Dodge Durango (HB). Manual - part 557

CAUTION: On vehicles equipped with the Occupant Classification System (OCS), never replace both the
Occupant Restraint Controller (ORC) and the Occupant Classification Module (OCM) at the same time. If
both require replacement, replace one. Then perform the supplemental restraint verification test before
replacing the other. Both the ORC and the OCM store 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.

1. Carefully position the Occupant Restraint Controller

(ORC) (2) to the ORC bracket (4) on the floor
panel transmission tunnel. When the ORC is cor-
rectly positioned, the arrow on the ORC label will
be pointed forward in the vehicle and the locating
pin on the bottom of the right ORC mounting flange
will be engaged into the locating hole in the ORC
bracket.

2. Install and tighten the three screws (3) that secure

the ORC to the ORC bracket that is welded onto
the floor panel transmission tunnel. Tighten the
screws to 11 N·m (8 ft. lbs.).

CAUTION: The lever arms of the wire harness con-
nectors for the ORC MUST be in the unlatched
position before they are inserted into their connec-
tor receptacles on the ORC or they may become
damaged.

3. Reconnect the two body wire harness connectors (1) to the ORC connector receptacles located on the forward

facing side of the module. Be certain that the latches on both connectors are each fully engaged.

4. Reinstall the center console onto the top of the floor panel transmission tunnel. (Refer to 23 - BODY/INTERIOR/

FLOOR CONSOLE - INSTALLATION).

5. Do not reconnect the battery negative cable at this time. The supplemental restraint system verification test pro-

cedure should be performed following service of any supplemental restraint system component. (Refer to 8 -
ELECTRICAL/RESTRAINTS - STANDARD PROCEDURE - VERIFICATION TEST).

RESTRAINTS - SERVICE INFORMATION

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PASS AIRBAG ON/OFF INDICATOR

DESCRIPTION

Vehicles equipped with the Occupant Classification
System (OCS) include a passenger airbag on/off indi-
cator (3), which is located below the passenger side
inboard air outlet on the instrument panel above the
glove box. The passenger airbag on/off indicator con-
sists of a molded plastic housing with an integral con-
nector receptacle (1) at the back, an integral latch tab
(2) on each side, and a rectangular dark translucent
outer lens.

The opaque text “PASS AIRBAG OFF” and an opaque
International Control and Display Symbol icon for
“Passenger Airbag Off or Not Available” are imprinted
on the back of the lens within the indicator. The dark
outer lens prevents the indicator text and icon from
being clearly visible when it is not illuminated. An
amber Light Emitting Diode (LED) behind the lens
causes the “PASS AIRBAG OFF” text and icon to
appear silhouetted against an amber field through the
translucent lens when the indicator is illuminated from
behind by the LED.

The passenger airbag on/off indicator cannot be repaired or adjusted and, if faulty or damaged, the indicator unit
must be replaced.

OPERATION

In the Occupant Classification System (OCS), the passenger airbag on/off indicator gives an indication when the
passenger airbag and seat belt tensioner deployment circuits are disabled by the Occupant Restraint Controller
(ORC). This 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 Controller Area Net-
work (CAN) data bus from the Occupant Classification Module (OCM).

The passenger airbag on/off 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 provided
a path to ground by the ORC transistor. The ORC will turn on the passenger airbag on/off indicator for the following
reasons:

•

Bulb Test - Each time the ignition switch is turned to the On position the passenger airbag on/off indicator is
illuminated for about six seconds.

•

Child Seat Detected (or Load Less Than Minimum Weight Threshold) Occupant Classification Message
- Each time the ORC receives a message from the OCM indicating a child seat has been detected in the
passenger side front seat (or that the seat load is less than a minimum weight threshold) the passenger airbag
and seat belt tensioner deployment circuits are deactivated and the passenger airbag on/off indicator will be
illuminated. The indicator remains illuminated until the ORC receives an occupant classification message indi-
cating that the passenger side front seat is empty, that the seat is occupied by a load equal to or greater than
a minimum weight threshold, or until the ignition switch is turned to the Off position, whichever occurs first.

•

Load Undetermined Occupant Classification Message - Each time the ORC receives a message from the
OCM indicating that a load cannot be determined in the passenger side front seat, the passenger airbag and
seat belt tensioner deployment circuits are deactivated and the passenger airbag on/off indicator will be illu-
minated. The indicator remains illuminated until the ORC receives an occupant classification message indicat-
ing that the passenger side front seat is empty, that 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 occurs first.

•

Communication Error - If the ORC receives invalid occupant classification messages or no messages from
the OCM, the passenger airbag on/off indicator is illuminated. The indicator remains illuminated until the ORC

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RESTRAINTS - SERVICE INFORMATION

receives a valid message from the OCM indicating that the passenger side front seat is empty, that the seat is
occupied by a load equal to or greater than a minimum weight threshold, or until the ignition switch is turned
to the Off position, whichever occurs first.

The ORC continually monitors the occupant classification messages from the OCM to decide whether the passenger
airbag and seat belt tensioner deployment circuits should be activated or deactivated. Note that there may be sev-
eral seconds of delay between changes in the detected occupant status and passenger airbag on/off 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 provides the proper control output to turn
the passenger airbag on/off indicator 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 CAN data bus, or the electronic message inputs to the ORC that control the passenger airbag
on/off indicator, a diagnostic scan tool is required. Refer to the appropriate diagnostic information.

REMOVAL

WARNING: To avoid personal injury or death, on vehicles equipped with airbags, disable the supplemental
restraint system before attempting any steering wheel, steering column, airbag, occupant classification sys-
tem, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect
and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge
before performing further diagnosis or service. This is the only sure way to disable the supplemental
restraint system. Failure to take the proper precautions could result in accidental airbag deployment.

1. Disconnect and isolate the battery negative cable.

Wait two minutes for the system capacitor to dis-
charge before further service.

2. Remove the radio (2) from the instrument panel.

(Refer

ELECTRICAL/AUDIO/RADIO

REMOVAL).

3. Reach through the instrument panel radio opening

to access the back of the passenger airbag on/off
indicator (1).

4. From the back of the indicator, depress the two

latches on the sides of the indicator housing and
push the indicator out through the face of the
instrument panel.

5. From the face of the instrument panel, pull the indi-

cator out far enough to access and disconnect the
wire harness connector (3) from the back of the
indicator housing.

INSTALLATION

RESTRAINTS - SERVICE INFORMATION

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1. From the face of the instrument panel, reconnect

the wire harness connector (3) to the receptacle on
the back of the passenger airbag on/off indicator
housing (1). Be certain that the connector is fully
engaged in the receptacle.

2. Using hand pressure, push the indicator firmly and

evenly into the mounting hole in the instrument
panel until the two latches on the sides of the indi-
cator housing are fully engaged on the back of the
panel.

3. Reinstall the radio (2) into the instrument panel.

(Refer

ELECTRICAL/AUDIO/RADIO

INSTALLATION).

4. Do not reconnect the battery negative cable at this

time. The supplemental restraint system verification
test procedure should be performed following ser-
vice of any supplemental restraint system compo-
nent. (Refer to 8 - ELECTRICAL/RESTRAINTS -
STANDARD PROCEDURE - VERIFICATION TEST).

5. Following successful completion of the supplemental restraint system verification test procedure, perform the

Occupant Classification System Verification Test using a diagnostic scan tool. Refer to the appropriate diagnostic
procedures.

AIR BAG-PASSENGER

DESCRIPTION

The horizontal surface of the injection molded, thermo-
plastic passenger airbag door (1) is the most visible
part of the passenger airbag. The passenger airbag
door is located above the glove box opening on the
top of the instrument panel (2) in front of the front seat
passenger seating position.

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