C1212 HYUNDAI - Vehicle Speed Input Malfunction
Faulty Vehicle Speed Sensor
Vehicle Speed Sensor harness is open or shorted
Vehicle Speed Sensor circuit poor electrical connection
Anti-Lock Brake System (ABS) Warning Light ON
Engine Light ON (or Service Engine Soon Warning Light)
C1212 Hyundai Description
The Vehicle Speed Sensor, located at speedometer driven gear of transaxles, applies the principal of Hall-effect. As output shaft of transaxle rotates, the rotation of the rotor, which is inside the sensor, generates Hall-effect and outputs a digital pulse. EPS CM detects vehicle speed, based on the digital pulse signal, and controls the solenoid valve current which controls the driving force of the steering wheel.