198000674 - 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 F50 of the junction unit under the dashboard B2.Pin 1 connector A is connected to the specific earth C50.The early crash sensor K39 detects light impacts and communicates them to the control unit M60 - pins 11 and 12 of connector A of M60 .When, according to the control logic, the two sensors and the sensors incorporated into 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 driver side knee bag Q14 (from pins 17 and 18 of connector A of M60);- to the front driver''s pretensioners Q20 (from pins 15 and 16 of connector B of M60) and passenger side Q21 (from pins 13 and 14 of connector B of M60).- to the rear pretensioners Q22 (from pins 20 and 21 of connector B of M60) and Q23 (from pins 18 and 19 of connector B of M60).If a more serious front impact is detected, the control unit sends signals for the second stage activation of the front modules 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.The side impact detection sensors K66 (driver''s side) and K67 (passenger side) send signals to pins 25-24 and 22-23 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 front Side Bag Q30 (from pins 11 and 12 of connector B of M60);- to the front passenger Side Bag Q31 (from pins 19 and 10 of connector B of M60);- to the driver''s Head Bag Q40 (from pins 3 and 4 of connector B of M60)- to the passenger Head Bag Q41 (from pins 1 and 2 of connector B of M60).The structure of the seats which house the Side Bags is connected to earth C50.The switch on the driver''s seat belt I46 and the passenger seat belt I47 are connected to the control at pins 28 and 26 of connector B of M60 respectively, whilst pin 27 provides the reference earth.The passenger presence sensor K65 located on the seat sends a signal to pins 29 and 3 of connector B of M60.The control unit M60 is connected via the CAN line from pins 7 and 8 of connector A 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: