GF91.60-P-4008-03Q Seat Occupied Recognition Sensor With Automatic Child Seat Recognition, Function

GF91.60-P-4008-03Q Seat Occupied Recognition Sensor With Automatic Child Seat Recognition, Function

Seat occupied recognition sensor
If the front passenger seat is occupied by a person, the pressure load of the seat area increases. This in turn causes the resistance in the force sensing resistor in the sensor mat to alter. If the pressure on the seat surface exceeds a defined value, the electronic analysis system detects that the front passenger seat is occupied by a person and sends an occupied signal to the restraint systems control unit (N2/7) via the data line. The seat occupation status is recorded again at intervals of approx. 300 ms. Once the load is removed from the front passenger seat the occupied signal is retained for approx. 2 minutes. The signal is retained to prevent immediate shutoff of the safety devices if the load on the front passenger seat is removed for a short period.

Automatic child seat recognition
The functionality of the automatic child seat recognition is only given where a Mercedes-Benz approved and control-unit coded child seat are used. This child seat must be equipped with 2 transponders (resonators) which are located on the left and right side of the base. When the child seat is in position, the signals transmitted by the electronic analysis system via the transmitter antennas in the sensor mat are changed by the resonators in the child seat. The phase of the sinusoidal signals is shifted. The signals are picked up by the respective receiving antennas in the sensor mat and sent to the electronic analysis system. The electronic analysis system evaluates the signals and conveys the current status via the data line to the restraint systems control unit (N2/7): Child seat fitted or not fitted; child seat positioned incorrectly.

Through analysis of the two signals it is also possible to clearly detect the child seat alignment (in or against the direction of travel).

If the child seat is positioned incorrectly, the message: "CHILD SEAT IN CORRECT POSITION." appears in the multifunction display (A1p13) of the instrument cluster (A1).