Chrysler 2005 Crossfire SRT6 Service Manual page 1445

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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