Front passenger seat occupied recognition sensor, function - GF91.60-P-1100CWU
MODEL 204.0/2 with CODE (494) USA version up to Model Year 08
Function requirements:
- C. 15R On
Function sequence
The front passenger seat occupied and automatic child seat recognition are determined via the weight that is on the front passenger seat. The weight is determined by the seat occupied recognition pressure sensor (B48/4); it measures the pressure in a seat mat filled with silicone. 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 measured values are used by the Weight Sensing System (WSS) control unit (N110) to calculate the weight classification and forwarded via interior CAN to the front SAM control unit with fuse and relay module (N10/1) and from there via chassis CAN to the supplemental restraint system control unit (N2/10).
Dependent on the weight classification, the following states are defined:
- Seat not occupied:
Front passenger airbag unit, front passenger sidebag unit and front passenger emergency tensioning retractor unit are switched off
- Seat occupied:
- Low weight (e.g. child seat) and seat belt buckled:
Front passenger airbag unit is switched off
- Person recognized:
Enabling the required restraint equipment
- Low weight (e.g. child seat) and seat belt buckled:
The signal is also transmitted via interior CAN to the instrument cluster (A1), which shows a message in the multifunction display (A1p13).
Automatic child seat recognition warning lamp (S6/1e1)
If the front passenger seat is found to be occupied, the automatic child seat recognition warning lamp in the instrument panel switch group (S6/1) is switched off.
If the front passenger seat is found not to be occupied, the automatic child seat recognition warning lamp remains switched on as long as no occupation is found.
If a low weight is detected and the seat belt is buckled, the automatic child seat recognition warning lamp is also switched on.
| Electrical function diagram, supplemental restraint system (SRS) | PE91.60-P-2052-99FAA | ||
| Belt tension sensor component description | B48/3 | GF91.60-P-4108CWU | |
| Seat occupied recognition pressure sensor, component description | B48/4 | GF91.60-P-4067CWU | |
| Supplemental restraint system control unit, component description | N2/10 | GF91.60-P-4068CW | |
| Front SAM control unit with fuse and relay module, component description | N10/1 | GF54.21-P-6070CW | |
| Weight Sensing System (WSS) control unit, component description | N110 | GF91.60-P-4069CWU |