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Home >> Mercedes Benz >> 2006 >> C 280 4MATIC (203.092) V6-3.0L (272.941) >> Repair and Diagnosis >> Relays and Modules >> Relays and Modules - Accessories and Optional Equipment >> Emergency Contact Module >> Description and Operation >> GF82.95-P-3005PM Restraint System Control Unit Data, Function

GF82.95-P-3005PM Restraint System Control Unit Data, Function




GF82.95-P-3005PM Restraint System Control Unit Data, Function

MODEL 203.0 /2 /7
- with CODE (359) TELE AID emergency call system
- up to Model Year 8

The emergency call system control unit (N123/4) receives the following messages via a direct digital crash signal from the restraint systems control unit (N2/7) and also (redundant) via the Controller Area Network (data bus/CAN bus) (CAN) diagnosis from the central gateway control unit (N93) (up to 30.11.04) or from the EIS control unit (N73) (as from 1.12.04). The central gateway control unit (N93) (up to 30.11.04) or the EIS control unit (N73) (as from 1.12.04) receives the message over the Controller Area Network bus Class B (interior) (CAN-B) from the restraint systems control unit (N2/7).

Crash data on CAN diagnosis











The crash is automatically detected by the restraint systems control unit (N2/7). The emergency call system control unit (N123/4) receives the crash information, on the one hand, via a direct digital crash signal from the restraint systems control unit (N2/7), and on the other hand additionally (redundant) via the CAN-B from the central gateway control unit (N93) (up to 30.11.04) or from the EIS control unit (N73) (as from 1.12.04). In the event of an accident, an automatic emergency call is made immediately. This occurs no matter how severe the detected accident actually is.

Error messages
The restraint systems control unit (N2/7) emits a life signal every 500 ms. Thus, the emergency call system control unit (N123/4) is notified of proper operation of the crash detection system.

The restraint systems control unit (N2/7) cyclically performs a self test. If the red LEDs in the SOS pushbutton switch (S93/3) light up, this indicates - under normal operating conditions - a system fault. The corresponding error message (status message) appears in the display of the COMAND operating, display and control unit (A40/3) and the multifunction display (A1p13) of the instrument cluster (A1). The red LEDs remain on until either circuit 15 is switched off or the error is eliminated. The SOS pushbutton switch (S93/3) is monitored. A stuck SOS pushbutton switch (S93/3) is detected. False signals are ignored and the system remains operational.





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