Output of Crash Telegram
In the event of a collision involving triggering of the restraint systems, the Crash Safety Module sends a crash telegram to the users in the bus-system network. Parallel to this, the TCU is informed via a direct single-wire line to transmit an emergency call.
As a result, the respective control units perform the following functions depending on the crash severity:
CRASH SEVERITY FUNCTION CHART
| Function | Control Unit |
|---|---|
| Switch off electric fuel pump | Digital Motor Electronics DME |
| Switch off the auxiliary heating | Integrated automatic heating and air conditioning system IHKA (Not for US) |
| Release central locking | Junction box electronics JBE |
| Switch on hazard warning lights | Footwell module FRM |
| Switch on interior lights | Footwell module FRM |
| Transmit emergency call (only when airbag triggered) | Telematics Control Unit TCU |