Audiovox PROFESSIONAL SERIES CA 5550SST - Manual (Page 14)

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Data Bus Interface Port
This 4 pin port is used for Flashlogic Door Lock and Transponder Databus
Interfaces to communicate with the vehicle's Databus. When using the DBI port to
control the Flashlogic Door Lock and Transponder Interface modules the
following options may be available. Please refer to the D2D (Data to Data)
function list available per vehicle on the tech service web site.
Tach Input Brake Safety Shut Down
Trunk/Hatch Open Diesel Glow Plug Input
Door Lock Control Passlock / Passkey Interface (GM Only)
Dome Light Supervision Transponder Interface Activation
Factory Alarm Arm / Disarm Manual Arm / Disarm Inputs (factory keyless
controls system)
Antenna / LED / Programming Port
Mount the supplied antenna/receiver to a clear spot on the vehicle's windshield
that will not block the driver's vision. A good location is usually high on the
windshield near the rear view mirror. Be careful not to mount the antenna/receiver
on any metallic window film, as this will effect system range. Route the antenna/
receiver cable to the control module and plug into the antenna port.
Additional Ports
Tracking Port
This 4 pin port is used for Code Alarm Car Link or Vehicle Tracking accessories.