Black Box
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Black Box
Anyone know what the black box is under the center seat. I was thinking of building a downward facing sub in the seats place, similar to the one Jason2922 built, but was worried a magnet vibrating over the box might cause a problem. Thanks.
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From: Albany, NY
ORC, or Occupant restraint controller
Mine is located under the middle seat upfront. Atleast it is for the 3rd Gen.
I would say a magnet too close WILL CAUSE PROBLEMS!!! It's a capacitor equipt device and magnets will alter polatiry of it. Might cause failure or premature airbag deployment.
Sorry I couldn't get a picture, the Adobe file is copyrighted and wont allow me to copy the images. I have to download a neat cut and paste tool to get past all that. At any rate.....
Here's what I just looked up in Service Manual for quick def;
internal faults, the stored DTC is latched forever.
Mine is located under the middle seat upfront. Atleast it is for the 3rd Gen.
I would say a magnet too close WILL CAUSE PROBLEMS!!! It's a capacitor equipt device and magnets will alter polatiry of it. Might cause failure or premature airbag deployment.
Sorry I couldn't get a picture, the Adobe file is copyrighted and wont allow me to copy the images. I have to download a neat cut and paste tool to get past all that. At any rate.....
Here's what I just looked up in Service Manual for quick def;
OCCUPANT RESTRAINT CONTROLLER
DESCRIPTION
The Occupant Restraint Controller (ORC) (1) is
located in the passenger compartment of the vehicle,
where it is secured by three nuts to three studs on a
stamped steel mounting bracket welded onto the top
of the floor panel transmission tunnel under the center
front seat section or the center floor console, as the
vehicle is equipped. Concealed within a hollow in the
center of the die cast aluminum ORC housing is the
electronic circuitry of the ORC which includes a microprocessor,
an electronic impact sensor, an electronic
safing sensor, and an energy storage capacitor. A
stamped metal cover plate is secured to the bottom of
the ORC housing with screws to enclose and protect
the internal electronic circuitry and components.
DESCRIPTION
The Occupant Restraint Controller (ORC) (1) is
located in the passenger compartment of the vehicle,
where it is secured by three nuts to three studs on a
stamped steel mounting bracket welded onto the top
of the floor panel transmission tunnel under the center
front seat section or the center floor console, as the
vehicle is equipped. Concealed within a hollow in the
center of the die cast aluminum ORC housing is the
electronic circuitry of the ORC which includes a microprocessor,
an electronic impact sensor, an electronic
safing sensor, and an energy storage capacitor. A
stamped metal cover plate is secured to the bottom of
the ORC housing with screws to enclose and protect
the internal electronic circuitry and components.
OPERATION
The microprocessor in the Occupant Restraint Controller (ORC) contains the supplemental restraint system logic
circuits and controls all of the supplemental restraint system components. The ORC uses On-Board Diagnostics
(OBD) and can communicate with other electronic modules in the vehicle as well as with the diagnostic scan tool
using the Controller Area Network (CAN) data bus. This method of communication is used for control of the airbag
indicator in the ElectroMechanical Instrument Cluster (EMIC) and for supplemental restraint system diagnosis and
testing through the 16-way Data Link Connector (DLC) located on the driver side lower edge of the instrument
panel. (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER/AIRBAG INDICATOR - OPERATION).
The ORC microprocessor continuously monitors all of the supplemental restraint system electrical circuits to determine
the system readiness. If the ORC detects a monitored system fault, it sets an active and stored Diagnostic
Trouble Code (DTC) and sends electronic messages to the EMIC over the CAN data bus to turn on the airbag
indicator. An active fault only remains for the duration of the fault, or in some cases for the duration of the current
ignition switch cycle, while a stored fault causes a DTC to be stored in memory by the ORC. For some DTCs, if a
fault does not recur for a number of ignition cycles, the ORC will automatically erase the stored DTC. For other
The microprocessor in the Occupant Restraint Controller (ORC) contains the supplemental restraint system logic
circuits and controls all of the supplemental restraint system components. The ORC uses On-Board Diagnostics
(OBD) and can communicate with other electronic modules in the vehicle as well as with the diagnostic scan tool
using the Controller Area Network (CAN) data bus. This method of communication is used for control of the airbag
indicator in the ElectroMechanical Instrument Cluster (EMIC) and for supplemental restraint system diagnosis and
testing through the 16-way Data Link Connector (DLC) located on the driver side lower edge of the instrument
panel. (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER/AIRBAG INDICATOR - OPERATION).
The ORC microprocessor continuously monitors all of the supplemental restraint system electrical circuits to determine
the system readiness. If the ORC detects a monitored system fault, it sets an active and stored Diagnostic
Trouble Code (DTC) and sends electronic messages to the EMIC over the CAN data bus to turn on the airbag
indicator. An active fault only remains for the duration of the fault, or in some cases for the duration of the current
ignition switch cycle, while a stored fault causes a DTC to be stored in memory by the ORC. For some DTCs, if a
fault does not recur for a number of ignition cycles, the ORC will automatically erase the stored DTC. For other
internal faults, the stored DTC is latched forever.
Last edited by dirtydog; Aug 16, 2012 at 11:42 AM.
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Been stuck in 1985 for years. I still built the sub but have the speaker facing the rear seat instead of facing down, well away from the sensor. Thanks for the info.