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HOMESERVICE MANUALSTOYOTA2009YARIS S, 4D HATCHBACKREPAIR AND DIAGNOSISRESTRAINTSAIR BAG, SRSSUPPLEMENTAL RESTRAINT SYSTEMOCCUPANT CLASSIFICATION SYSTEMSYSTEM DESCRIPTION
2009 Toyota Yaris S, 4D Hatchback

System Description

2009 Toyota Yaris S, 4D HatchbackSECTION System Description
  1. GENERAL 
    1. The front passenger occupant classification system judges whether the front passenger seat is occupied by an adult or child (with child seat) or is unoccupied, in accordance with the load that is applied to the front passenger seat and whether the seat belt is buckled. Thus, when appropriate, it restricts the deployment of the front passenger airbag, front passenger side airbag and the front passenger seat belt pretensioner. In addition, the system informs the driver of the result of the judgment through the use of the airbag ON/ OFF indicator.
      Fig 1: Occupant Classification System - Communications Diagram
      G04830154Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. MAIN COMPONENTS 
    MAIN COMPONENTS DESCRIPTION CHART

    Component Description
    Occupant Classification Sensor Outputs voltages to occupant classification ECU in accordance with load applied to sensor
    Occupant Classification ECU Constantly monitors weight of front passenger seat load, and judges occupancy condition in accordance with signals from occupant classification sensors and seat belt buckle switch
    Airbag ON/OFF Indicator Airbag ON indicator illuminates when front passenger and front passenger side airbags activated. Airbag OFF indicator illuminates when front passenger and front passenger side airbags deactivated.
    Seat Belt Buckle Switch Detects whether seat belt fastened and outputs appropriate signals to occupant classification ECU
RENDER: 1.0x

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