2005 CHRYSLER VOYAGER ail

restraint system protection in case there is a loss of
battery current supply to the ORC during an impact.
Two sensors are contained within the ORC, an
electronic impact sensor and a safing sensor. The
ORC also monitors inputs from eight remote impact
sensors. Two front impact sensors are located on each
outboard side of the lower radiator support, and
three side impact sensors are located on each side of
the vehicle at the B-pillar, in the lower sliding door
opening in front of the C-pillar, and over the rear
wheel well between the C and D-pillars. The elec-
tronic impact sensors are accelerometers that sense
the rate of vehicle deceleration, which provides veri-
fication of the direction and severity of an impact.
The safing sensor is an electronic accelerometer
sensor within the ORC that provides an additional
logic input to the ORC microprocessor. The safing
sensor is used to verify the need for a supplemental
restraint deployment by detecting impact energy of a
lesser magnitude than that of the primary electronic
impact sensors, and must exceed a safing threshold
in order for the airbags to deploy. Vehicles equipped
with curtain airbags, there is a second safing sensor
within the ORC to provide confirmation to the ORC
microprocessor of side impact forces. This second saf-
ing sensor is a bi-directional unit that detects impact
forces from either side of the vehicle.
Pre-programmed decision algorithms in the ORC
microprocessor determine when the deceleration rate
as signaled by the impact sensors and the safing sen-
sors indicate an impact that is severe enough to
require supplemental restraint system protection
and, based upon the severity of the monitored
impact, determines the level of front airbag deploy-
ment force required for each front seating position.
When the programmed conditions are met, the ORC
sends the proper electrical signals to deploy the dual
multistage front airbags at the programmed force
levels, the front seat belt tensioners and, if the vehi-
cle is so equipped, either curtain airbag. For vehicles
equipped with the OCS, the passenger front airbag
and seat belt tensioner will be deployed by the ORC
only if enabled by the OCM messages (PAD indicator
OFF) at the time of the impact.
To diagnose and test the ORC and all airbag sys-
tem components, use a scan tool and the appropriate
diagnostic information.
REMOVAL
WARNING: Never replace both the Occupant
Restraint Controller (ORC) and the Occupant Clas-
sification Module (OCM) at the same time. If both
require replacement, replace one, then perform the
Airbag System test (Refer to 8 - ELECTRICAL/RE-
STRAINTS - DIAGNOSIS AND TESTING - AIRBAGSYSTEM) before replacing the other. Both the ORC
and the OCM store Occupant Classification System
(OCS) calibration data, which they transfer to one
another when one of them is replaced. If both are
replaced at the same time, an irreversible fault will
be set in both modules and the OCS may malfunc-
tion and result in personal injury or death.
(1) Disconnect and isolate the battery negative
cable.
(2)
WARNING: Wait two minutes for the airbag system
reserve capacitor to discharge before beginning
any airbag system or component service. Failure to
do so may result in accidental airbag deployment,
personal injury or death.
(3) Remove storage bin from instrument panel
(Refer to 23 - BODY/INSTRUMENT PANEL/STOR-
AGE BIN - REMOVAL).
(4) Remove three bolts holding ORC to floor
bracket (Fig. 39).
(5) Disconnect the wire connectors from the ORC
(Fig. 39).
(6) Remove the ORC from vehicle.
INSTALLATION
WARNING: Do not install ORC if mounting location
is deformed or damaged. This will cause the ORC
to be improperly located and could result in occu-
pant personal injury or death.
WARNING: Use correct screws when installing the
ORC.
Fig. 39 ORC - REMOVE/INSTALL
1 - ORC ELECTRICAL CONNECTORS
2 - ORC
3 - ORC MOUNTING SCREWS
RSRESTRAINTS8O-29
OCCUPANT RESTRAINT CONTROLLER (Continued)

WARNING: Wait two minutes for the airbag system
reserve capacitor to discharge before beginning
any airbag system or component service. Failure to
do so may result in accidental airbag deployment,
personal injury or death.
(4) Clean powder residue from interior of vehicle
(Refer to 8 - ELECTRICAL/RESTRAINTS - STAN-
DARD PROCEDURE - SERVICE AFTER AN AIR-
BAG DEPLOYMENT).
(5) Remove instrument panel (Refer to 23 - BODY/
INSTRUMENT PANEL/INSTRUMENT PANEL
ASSEMBLY - REMOVAL).
(6) Remove all reusable components from the
upper instrument panel and transfer to the new
instrument panel.
UNDEPLOYED AIRBAG
(1) Open hood.
(2) Disconnect and isolate the battery negative
cable.
(3)
WARNING: Wait two minutes for the airbag system
reserve capacitor to discharge before beginning
any airbag system or component service. Failure to
do so may result in accidental airbag deployment,
personal injury or death.
(4) Remove center console bin between front seats.
(5) Remove left front door sill plate using a trim
stick (special tool #C-4755) or equivalent, and gently
prying up on sill plate.
(6) Remove left cowl panel using a trim stick or
equivalent, and gently prying out on cowl panel.
(7) Remove four screws to lower steering column
cover and remove cover.
(8) Unsnap parking brake lever from knee blocker
reinforcement.
(9) Remove Data Link Connector (DLC) from knee
blocker.
(10) Remove screws to knee blocker.
(11) Unsnap left A-pillar lower extension trim
using a trim stick or equivalent.
(12) Remove three left side instrument panel A-pil-
lar retaining bolts and loosen the instrument panel
roll down bolt.
(13) Remove four nuts at brake pedal support
bracket to instrument panel.
(14) Using a trim stick or equivalent, gently pry
off left side upper A-pillar trim.
(15) Remove six screws and two wiring connectors
to lower instrument panel cubby bin at bottom of
center stack.
(16) Remove two left side nuts at instrument panel
center stack support to floor.(17) Remove two right side nuts at instrument
panel center stack support to floor.
(18) Remove right front door sill plate using a trim
stick or equivalent, and gently prying up on sill
plate.
(19) Remove right cowl panel using a trim stick or
equivalent, and gently prying out on cowl panel.
(20) Using a trim stick or equivalent, gently pry
out on right instrument panel end cap.
(21) Unsnap right A-pillar lower extension trim
using a trim stick or equivalent.
(22) Remove three right side instrument panel
A-pillar retaining bolts and loosen the instrument
panel roll down bolt.
(23) Using a trim stick or equivalent, gently pry
off right side upper A-pillar trim.
(24) Open glove box, pinch in sides and roll down
towards floor. With a firm pull, snap glove box door
off hinges and remove.
(25) Using a trim stick or equivalent, gently pry
up on rear of instrument panel top cover and then
pull rearward and out.
(26) Using a trim stick or equivalent, gently pry
off the filler bezel just above the cup holder to expose
the lower screws to center bezel.
(27) Remove two screws and then using a trim
stick or equivalent, gently pry off instrument panel
center bezel.
(28) Remove center bezel wiring connectors to
HVAC control and switch assembly (hazard, rear
wiper/washer, heated seats) and remove bezel.
(29) Slide cup holder assembly from instrument
panel.
(30) Remove nineteen screws to right lower instru-
ment panel trim (glove box surround), unplug glove
box lamp wire connector, and remove panel.
(31) Remove four screws and wiring connectors to
radio and remove radio.
(32) Remove one far left instrument panel speaker
retaining screw.
(33) Remove four screws along top front edge of
instrument panel cover/pad.
(34) Remove seven lower instrument panel cover/
pad retaining screws starting from right of vehicle
and only removing these seven, not all of them.
(35) Remove six upper fence line instrument panel
retaining bolts.
(36) Roll back instrument panel just enough to
increase access to the passenger airbag retaining
bolts at the reinforcement. Lift the instrument panel
up slightly so as not to damage the air distribution to
HVAC unit seal.
(37) Disconnect the passenger airbag electrical
connector. Using a trim stick or equivalent, gently
pry electrical connector off of instrument panel rein-
forcement.
RSRESTRAINTS8O-31
PASSENGER AIRBAG (Continued)

(28) Install two right side nuts at instrument
panel center stack support to floor.
(29) Install two left side nuts at instrument panel
center stack support to floor.
(30) Connect the two wiring connectors to lower
instrument panel cubby bin at bottom of center stack
and install six screws.
(31) Align left side upper A-pillar trim over retain-
ing slots and firmly snap into place.
(32) Install four nuts at brake pedal support
bracket to instrument panel.
(33) Align left A-pillar lower extension trim over
retaining slots and firmly snap into place.
(34) Install knee blocker and retaining screws.
(35) Install Data Link Connector (DLC) into bot-
tom of knee blocker.
(36) Align parking brake lever and snap into place
on knee blocker reinforcement.
(37) Install lower steering column cover and four
retaining screws
(38) Align left cowl panel over retaining slots and
firmly snap into place.
(39) Align left front door sill plate over retaining
slots and firmly snap into place.
(40) Install center console bin between front seats.
WARNING: Do not connect the battery negative
cable (Refer to 8 - ELECTRICAL/RESTRAINTS -
DIAGNOSIS AND TESTING - AIRBAG SYSTEM). Per-
sonal injury or death may result if the system test
is not performed first.
(41) Close hood.
(42) Verify system and vehicle operation.
PASSENGER AIRBAG
DISABLED INDICATOR
DESCRIPTION
Vehicles equipped with the Occupant Classification
System (OCS) include a Passenger Airbag Disabled
(PAD) indicator (Fig. 40) which is located in the
instrument panel center stack, above the radio. The
PAD indicator is present only in vehicles equipped
with the OCS.The PAD indicator consists of a molded plastic
housing with an integral connector at the back. An
amber Light Emitting Diode (LED) behind the lens
causes the ªPASS AIR BAG OFFº text and icon to
appear silhouetted against an amber field through
the translucent lens when the indicator is illumi-
nated from behind by the LED. The PAD indicator is
available for separate service replacement.
OPERATION
In vehicles equipped with the Occupant Classifica-
tion System (OCS), the Passenger Airbag Disabled
(PAD) indicator gives an indication when the passen-
ger airbag and seat belt tensioner deployment cir-
cuits are disabled by the Occupant Restraint
Controller (ORC). The PAD indicator is controlled by
a transistor within the ORC through a hard wired
output based upon ORC programming and electronic
occupant classification messages received by the ORC
over the Programmable Communications Interface
(PCI) data bus from the Occupant Classification
Module (OCM). The PAD indicator Light Emitting
Diode (LED) is completely controlled by the ORC.
The LED receives a battery current input on the
fused ignition switch output (RUN/START) circuit.
Therefore, the LED will always be OFF when the
ignition switch is in any position except ON or
START. The LED only illuminates when it is pro-
vided a path to ground by the ORC transistor. The
ORC will turn on the PAD indicator for the following
reasons:
²Bulb Test- Each time the ignition switch is
turned to the ON position the PAD indicator is illu-
minated for about six seconds.
²Child Seat Detected Occupant Classifica-
tion Message- Each time the ORC receives a mes-
sage from the OCM indicating a child seat has been
detected in the passenger front seat, the passenger
airbag and seat belt tensioner deployment circuits
are deactivated and the PAD indicator will be illumi-
nated. The indicator remains illuminated until the
ORC receives an occupant classification message
indicating that:
²The passenger front seat is empty.
²The seat is occupied by a load equal to or
greater than a fifth percentile female.
²OR,Until the ignition switch is turned to the
OFF position, whichever of these three occurs first.
²Load Less Than Fifth Percentile Female
Occupant Classification Message- Each time the
ORC receives a message from the OCM indicating
that a load less than a fifth percentile female has
been detected in the passenger front seat, the pas-
senger airbag and seat belt tensioner deployment cir-
cuits are deactivated and the PAD indicator will be
illuminated. The indicator remains illuminated until:
Fig. 40 PASSENGER AIRBAG DISABLED (PAD)
INDICATOR
RSRESTRAINTS8O-33
PASSENGER AIRBAG (Continued)

²The ORC receives an occupant classification
message indicating that the passenger front seat is
empty.
²The seat is occupied by a load equal to or
greater than a fifth percentile female.
²OR, until the ignition switch is turned to the
OFF position, whichever of these three occurs first.
²Load Undetermined Occupant Classifica-
tion Message- Each time the ORC receives a mes-
sage from the OCM indicating that a load cannot be
determined in the passenger front seat, the passen-
ger airbag and seat belt tensioner deployment cir-
cuits are deactivated and the PAD indicator will be
illuminated. The indicator remains illuminated until:
²The ORC receives an occupant classification
message indicating that the passenger front seat is
empty.
²The seat is occupied by a load equal to or
greater than a fifth percentile female.
²OR, until the ignition switch is turned to the
OFF position, whichever of these three occurs first.
²Communication Error- If the ORC receives
invalid occupant classification messages or no mes-
sages from the OCM, the PAD indicator is illumi-
nated. The indicator remains illuminated until:
²The ORC receives an occupant classification
message indicating that the passenger front seat is
empty.
²The seat is occupied by a load equal to or
greater than a fifth percentile female.
²OR, until the ignition switch is turned to the
OFF position, whichever of these three occurs first.
The ORC continually monitors the occupant classi-
fication messages from the OCM to decide whether
the passenger airbag and seat belt tensioner deploy-
ment circuits should be activated or deactivated.
Note that there may be several seconds of delay
between changes in the detected occupant status and
PAD indications. This is a programmed feature of the
OCM used to prevent a flashing indicator condition
resulting from the normal shifting of occupant weight
on the passenger seat cushion. The ORC then pro-
vides the proper control output to turn the PAD indi-
cator ON or OFF.
The ORC will store a Diagnostic Trouble Code
(DTC) for any malfunction it detects. For proper
diagnosis of the OCM, the ORC, the PCI data bus, or
the electronic message inputs to the ORC that con-
trol the PAD indicator, use a scan tool and the appro-
priate diagnostic information.REMOVAL
(1) Open hood.
(2) Disconnect and isolate the battery negative
cable.
(3)
WARNING: Wait two minutes for the airbag system
reserve capacitor to discharge before beginning
any airbag system or component service. Failure to
do so may result in accidental airbag deployment,
personal injury or death.
(4) Remove instrument panel center bezel (Refer to
23 - BODY/INSTRUMENT PANEL/INSTRUMENT
PANEL CENTER BEZEL - REMOVAL).
(5) From the back of the center bezel, depress the
two latches toward the indicator housing and push
the indicator out through the face of the center bezel.
INSTALLATION
(1) From the face of the instrument panel center
bezel, align the Passenger Airbag Disabled (PAD)
indicator housing with the mounting hole.
(2) Firmly push the indicator into the center bezel
until the two latches are fully engaged on the back of
the cap and are snapped in.
(3) Install the instrument panel center bezel (Refer
to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT
PANEL CENTER BEZEL - INSTALLATION).
WARNING: Do not connect the battery negative
cable (Refer to 8 - ELECTRICAL/RESTRAINTS -
DIAGNOSIS AND TESTING - AIRBAG SYSTEM). Per-
sonal injury or death may result if the system test
is not performed first.
WARNING: Following successful completion of the
Airbag System test procedure, the Occupant Classi-
fication System Verification Test must be done
using a scan tool and the appropriate diagnostic
information.
(4) Close hood.
(5) Verify system and vehicle operation.
8O - 34 RESTRAINTSRS
PASSENGER AIRBAG DISABLED INDICATOR (Continued)

SEAT BELT BUCKLE - FRONT
INBOARD
REMOVAL
The seat belt tensioners are integral to the front
seat belt buckles. They are not serviceable and must
be replaced after a frontal impact event. The entire
front seat belt buckle assembly must be replaced as
an assembly.
(1) Open hood.
(2) Disconnect and isolate the battery negative
cable.
(3)
WARNING: Wait two minutes for the airbag system
reserve capacitor to discharge before beginning
any airbag system or component service. Failure to
do so may result in accidental airbag deployment,
personal injury or death.
(4) Remove screws attaching front inboard side
cover to seat cushion frame.
(5) Remove side cover from front seat.
(6) Disconnect the tensioner wire connector from
seat belt buckle.
(7) Remove bolt attaching seat belt buckle to front
seat track.
(8) Remove buckle from seat.
INSTALLATION
The seat belt tensioners are integral to the front
seat belt buckles. They are not serviceable and must
be replaced after a frontal impact event. The entire
front seat belt buckle assembly must be replaced as
an assembly.
(1) Place buckle into position.
(2) Install bolt attaching seat belt buckle to front
seat track. Torque bolt to 39 N´m (29 ft. lbs.).
(3) Connect the seat belt tensioner electrical con-
nector.
(4) Install side cover into position.
(5) Install screws attaching front inboard side
cover to seat cushion frame.
WARNING: Do not connect the battery negative
cable (Refer to 8 - ELECTRICAL/RESTRAINTS -
DIAGNOSIS AND TESTING - AIRBAG SYSTEM). Per-
sonal injury or death may result if the system test
is not performed first.
WARNING: If equipped with the Occupant Classifi-
cation System (OCS) and replacing the passenger
front seat belt buckle: Following successful com-
pletion of the Airbag System test procedure, the
Occupant Classification System Verification Testmust be done using a scan tool and the appropriate
diagnostic information.
(6) Close hood.
(7) Verify system and vehicle operation.
SEAT BELT BUCKLE - FIRST
ROW INBOARD - QUAD
BUCKET
REMOVAL
QUAD BUCKET
(1) Remove seat from vehicle.
(2) Remove screws attaching inboard side cover to
seat cushion.
(3) Remove side cover from seat.
(4) Remove bolts attaching recliner bracket to seat
cushion.
(5) Remove recliner bracket from seat.
(6) Remove bolt attaching seat belt buckle to seat
track (Fig. 41).
(7) Remove buckle from vehicle.
QUAD BUCKET - FOLD IN FLOOR
(1) Fold in floor the seat not having the buckle
replaced.
(2) Remove the hinge cover retaining screw and
hinge cover.
Fig. 41 1ST ROW INBOARD BUCKLE - QUAD
BUCKET
1 - SEAT CUSHION
2 - SEAT BELT BUCKLE
3 - SEAT TRACK
RSRESTRAINTS8O-35

INSTALLATION
(1) Push belt through seat cushion.
(2) While looking at the bottom of the seat, locate
retaining bolt hole on the left side of the seat riser.
Install retaining bolt into seat riser (Fig. 45). Torque
anchor bolt to 39 N´m (29 ft. lbs.).
(3) Place seat into track and on front anchors.
(4) Pull #3 strap and install seat onto latching
area.
(5) Pull seat assembly down firmly and snap into
track.
(6) Pull handle #1 and fold seat back rearward.
(7) Close rear liftgate.
SEAT BELT HEIGHT
ADJUSTER-BORC-PILLAR
REMOVAL
(1) Remove turning loop retaining bolt.
(2) Remove B or C-pillar trim cover.
(3) Remove two screws attaching shoulder belt
height adjuster to pillar.
(4) Remove height adjuster from vehicle.
INSTALLATION
(1) Place height adjuster into position.
(2) Install screws attaching shoulder belt height
adjuster to pillar.
(3) Install B or C-pillar trim cover.
(4) Install turning loop to height adjuster. Torque
anchor bolt to 39 N´m (29 ft. lbs.).
SEAT BELT HEIGHT
ADJUSTER KNOB
REMOVAL
(1) Disengage clips attaching clam shell cover to
seat belt turning loop and open cover.
(2) Using a trim tool (special tool #C-4755), gently
pry knob from seat belt height adjuster.
INSTALLATION
(1) Place seat belt height adjuster knob in position
on height adjuster.
(2) Firmly push knob on until retainers engage.
(3) Reinstall turning loop clam shell cover.
(4) Verify seat belt operation. Make sure it moves
through loop without binding.
SEAT BELT & RETRACTOR -
OUTBOARD - FRONT
REMOVAL
(1) Open door.
(2) Move seat all the way forward.
(3) Open hood.
(4) Disconnect and isolate the battery negative
cable.
(5)
WARNING: Wait two minutes for the airbag system
reserve capacitor to discharge before beginning
any airbag system or component service. Failure to
do so may result in accidental airbag deployment,
personal injury or death.
(6) Remove shoulder harness height adjuster knob
by pulling it straight away from adjuster (Fig. 48).
(7) Remove cover from seat belt turning loop (Fig.
48).
(8) Remove bolt attaching turning loop to shoulder
belt height adjuster (Fig. 48).
(9) Remove upper B-pillar trim cover (Fig. 48).
NOTE: If equipped with the Occupant Classification
System (OCS), there is a Belt Tension Sensor
located on the lower seat belt anchor on the pas-
senger front seat belt.
Fig. 48 SEAT BELT - OUTBOARD FRONT
1 - B-PILLAR TRIM LOWER
2 - BELT
3 - B-PILLAR TRIM UPPER
4 - HEIGHT ADJUSTER
5 - KNOB
6 - B-PILLAR TRIM LOWER
7 - FLOOR ANCHOR
8 - FLOOR ANCHOR
9 - 30É OUTBOARD
10 - RETRACTOR
8O - 38 RESTRAINTSRS
SEAT BELT BUCKLE - SECOND ROW INBOARD - 50/50 BENCH (Continued)

accessible from the rear after the D-pillar trim is
removed.
(10) Remove quarter trim bolster.
(11) Remove quarter trim panel screws.
(12) Remove quarter trim panel.
(13) Remove first row seat belt and retractor
retaining bolt.
(14) Remove first row seat belt and retractor from
vehicle.
INSTALLATION
(1) Install first row seat belt and retractor. Torque
bolt to 39 N´m (29 ft. lbs.).
(2) Install quarter trim panel.
(3) Install quarter trim panel screws.
(4) Install quarter trim bolster.
(5) Connect speaker connector. The left side has
the speaker mounted in the D-pillar trim cover and
the right side will have the speaker mounted in the
rear of the quarter trim panel, but the connector is
accessible from the rear after the D-pillar trim is
removed.
(6) Install D-pillar trim cover.
(7) Install second seat belt lower anchor bolt.
Torque bolt to 39 N´m (29 ft. lbs.).
(8) Install second seat belt upper turning loop
anchor bolt. Torque bolt to 39 N´m (29 ft. lbs.).
(9) Install upper liftgate trim.
(10) Install liftgate sill plate.
(11) Install first row seat belt upper turning loop
anchor bolt. Torque bolt to 39 N´m (29 ft. lbs.).
(12) Install first row seat belt lower anchor bolt.
Torque bolt to 39 N´m (29 ft. lbs.).
(13) Install first and second row seats.
SEAT BELT BUCKLE - SECOND
ROW - THREE PASSENGER
BENCH
REMOVAL
(1) Remove bolt attaching seat belt buckle to seat
rear frame rail (Fig. 50).
(2) Remove seat belt buckle from seat.
INSTALLATION
(1) Place seat belt buckle in position on seat.
(2) Install bolt to attach seat belt buckle to seat
rear frame rail. Tighten all seat belt bolts to 39 N´m
(29 ft. lbs.) torque.
SEAT BELT & RETRACTOR -
SECOND ROW - RIGHT
OUTBOARD
REMOVAL
(1) Remove first and second row seats.
(2) Remove first row seat belt lower anchor bolt.
(3) Remove first row seat belt upper anchor bolt.
(4) Remove liftgate sill plate.
(5) Remove upper liftgate trim.
(6) Remove second seat belt lower anchor bolt.
(7) Remove second seat belt upper anchor bolt.
(8) Remove D-pillar trim cover.
(9) Disconnect speaker connector. The left side has
the speaker mounted in the D-pillar trim cover and
the right side will have the speaker mounted in the
rear of the quarter trim panel, but the connector is
accessible from the rear after the D-pillar trim is
removed.
(10) Remove quarter trim bolster.
(11) Remove quarter trim panel screws.
(12) Remove quarter trim panel.
(13) Remove retractor retaining bolt.
(14) Remove second row seat belt and retractor.
INSTALLATION
(1) Install second row seat belt and retractor.
Torque bolt to 39 N´m (29 ft. lbs.).
(2) Install quarter trim panel.
(3) Install quarter trim panel screws.
(4) Install quarter trim bolster.
(5) Connect speaker connector. The left side has
the speaker mounted in the D-pillar trim cover and
Fig. 50 SEAT BELT BUCKLE - SECOND ROW -
THREE PASSENGER BENCH
1 - ANCHOR BOLT
2 - SEAT BELTS
3 - ANCHOR
4 - RISER
8O - 40 RESTRAINTSRS
SEAT BELT & RETRACTOR - FIRST ROW - OUTBOARD (Continued)

SEAT BELT TENSIONER
DESCRIPTION
The seat belt system incorporates Seat Belt Ten-
sioners. The tensioner is designed to hold the occu-
pant in their respective seat by retracting the seat
belt up to four inches. They are integral to the front
seat belt buckles and cannot be serviced. If found
defective they must be replaced. After an airbag
deployment, the tensioner must be replaced.
Seat Belt Tensioners supplement the dual front air-
bag system. The seat belt tensioners are integral to
the front seat belt buckles, which are secured to the
seat cushion frame on the inboard side. The seat belt
tensioners are controlled by the Occupant Restraint
Controller (ORC) and are connected to the vehicle
electrical system through the body wire harness.
The seat belt tensioners cannot be repaired and, if
faulty or damaged, the entire front seat belt buckle
must be replaced. The seat belt tensioners are not
intended for reuse and must be replaced following
any front airbag deployment.
OPERATION
WARNING: When the front airbag is deployed, the
tensioner will have deployed also and should be
replaced. Failure to do so could result in occupant
personal injury or death.
The seat belt tensioners are deployed by a signal
generated by the Occupant Restraint Controller
(ORC) through the driver or passenger seat belt ten-
sioner line 1 and line 2 (or squib) circuits. When the
ORC sends the proper electrical signal to the tension-
ers, the electrical energy generates enough heat to
initiate a small pyrotechnic gas generator.
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
occupants of the front seat might experience in these
situations as a result of a harmful contact with the
steering wheel, steering column, instrument panel
and/or windshield.
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
scan tool and the appropriate diagnostic information.
SEAT WEIGHT BLADDER &
PRESSURE SENSOR
DESCRIPTION
Vehicles equipped with the Occupant Classification
System (OCS) have a seat weight bladder and pres-
sure sensor unit (Fig. 54) that is integral to the pas-
senger front seat cushion. The bladder is sandwiched
between the seat cushion pan and seat cushion foam.
The bladder consists of two rectangular sheets of
an elastomeric material and a molded plastic elbow
fitting. The two sheets of material are sealed
together around their perimeter and heat staked to
each other at numerous regular points within their
field. The elbow fitting is sealed to a small round
hole in the lower surface of the bladder and is
pointed downward where it passes through a clear-
ance hole in the insulator pad and extends to just
below the seat cushion. The bladder is then filled
with a silicone fluid to become a pliable, quilted
membrane.
Under the seat cushion a short tube is securely
clamped at one end to the bladder nipple, and at the
other end to a nipple on the electronic pressure sen-
sor. The sensor housing features an integral mount
that snaps over a tab integral to the stamped steel
Occupant Classification Module (OCM) mounting
bracket welded to the underside of the passenger
front seat cushion frame.
Fig. 54 SEAT WEIGHT BLADDER AND PRESSURE
SENSOR - TYPICAL
1 - FASTENER (2)
2 - BLADDER
3-PAD
4 - TUBE
5 - PRESSURE SENSOR
RSRESTRAINTS8O-43