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: Photo Sensor Description and Operation
Description The photo sensor is located at the center of the defrost nozzles. The photo sensor contains a photovoltaic (sensitive to sunlight) diode. The solar radiation received by its light receiving portion, generates an electromotive force in proportion to the amount of radiation rece ...

Hyundai Elantra AD (2016-2020) Service Manual: Photo Sensor Repair procedures
Inspection 1. Turn the ignition switch ON. 2. Connect the GDS. 3. Emit intensive light toward the photo sensor using a lamp, and check the output voltage change. 4. The voltage will rise with higher intensive light and reduce with lower intensive light. 1. Auto light signal2. Auto ...