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Passenger Protection
Airbag control unit J234
The function of the airbag electronics is to sense vehicle deceleration and to evaluate it such that vehicle impact is reliably detected. Depending on impact severity, the appropriate restraint systems (airbag/belt tensioner) and the crash output are activated on the basis of various general conditions in the vehicle.
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Main functions of airbag electronics:
– Crash detection
– Correctly timed triggering of airbags and belt tensioners
– Correctly timed recognition of input information
– Permanent monitoring of entire airbag system
– Independent power supply via capacitor for a defined period (approx. 150 ms)
– Fault indication by way of failure warning lamp
– Storage of fault and crash information
– Signalling of crash to other system components via drive system CAN or discrete
(conventional wiring) crash output
In addition to the internal sensors in the control unit, use is made of external crash sensors for detecting vehicle impact deceleration.
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Key Features
- Mobile phone installation with voice control
- Echo compensation and speed-dependent volume control
- Center loudspeaker for enhanced acoustics
- BOSE sound system with 6-channel actuation
- Advanced control unit networking
- Transportation mode for minimizing power consumption
- Selective convenience CAN sleep mode
- Master function for terminal 15 continued operation
- Load management for electrical system stability