Chrysler Crossfire. Manual - part 341

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM
BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIR-
BAG, SIDE IMPACT SENSOR OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCON-
NECT 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 AND POSSIBLE PER-
SONAL INJURY.

1. During the following test, the battery negative cable remains disconnected and isolated, as it was during the SRS

component removal and installation procedures.

2. Connect the DRBIII

to the Data Link Connector (DLC).

3. Exit the vehicle but maintain contact with the DRBIII

4. Turn the ignition switch to the On position.

5. Check to be certain that there are no occupants in the vehicle, then reconnect the battery negative cable.

6. Using the DRBIII

, read and record any active (current) Diagnostic Trouble Code (DTC) data.

7. Next, use the DRBIII

to read and record any stored (historical) DTC data.

8. If any DTCs are found, refer to the appropriate diagnostic information.

9. Use the DRBIII

to erase any stored DTC data.

10. Turn the ignition switch to the Off position for approximately fifteen seconds, and then back to the On position.

Observe the airbag warning indicator in the instrument cluster for proper operation. If a fault is detected, refer
to the appropriate diagnostic information.

SPECIFICATIONS

TORQUE CHART - RESTRAINTS

TORQUE SPECIFICATIONS

DESCRIPTION

N·m

Ft. Lbs.

In. Lbs.

Seat Belt Buckle Bolt

310

Seat Belt Guide Fitting

Bolt

310

Occupant Restraint

Controller Bolts to Vehicle

Floor

Side Impact Sensor Bolts

106

Passenger Airbag to

Instrument Panel Bolts

106

Airbag to Steering Wheel

Screw

Seat Belt End Fitting Bolt

Seat Belt Tensioner (SBT)

to B Pillar Bolt

RESTRAINTS - SERVICE INFORMATION

8O - 87

OCCUPANT RESTRAINT CONTROLLER

DESCRIPTION

The Occupant Restraint Controller (ORC) is located
on the floor beneath the center console. It is secured
by four screws to a stamped steel mounting bracket.

The arrow which is printed on the label located on the
top of the ORC housing (1) provides a visual verifica-
tion of the proper orientation and should always face
the front of the vehicle.

The ORC cannot be repaired or adjusted, and if dam-
aged or faulty, it must be replaced.

OPERATION

The microprocessor in the Occupant Restraint Controller (ORC) contains the Supplemental Restraint System (SRS)
logic circuits and controls all of the SRS components. The Occupant Restraint Controller (ORC) uses On-Board
Diagnostics (OBD) and Controller Area Network (CAN) to communicate with other electronic modules in the vehicle
as well as with the DRBIII

scan tool.

The Occupant Restraint Controller (ORC) microprocessor continuously monitors all of the Supplemental Restraint
System (SRS) electrical circuits to determine the system status. If the Occupant Restraint Controller (ORC) detects

8O - 88

RESTRAINTS - SERVICE INFORMATION

a monitored system fault, it sets an active and a stored Diagnostic Trouble Code (DTC). A message is sent to the
Instrument Cluster (IC) over the Controller Area Network (CAN) data bus to illuminate the airbag warning indicator
lamp.

The Occupant Restraint Controller (ORC) also monitors the seat belt switch which is located internal to each of the
front seat belt buckles to determine whether the seat belts are fastened properly. If the seat belt is not fastened a
signal is sent to the Instrument Cluster (IC) over the Controller Area Network (CAN) data bus to illuminate the seat-
belt indicator lamp.

The Occupant Restraint Controller (ORC) receives battery current through two circuits; a fused ignition switch output
(RUN) circuit through a fuse in the underhood accessory fuse block, and a fused ignition switch output (START-
RUN) circuit through a second fuse in the underhood accessory fuse block. The Occupant Restraint Controller
(ORC) is grounded through a ground circuit of the instrument panel floor wire harness. This has a single eyelet
terminal connector secured by the bolt to the Occupant Restraint Controller (ORC) mount on the floor panel of the
transmission tunnel. These connections allow the Occupant Restraint Controller (ORC) to be operational whenever
the ignition switch is in the Start or On positions.

The Occupant Restraint Controller (ORC) also contains a capacitor. When the ignition switch is in the Start or On
positions, this capacitor is continually being charged with enough voltage to deploy the airbags for up to one second
following a battery disconnect or failure. The purpose of the capacitor is to provide backup SRS protection in case
there is a loss of battery current supply to the Occupant Restraint Controller (ORC) during an impact.

Two sensors are contained within the Occupant Restraint Controller (ORC), an electronic impact sensor and a saf-
ing sensor. The Occupant Restraint Controller (ORC) also monitors inputs from two remote side impact sensors
located under the carpet directly below the front seats, to control the deployment of the side impact airbag units.

The safing sensor is an electronic accelerometer sensor within the Occupant Restraint Controller (ORC) that pro-
vides an additional logic input to the Occupant Restraint Controller (ORC) microprocessor. The safing sensor is
used to verify the need for a Supplemental Restraint System (SRS) deployment by detecting the impact energy of
a collision. The impact energy must exceed the safing threshold in order for the airbags to deploy.

Pre-programmed decision algorithms in the Occupant Restraint Controller (ORC) microprocessor determine when
the deceleration rate indicates an impact that is severe enough to require supplemental restraint system protection.
Based upon the status of the seat belt switch inputs and the severity of the monitored impact, determines the level
of front airbag deployment force required for each front seating position. When the programmed conditions are met,
the Occupant Restraint Controller (ORC) sends the proper electrical signals to deploy the front airbags and the Seat
Belt Tensioner’s (SBT) at the programmed force levels.

The Occupant Restraint Controller (ORC) determines the level of front air bag deployment force for each seating
position based on the seat belt switch input status and the severity of the impact. When the predetermined impact
conditions are met the Occupant Restraint Controller (ORC) deploys the front airbags and activates the Seat Belt
Tensioner’s (SBT).

STANDARD PROCEDURE - ORC PROGRAMMING

This procedure requires the use of the DRBIII

scan tool.

After the Occupant Restraint Controller (ORC) has been replaced, the Airbag Warning Indicator Light in the Instru-
ment Cluster flashes. This indicates that the ORC has not yet been programmed. Follow this procedure using the
DRBIII

scan tool:

•

The side airbag equipment is programmed to YES on the parts control modules.

•

The seatbelt buckle equipment is programmed to YES.

•

The passenger seat occupant simulator is programmed to YES.

•

The front passenger airbag is programmed to YES.

•

Turn the ignition to off and then on.

•

Read out and erase any DTCs.

At this time the Airbag Warning Indicator Light will flash on and off to conclude the programming. When a front
passenger airbag is retrofitted, the ORC only needs to be reprogrammed, not replaced. After finishing this proce-
dure, any programming failure is due to a defective ORC.

RESTRAINTS - SERVICE INFORMATION

8O - 89

REMOVAL

WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM
BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, DRIVER AIRBAG, PASSENGER AIR-
BAG, FRONT IMPACT SENSOR, SIDE IMPACT SENSOR, SIDE IMPACT AIRBAG, 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 AND POSSIBLE PERSONAL INJURY.

WARNING: THE OCCUPANT RESTRAINT CONTROLLER CONTAINS THE IMPACT SENSOR, WHICH
ENABLES THE SYSTEM TO DEPLOY THE SUPPLEMENTAL RESTRAINTS. NEVER STRIKE OR DROP THE
OCCUPANT RESTRAINT CONTROLLER, AS IT CAN DAMAGE THE IMPACT SENSOR OR AFFECT ITS CALI-
BRATION. IF AN OCCUPANT RESTRAINT CONTROLLER IS ACCIDENTALLY DROPPED DURING SERVICE,
THE MODULE MUST BE SCRAPPED AND REPLACED WITH A NEW UNIT. FAILURE TO OBSERVE THIS
WARNING COULD RESULT IN ACCIDENTAL, INCOMPLETE, OR IMPROPER SUPPLEMENTAL RESTRAINT
DEPLOYMENT AND POSSIBLE OCCUPANT INJURIES.

1. Disconnect the negative battery cable (2). Wait two

minutes for the system capacitor to discharge
before further service.

2. Remove the center console. (Refer to 23 - BODY/

INTERIOR/CENTER CONSOLE - REMOVAL).

3. Disconnect the occupant restraint controller har-

ness connector (2).

4. Remove the bolts (1) attaching the occupant

restraint controller to the transmission tunnel.

5. Remove the occupant restraint controller from the

vehicle.

8O - 90

RESTRAINTS - SERVICE INFORMATION

Content .. 339 340 341 342 ..