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Seat Belt Warning System: Inspection

  1. INSPECT FRONT SEAT INNER BELT ASSY LH 
    1. Inspect the buckle switch.
      1. Fasten the seat belt (Buckle switch is ON).
      2. Check the resistance between the terminals.

        Standard: 

        FRONT SEAT INNER BELT ASSY LH - BUCKLE SWITCH ON

        Tester Connection Specified Condition
        A-3 - A-4 1 MΩ or higher
        A-4 - A-5 Below 1 Ω
        Fig 1: Inspecting Front Seat Inner Belt Assy Buckle Switch ON (LH)
        G03012387Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        *When the positive and negative poles between the terminals are exchanged, there is a resistance of Below 1 Ω in one way but a resistance of 1 MΩ or higher in the other way. 

      3. Release the seat belt (Buckle switch is OFF).
      4. Check the resistance between the terminals.

        Standard: 

        FRONT SEAT INNER BELT ASSY LH - BUCKLE SWITCH OFF

        Tester Connection Specified Condition
        A-3 - A-4 Below 1 Ω
        A-4 - A-5 1 MΩ or higher
        Fig 2: Inspecting Front Seat Inner Belt Assy Buckle Switch OFF (LH)
        G03012388Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        *When the positive and negative poles between the terminals are exchanged, there is a resistance of 1 MΩ or higher in either way. 

      If the result is not as specified, replace the inner belt assy.

  2. INSPECT FRONT SEAT INNER BELT ASSY RH 
    1. Inspect the buckle switch.
      1. Fasten the seat belt (Buckle switch is ON).
      2. Check the resistance between the terminals.

        Standard: 

        FRONT SEAT INNER BELT ASSY RH - BUCKLE SWITCH ON

        Tester Connection Specified Condition
        A-4 - A-5 1 MΩ or higher
        Fig 3: Inspecting Front Seat Inner Belt Assy - Buckle Switch ON (RH)
        G03012389Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Release the seat belt (Buckle switch is OFF).
      4. Check the resistance between the terminals.

        Standard: 

        FRONT SEAT INNER BELT ASSY RH - BUCKLE SWITCH OFF

        Tester Connection Specified Condition
        A-4 - A-5 Below 1 Ω

      If the result is not as specified, replace the inner belt assy.

      Fig 4: Inspecting Front Seat Inner Belt Assy - Buckle Switch OFF (RH)
      G03012390Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the circuit for the airbag seat position sensor.
      1. Check the resistance between the terminals.

      Standard: 

      AIRBAG SEAT POSITION SENSOR

      Tester Connection Specified Condition
      1 - 2 (Connector for airbag seat position sensor) Below 1 Ω

      If the result is not as specified, replace the inner belt assy.

      Fig 5: Inspecting Circuit For Airbag Seat Position Sensor
      G03012391Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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