Vehicle`s front/lateral safety air bag activating system for e.g. protecting passenger from frontal collision, has control unit calculating sum of current and detecting failure in wires when difference between current is higher than level

摘要

The system (1) has an electronic control unit (2) to detect current (Ih, Il) circulating in communication wires (4a, 4b). A sensor unit (3) has an electronic accelerometer to detect an acceleration generated during collision of a vehicle against another vehicle, and varies the current based on an output data of the accelerometer. The control unit calculates a sum of the current and compares the sum to a preset level to detect the output data. The control unit calculates a difference between the current and detects a failure in the wires when the difference is higher than another preset level. An independent claim is also included for a method of activating a safety device for a passenger in a vehicle.