Hyundai Sonata: Air Conditioning System / In-car Sensor Repair procedures

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 following information.
(1) Self diagnosis: Checking the failure code (DTC) and display.
(2) Current data: Checking the system input/output data state.
(3) Actuation test: Checking the system operation condition.
(4) Additional function: Other controlling such as he system option and zero point adjustment.
2.
Select the 'Car model' and the system to be checked in order to check the vehicle with the tester.
3.
Select the 'Current data' menu to search the current state of the input/output data.
The input/output data for the sensors corresponding to the In-car Sensor can be checked.

In-car Sensor Description and Operation
Description 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 temperatu ...

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 r ...

Other information:

Hyundai Sonata LF 2014-2019 Owners Manual: Do Not Install a Child Restraint in the Front Passenger's Seat
Even though your vehicle is equipped with the OCS, never install a child restraint in the front passenger's seat. An inflating air bag can forcefully strike a child or child restraint resulting in serious or fatal injury. WARNING NEVER place a rear-facing or front-facing child restraint in the ...

Hyundai Sonata LF 2014-2019 Owners Manual: ECO mode
When the Drive Mode is set to ECO mode, the engine and transmission control logic are changed to maximize fuel efficiency. When the ECO mode is selected by pressing the DRIVE MODE button, the ECO indicator will illuminate. If the vehicle is set to ECO mode, when the engine is turned OFF and r ...

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