Seat Occupant Classification Module - Air Bag: Description and Operation

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

Component Identification:

Location
The WS control unit is located on the seat frame of the front passenger seat.

Task
The WSS control unit has the following tasks:
^ Reading in of sensors and signals
^ Perform self-test
^ Evaluation of input factors
^ Transmitting signals

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

Direct line
The following sensors and signals are read in via a direct line:
- Belt tension sensor (B48/3)
- Pressure sensor (B48/4)

Perform self-test
The WSS control unit performs a self-test when the system is started. Here the belt tension sensor and the pressure sensor are checked. If a fault is detected, the fault is stored in the fault memory of the WSS control unit.

Evaluation of input factors
The read in input parameters are evaluated by the integrated microprocessor and sent as a signal to the interior CAN.

Transmitting signals
Signals are sent over the following line:
^ Interior CAN

Interior CAN
The following signals are sent over the interior CAN to the restraint systems control unit (N2/7):
- Weight class
- Occupation status (person or child seat)

Child seats must comply with the American FMVSS 208 specifications, to be recognized by the WSS control unit.