Passenger-side seat occupied recognition function - GF91.60-P-1100SXA
MODEL 216.3, 221.0 /1 up to 31.5.07 except CODE (494) USA version
MODEL 216.3, 221.0 /1 as of 1.6.07 except CODE (494) USA version with CODE (U18) Automatic child seat recognition (ACSR) up to Model Year 8
Function
The front passenger seat occupancy and the automatic child seat recognition are recorded by the front passenger seat occupied and child seat recognition sensor (B48) and relayed to the restraint systems control unit (N2/7).
The automatic child seat recognition is only guaranteed to work with a child seat that has been approved and coded by DaimlerChrysler. This child seat must be equipped with 2 transponders (resonators), which are located in its base on the left and right.
The following situations are defined:
- Seat unoccupied (seat belt not applied):
the front passenger airbag unit, front passenger sidebag unit and front passenger belt buckle emergency tensioning retractor unit are disabled
- Seat unoccupied (seat belt applied): the front passenger airbag unit is disabled
- Seat occupied (light or heavy person): front passenger airbag unit enabled (ignition of first stage or both stages)
- Child seat detected: Front passenger airbag unit is disabled
Automatic child seat recognition airbag OFF indicator lamp (S6/2e1)
The signal for switching the airbag OFF indicator lamp on when a child seat is detected is transmitted to the central gateway control unit (N93) by the restraint systems control unit via the chassis CAN and then to the upper control panel control unit (N72/1) via the interior CAN. This then relays the signal to the cockpit switch group (S6/2) via the upper control panel LIN.
Error messages
If the seat occupied and child seat recognition sensor is defective or communication with the restraint systems control unit is interrupted (e.g. plug not connected), the 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 wrongly positioned (only one resonator detected), the airbag indicator and warning lamp (A1e15) in the instrument cluster and the airbag OFF indicator lamp are switched on.
| Instrument cluster, component description | A1 | GF54.30-P-6000SX | |
| Seat occupied recognition with automatic child seat recognition, component description | B48 | GF91.60-P-4035SX | |
| Restraint systems control unit, component description | N2/7 | GF91.60-P-4048SX | |
| Upper control panel control unit, component description | N72/1 | GF54.21-P-6040SX | |
| Seat belt buckle switch component description | S68/1, S68/2 | GF91.60-P-4045SX |