Chrysler Pacifica. Manual — part 535
the ORC is to provide confirmation to the ORC of
side impact forces. This second safing 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 and; if the vehicle is so equipped, knee blocker
airbag, and the front seat belt tensioners and either
curtain airbag.
REMOVAL
(1) Open hood, disconnect and isolate the battery
negative cable.
(2) Wait two minutes for the system reserve capac-
itor to discharge before beginning any system or com-
ponent service.
(3) Remove the left and right forward console
closeout panels (Fig. 38).
(4) From the right side of the vehicle, disconnect
the two ORC electrical connectors (Fig. 39).
(5) Remove the three retaining screws to the ORC.
One on the left side of the floor tunnel, and one in
front of (toward bulkhead) and behind (toward vehi-
cle rear) the ORC unit (Fig. 40).
(6) Remove ORC from vehicle.
Fig. 38 FRONT FLOOR CONSOLE
1 - FORWARD CONSOLE CLOSEOUT PANEL
5 - FRONT FLOOR CONSOLE ATTACHING SCREWS TO BASE
2 - CLOSEOUT PANEL PUSH PIN RETAINER
6 - FRONT FLOOR CONSOLE WIRING CONNECTOR
3 - INSTRUMENT PANEL WIRING
7 - FRONT FLOOR CONSOLE
4 - FLOOR CONSOLE BASE
Fig. 39 ORC CONNECTORS
1 - OCCUPANT RESTRAINT CONTROLLER (ORC)
2 - BODY HARNESS ORC CONNECTOR
3 - INSTRUMENT PANEL HARNESS ORC CONNECTOR
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RESTRAINTS
8O - 33
OCCUPANT RESTRAINT CONTROLLER (Continued)
INSTALLATION
(1) Position ORC in vehicle.
(2) Install the three retaining screws to the ORC.
One on the left side of the floor tunnel, and one in
front of (toward bulkhead) and behind (toward vehi-
cle rear) the ORC unit (Fig. 40). Torque screws to
14.5 N·m (128 in. lbs.).
(3) From the right side of the vehicle, connect the
two ORC electrical connectors (Fig. 39).
(4) Install the left and right forward console close-
out panels (Fig. 38).
WARNING: DO NOT CONNECT THE BATTERY NEG-
ATIVE
CABLE.
(Refer
to
8
-
ELECTRICAL/RE-
STRAINTS - DIAGNOSIS AND TESTING - AIRBAG
SYSTEM)
FIRST.
FAILURE
TO
DO
SO
COULD
RESULT IN OCCUPANT PERSONAL INJURY OR
DEATH.
(5) Verify vehicle and system operation.
(6) Close hood.
PASSENGER AIRBAG
DISABLED INDICATOR
DESCRIPTION
Vehicles equipped with the Occupant Classification
System (OCS) include a Passenger Airbag Disabled
(PAD) indicator (Fig. 41) which is located in the
instrument panel switch pod, just to the right of the
cluster, clock, navigation and EVIC buttons. The PAD
indicator is present only in vehicles equipped with
the OCS. The PAD indicator is an amber Light Emit-
ting Diode (LED) that is only serviced with the
instrument panel switch pod.
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
Fig. 40 ORC - REMOVE/INSTALL
1 - OCCUPANT RESTRAINT CONTROLLER (ORC)
2 - ORC RETAINING SCREWS (3)
3 - INSTRUMENT PANEL HARNESS ORC CONNECTOR
4 - BODY HARNESS ORC CONNECTOR
5 - FLOOR TUNNEL
Fig. 41 PASSENGER AIRBAG DISABLED (PAD)
INDICATOR
1 - HAZARD SWITCH
2 - PAD INDICATOR
8O - 34
RESTRAINTS
CS
OCCUPANT RESTRAINT CONTROLLER (Continued)
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:
• Bulb Test - Each time the ignition switch is
turned to the ON position the PAD indicator is illu-
minated for about six seconds.
• Child 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:
• The passenger front seat is empty.
• The seat is occupied by a load equal to or
greater than a fifth percentile female.
• OR, Until the ignition switch is turned to the
OFF position, whichever of these three occurs first.
• Load 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:
• The ORC receives an occupant classification
message indicating that the passenger front seat is
empty.
• The seat is occupied by a load equal to or
greater than a fifth percentile female.
• OR, until the ignition switch is turned to the
OFF position, whichever of these three occurs first.
• Load 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:
• The ORC receives an occupant classification
message indicating that the passenger front seat is
empty.
• The seat is occupied by a load equal to or
greater than a fifth percentile female.
• OR, until the ignition switch is turned to the
OFF position, whichever of these three occurs first.
• Communication 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:
• The ORC receives an occupant classification
message indicating that the passenger front seat is
empty.
• The seat is occupied by a load equal to or
greater than a fifth percentile female.
• OR, 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.
PASSENGER AIRBAG
DESCRIPTION
The rearward facing surface of the instrument
panel top pad above the glove box is the most visible
part of the passenger airbag (Fig. 3). The passenger
airbag door is concealed behind the instrument panel
top pad and above the glove box opening on the
instrument panel in front of the front seat passenger
(Fig. 42). The passenger airbag door is secured on the
back of the instrument panel top pad armature.
Located behind the passenger airbag door is the
passenger airbag (Fig. 43). The passenger airbag is
secured by a screw on each side to the instrument
panel structural duct and two screws to the crosscar
beam. A short four-wire pigtail harness with a keyed,
yellow connector insulator connects the two inflator
initiators to the vehicle electrical system through a
dedicated take out and connector of the instrument
panel wire harness.
The passenger airbag is a multistage airbag. It
consists of a magnesium housing, the rectangular
fabric airbag cushion, and the airbag inflator. The
airbag housing contains the airbag inflator, while the
inner cover contains the folded airbag cushion. The
inner cover completely encloses the airbag cushion
and is permanently retained to the housing. The air-
bag cushion is constructed of a nylon fabric. The air-
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RESTRAINTS
8O - 35
PASSENGER AIRBAG DISABLED INDICATOR (Continued)
bag inflator is a dual-initiator, hybrid-type unit that
is secured to and sealed within the airbag housing.
The passenger airbag cannot be repaired, and must
be replaced if deployed, faulty, or in any way dam-
aged. The passenger airbag door is serviced only as a
unit with the instrument panel. If the passenger air-
bag is deployed, the instrument panel must also be
replaced. Refer to the proper Body Diagnostic Proce-
dures manual for diagnosis and testing.
OPERATION
The multistage passenger airbag is deployed by
electrical
signals
generated
by
the
Occupant
Restraint Controller (ORC) through the passenger
airbag squib 1 and squib 2 circuits to the two initia-
tors in the airbag inflator. By using two initiators,
the airbag will have multiple deployment levels. The
deployment level is controlled by the ORC to suit the
monitored impact conditions by providing one of four
delay intervals between the electrical signals pro-
vided to the two initiators. The longer the delay
between these signals, the deployment level will be
less.
The hybrid-type inflator assembly includes a small
canister of highly compressed gas. When the ORC
sends the proper electrical signal to the airbag initi-
ator, the initiator generates enough heat to ignite
Fig. 42 PASSENGER AIRBAG - LOCATION
1 - PASSENGER AIRBAG ATTACHMENT POINTS
3 - INSTRUMENT PANEL/GLOVE BOX OPENING
2 - PASSENGER AIRBAG
4 - PASSENGER AIRBAG CONNECTOR
Fig. 43 PASSENGER AIRBAG
8O - 36
RESTRAINTS
CS
PASSENGER AIRBAG (Continued)
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