BMW 5 Series: Functions of the Advanced Crash Safety Module
The function of the Advanced Crash Safety Module is to permanently evaluate all sensor signals in order to identify a crash situation. Based on the sensor signals and their evaluation, the Advanced Crash Safety Module (ACSM) identifies the direction of the crash and the severity of the impact.
The Advanced Crash Safety Module (ACSM) evaluates the sensor information and then initiates the relevant measures for selective activation of the necessary restraint systems.
At the same time the Advanced Crash Safety Module (ACSM) monitors the system itself and indicates when it is ready for operation by switching off the airbag indicator light.
If an error occurs during operation this is stored in a fault memory The fault memory can be read out for diagnosis purposes.
If a crash situation is detected, a crash message is sent to the other bus users in the data bus network as notification. The relevant control units respond to this signal by executing their own activities according to the severity of the crash.
The activities include:
- Opening the central locking system
- Activating the hazard warning flasher
- Switching on the interior light
- Switching off the fuel pump control electronics
- Making an emergency call
An additional function of the Advanced Crash Safety Module is the acoustic seat belt warning that reminds the driver using visual and acoustic signals to fasten his seat belt. Seat belt buckle switches are used to identify whether the driver and the front passenger have their seat belts fastened. On motor vehicles in European version, the seat belt buckles in the rear passenger compartment are also monitored. In addition, for vehicles, the position of the driver's and the front passenger seat is monitored.
The functions of the Advanced Crash Safety Module generally belong to one of the following areas:
- Crash-relevant functions
- System monitoring functions
- Additional convenience functions
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Crash-relevant functions
The Advanced Crash Safety Module must fulfil the following crash-relevant
functions:
Evaluating the sensor signals
Impact detection
Determining actuators to be activated
Specifying the trigger t
System monitoring functions
The Advanced Crash Safety Module has the following system monitoring
functions:
System self-test (pre-drive check)
Display of system operability
Cyclic monitoring
Fault display and fault storage
Active protection
The standard equipment of the G30 already includes the Active Protection
safety package.
The Active Protection safety package comprises the following 3 functionally
independent subsystems:
PreCra
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Ethernet
On the G30 the 2-wire OABR Ethernet (OPEN Alliance BroadR-Reach) from the G12
is used.
The Ethernet variant with 5 lines (4 data lines and 1 activation line) is still
used on the G30 by the
OBD2 interface to the Body Domain Controller.
Use of 2-wire OABR Ethernet on the G30
The following control
Multifunction Steering Wheel
Overview
The buttons of the multifunction steering wheel in the G30 are unchanged
compared to those in G12.
Part of the assistance system is operated on the left side. Multimedia functions
are operated on the
right side.
The version of the control panel installed on the left side (assistance sys
