Seat Occupant Sensor: Description and Operation

System Diagram:

SYSTEM DESCRIPTION

DESCRIPTION OF OCCUPANT CLASSIFICATION SYSTEM

a. 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.

b. OCCUPANT CLASSIFICATION SENSOR




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.

c. DESCRIPTION FOR PASSENGER AIRBAG ON/ OFF INDICATOR




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.