Active Restraints; Passive Restraints; Srs Logo - Mercedes-Benz 2005 Sprinter Service Manual

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VA
RESTRAINTS (Continued)

ACTIVE RESTRAINTS

The active restraints for this model include:
• Front Seat Belts - Both outboard front seating
positions are equipped with three-point seat belt sys-
tems employing a lower B-pillar mounted inertia
latch-type retractors, height-adjustable upper B-pil-
lar mounted turning loops, travelling lower seat belt
anchors secured to the outboard seat tracks, and
travelling end-release seat belt buckles secured to
the inboard seat track. The driver side front seat belt
buckle of all models includes an integral seat belt
switch that detects whether its seat belt has been
fastened.
• Rear Seat Belts - All rear seating positions are
equipped with three-point seat belt systems. Each
rear seating position belt employs an integral seat
cushion frame mounted inertia latch-type retractor, a
fixed position upper seat back frame mounted turn-
ing loop, and a fixed lower seat belt anchor secured
to the seat cushion frame. All rear seat belts have
fixed end-release seat belt buckles that are also
secured to the seat cushion frame.

PASSIVE RESTRAINTS

A Next Generation driver airbag is standard facto-
ry-installed safety equipment on this model, while a
passenger side front airbag is optional. This airbag
system
is
a
passive,
Restraint System (SRS) and vehicles with this equip-
ment can be readily identified by the "SRS - AIR-
BAG" logo molded into the driver airbag trim cover
in the center of the steering wheel and, if the vehicle
is so equipped, also into the passenger airbag door on
the instrument panel above the glove box (Fig. 2).
Vehicles with the airbag system can also be identified
by the airbag indicator, which will illuminate in the
instrument cluster for about six seconds as a bulb
test each time the ignition switch is turned to the On
position. A pyrotechnic-type seat belt tensioner is
integral to the front seat belt retractor mounted on
the lower B-pillar on the driver side, and to the pas-
senger side retractor of vehicles equipped with the
optional passenger side airbag.
The supplemental restraint system includes the
following major components, which are described in
further detail elsewhere in this service information:
• Airbag Control Module - The Airbag Control
Module (ACM) is located on a mount on the floor
panel within the driver side seat riser, beneath the
driver seat in the passenger compartment.
• Airbag (SRS) Indicator - The airbag indicator
is integral to the ElectroMechanical Instrument Clus-
ter (EMIC), which is located on the instrument panel
in front of the driver.
inflatable,
Supplemental
Fig. 2 SRS Logo
• Clockspring - The clockspring is located near
the top of the steering column, directly beneath the
steering wheel.
• Driver Airbag - The driver airbag is located in
the center of the steering wheel, beneath the driver
airbag trim cover.
• Driver Knee Blocker - The structure of the
lower instrument panel serves as a knee blocker for
the driver.
• Passenger Airbag - The optional passenger air-
bag is located within the instrument panel, behind
the passenger airbag door on the instrument panel
above the glove box on the passenger side of the vehi-
cle.
• Passenger Knee Blocker - The structure of
the glove box door and the lower instrument panel
serve as a knee blocker for the front seat passenger.
• Seat Belt Tensioner - A seat belt tensioner is
integral to the driver side front seat belt retractor
unit, and to the passenger side front seat belt retrac-
tor unit on vehicles equipped with an optional pas-
senger airbag.
The ACM contains a central processing unit and
programming that allows it to communicate on a
serial data bus diagnostic circuit connected to the
16-way Data Link Connector (DLC) located below the
left end of the instrument panel. This method of com-
munication is used for initialization of the ACM and
for diagnosis of the SRS circuits and components
using a DRBIII scan tool.
Hard wired circuitry connects the supplemental
restraint system components to each other through
the electrical system of the vehicle. These hard wired
circuits are integral to several wire harnesses, which
are routed throughout the vehicle and retained by
many different methods. These circuits may be con-
nected to each other, to the vehicle electrical system,
and to the supplemental restraint system compo-
nents through the use of a combination of soldered
RESTRAINTS 8O - 3

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