Electrical engineers needed for this issue...
My OBD2 conversion is near complete, but I found an issue that may or may not be major, but I would like functionality nonetheless.
OBD2 cars use only 4k speed output. My 1993 uses both the 4k speed, AND a 2k speed (which is used only for the multifunction chime module). Since my new PCM does not have a 2k output, I need to either do without the chime module speed input (which I will lose the T2V function, since its the controller that controls it), or come up with a square-wave divider.
EDIT: I found schematics online to convert sine wave to square wave, which I might be able to use (take the signal from the VSS directly), and that actually might be the easiest way to go.
Welcome, downwardly mobile yuppies, to the dawn of the Age of Nefarious.
1993 SSEi - FrankenJinx - dead and gone.
1994 SSE (136K strong) - 180* t-stat,HD alternator, most unequipped SSE on the club, XM radio, Kenwood CD/MP3.
2006 Chevy Malibu Maxx LTZ - Custom 2.25" manifold-back exhaust w/FM-80. Probably the only Maxx with this system.