Santa Fe L4-2.4L (2001)
The RF-WSS signal is used to determine if the vehicle is going over a rough road. If the ECM determines that the vehicle is going over a rough road,
based on the "roughness" of the signal from the RF-WSS, the misfire diagnostics will be suspended until the driving conditions have changed.
VEHICLES EQUIPPED WITH ANTI-LOCK BRAKES (ABS) OR ABS/TRACTION CONTROL SYSTEM (TCS) WHICH USE THE RF-WSS TO
DETERMINE ROUGH ROAD CONDITION:
On vehicles equipped with ABS/(TCS), the RF-WSS sends a signal to the ABS Module (computer). If the vehicle uses the RF-WSS to determine rough
road condition (such as the 2001 Elantra), the ABS Module sends a signal to the ECM for use in determining the rough road condition.
The RF-WSS and the "tone-wheel" on the right front axle are the same components on ABS and Non-ABS equipped vehicles.
A malfunction of the RF-WSS will result in:
1.
The ABS light being turned ON.
2.
Diagnostic Trouble Code C1203 ("RF Wheel Sensor Open or Short") stored in the ABS Module.
NOTE:
All XG300 vehicles are equipped with ABS.
APPLICATION:
All current Hyundai vehicles are equipped with a VSS, however, not all are equipped with a RF-WSS. Vehicles which are not equipped with a RF-WSS
use other means to determine when the vehicle is traveling over a rough road (for example, the Tiburon uses a rough road sensor mounted to the left
front shock tower).
The table shows the application on the latest model vehicles.
DIAGNOSIS of the VSS and RF-WSS:
There are three main symptoms of a VSS or RF-WSS related fault:
1.
The Check Engine Light is ON and a Diagnostic Trouble Code (DTC) related to the VSS or RF-WSS is stored in the ECM/TCM/ABS Module.
2.
The speedometer is inoperative.
3.
The Vehicle Speed display on the Hi-Scan Pro (under the Engine current data menu) shows no output (display shows 0 mph while the vehicle is
moving).
