3315761 - E7030 AIRBAG - Functional description (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 5 by a line protected by fuse
F2
in junction unit
B1
.
Pin 14 is connected to the specific earth
C50
.
When an impact of a set severity
(determined by the control software) 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 1 and 2):
- to passenger airbag Q11 (from pins 3 and 4);
- to pretensioners - left-hand Q20 (from pins 10
and 11) and right-hand Q21 (from pins 6 and 7).
Pins 5 and 24 are connected to the passenger
Air Bag disabling switch
H75
.
When the system self-diagnostic function
detects a fault or an impact is detected, control unit
M60 sends
a signal -from pin 13 to pin 9 connector C of instrument panel
E50. - to the airbag anomaly warning light.
Pin 20 of
M60 sends a signal to the passenger
airbag disablement warning light at pin 16, connector C of instrument
panel E50.
These are earth signals and make the warning
lights come on because the instrument panel
E50 supply is controlled
by the ignition (INT/A) from the line protected by fuse F1 of the junction
unit B1.The red warning light is a 'smart' light;
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 9 of control unit
M60 is connected
to pin 3 of multiple diagnosis connector R10.