Dodge ZB 2005, Руководство по обслуживанию

Страница: 345 / 1873

DRIVER AIRBAG
DESCRIPTION
The driver airbag protective trim cover is the most
visible part of the driver airbag system. The driver
airbag is mounted directly to the steering wheel.
Located under the airbag cover are the horn switch,
the folded airbag cushion, and the airbag cushion
supporting components. The resistive membrane-type
horn switch is secured within a pocket on the airbag
cushion.
The airbag inflator is a non-azide, pyrotechnic-type
unit and is secured by four flanged hex nuts to four
studs on the airbag cushion retainer ring to the back
of the stamped metal airbag housing. A connector
receptacle on the driver airbag inflator connects the
inflator initiator to the vehicle electrical system
through a yellow-jacketed, two-wire pigtail harness of
the clock spring.
The driver airbag cannot be repaired and must be
replaced if deployed or in any way damaged. The
driver airbag cover and horn switch are not service-
able and if found faulty or defective, a complete
driver airbag assembly will need to be installed.
OPERATION
The driver airbag is deployed by electrical signals
generated by the Occupant Restraint Controller
(ORC) through the driver airbag squib circuit to the
initiator in the airbag inflator. When the ORC sends
the proper electrical signal to the initiator the elec-
trical energy generates enough heat to initiate a
small pyrotechnic charge which, in turn ignites
chemical pellets within the inflator. Once ignited,
these chemical pellets burn rapidly and produce a
large quantity of inert gas. The inflator is sealed to
the back of the airbag housing and a diffuser in the
inflator directs all of the inert gas into the airbag
cushion, causing the cushion to inflate. As the cush-
ion inflates, the driver airbag trim cover will split at
predetermined breakout lines, then fold back out of
the way along with the horn switch unit. Following
an airbag deployment, the airbag cushion quickly
deflates by venting the inert gas towards the instru-
ment panel through vent holes within the fabric used
to construct the back (steering wheel side) panel of
the airbag cushion.
REMOVAL
Follow all Warnings for airbag component service
(Refer to 8 - ELECTRICAL/RESTRAINTS - WARN-
ING).
CAUTION: When removing a DEPLOYED airbag,
rubber gloves, eye protection and long sleeved
shirt should be worn, as there may be deposits on
the surface which could irritate the skin and eyes.
(1) Open deck lid.
(2) Remove four bolts to battery compartment
cover and remove cover.
(3) Disconnect and isolate the battery negative
cable.
(4) Wait two minutes for the airbag system reserve
capacitor to discharge before beginning any airbag
system or instrument panel component service.
(5) Remove two bolts retaining Driver Airbag.
(6) Lift airbag and disconnect airbag and horn
wire connectors.
(7) Remove Driver Airbag from vehicle.
WARNING: WHEN REPLACING A DEPLOYED
DRIVER AIRBAG, THE CLOCK SPRING MUST ALSO
BE REPLACED (Refer to 8 - ELECTRICAL/RE-
STRAINTS/CLOCK SPRING - REMOVAL).
INSTALLATION
(1) Connect horn and airbag wiring connectors to
the airbag. Make airbag connection by pressing
straight in on the connector. The connector should be
fully seated to assure positive connection. Check that
the wires are not pinched between airbag and steer-
ing wheel during installation.
(2) Install the airbag screws and torque to 7 to 9
N·m (65 to 85 in. lbs.).
WARNING: DO NOT CONNECT BATTERY NEGATIVE
CABLE (Refer to 8 - ELECTRICAL/RESTRAINTS -
DIAGNOSIS AND TESTING - AIRBAG SYSTEM).
(3) Place battery access cover into place and install
four bolts.
(4) Close deck lid.
(5) Verify vehicle and system operation.
OCCUPANT RESTRAINT
CONTROLLER
DESCRIPTION
The Occupant Restraint Controller (ORC) is also
sometimes referred to as the Airbag Control Module
(ORC). The ORC is concealed underneath the instru-
ment panel, beneath the center stack area, just
behind the HVAC control and radio. It is secured by
four screws to a stamped steel mounting bracket
welded onto the top of the transmission tunnel. Con-
cealed within the aluminum ORC housing is the elec-
tronic
circuitry of the ORC which includes a
microprocessor, an electronic impact sensor, an elec-
tronic safing sensor, and an energy storage capacitor.
A stamped metal cover plate is secured to the bottom
8O - 6 RESTRAINTS
ZB