199002891 - E7030 AIR BAG - FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

The control unit for the Air Bag system M60 receives a supply controlled by the ignition (INT) at pin 2 of connector A from the line protected by fuse F58 of the Body Computer M1.Pin 1 connector A is connected to the specific earth C50.The early crash sensor K39 detects slight impacts and signals them to the control unit M60 and 12 of connector A of M60; pin 6 provides a reference earth.When, according to the control logic, the two sensors and the sensors incorporated in the actual control unit detect a slight frontal impact, the control unit sends signals for the intervention of the front modules in the first stage:- to the driver''s Air Bag Q9, via the clock spring on the steering wheel D47 (from pins 15 and 16 of connector A of M60 );- to the passenger Air Bag Q11 (from pins 13 and 14 of connector A of M60);- to the front driver''s pretensioners Q20 (from pins 19 and 20 of connector B of M60) and passenger side Q21 (from pins 17 and 18 of connector B of M60).If a more serious frontal impact is detected, the control unit sends signals for the intervention of the front modules in the second stage:- to the driver''s Air Bag Q9, via the clock spring on the steering wheel D47 (from pins 19 and 20 of connector A of M60 );- to the passenger Air Bag Q11 (from pins 17 and 18 of connector A of M60).The side impact detection sensors K66 (driver''s side) and K67 (passenger side) send signals to pins 4-2 and 3-1 of connector B of the control unit M60, respectively.When, on the basis of the control logic, a side impact of a certain severity is detected, the control unit sends signals for the intervention of the modules:- to the driver''s Head Bag Q40 (from pins 16 and 15 of connector B of M60)- to the passenger Head Bag Q41 (from pins 14 and 13 of connector B of M60).The structure of the seats which house the Side Bags is connected to earth C50.The switches on the driver''s seat belt I45 and the passenger side I46 are conntected to the control unit sending an earth signal to pins 5 -10 and 9 - 6 of connector B of M60 respectively.The passenger presence sensor K65 located on the seat sends a signal to pin 11- 7 of connector B of M60.The control unit M60 is connected via the CAN line to the Body Computer M1 and to the instrument panel E50.When the system autodiagnostic function detects a fault or an impact is recorded, the control unit M60 sends a signal, via the CAN, for the Air Bag fault warning light located in the instrument panel E50.Similarly, it lights up the passenger Air Bag disabled warning light and the seat belts not fastened warning light: