24000 ppm VSS?

[Ludis Langens]

I've come across a PROM which appears to expect a 24000 pulse-per-mile
VSS.  Its the ANAM1667 used in the 1227748 ECM.  This PROM configures a
VSS interface chip to perform an extra "divide-by-6".  Other PROMs for
this ECM set it to "divide-by-1" mode.  The ANAM PROM also has an extra
factor of six in the VSS to vehicle speed calculation code (which gets
the VSS signal before the hardware divide).

Could this PROM be for a reluctor type VSS?  I should have kept track of
what type of car it came out of.

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/