Cutlass Ciera L4-2.2L VIN 4 (1995)
Vehicle Speed Sensor: Description and 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 PCM converts this signal to an output that is switched to ground at a frequency of 4000 pulses per
mile at the CKT 389 output. This output is pulled up to 5 volts or greater by the components that use this speed signal as an input.
