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12 - Seat position sensor 13 - Passenger air bag deactivation switch 14 - Driver safety belt buckle switch 15 - Passenger safety belt buckle switch 16 - Impact sensor - left-hand front 17 - Impact sensor - right-hand front 18 - Side impact sensor - left-hand B-pillar 19 - Side impact sensor - right-hand B-pillar 20 - Side impact sensor - left-hand C-pillar 21 - Side impact sensor - right-hand C-pillar 22 - Driver lower air bag 23 - Adaptive steering column 24 - Side air bag – left-hand 25 - Side air bag – right-hand 26 - Clockspring 27 - Passenger air bag 28 - Driver air bag 29 - Curtain air bag – left-hand 30 - Curtain air bag – right-hand PRINCIPLES OF OPERATION Crash Sensing Impact sensor The impact sensors are installed in the front and both sides of the vehicle. W hen the ignition is switched on the Restraints Each impact sensor incorporates an accelerometer and a microchip powered by a feed from the restraints control module. If a fault is detected the relevant impact sensor sends a fault message, instead of the digital acceleration message, to Occupant Monitoring There are two types of occupant monitoring systems fitted to vehicles: 1. NAS markets, have an Occupant Classification Sensing System. 1. 2. Markets except NAS and Australia, have an Occupant Detection Sensing System. 2. 1. Occupant Classification Sensing System |