Century L4-2.2L VIN 4 (1994)
Vehicle Speed Sensor: Component Tests and General Diagnostics
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 Powertrain Control Module (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.
