GM Service Manual Online
For 1990-2009 cars only
RFA-Data List-Battery Voltage: Battery Voltage Status

RFA-Input List-Key In Ignition: The current status of the ignition key

RFA-Outputs-Horn Output: The current status of the horns

RFA-Outputs-Security Lamp Output: The currect status of the security indicator

RFA-Outputs-Courtesy Lamp Output: The currect status of the courtesy lamps

RFA-Outputs-Aware Output: 

RFA-Outputs-Perimeters Lamp Output: The currect status of the perimeters lamps

RFA-Outputs-Exterior Lamp Output: The currect status of the headlamps

RFA-Outputs-RAP Output: The currect status of the RAP System

RFA-Key FOB Information-Last FOB Used: Last recognized FOB used to operate vehicle

RFA-Key FOB Information-Last Key Pressed On FOB: Last recognized FOB command

RFA-Key FOB Information-# of FOBs Programmed: Memory of FOBs Programmed

VTD -- Data List -- Prom I.D.: This is the modules internal "Prom" identifier.

VTD-- Data List -- 8 Digit GM Part Number: The scan tool displays the control module part number.

VTD -- Data List -- Auto Learn Timer: The current state of the 10 minute timer, which must "time out" three times in order for the relearn procedure to be authorized.

VTD -- Data List -- Seed and Key Timer: This state must "time out" for the relearn to occur.

VTD -- Data List -- # of Key Codes Learned:  The number of transponder values learned by the VTD controller module.

VTD -- Data List -- Ignition Counter: The module counts each time the ignition is cycled.

VTD -- Data List -- Power Mode Change: The scan tool displays when the vehicles power source has changed from ON, IGN, or RAP

VTD -- Data List -- Manual Enable Counter:  This data value is for use at the assembly plant.

VTD -- Data List -- Security Lamp Status: The scan tool monitors the status of the security indicator in the instrument panel.