other parts.

    3. Inspect the seat heater switch illumination.
      1. Connect the positive (+) lead from the battery to terminal 6 and the negative (-) lead to terminal 5.
      2. Check that the switch illuminates.

        If the result is not as specified, replace the seat heater switch or bulb.

        Fig 4: Identifying Seat Heater Switch Illumination And Connector Terminals (RH)
        G03373595Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT FRONT SEAT BACK HEATER ASSY LH 
    1. Inspect the seatback heater continuity.
      Fig 5: Identifying Front Seat Back Heater Assy LH Connector Terminal
      G03373596Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      FRONT SEAT BACK HEATER LH SPECIFIED CONDITION CHART

      Terminal No. Condition Specified Condition
      1 <==> 2 Constant Continuity

      If continuity is not as specified, replace the seatback cover assy.

  4. INSPECT FRONT SEAT BACK HEATER ASSY RH 
    1. inspect the seatback heater assembly RH continuity.
      Fig 6: Identifying Front Seat Back Heater Assy RH Connector Terminal
      G03373597Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      FRONT SEAT BACK HEATER RH SPECIFIED CONDITION CHART

      Terminal No. Condition Specified Condition
      1 <==> 2 Constant Continuity

      If continuity is not as specified, replace the seatback cover assy.

  5. INSPECT FRONT SEAT CUSHION HEATER ASSY LH 
    1. Inspect the seat cushion heater continuity.
      1. Inspect the seat cushion heater continuity between the terminals.
        Fig 7: Identifying Front Seat Cushion Heater Assy LH Connector Terminal
        G03373598Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        FRONT SEAT CUSHION HEATER LH SPECIFIED CONDITION CHART

        Terminal No. Condition Specified Condition
        A-1 <==> B-2 Constant Continuity
        A-4 <==> B-2
        A-1 <==> A-4
        A-2 <==> A-3
        B-1 <==> B-2

        If the result is not as specified, replace the seat cushion cover assy.

  6. INSPECT FRONT SEAT CUSHION HEATER ASSY RH 
    1. Inspect the seat cushion heater continuity.
      1. Inspect the seat cushion heater continuity between the terminals.
        Fig 8: Identifying Front Seat Cushion Heater Assy RH Connector Terminal
        G03373599Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        FRONT SEAT CUSHION HEATER RH SPECIFIED CONDITION CHART

        Terminal No. Condition Specified Condition
        A-1 <==> B-2 Constant Continuity
        A-4 <==> B-2
        A-1 <==> A-4
        A-2 <==> A-3
        B-1 <==> B-2

        If the result is not as specified, replace the seat cushion cover assy.

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