3310045 - E7030 AIRBAG - Description (Euro 3)
Description
The car may be fitted with an electronically-controlled
safety system that sets off the front seat belt pretensioners and
the driver's air bag, passenger air bag and sidebags in the case of
frontal and/or side impact of a certain severity.An electronic control unit manages the entire
system by controlling all the components and activating the restraint
systems (pretensioners and airbags) as necessary.The control unit has two different
intervention levels:
- at the first level only the pretensioners are activated
- the second level the system operates both airbags and
pretensioners.
The control unit is located under the centre
console of the vehicle and is fixed securely to the bodyshell. in
this way, the deceleration sensors located inside the unit are close
to the centre of gravity and measure whole car deceleration accurately.The driver's Air Bag module is located at
the centre of the steering wheel; it is fitted on a tilting plate
which enables the horn to be operated. The plate houses a metal
container which holds the folded air bag and a gas generator that
inflates the bag. A clock spring device allows the air bag
module connection leads to turn with the steering wheel without
the risk of breakage. The passenger Air Bag module is located
in the dashboard, above the glove compartment and is fixed directly
to the vehicle crossmember by means of a special bracket.The passenger Air Bag can be deactivated
manually by means of a specific switch.The switch, which is ignition-activated,
is located at the end of the facia on the passenger side and is
accessible only with the door open. When the key is turned to OFF,
the control unit also controls the activation of a passenger air
bag disablement warning light on the instrument panel.The pretensioner is a device built into
the front seat belt reel.They intervene, in the case of an impact
of a certain magnitude, to recover the inevitable extension of the
belts due to the action of the body weight, keeping the body close
to the seat backrest.The control unit is self-diagnostic:
- it detects and memorizes any faults
- it recognizes the various components and the type of fault
- it signals the onset of these faults via the special warning
light.
System activations following a particularly
serious impact are memorized by the control unit.For further details, see DESCRIPTION AND
OPERATION 5580E.The system control unit supply line is protected
by a fuse located in the junction unit. | carefully observe the safety regulations
when working on the airbag system. For further details see PROCEDURES
5580C' |