Daytona Shelby V6-181 3.0L SOHC (1991)
The Mechanical Instrument Cluster (MIC) operates the same way it has in previous years with the exception of three functions operated by the body
controller. These functions are:
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Seat Belt Warning Lamp: The body controller turns on the seat belt warning lamp for 6+1-2 seconds when the ignition is turned on.
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Low Fuel Warning Lamp: The body controller turns on the low fuel lamp when the fuel tank is at 2.773 gallons including tank reserve.
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Check Gages Lamp: The body controller turns on the "CHECK GAGES" lamp when the engine controller issues a high temperature warning
and/or a charging system failure via the CCD bus system.
Remote Keyless Entry (RKE) /Vehicle Theft Security System (VTSS)
The Vehicle Theft Alarm (VTA) is a logic-controlled system. It monitors the vehicle doors, hood, key cylinder, and ignition for unauthorized operation.
The system has the following components: Vehicle Theft Alarm Control Module; two door ajar switches; hood ajar switch and striker; two door key
cylinder disarming switches; instrument panel "set" lamp; engine controller; horn and horn relay; park and tail lamps; power door lock circuits; ignition
switch.
When an unauthorized entry to the vehicle occurs, the VTA module sends a message via the CCD bus to the engine controller that it is not OK to start
the engine. The engine controller then zeroes out the pulse width to the fuel injectors after the engine has been started, thus shutting down the engine
(start and stall condition).
The VTA module has the capability of providing bias on the CCD bus when the body controller is powered down.
To avoid both an audible alarm and the engine kill feature causing a problem in the assembly plant, an initialization procedure is included in the VTA
system. This procedure requires that the vehicle has recorded 20 engine cranks. Therefore, the VTA system will not be functional on all vehicles and will
require dealer verification.
In addition, when an engine controller has been replaced, 20 engine cranks must be reached before the theft alarm becomes operational.
System Description and Functional Operation
The vehicle systems that are a part of the "body" system are the:
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EVIC Panel Monitor
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Electronic Instrument Cluster (EIC)
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Vehicle Theft Alarm
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Headlamp Doors
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Automatic Door Locks
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Intermittent Wipers
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Illuminated Entry
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Courtesy Lamps
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Traveler
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Compass Temperature Module
The body system consists of a combination of modules that communicate over the CCD bus. Through the CCD bus, information about the operation of
vehicle components and circuits is relayed quickly to the appropriate module(s). Each module receives the same information about a component or
circuit as another module does. This significantly reduces the complexity of the wiring in the vehicle and the size of wiring harnesses.
All of the information about the functioning of all of the systems is organized, controlled, and communicated by the "CCD bus," which is described in
the following sections.
Traveler
The Traveler module is located in the dash just right of the steering column (same location as the EVIC panel). It provides the driver with navigational
information such as average fuel economy, instant fuel economy, distance to empty (DTE), estimated time (ET), and trip odometer (ODO).
The Traveler receives messages about fuel and odometer information from the body and engine controllers via the CCD bus.
