Sunfire L4-138 2.3L DOHC VIN D MFI (1995)
Vehicle Speed Sensor: Description and Operation
Circuit Operation
The Vehicle Speed Sensor is a gear-driven Permanent Magnet Generator housed in the vehicles 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 DK GRN/WHT (817 CKT) wire output. This output varies from 16 volts to battery voltage.
