Beretta V6-3100 3.1L MFI VIN M (1994)
Vehicle Speed Sensor: Description and Operation
Circuit Operation
The Vehicle Speed Sensor is a gear-driven Permanent Magnet Generator housed in the vehicle's transaxle. This sensor generates a sine wave output with
a frequency proportional to vehicle speed. The ECM converts this signal to an output that is switched to ground at a frequency of 4000 pulses per mile
at the DK GRN/WHT (817 CKT) wire output. This output is pulled up to 5 volts or greater by the components that use this speed signal as an input.
