Front passenger seat occupied recognition sensor, function - GF91.60-P-1100SXU
MODEL 221.0 /1 with CODE (494) USA version up to Model Year 8
WSS (Weight Sensing System)
The front passenger seat occupied and automatic child seat recognition are determined by means of the weight that is on the front passenger seat.
The WSS sensors (B48/11, B48/12, B48/13 and B48/14) determine the weight (person or child seat) on the front passenger seat. The force that is introduced via the seat belt is measured by the belt tension sensor (B48/3) so that weight classification corrections can be made if necessary.
These two measurements are used by the Weight Sensing System (WSS) control unit (N2/13) to calculate a weight classification for the weight on the seat, which is then transmitted to the central gateway control unit (N93) via the interior CAN and then relayed to the restraint systems control unit (N2/7) via the chassis CAN.
The following conditions are defined depending on the weight classification:
- Seat unoccupied: the front passenger airbag unit, front passenger sidebag unit and front passenger belt buckle emergency tensioning retractor unit are disabled
- Seat occupied:
- Light weight (e.g. child seat) and belt applied:
Front passenger airbag unit switched off
- Person detected:
- Light weight (e.g. child seat) and belt applied:
Front passenger airbag unit enabled (ignition of first or both stages)
The signal is also transmitted to the instrument cluster (A1) via the interior CAN, and an appropriate message appears in the multifunction display (A1p13).
Automatic child seat recognition airbag OFF indicator lamp (S6/2e1)
If the front passenger seat is found to be occupied, the automatic child seat recognition airbag OFF indicator lamp in the cockpit switch group (S6/2) is switched off.
If the front passenger seat is found to be unoccupied, the airbag OFF indicator lamp is switched on.
If a light weight is detected and the latch plate has also been inserted, the airbag OFF indicator lamp is switched on as well as the multifunction display in the instrument cluster.
The signal for switching the airbag Off indicator lamp on or off is relayed to the central gateway control unit via the chassis CAN by the restraint systems control unit, from where it is relayed to the instrument cluster via the central CAN.
| Belt tension sensor component description | B48/3 | GF91.60-P-4108SXU | |
| WSS sensor (Weight Sensing System), component description | B48/11, B48/12, B48/13 and B48/14 | GF91.60-P-4036SXU | |
| Restraint systems control unit, component description | N2/7 | GF91.60-P-4048SX | |
| WSS (Weight Sensing System) control unit, component description | N2/13 | GF91.60-P-4046SXU | |
| Seat belt buckle switch, component description | S68/1, S68/2, S68/11, S68/12 | GF91.60-P-4045SX |