The A/C MAX mode is used to cool the inside of the vehicle more quickly. Air flow is directed toward the upper body and face.
In this mode, the air conditioning and the recirculated air position will be selected automatically.
After the vehicle interior has cooled down initially, resume using normal A/C mode. Continuous use of A/C MAX mode is not recommended.
Hyundai Sonata LF 2014-2019 Service Manual: Components and Components Location
Component Location
[Engine Room]
[Interior Relay]
...
Hyundai Sonata LF 2014-2019 Service Manual: ETC (Electronic Throttle Control) System Specifications
Specification
[Throttle Position Sensor (TPS)]
Throttle angle(°)Output Voltage (V)TPS1TPS200.504.50100.964.05201.413.59301.873.14402.322.68502.782.23603.231.77703.691.32804.140.86904.600.41984.650.35C.T (0)0.504.50W.O.T (86)4.410.59
[ETC Motor]
ItemSpecificationCoil Resistance (?)0.3 ~100 [ ...