Hyundai Sonata: Air Conditioning System / In-car Sensor Description and Operation
The sensor contains a thermistor which measures the
temperature of the inside. The signal decided by the resistance value
which changes in accordance with perceived inside temperature, is
delivered to heater control unit and according to this signal the
control unit regulates incar temperature to intended value.
When changing the resistance value by sensing the temperature
caused by intake indoor air, the corresponding voltage is transmitted
to the thermostat module.

Inspection
1.
Turn the ignition switch OFF.
2.
Disconnect the evaporator temperature sensor connector.
3.
Measure the resistance between terminal "+" and "-" of the evaporator temperature ...
Diagnosis With GDS
1.
The heating, ventilation and air conditioning can be quickly diagnosed failed parts with vehicle diagnostic system (GDS).
? The diagnostic system (GDS) provides the follow ...
Other information:
Hyundai Sonata LF 2014-2019 Service Manual: Troubleshooting
Basic Troubleshooting
Basic Troubleshooting Guide
Customer Problem Analysis Sheet
Basic Inspection Procedure
Measuring Condition of Electronic Parts' Resistance
The measured resistance at high temperature after vehicle
running may be high or low. So all resistance must be measured at
ambi ...
Hyundai Sonata LF 2014-2019 Owners Manual: Storing Positions into Memory
1. Check that the shift lever is in P (Park) while the ignition switch is in
the ON position.
2. Adjust the driver’s seat position, side view mirror position and instrument
panel illumination intensity to positions comfortable for the driver.
3. Press the SET button. The system will beep once an ...