Restraint system control unit data, function - GF82.95-P-3005SZ
MODEL 215.3, 220.0 /1 with CODE (383a) Tele-Aid fixed installation telephone with CODE (494a) USA version
The telecommunications control unit (N112) receives the messages listed in the following as a digital crash signal from the restraint systems control unit (N2/7) via a discrete line and additionally (redundantly) via the Media Oriented System Transport (MOST) from the audio gateway control unit (N93/1). The audio gateway control unit (N93/1) receives the message via the Controller Area Network Bus Class B (interior) (CAN-B) from the restraint systems control unit (N2/7).
Crash data
| Bit No. | Crash level | Type of accident |
|---|---|---|
| Bit 0 | CRASH_A | Head-on collision 1 |
| Bit 1 | CRASH_B | Rear end collision 1 |
| Bit 2 | CRASH_C | Head-on collision 5 |
| Bit 3 | CRASH_D | Side collision 1 |
| Bit 4 | CRASH_E | Rear end collision 2 |
| Bit 5 | CRASH_F | Head-on collision 2 |
| Bit 6 | CRASH_G | Rollover 1 |
| Bit 7 | CONF_CRASH | Confirmation bit (from byte 1, 2) |
| Bit No. | Crash level | Type of accident |
|---|---|---|
| Bit 0 | CRASH_H | Rollover 2 |
| Bit 1 | CRASH_I | Rollover 3 |
| Bit 2 | CRASH_K | Rear end collision 3 |
| Bit 3 | CRASH_L | Side collision 2 |
| Bit 4 | CRASH_M | Not assigned |
| Bit 5 | CRASH_N | Not assigned |
| Bit 6 | CRASH_G | Not assigned |
| CRASH_O | Not assigned | |
| Bit 7 | CRASH_P | Not assigned |
An automatic emergency call is made in the event of an accident. This occurs no matter how severe the detected accident actually is.
Error messages
The restraint systems control unit (N2/7) sends a signal every 500 ms. This is done to indicate to the telecommunications control unit (N112) that the crash detection function is working properly.
The restraint systems control unit (N2/7) cyclically carries out a self-test. An error in the system during normal operation is indicated, if the red LED in the SOS switch (S93/3s1) lights up. The corresponding error message is displayed in the COMAND operating, display and control unit (A40/3) and in the multifunction display (A1p13) of the instrument cluster (A1). The red LED remains on until circuit 15 is switched off or the fault is rectified. The SOS switch (S93/3s1) is monitored. The system detects when an SOS switch (S93/3s1) is stuck. False signals are ignored and the system remains operational.
| SOS switch, location/task/design/function | GF82.95-P-4107SX | ||
| Telecommunications control unit, location/task/design/function | GF82.70-P-3114SU | ||
| Emergency tensioning retractor with airbag control unit, location/task/design/function | GF91.60-P-4006B |