Vehicle Speed Sensor (VSS): Notes
WARNING: This page is about a different car, the 2005 Hyundai Accent and 2004 Hyundai Accent. However, it is still accessible from the selected car via links, so may be relevant.
The vehicle speed sensor is a hall effect sensor that is attached on the output shaft of transaxle. The sensor converts the transaxle gear revolutions into a pulse signal which is sent to the ECM.
Courtesy of HYUNDAI MOTOR CO.