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Seat Heater Switch: Inspection

  1. INSPECT SEAT HEATER SWITCH 
    1. Inspect the driver side seat heater switch operation.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        SWITCH SPECIFICATION

        Tester Connection Switch Position Specified Condition
        3 (IG) - 5 (SW) OFF 10 kΩ or higher
        3 (IG) - 5 (SW) ON Below 1 Ω
        4 (RV) - S (SW) ON (Minimum to Maximum) 0.35 to 3.4 kΩ
        Fig 1: Identifying Seat Heater Switch Connector Terminal
        G05421931Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

      2. Turn the seat heater switch on and check if the seat heater switch indicator comes on.

      OK 

      BATTERY TERMINAL REFERENCE

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 3 (IG)
      Battery negative (-) → Terminal 9 (E)      		 Comes on

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

    2. Inspect the front passenger side seat heater switch operation.
      1. Measure the resistance according to the value(s) in the table below.
        Fig 2: Identifying Seat Heater Switch Connector Terminal
        G05421932Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard resistance 

        SWITCH SPECIFICATION

        Tester Connection Switch Position Specified Condition
        3 (IG) - 8 (SW) OFF 10 kΩ or higher
        3 (IG) - 8 (SW) ON Below 1 Ω
        2 (RV) - 8 (SW) ON (Minimum to Maximum) 0.35 to 3.4 kΩ

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

      2. Turn the seat heater switch on and check if the seat heater switch indicator comes on.

      OK 

      BATTERY TERMINAL REFERENCE

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 3 (IG)
      Battery negative (-) → Terminal 9 (E)      		 Comes on

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

    3. Check if the seat heater switch indicator comes on.
      Fig 3: Identifying Seat Heater Switch Indicator
      G05421933Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK 

      BATTERY TERMINAL REFERENCE

      Measurement Condition Specified Condition
      Battery positive (+) → Terminal 10 (ILL+)
      Battery negative (-) → Terminal 6 (ILL-)      		 Comes on

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

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