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

GF91.60-P-1100G Passenger-side Seat Occupied Recognition Function
MODEL 463.306 /336 /346 up to 31.5.12 as of model year 2011 /YoM 10
MODEL 463.202 /222 /236 /237 up to 31.5.12 as of model year 2009 /YoM 08
MODEL 463.247 /248 /249 /254 /270 /271 /303 /340 /341 up to 31.5.12 as of model year 2007

Function requirements:
^ Circuit 15R ON

General
The front passenger seat occupation status is always sensed by the supplemental restraint system (SRS). Moreover, the installation of a child seat is detected.
The automatic child seat recognition function is only guaranteed to work with a child seat that has been approved and coded by Daimler AG. This child seat must be equipped with 2 transponders (resonators), which are located in its base on the left and right.

Function sequence
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 in each case to the restraint systems control unit (N2/7).

The following situations are defined:
^ Seat not occupied:
If the seat belt is not buckled, the front passenger airbag unit and front passenger emergency tensioning retractor unit are switched off. If the seat belt is buckled, the front passenger airbag unit is switched off.
^ Seat occupied:
Front passenger airbag unit is enabled.
^ Child seat detected:
Front passenger airbag unit is disabled.

Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
The signal for switching on the automatic child seat recognition airbag OFF indicator lamp when a child seat has been detected is transmitted by the restraint systems control unit to the upper control panel control unit (N72/1).
It switches the automatic child seat recognition airbag OFF indicator lamp On or Off.

Error 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. plug 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 not properly 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.