Chrysler Pacifica. Manual — part 533
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 steering column opening cover two
retaining screws (Fig. 28) and unsnap cover from
instrument panel.
(4) Remove four knee blocker airbag retaining
bolts from airbag (Fig. 29).
(5) Pull down knee blocker airbag and disconnect
the one electrical connector (Fig. 29).
(6) Remove knee blocker airbag from vehicle.
INSTALLATION
(1) Place the knee blocker airbag into position in
the instrument panel opening.
(2) Connect the one electrical connector (Fig. 29).
(3) Install the four knee blocker airbag retaining
bolts into the airbag (Fig. 29).
(4) Position the steering column opening cover
over retaining slots and firmly snap into place.
Install the two retaining screws (Fig. 28).
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.
Fig. 28 INSTRUMENT PANEL TRIM - REMOVE/INSTALL
1 - LEFT INSTRUMENT PANEL TRIM
3 - KNEE BLOCKER AIRBAG
2 - INSTRUMENT PANEL ASSEMBLY
4 - INSTRUMENT PANEL STEERING COLUMN OUTER COVER
CS
RESTRAINTS
8O - 25
KNEE BLOCKER AIRBAG (Continued)
IMPACT SENSOR
DESCRIPTION
FRONT IMPACT SENSORS
There are two front impact sensors, one each for
the left and right sides of the vehicle. These sensors
are mounted remotely from the impact sensor that is
internal to the Occupant Restraint Controller (ORC).
The right and left front and side impact sensors are
identical in construction and calibration and each
front impact sensor is secured with two screws. The
front impact sensors are secured with two screws to
the outboard sides of the right and left vertical mem-
bers of the radiator support within the engine com-
partment (Fig. 30).
The impact sensor housing has an integral connec-
tor receptacle and two integral mounting ears, each
with a metal sleeve to provide crush protection. A
cavity in the center of the molded black plastic
impact sensor housing contains the electronic cir-
cuitry of the sensor which includes an electronic com-
munication chip and an electronic impact sensor.
Potting material fills the cavity to seal and protect
the internal electronic circuitry and components. The
front impact sensors are each connected to the vehi-
cle electrical system through a dedicated take out
and connector of the right or left headlamp and dash
wire harnesses.
The front impact sensors cannot be repaired or
adjusted and, if damaged or faulty, they must be
replaced. If a front impact sensor is faulty, only the
sensor needs to be replaced. If the sensor is damaged
or faulty, or if proper tightening torque of the screws
that secure the sensor to the bracket cannot be
achieved, the sensor and bracket unit must be
replaced. Refer to the proper Body Diagnostic Proce-
dures manual for diagnosis and testing.
SIDE IMPACT SENSORS
Three side impact sensors are used on each side of
the vehicle. These sensors are mounted remotely
from the bi-directional safing sensor that is internal
to the Occupant Restraint Controller (ORC). The side
and front impact sensors are identical in construction
and calibration and each impact sensor is secured
with two screws. Each side impact sensor is secured
with two screws. The first row side impact sensor is
located in the B-pillar, just above the front seat belt
retractor (Fig. 31). The second row side impact sen-
sor is located in the C-pillar, just in front of the sec-
ond row seat belt retractor (Fig. 32). The third row
side impact sensor is located behind the quarter trim
panel, above the rear tire wheel well, between the C
and D-pillars (Fig. 33).
The impact sensor housing has an integral connec-
tor receptacle. A cavity in the center of the molded
black plastic impact sensor housing contains the elec-
tronic circuitry of the sensor which includes an elec-
tronic communication chip and an electronic impact
sensor. Potting material fills the cavity to seal and
protect the internal electronic circuitry and compo-
nents. The side impact sensors are each connected to
the vehicle electrical system through a dedicated
take out and connector of the airbag overlay wire
harness.
The side impact sensors cannot be repaired or
adjusted and, if damaged or faulty, they must be
replaced. Refer to the proper Body Diagnostic Proce-
dures manual for diagnosis and testing.
REMOVAL
FRONT IMPACT SENSOR
(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 headlamp unit of the side in which
you are replacing the sensor (Refer to 8 - ELECTRI-
CAL/LAMPS/LIGHTING - EXTERIOR/HEADLAMP
UNIT - REMOVAL).
Fig. 29 KNEE BLOCKER AIRBAG - REMOVE/
INSTALL
1 - KNEE BLOCKER AIRBAG ELECTRICAL CONNECTOR
2 - INSTRUMENT PANEL ASSEMBLY
3 - KNEE BLOCKER AIRBAG
8O - 26
RESTRAINTS
CS
KNEE BLOCKER AIRBAG (Continued)
(4) Through the headlamp opening, remove the
two mounting screws retaining the front impact sen-
sor (Fig. 30).
(5) Disconnect electrical connector.
(6) Remove sensor from vehicle.
SIDE IMPACT SENSORS
B-PILLAR MOUNTED
(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 B-pillar lower trim for the side of
the vehicle that you are replacing the side impact
sensor (Refer to 23 - BODY/INTERIOR/B-PILLAR
LOWER TRIM - REMOVAL).
(4) Remove the two retaining screws to the impact
sensor (Fig. 31).
(5) Disconnect the electrical connector from the
impact sensor and remove from vehicle (Fig. 31).
C-PILLAR MOUNTED
(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 quarter trim panel for the side of
the vehicle that you are replacing the side impact
sensor (Refer to 23 - BODY/INTERIOR/QUARTER
TRIM PANEL - REMOVAL).
(4) Remove the two retaining screws to the impact
sensor (Fig. 32).
(5) Disconnect the electrical connector from the
impact sensor and remove from vehicle (Fig. 32).
Fig. 30 FRONT IMPACT SENSOR - REMOVE/
INSTALL
1 - FRONT IMPACT SENSOR RETAINING SCREWS
2 - FRONT IMPACT SENSOR
3 - CROSSMEMBER LOWER RADIATOR SUPPORT
4 - FRONT IMPACT SENSOR ELECTRICAL CONNECTOR
5 - FRAME RAIL RIGHT SIDE FRONT
Fig. 31 FIRST ROW SIDE IMPACT SENSOR -
REMOVE/INSTALL
1 - FIRST ROW SIDE IMPACT SENSOR
2 - SIDE IMPACT SENSOR MOUNTING SCREWS
3 - SIDE IMPACT SENSOR ELECTRICAL CONNECTOR
4 - B-PILLAR
Fig. 32 SECOND ROW SIDE IMPACT SENSOR -
REMOVE/INSTALL
1 - SIDE IMPACT SENSOR ELECTRICAL CONNECTOR
2 - SIDE IMPACT SENSOR MOUNTING SCREWS
3 - SECOND ROW SIDE IMPACT SENSOR
4 - C-PILLAR
CS
RESTRAINTS
8O - 27
IMPACT SENSOR (Continued)
QUARTER PANEL MOUNTED
(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 quarter trim panel for the side of
the vehicle that you are replacing the side impact
sensor (Refer to 23 - BODY/INTERIOR/QUARTER
TRIM PANEL - REMOVAL).
(4) Remove the two retaining screws to the impact
sensor (Fig. 33).
(5) Disconnect the electrical connector from the
impact sensor and remove from vehicle (Fig. 33).
INSTALLATION
FRONT IMPACT SENSOR
(1) Position sensor in vehicle.
(2) Connect electrical connector.
(3) Through the headlamp opening, install the two
mounting screws retaining the front impact sensor
(Fig. 30). Torque screws to 8.5 N·m (75 in. lbs.).
(4) Install the headlamp unit of the side in which
you are replacing the sensor (Refer to 8 - ELECTRI-
CAL/LAMPS/LIGHTING - EXTERIOR/HEADLAMP
UNIT - INSTALLATION).
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.
SIDE IMPACT SENSORS
B-PILLAR MOUNTED
(1) Position sensor in vehicle.
(2) Connect the electrical connector (Fig. 31).
(3) Install the two retaining screws to the impact
sensor (Fig. 31). Torque screws to 7 N·m (62 in. lbs.).
(4) Install the B-pillar lower trim for the side of
the vehicle that you are replacing the side impact
sensor (Refer to 23 - BODY/INTERIOR/B-PILLAR
LOWER TRIM - INSTALLATION).
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.
C-PILLAR MOUNTED
(1) Position sensor in vehicle.
(2) Connect the electrical connector (Fig. 32).
(3) Install the two retaining screws to the impact
sensor (Fig. 32). Torque screws to 7.3 N·m (65 in.
lbs.).
(4) Install the quarter trim panel for the side of
the vehicle that you are replacing the side impact
sensor (Refer to 23 - BODY/INTERIOR/QUARTER
TRIM PANEL - INSTALLATION).
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.
QUARTER PANEL MOUNTED
(1) Position sensor in vehicle.
(2) Connect electrical connector (Fig. 33).
Fig. 33 THIRD ROW SIDE IMPACT SENSOR -
REMOVE/INSTALL
1 - SIDE IMPACT SENSOR (QUARTER PANEL MOUNTED)
2 - SIDE IMPACT SENSOR (QUARTER PANEL MOUNTED)
RETAINING SCREWS
3 - SIDE IMPACT SENSOR (QUARTER PANEL MOUNTED)
ELECTRICAL CONNECTOR
8O - 28
RESTRAINTS
CS
IMPACT SENSOR (Continued)
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