Components and Components LocationHyundai Elantra AD (2016-2020) Service Manual: Heater & A/C Control Unit (Manual) Components and Components Location
Components
ConnectorPin NOFunctionConnectorPin NOFunctionA1LowB18ILL- (RHEO)2Common19Sensor ground3Ground20Ground4Middle Low21Battery (+)5Middle High22ISG DC6High23ISG B+B1IGN224ILL+ (TAIL)2PAB IGN125Sensor REF (+5V)3HTD (Rear defog indicator)26EVAP sensor (+)4Detent Out (-)27AMB sensor (+)5PTC ...
Hyundai Elantra AD (2016-2020) Service Manual: Refrigerant Line Repair procedures
Replacement
1.
If the compressor is marginally operable, run the engine at
idle speed, and let the air conditioning work for a few minutes, then
shut the engine off.
2.
Disconnect the negative (-) battery terminal.
3.
Recover the refrigerant with a recovery / charging station.
...