Chrysler RG Voyager. Manual - part 755

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.

(5) Verify vehicle and system operation.
(6) Close hood.

SIDE IMPACT SENSORS

B-PILLAR MOUNTED

(1) Position sensor bracket in vehicle (Fig. 25).
(2) Install the four retaining screws to the impact

sensor bracket (Fig. 25). Torque screws to 7 N·m (62
in. lbs.).

(3) Connect the electrical connector (Fig. 25).
(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).

(5) Verify vehicle and system operation.
(6) Close hood.

SLIDING DOOR OPENING MOUNTED

(1) Connect electrical connector (Fig. 27).
(2) Position sensor in vehicle (Fig. 27).
(3) Install the two retaining screws to the impact

sensor (Fig. 27). Torque screws to 7 N·m (62 in. lbs.).

(4) Verify vehicle and system operation.
(5) Close hood.

QUARTER PANEL MOUNTED

(1) Position sensor in vehicle (Fig. 28).
(2) Connect electrical connector (Fig. 28).
(3) Install the two retaining screws to the impact

sensor (Fig. 28). Torque screws to 7 N·m (62 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 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.

(5) Verify vehicle and system operation.
(6) Close hood.

KNEE BLOCKER AIRBAG

DESCRIPTION

The Knee Blocker Airbag (Fig. 29) is located on the

driver side of the vehicle beneath the instrument
panel under steering column cover (Fig. 30).

The knee blocker airbag includes one reaction plate

and one load plate, within which the cushion and
inflator are mounted and sealed. Following a knee
blocker airbag deployment, the knee blocker airbag
and instrument panel assembly must be replaced.
Refer to the proper diagnostic information for diagno-
sis and testing.

OPERATION

The knee blocker airbag is equipped with a single

inflator. When the Occupant Restraint Controller
(ORC) sends the proper electrical signals to the initi-
ator, the electrical energy generates enough heat to
initiate a small pyrotechnic charge which, in turn
ignites chemical pellets within the inflator. Once
ignited, these chemical pellets burn rapidly and pro-
duce a large quantity of inert gas. The inflator is
sealed to the back of the airbag housing and a dif-
fuser in the inflator directs all of the inert gas into
the airbag cushion, causing the cushion to inflate. As
the cushion inflates, the knee blocker airbag trim
deploy. Following an airbag deployment, the airbag
cushion quickly deflates by venting the inert gas
towards the instrument panel through vent holes
within the fabric used to construct the back panel of
the airbag cushion.

Some of the chemicals used to create the inert gas

may be considered hazardous while in their solid
state before they are burned, but they are securely

Fig. 29 KNEE BLOCKER AIRBAG

RESTRAINTS

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IMPACT SENSOR (Continued)

sealed within the airbag inflator. Typically, the poten-
tially hazardous chemicals are burned during an air-
bag deployment event.

WARNING: The inert gas that is produced when the
chemicals are burned is harmless. However, a small
amount of residue from the burned chemicals may
cause some temporary discomfort if it contacts the
skin, eyes, or breathing passages. If skin or eye irri-
tation is noted, rinse the affected area with plenty
of cool, clean water. If breathing passages are irri-
tated, move to another area where there is plenty of
clean, fresh air to breath. If the irritation is not alle-
viated by these actions, contact a physician.

REMOVAL

(1) Open hood, disconnect and isolate the battery

negative cable.

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.

(2) Remove the steering column opening cover two

retaining screws (Fig. 31) and unsnap cover from
instrument panel (Refer to 23 - BODY/INSTRU-

MENT

PANEL/STEERING

COLUMN

OPENING

COVER - REMOVAL).

(3) Disconnect the knee blocker airbag electrical

connector (Fig. 32).

(4) Remove five knee blocker airbag retaining bolts

from airbag (Fig. 33).

(5) Remove knee blocker airbag from vehicle.

INSTALLATION

(1) Place the knee blocker airbag into position in

the instrument panel opening (Fig. 33).

(2) Connect the one electrical connector (Fig. 32).
(3) Install the five knee blocker airbag retaining

bolts (Fig. 33).

(4) Position the steering column opening cover

over retaining slots and firmly snap into place (Fig.
31). Install the two retaining screws (Fig. 31) (Refer
to 23 - BODY/INSTRUMENT PANEL/STEERING
COLUMN OPENING COVER - INSTALLATION).

(5) Verify vehicle and system operation.
(6) Close hood.

Fig. 30 KNEE BLOCKER AIRBAG LOCATION

1 - KNEE BLOCKER AIRBAG

3 - UNDER STEERING COLUMN COVER RETAINING SCREWS

2 - UNDER STEERING C0LUMN COVER

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RESTRAINTS

KNEE BLOCKER AIRBAG (Continued)

Fig. 31 STEERING COLUMN OPENING COVER

1 - KNEE BLOCKER AIRBAG

3 - UNDER STEERING COLUMN COVER RETAINING SCREWS

2 - UNDER STEERING C0LUMN COVER

Fig. 32 KNEE BLOCKER AIRBAG ELECTRICAL

CONNECTOR

1 - KNEE BLOCKER AIRBAG
2 - INSTRUMENT PANEL
3 - KNEE BLOCKER AIRBAG ELECTRICAL CONNECTOR

Fig. 33 KNEE BLOCKER AIRBAG - REMOVE/

INSTALL

1 - KNEE BLOCKER AIRBAG RETAINING SCREWS
2 - KNEE BLOCKER AIRBAG
3 - KNEE BLOCKER AIRBAG ELECTRICAL CONNECTOR
4 - INSTRUMENT PANEL

RESTRAINTS

8O - 23

KNEE BLOCKER AIRBAG (Continued)

OCCUPANT CLASSIFICATION
MODULE

DESCRIPTION

The Occupant Classification Module (OCM) (Fig.

34) is secured with two screws to a stamped steel
mounting bracket welded onto the underside of the
passenger front seat cushion frame near the inboard
front corner (Fig. 35). Concealed within a hollow in
the center of the molded plastic OCM housing is a
microprocessor and the other electronic circuitry of
the module. The module housing is sealed to enclose
and protect the internal electronic circuitry. The
OCM software is flash programmable.

A non-calibrated OCM is the only component of the

Occupant Classification System (OCS) that is avail-
able for separate service replacement. The OCS com-
ponents of the passenger side front seat cushion
including the cushion frame, insulator pad, seat
weight bladder and pressure sensor, seat cushion
foam, wiring harness and the OCM are a factory-cal-
ibrated and assembled unit. Once this unit is con-
nected

vehicle

electrically,

the

calibration

settings are uploaded from the calibrated OCM and
stored in the memory of the Occupant Restraint Con-
troller (ORC). If only the OCM is subsequently
replaced, the new, non-calibrated OCM learns the
proper calibration settings from the ORC after it is
connected to the vehicle electrically.

The OCM cannot be adjusted or repaired and, if

damaged or faulty, it must be replaced. The compo-
nents of the passenger front seat cushion are ser-
viced only as a factory-calibrated, assembled and
tamper-evident unit. Only the OCM and the seat
cushion trim are available for separate service
replacement. Once a service replacement package has
been installed in a vehicle, the OCM can thereafter
be serviced only by replacing the entire passenger
front seat cushion with another complete service
replacement package.

OPERATION

The microprocessor in the Occupant Classification

Module (OCM) contains the Occupant Classification
System (OCS) logic circuits. The OCM uses On-Board
Diagnostics (OBD) and can communicate with other
electronic modules in the vehicle as well as with a
scan tool using the Programmable Communications
Interface (PCI) data bus network. This method of
communication is also used for OCS diagnosis and
testing through the 16-way Data Link Connector
(DLC), located on the driver side lower edge of the
instrument panel.

The OCM provides a nominal five volts to both the

pressure sensor of the seat weight bladder beneath
the passenger front seat cushion and to the belt ten-
sion sensor on the passenger front seat belt lower

Fig. 34 OCCUPANT CLASSIFICATION MODULE

(OCM) - TYPICAL

1 - OCCUPANT CLASSIFICATION MODULE
2 - CONNECTOR LOCK TOWER
3 - CONNECTOR RECEPTACLE
4 - MOUNTING TAB (2)

Fig. 35 OCM LOCATION

1 - OCCUPANT CLASSIFICATION MODULE (OCM)
2 - LOCK TOWER
3 - LOCK PIN
4 - CONNECTOR
5 - SCREW (2)
6 - BRACKET

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RESTRAINTS

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