Santa Fe L4-2.4L (2001)
2.
Electrical sensor (reed switch type) mounted to the speedometer head unit. This sensor is driven by magnets mounted on the speedometer shaft,
which is driven by the speedometer cable.
The main functions of the VSS are to:
1.
Send a signal to the speedometer -- input to the speedometer (except for vehicles equipped with a speedometer cable and reed switch VSS).
2.
Send a signal to the ECM/TCM (this signal is typically used by the ECM/TCM for diagnostic purposes).
RIGHT FRONT WHEEL SPEED SENSOR (RF-WSS):
Some Hyundai Vehicles incorporate a sensor on the right front hub. This sensor reads a "tone-wheel" mounted on the right front axle assembly. The
sensor and tone-wheel function very similarly to the crankshaft position sensor. The main function of this sensor is to send a signal directly to the ECM.
When driving over a very rough road, the engine will experience a sharply varying load, transferred from the wheels to the crankshaft, which may
incorrectly appear to be an engine misfire to the ECM misfire diagnostic logic (based on the analysis of the crankshaft position sensor signal). The RF-
WSS is used to minimize inaccurate diagnoses that an engine misfire has occurred.
