Restraint system control unit data, function - GF82.95-P-3005GQU

MODEL 164.1 with CODE (359) TELE AID emergency call system as of model year 09/YoM 08 model refinement package 

MODEL 164.8 with CODE (359) TELE AID emergency call system as of model year 09/YoM 08 

Function requirements 

- Status "Circuit 15R ON"

- Proper communication with restrain systems control unit (N2/7)

- Automatic crash recognition including crash level by restraint systems control unit

General 

In the event of an accident with airbag actuation, an automatic emergency call (E-Call) is transmitted immediately. An emergency call is sent out regardless of the severity of the accident.

Function sequence 

The emergency call system control unit (N123/4) receives the crash data on the one hand via a discrete line as digital crash signal from the restraint systems control unit and, on the other hand, of the following (redundant) path, including crash level:

- Engine compartment CAN

- Central gateway control unit (N93)

- Diagnostic CAN

The restraint systems control unit sends a LIFE signal (the LIFE signal is the "life sign" from the restraint systems control unit) every t = 500 ms over the same path as the crash information including crash level. This allows the emergency call system control unit to permanently monitor communication with the restrain systems control unit and proper function of the crash recognition.