Hyundai Elantra: Convenient Features of Your Vehicle / Light

Exterior Lights

Lighting control To operate the lights, turn the knob at the end of the control lever to one of the following positions: 1. OFF position 2. AUTO headlamp position (if equipped) 3. Parking lamp ...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Input Speed Sensor Description and Operation
Description Input speed sensor is a vital unit that measures the rate of rotation of the input shaft inside the transaxle and delivers the readings to the TCM. The sensor provides critical input data that's used in feedback control, damper clutch control, gear setting control, line pressu ...

Hyundai Elantra AD (2016-2020) Owners Manual: Sensor to Detect Distance to the Vehicle Ahead
The Smart Cruise Control uses a sensor to detect distance to the vehicle ahead. If the sensor is covered with dirt or other foreign matter, the vehicle to vehicle distance control may not operate correctly. Always keep the sensor clean. Warning message Smart Cruise Control disabled. Radar ...