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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 continuity or resistance between the terminals.
        Fig 1: Checking Continuity Or Resistance Between Terminals (Buckle Switch Is ON)
        G03373397Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SPECIFIED CONDITION

        Terminal No. Specified Condition
        A-1 <=> A-4 1,330 Ω
        A-1 <=> A-6 Continuity
      3. Release the seat belt (Buckle switch is OFF).
      4. Check the continuity or resistance between the terminals.
        Fig 2: Checking Continuity Or Resistance Between Terminals (Buckle Switch Is OFF)
        G03373398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SPECIFIED CONDITION

        Terminal No. Specified Condition
        A-1 <=> A-4 330 Ω
        A-1 <=> A-6 No continuity

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

    2. Inspect the circuit for the airbag seat position sensor.
      1. Check the continuity between the terminals of connector A and the connector of the airbag seat position sensor.
        Fig 3: Checking Continuity Between Terminals
        G03373399Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SPECIFIED CONDITION

        Terminal No. Specified Condition
        A-5 <=> 1 (Connector of airbag seat position sensor) Continuity
        A-3 <=> 2 (Connector of airbag seat position sensor)

        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. Short the circuit between connector terminals 1 and 3 of the occupation detection sensor (Seat is occupied).
        Fig 4: Identifying Short Circuit Between Connector Terminals 1 & 3
        G03373400Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Fasten the seat belt (Buckle switch is ON).
      3. Check the continuity between the terminals.
        Fig 5: Checking Continuity Between Terminals (Buckle Switch Is ON)
        G03373401Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SPECIFIED CONDITION

        Terminal No. Specified Condition
        A-2 <=> A-3 No Continuity
        A-4 <=> A-3 No continuity
        A-2 <=> 1 (Connector of occupation detection sensor) Continuity
        A-3 <=> 3 (Connector of occupation detection sensor) No continuity
        A-4 <=> 3 (Connector of occupation detection sensor) Continuity
      4. Release the seat belt (Buckle switch is OFF).
      5. Check the continuity between the terminals.
        Fig 6: Checking Continuity Between Terminals (Buckle Switch Is OFF)
        G03373402Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SPECIFIED CONDITION

        Terminal No. Specified Condition
        A-2 <=> A-3 Continuity
        A-3 <=> A-4 Continuity
        A-2 <=> 1 (Connector of occupation detection sensor) Continuity
        A-3 <=> 3 (Connector of occupation detection sensor) Continuity
        A-4 <=> 3 (Connector of occupation detection sensor) Continuity

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

    2. Inspect the buckle switch.
      1. Disconnect the occupation detection sensor connector (Seat is not occupied).
        Fig 7: Disconnecting Occupation Detection Sensor Connector
        G03373403Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Fasten the seat belt (Buckle switch is ON).
      3. Check the continuity between the terminals.
        Fig 8: Checking Continuity Between Terminals (Buckle Switch Is ON)
        G03373404Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SPECIFIED CONDITION

        Terminal No. Specified Condition
        A-2 <=> A-3 No continuity
        A-4 <=> A-3 No continuity
        A-2 <=> 1 (Connector of occupation detection sensor) Continuity
        A-3 <=> 3 (Connector of occupation detection sensor) No continuity
        A-4 <=> 3 (Connector of occupation detection sensor) Continuity
      4. Release the seat belt (Buckle switch is OFF).
      5. Check the continuity between the terminals.
        Fig 9: Checking Continuity Between Terminals (Buckle Switch Is OFF)
        G03373405Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

        Standard: 

        SPECIFIED CONDITION

        Terminal No. Specified Condition
        A-2 <=> A-3 No continuity
        A-3 <=> A-4 Continuity
        A-2 <=> 1 (Connector of occupation detection sensor) Continuity
        A-3 <=> 3 (Connector of occupation detection sensor) Continuity
        A-4 <=> 3 (Connector of occupation detection sensor) Continuity

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

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