Restraint systems control unit data, function - GF82.95-P-3005SK
MODEL 171.4 with CODE (359) TELE AID emergency call system
The emergency call system control unit (N123/4) receives the messages listed below as a digital crash signal via a discrete line from the restraint systems control unit (N2/7) and also (redundant) from the central gateway control unit (N93) via the diagnosis Controller Area Network (data bus/CAN bus) (CAN). The central gateway control unit (N93) receives the message from the restraint systems control unit (N2/7) via the Controller Area Network Bus class B (interior) (CAN-B).
Crash data on diagnosis CAN
Byte no. 1
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-on 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)
Byte no. 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-on 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
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) transmits a signal on a discrete line every 500 ms and also (redundantly) via diagnosis CAN. This notifies the emergency call system control unit (N123/4) that the crash detection is operating correctly.
The restraint systems control unit (N2/7) performs a cyclic self-test. Illumination of the red light emitting diode (LED) in the SOS pushbutton switch (S93/3) during normal operation indicates a fault in the system. The relevant fault message appears in the display of the COMAND operating, display and control unit (A40/3) and the upper multifunction display (A1p13) of the instrument cluster (A1). The red LED remains on until circuit 15 is switched off or the fault is remedied. 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.
| TELE AID control unit, location/task/design/ function | GF82.95-P-4100SKU |
| SOS switch, location/task/design/function | GF82.95-P-4107SK |
| Supplemental restraint systems control unit, location/task/design | GF91.60-P-4018SK |