Turn the knob to the right to increase the fan speed and airflow. Turn the knob to the left to decrease fan speed and airflow.
Setting the fan speed control knob to the "0" position turns off the fan.
Hyundai Sonata LF 2014-2019 Owners Manual: Hood
Opening the hood
1. Park the vehicle and set the parking brake.
2. Pull the release lever to unlatch the hood. The hood should pop open slightly.
3. Raise the hood slightly, push the secondary latch up (1) inside of the hood
center and lift the hood (2). After it has been raised about halfway, it ...
Hyundai Sonata LF 2014-2019 Service Manual: Input shaft speed sensor 1 Specifications
Specification
ItemSpecificationTypeHall effect sensorOperation condition (°C)°F(-40 ~ 150)-40 ~ 302Output signal (mA)High: 11.8 ~ 16.8Low: 5.9 ~ 8.4
...