System Description

DESCRIPTION OF OCCUPANT CLASSIFICATION SYSTEM
1. GENERAL DESCRIPTION
  1. In the occupant classification system, the occupant classification ECU calculates the weight of the occupant based on a signal from the occupant classification sensors. This system recognizes the occupant as a child if it detects a weight of less than 36 kg (79.37 lb), and disables the front passenger airbag and front passenger side - side airbag.
  2. This system is mainly comprised of 4 occupant classification sensors that detect the load on the front passenger seat. The occupant classification ECU controls the system, and the passenger airbag ON/OFF indicator indicates the ON/OFF condition of the front passenger airbag and front passenger side - side airbag.
2. OCCUPANT CLASSIFICATION SENSOR
  
  Fig 1: Identifying Occupant Classification Sensor Location
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. The occupant classification sensors are installed on the 4 brackets connecting the seat rail and seat frame. Accordingly, when load is applied to the front passenger seat by an occupant sitting in it, the occupant classification sensors register a distortion.
3. DESCRIPTION FOR PASSENGER AIRBAG ON/OFF INDICATOR
  
  Fig 2: Identifying Passenger Airbag ON/OFF Indicator
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. The passenger airbag ON/OFF indicator is installed on the heater control base. This indicator informs the driver whether the occupant classification ECU puts the front passenger airbag and front passenger side - side airbag into an active state or inactive state.
  2. If a malfunction occurs in the occupant classification system, "OFF" indication of the passenger airbag ON/OFF indicator and the SRS warning light come on.