Seat Occupant Classification Module - Air Bag: Description and Operation

GF91.60-P-4069CWU Weight Sensing System (WSS) Control Unit, Component Description
- with CODE (494) USA version

Component Identification:

Location
The Weight Sensing System (WSS) control unit is located in the seat frame of the front passenger seat.

Task
The Weight Sensing System (WSS) control unit measures the weight (person or child seat) on the front passenger seat. It is determined by measuring the pressure in a gel mat filled with silicone. The pressure measurement is carried out by the seat occupied recognition pressure sensor (B48/4).

The tractive force on the seat belt is transmitted via the belt tension sensor (B48/3) to the Weight Sensing System (WSS) control unit.

The Weight Sensing System (WSS) control unit uses the pressure and the seat belt tension to calculate the corresponding weight class and forwards this information via interior CAN to the supplemental restraint system control unit (N2/10).

The Weight Sensing System (WSS) control unit carries out a self-test with circuit 15 On, during which the pressure sensor and the belt tension sensor are also checked.

Discrete inputs
^ Circuit 30
^ Circuit 31
^ Belt tension sensor
^ Seat occupied recognition pressure sensor

Discrete outputs
^ Power supply of:
- Belt tension sensor
- Seat occupied recognition pressure sensor