Restraints and Safety Systems: Description and Operation

SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: SYSTEM DIAGRAM









SYSTEM DESCRIPTION

1. GENERAL DESCRIPTION

(a) In the occupant classification system, the occupant classification ECU calculates the weight of the front passenger based on a signal from the occupant classification sensor. This system judges the occupant to be a child when it detects a weight of less than 27.3 kg (60 lb), and disables the front passenger airbag, front passenger side knee airbag and front seat side airbag RH.

(b) This system is mainly composed of the occupant classification sensor that detects 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, front passenger side knee airbag and front seat side airbag RH.

2. OCCUPANT CLASSIFICATION SENSOR

(a) The occupant classification sensor consists of the gel mat and the pressure sensor.

When weight is applied to the gel mat, the pressure applied through the silicone to the pressure sensor changes. The pressure sensor converts these changes into voltages and transmits them to the occupant classification ECU.





(b) The occupant classification sensor is installed between the seat cushion frame and seat cushion pad. The pressure sensor is installed on the seat frame.

(c) The pressure sensor detects the pressure applied to the front passenger seat as a seated passenger. The occupant classification ECU determines whether the front passenger airbag, front passenger side knee airbag and front seat side airbag RH are deployed based on signals from the pressure sensor.

3. SEAT BELT TENSION SENSOR

(a) The seat belt tension sensor is installed on the front seat outer belt to detect a CRS (Child Restraint System).