3363838 - E7030 AIRBAG - Functional description
Functional description
The Air Bag system control unit M60 receives a supply controlled by the ignition (INT) at pin 12 of connector A from the line protected by fuse F50 of the additional fuse box B2 . Pin 1 of connector A and pin 17 of connector B are connected to a specific earth C50. Early crash sensor K39 detects slight bumps and reports them to control unit M60 - pins 2 and 4 of connector A of M60 . Occupant classification sensor K65 records the weight and size of the front passenger seat occupant: the sensor is supplied by a line protected by fuse F50 of underfacia control unit B2 , and sends a signal to pin 19 of connector B of M60 .When a frontal impact of a certain severity (depending on the control strategy, data from the above two sensors and sensors incorporated in the control unit) is detected, the control unit sends control signals for stage 1 operation of the front modules:
- to driver's Air Bag Q9 , via the steering wheel clockspring D47 (from pins 23 and 24 of connector A of M60 ):
- to passenger side air bag Q11 (from pins 21 and 22 of connector A of M60 ):
- to the pretensioners on the driver's side Q20 (from pins 1 and 2 of connector B of M60 ) and the passenger side Q21 (from pins 3 and 4 of connector B of M60 ).
- to driver side rear pretensioners Q22 (from pins 15 and 16 of connector A of M60 ) and passenger side Q23 (from pins 13 and 14 of connector A of M60 );
When frontal impact of a certain severity is detected, the control unit sends control signals to set off the stage 2 front modules:
- to driver's Air Bag Q9 , via the steering wheel clockspring D47 (from pins 19 and 20 of connector A of M60 ):
- to passenger side air bag Q11 (from pins 17 and 18 of connector A of M60 ):
When side impact of a certain severity (dependent on the software setting) is detected, the control unit sends control signals to set off the modules:
- to driver's side front air bag Q30 (from pins 6 and 5 of connector B of M60 );
- to passenger side front air bag Q31 (from pins 9 and 10 of connector B of M60 );
- to driver's rear side bag Q43 (from pins 13 and 14 of connector B of M60);
- to passenger side rear air bag Q42 (from pins 15 and 16 of connector B of M60 );
- to the driver's Head Bag Q40 (from pins 7 and 8 of connector B of M60 );
- to the passenger Head Bag Q41 (from pins 12 and 11 of connector B of M60 ).