The SMART mode may be limited in following situations. (The OFF indicator illuminates in those situations.)
Hyundai Sonata LF 2014-2019 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 Sonata LF 2014-2019 Service Manual: Oil Pump Components and Components Location
Components
1. Timing chain cover2. Inner rotor3. Outer rotor4. Pump cover
...