Dodge Viper SRT-10 (ZB). Manual — part 87
(4) Wait two minutes for the airbag system reserve
capacitor to discharge before beginning any airbag
system or instrument panel component service.
(5) Remove six allen screws to shifter bezel.
(6) Remove shifter shaft with knob and body.
(7) Remove floor console bezel and parking brake
body.
(8) Remove eight screws and disconnect one elec-
trical connector to center console and remove console
from vehicle.
(9) From underneath console, remove three retain-
ing screws to the passenger airbag ON/OFF switch
and remove from center console.
INSTALLATION
(1) Reach underneath console, place passenger air-
bag ON/OFF switch into position and install the
three retaining screws.
(2) Place center console into position in vehicle,
connect one electrical connector and install eight
screws.
(3) Install parking brake body and floor console
bezel.
(4) Install shifter shaft with knob and body.
(5) Install six allen screws to shifter bezel.
WARNING: DO NOT CONNECT BATTERY NEGATIVE
CABLE (Refer to 8 - ELECTRICAL/RESTRAINTS -
DIAGNOSIS AND TESTING - AIRBAG SYSTEM).
(6) Place battery access cover into place and install
four bolts.
(7) Close deck lid.
(8) Verify vehicle and system operation.
SEAT BELT & RETRACTOR
REMOVAL
(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) Fold convertible top down.
(6) Adjust seat to the farthest forward position.
(7) Remove lower seat belt anchor bolt.
(8) Using a trim stick (special tool #C-4755) or
equivalent, gently pry up on the sill plate and
remove from vehicle.
(9) Using a trim stick or equivalent, pry out rub-
ber plugs at sport hoop.
(10) Remove the two bolts attaching the sport hoop
to rear bulkhead.
(11) Remove sport hoop from vehicle.
(12) Remove three screws retaining the rear bulk-
head panel. One screw located at console and two
screws located at door edge.
(13) Pull edge of panel out far enough to place a
block (2 X 4) between it and the rear bulkhead.
(14) Move carpet out of the way to access seat belt
and retractor.
(15) Disconnect the electrical connector at the
retractor assembly.
(16) Remove two bolts to seat belt retractor.
(17) Fish seat belt through guides and remove.
(18) Remove seat belt and retractor assembly from
vehicle.
INSTALLATION
(1) Place seat belt and retractor assembly into
position.
(2) Fish seat belt through guides.
(3) Install two bolts to seat belt retractor. Torque
bolts to 40 N·m (30 ft. lbs.).
(4) Connect the electrical connector at the seat belt
retractor.
(5) Replace carpet that was moved aside to access
the seat belt and retractor.
(6) Pull block (2 X 4) out from in between bulk-
head and rear bulkhead panel.
(7) Install the three screws retaining the rear
bulkhead panel. One screw located at console and
two screws located at door edge.
(8) Place sport hoop in position in vehicle. Install
the two retaining bolts to sport hoop. Torque bolts to
28 N·m (21 ft. lbs.).
(9) Install the two rubber plugs at sport hoop.
(10) Place the sill plate into position on the retain-
ing slots and firmly snap into place.
(11) Install the lower seat belt anchor bolt. Torque
bolt to 40 N·m (30 ft. lbs.).
(12) Readjust seat to the previous customer posi-
tion.
(13) Put convertible top up.
WARNING: DO NOT CONNECT BATTERY NEGATIVE
CABLE (Refer to 8 - ELECTRICAL/RESTRAINTS -
DIAGNOSIS AND TESTING - AIRBAG SYSTEM).
(14) Place battery access cover into place and
install four bolts.
(15) Close deck lid.
(16) Verify vehicle and system operation.
8O - 12
RESTRAINTS
ZB
PASSENGER AIRBAG ON / OFF SWITCH (Continued)
SEAT BELT BUCKLE
REMOVAL
(1) Open deck lid.
(2) Remove four bolts to battery compartment
cover and remove cover.
(3) Disconnect and isolate the battery negative
cable.
(4) Move seat as needed to access seat retaining
bolts (Fig. 3).
(5) Disconnect electrical connector (Fig. 4).
(6) Remove seat belt buckle bolt.
(7) Separate seat belt buckle from seat and remove
wire from seat assembly.
INSTALLATION
(1) Route wire through seat assembly and attach
seat belt buckle and bolt to seat assembly. Torque
bolts to 40 N·m (30 ft. lbs.).
(2) Place seat assembly in vehicle.
(3) Connect electrical connector (Fig. 4).
(4) Move seat as needed to install seat retaining
bolts (Fig. 3). Torque bolts to 40 N·m (30 ft. lbs.).
(5) Connect the battery negative cable.
(6) Place battery access cover into place and install
four bolts.
(7) Close deck lid.
(8) Verify vehicle and system operation.
Fig. 3 BUCKET SEAT
1 - BUCKET SEAT
2 - FLOOR PAN
Fig. 4 SEAT ELECTRICAL CONNECTOR
1 - SEAT BACK
2 - WIRE CONNECTOR
ZB
RESTRAINTS
8O - 13
SEAT BELT SWITCH
DESCRIPTION
The Seat Belt Switch is a Hall Effect-type sensor.
This sensor consists of a fixed-position, Hall Effect
Integrated Circuit (IC) chip and a small permanent
magnet that is integral to the left seat belt buckle.
The left seat belt buckle is located on a stamped steel
stanchion within a molded plastic scabbard and
secured with a screw to the left side of the transmis-
sion tunnel. The seat belt switch is connected to the
vehicle electrical system through a two-lead pigtail
wire and connector on the left seat belt buckle, which
is connected to a wire harness connector in the body
wire harness. A radio noise suppression capacitor is
connected in parallel with the IC where the two pig-
tail wire leads connect to the IC pins.
The seat belt switch cannot be adjusted or repaired
and, if faulty or damaged, the entire left seat belt
buckle must be replaced.
OPERATION
The seat belt switch is designed to provide a status
signal to the seat belt switch sense input of the Occu-
pant Restraint Controller (ORC) indicating whether
the left seat belt is fastened. The ORC uses the seat
belt switch input as a factor in determining what
level of force with which it should deploy the multi-
stage driver and passenger airbags. In addition, the
ORC sends electronic messages to the ElectroMe-
chanical Instrument Cluster (EMIC) to control the
seat belt indicator based upon the status of the left
seat belt switch.
A spring-loaded slide with a small window-like
opening is integral to the buckle latch mechanism.
When a seat belt tip-half is inserted and latched into
the seat belt buckle, the slide is pushed downward
and the window of the slide exposes the Hall Effect
Integrated Circuit (IC) chip within the buckle. The
field of the permanent magnet induces a current
within the chip. The chip provides this induced cur-
rent as an output to the ORC, which monitors the
current to determine the status of the left seat belt.
When the seat belt is unbuckled, the spring-loaded
slide moves upward and shields the IC from the field
of the permanent magnet, causing the output current
from the seat belt switch to be reduced.
The seat belt switch receives a supply current from
the ORC, and the ORC senses the status of the left
seat belt through its pigtail wire connection to the
airbag overlay wire harness. The ORC also monitors
the condition of the seat belt switch circuit and will
illuminate the airbag indicator in the EMIC then
store a Diagnostic Trouble Code (DTC) for any fault
that is detected in the seat belt switch circuit. To
properly diagnose the seat belt switch, a DRBIII
t
scan tool and the appropriate Body Diagnostic Proce-
dures manual must be used.
SEAT BELT TENSIONER
DESCRIPTION
Seat belt Tensioners supplement the airbag sys-
tem. The seat belt tensioners are integral to the front
seat belt retractor units, which are secured to the
vehicle frame and are concealed behind the rear
bulkhead trim. The seat belt tensioner consists pri-
marily of a sprocket/pinion, a steel tube, a cast metal
housing, numerous steel balls, a stamped metal ball
trap, a torsion bar, a small pyrotechnically activated
gas generator, and a short pigtail wire. All of these
components are located on one side of the retractor
spool on the outside of the retractor housing except
for the torsion bar, which serves as the spindle upon
which the retractor spool rides. The seat belt tension-
ers are controlled by the Occupant Restraint Control-
ler (ORC) and are connected to the vehicle electrical
system.
The seat belt tensioners cannot be repaired and, if
faulty or damaged, the entire front seat belt and
retractor unit must be replaced. If the front airbags
have been deployed, the seat belt tensioners have
also been deployed. The seat belt tensioners are not
intended for reuse and must be replaced following
any airbag deployment. The tensioner is a one time
pyrotechnic device. A growling or grinding sound
while attempting to operate the seat belt retractor is
a sure indication that the seat belt tensioner has
been deployed and requires replacement.
OPERATION
The seat belt tensioners are deployed in conjunc-
tion with the airbags by a signal generated by the
Occupant Restraint Controller (ORC) through the
driver or passenger seat belt tensioner line 1 and line
2 (or squib) circuits. When the ORC sends the proper
electrical signal to the tensioners, the electrical
energy generates enough heat to initiate a small
pyrotechnic gas generator. The gas generator is
installed in one end of a steel tube that contains
numerous steel balls. As the gas expands, it pushes
the steel balls through the tube into a cast metal
housing, where a ball guide directs the balls into
engagement with the teeth of a sprocket that is
geared to one end of the retractor spool. As the balls
drive past the sprocket, the sprocket turns and drives
the seat belt retractor spool causing the slack to be
removed from the front seat belts. The ball trap cap-
tures the balls as they leave the sprocket and are
expelled from the housing.
8O - 14
RESTRAINTS
ZB
Removing excess slack from the front seat belts not
only keeps the occupants properly positioned for an
airbag deployment following a frontal impact of the
vehicle, but also helps to reduce injuries that the
occupant might experience in these situations as a
result of harmful contact with the steering wheel,
steering column, instrument panel and/or windshield.
Also, the seat belt tensioner torsion bar that the
retractor spool rides upon is designed to deform in
order to control the loading being applied to the occu-
pants by the seat belts during a frontal impact, fur-
ther reducing the potential for occupant injuries.
The ORC monitors the condition of the seat belt
tensioners through circuit resistance, and will illumi-
nate the airbag indicator in the ElectroMechanical
Instrument Cluster (EMIC) and store a Diagnostic
Trouble Code (DTC) for any fault that is detected.
For proper diagnosis of the seat belt tensioners, use a
DRBIII
t scan tool and the proper Body Diagnostic
Procedures manual.
WARNING:
WHEN
THE
FRONT
AIRBAG
IS
DEPLOYED,
THE
TENSIONER
WILL
HAVE
DEPLOYED AND MUST BE REPLACED. THIS WILL
REQUIRE
THE
ENTIRE
FRONT
SEAT
BELT
&
RETRACTOR ASSEMBLY TO BE REPLACED.
ZB
RESTRAINTS
8O - 15
SEAT BELT TENSIONER (Continued)
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