Elantra GLS Sedan L4-2.0L (1999)
Steering Angle Sensor: Description and Operation
ANGULAR VELOCITY SENSOR
Electronic Power Steering (EPS) equipped vehicle has an Angular Velocity Sensor (AVS) in multi-function switch. AVS is composed of a set of
photo interrupters (Light Emitting Diode [LED]), photo TR and slitted disc).
The slitted disc has 18 outer slits for detecting the steering wheel rotating direction and angular speed. And a inner slit is provided for checking
whether the wheel position is within neutral or not. 2 sets of LED and photo TR check the rotation of steering wheel calculating the degrees per time
through on, off photo TR, and a set of LED and photo TR is used to sense the wheel location.
With the signal from the sensors, the EPS control module miscellaneously decides the current flow to solenoid valve from 0A to 1A compensating
steering wheel effort.
