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

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

General function requirements
^ C. 15R On

Passenger-side seat occupied recognition, general
The front passenger seat occupation status is detected by the supplemental restraint system (SRS). The installation of a child seat is recognized by the automatic child seat recognition.

Automatic child seat recognition is only ensured with use of a child seat approved and coded by Daimler AG. This child seat must be equipped with two transponders (resonators), which are located at the left and right in its base.

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 occupancy as well as the automatic child seat recognition are sensed by the front passenger seat occupied and child seat recognition sensor (B48). The signals are forwarded to the restraint systems control unit (N2/7).

The following situations are defined:
- Seat unoccupied
If the seat belt is not buckled, the front passenger airbag unit, front passenger sidebag unit and front passenger buckle emergency tensioning retractor unit are disabled If the seat belt is buckled, the front passenger airbag unit is disabled

- Seat occupied (light or heavy person)
Front passenger airbag unit is enabled (ignition of first stage or both stages)

- Child seat detected
Front passenger airbag unit is disabled

Function sequence for outputting status and fault messages
The output of status and fault messages consists of the following subfunctions:
^ Function sequence for actuating the automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
^ Function sequence for outputting fault messages

Function sequence for actuating the automatic child seat recognition
airbag OFF indicator lamp
The signal for switching on and off the automatic child seat recognition airbag OFF indicator lamp is transmitted by the restraint systems control unit via interior CAN to the upper control panel control unit (N72/1). It switches the automatic child seat recognition airbag OFF indicator lamp On or Off.

Function sequence for outputting fault messages
If the seat occupied and automatic child seat recognition sensor is defective or communication with the restraint systems control unit is interrupted (e.g. connector not connected), the automatic child seat recognition airbag OFF indicator lamp is also switched on. A fault is also stored in the restraint systems control unit and an appropriate message is shown on the instrument cluster (A1).

If the child seat is defective or improperly positioned (only one resonator detected), the airbag indicator and warning lamp (A1e15) in the instrument cluster and the automatic child seat recognition airbag OFF indicator lamp are switched on.