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8M - 2
RESTRAINT SYSTEM
DESCRIPTION AND OPERATION
AIRBAG CONTROL MODULE
The Airbag Control Module (ACM) contains the
impact sensor and energy reserve capacitor. The
impact sensor acts as a threshold sensitive switch
that completes a circuit when an impact provides suf-
ficient deceleration. The sensor is calibrated for the
specific vehicle and reacts to the severity and direc-
tion of the impact.
The ACM monitors the system to determine the
system readiness. The ACM stores sufficient energy
to deploy the airbags for approximately two minutes
after the battery is disconnected. The ACM contains
on-board diagnostics, and illuminates the AIRBAG
warning lamp in the cluster when a diagnostic trou-
ble code occurs. The warning equipment is tested for
a few seconds every time the vehicle is started.
CLOCKSPRING
The clockspring is mounted to the steering column
behind the steering wheel. The clockspring is used to
maintain a continuous electrical circuit between the
wiring harness and the:
• Driver's airbag module
• Speed control switches
• Horn switch
The clockspring consists of a flat, ribbon like, elec-
trically conductive tape that winds and unwinds with
the steering wheel rotation.
DRIVER AND PASSENGER AIRBAG MODULE
WARNING:
NEVER DISASSEMBLE THE DRIVER
AIRBAG MODULE THERE ARE NO OTHER SER-
VICEABLE PARTS IN THE MODULE.
The Driver Airbag Module located in the center of
the steering wheel and is the most visible part of the
system (Fig. 1). The airbag module contains a hous-
ing in which the cushion, inflator and cover are
attached to.
The driver side inflator assembly is mounted from
the back of the module housing. When supplied with
the proper electrical signal, the inflator assembly
produces a gas and discharges it directly into the
cushion. A protective cover is fitted to the front of the
Driver Airbag Module, forms a decorative cover, and
a horn contact area, in the center of the steering
wheel. The Driver Airbag Module is mounted directly
to the steering wheel.
WARNING:
NEVER DISASSEMBLE THE PASSEN-
GER AIRBAG MODULE, THERE ARE NO SERVICE-
ABLE PARTS WITHIN THE MODULE.
PASSENGER AIRBAG MOD
AIRBAG CONTROL MODULE
DATA LINK CONNECTORS
ULE
DRIVER AIRBAG MODULE
The Passenger Airbag Module is located beneath
the decorative cover of the instrument panel, facing
the passenger seat (Fig. 1).
The passenger inflator assembly is within the mod-
ule housing. The module is mounted to the instru-
ment panel retainer and support structure. When
supplied with the proper electrical signal the inflator
will produce a gas and discharge it directly into the
cushion. A protective cover is fitted into the instru-
ment panel over the airbag module and forms a dec-
orative cover.
Fig. 1 Driver and Passenger Airbags
The Passenger Airbag (PAB) Module consists of:
• Inflator assembly
• Reaction canister
• Airbag Pillow
• Deployment door
STRUCTURAL SEAT BELT SYSTEM
The structural seat with integrated Retractor Inte-
grated Height Adjuster allows the seat belts to com-
fortably fit a large range of occupants. The seat belts
are attached to the seat instead of the body, this
allows better passenger access to the rear seat.
Since the retractor is mounted on a seat back that
can recline, a typical seat back g-sensor cannot be
used in the retractor. Instead, a solenoid inside the
retractor is used to lock and unlock the seat belt
when electrically signaled by a remote g-sensor. The
remote g-sensor is located inside the Seat belt Con-
trol Timer Module. The Seat Belt Control Timer
Module is located under the center console. The seat
retractor and solenoid is located in the seat back and
is serviced as a assembly. The removal procedures
are located in Group 23, Body.
When the solenoids are powered, the seat belt can
be moved. When the solenoids are not powered, the
seat belts can not be extracted. This is necessary to
ensure that occupants are always safe, even in the
case of a power loss during an accident. Whether the
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