3315762 - E7030 AIRBAG - Functional description (Air Bag laterale, Euro 3)
Functional description
The airbag system control unit
M60 is
supplied with power when the ignition switch is turned on (INT/A)
at pin 2 by a line protected by fuse F2 in junction unit B1.
Pin 1 of connector B is connected to the
special earth
C50.When frontal impact of a certain
severity (depending on the software setting) is detected, the control
unit sends control signals to set off the modules:
- to driver's Air Bag Q9, via the steering wheel clockspring
Q10 (from pins 21 and 22 of connector B):
- to the passenger airbag Q11 (from pins 23 and 24 of
connector B).
- to the driver's pretensioner Q20 (from pins 13 and
14 of connector A) and the passenger pretensioner Q21 (from pins
15 and 16 of connector A).
Pin 7 connector B is connected to the passenger
Air Bag disabling switch
H75.
The side impact detection sensors
K66
(driver's side) and
K67
(passenger side) send signals to
pins 1, 2, 3 and 4 respectively of connector B of the control unit
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 the driver's side Air Bag Q30 (from pins 21 and
22 of connector A).
- to the passenger side Air Bag Q31 (from pins 23 and
24 connector A);
Both pins 4 of devices
Q30 and Q31 are
connected to earth C50.
When the system self-diagnostic function
detects a fault or an impact is detected, control unit
M60 sends
a signal -from pin 10 of connector B - to the Air Bag fault warning
light located in the instrument panel E50, pin 9 of connector C.
Pin 9 of
M60 sends a signal to the passenger
sidebag disablement warning light, again located on instrument panel
E50 - pin 16 of connector C.
These signals are earthed; Instrument
E50
is ignition-activated (INT/A) - pin 15 of connector A - from a line
protected by fuse F1 of junction unit B1.Both warning lights are smart type; in other
words, an inner control circuit causes the warning light to light
up even if the connection is broken or if the circuit connecting warning
light and control unit is short-circuited to earth.
Pin 3 of control unit
M60 is connected
to pin 3 of multiple test connector R10.