Seat Occupant Classification Module - Air Bag: Description and Operation

GF91.60-P-4069FLU Weight Sensing System (WSS) Control Unit, Component Description
- with CODE (U10) Front passenger seat with weight sensing

Component Identification:

Location
The WSS control unit is located in the seat frame of the front passenger seat.

Task
The WSS control unit has the following tasks:
^ Reading in of sensors
^ Evaluation of input factors
^ Output of signals

Reading in of sensors
The input factors are read in with the following connections:
^ Direct line

Direct line
Signals of the following sensors are read in via a direct line:
- Belt tension sensor (B48/3)
- Seat occupied recognition pressure sensor (B48/4)

Evaluation of input factors
The WSS control unit determines the weight (person or child seat) on the front passenger seat. This is determined via a pressure measurement in a gel mat filled with silicone. The pressure measurement is performed by the seat occupied recognition pressure sensor. The tractive force at the belt is transmitted via the belt tension sensor to the WSS control unit.
The WSS control unit uses the pressure and the belt tension to calculate the corresponding weight class.

Output of signals
The signal is output via the following line:
^ Interior CAN (CAN B)

Interior CAN
The information is sent via interior CAN to the front SAM control unit with fuse and relay module (N10/1). This routes the information onto the chassis CAN (CAN E) for the supplemental restraint system control unit (N2/10).