GF91.60-P-1100FLU Passenger-Side Seat Occupied Recognition Function

GF91.60-P-1100FLU Passenger-side Seat Occupied Recognition Function
- with CODE (494) USA version

General function requirements
^ C. 15R On

The electronic ignition lock control unit (N73) transmits circuit status 15R via the chassis CAN (CAN E) to the supplement restraint system control unit (N2/10).

Passenger-side seat occupied recognition, general
The passenger-side seat occupied recognition detects whether the front passenger seat is occupied.

The passenger-side seat occupied recognition consists of the following subfunctions:
^ Function sequence for front passenger seat occupied recognition
^ Function sequence for outputting status and fault messages

Function sequence for front passenger seat occupied recognition
The front passenger seat occupied recognition and automatic child seat recognition are determined by means of the weight that is on the front passenger seat. The weight is determined using a pressure measurement from the seat occupied recognition pressure sensor (B48/4) 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.

The weight sensing system (WSS) control unit (WSS) (N110) uses these two measured values to perform a weight classification of the weight present and the corresponding information is forwarded via the interior CAN (CAN B) to front SAM control unit with fuse and relay module (N10/1) and from there via the chassis CAN to the supplemental restraint system control unit (N2/10).

The following conditions are defined depending on the weight classification:
- Seat not occupied:
The passenger airbag, passenger sidebag and the emergency tensioning retractor are switched off.

- Seat occupied:
- Low weight (e.g. child seat) and seat belt fastened: The front passenger airbag unit is switched off.
- Person detected:
The required restraint equipment is enabled.

Function sequence for outputting status and fault messages
The output of status and fault messages consists of the following subfunctions:
^ Function sequence for actuation of the automatic child seat recognition warning lamp (S6/1e1)
^ Function sequence for outputting fault messages

Function sequence for actuation of the automatic child seat recognition warning lamp
If the front passenger seat is not found to be occupied, the automatic child seat recognition warning lamp in the instrument panel switch group (S6/1) is switched on.

If the front passenger seat is found to be occupied, the automatic child seat recognition warning lamp in the instrument panel switch group is switched off.

If a light weight is detected and the seat belt is also fastened, the automatic child seat recognition warning lamp is also switched on.

Function sequence for outputting fault messages
Faults or malfunctions that occur during the seat occupied recognition are sent by the weight sensing system control unit via interior CAN to the instrument cluster (A1) which shows a corresponding message in the multifunction display (A1p13).