For proper maintenance, safety, and maximum fuel economy, you must always maintain recommended tire inflation pressures and stay within the load limits and weight distribution recommended for your vehicle.

All specifications (sizes and pressures) can be found on a label attached to the driver's side center pillar.
Tires and Wheels
Recommended Cold Tire Inflation PressuresHyundai 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: Repair procedures
Inspection
[EVAP. Leakage Test]
1.
Select "Evap. Leakage Test".
2.
Proceed with the test according to the screen introductions.
[PCSV Inspection]
1.
Turn ignition switch OFF and disconnect the negative (-) battery cable.
2.
Disconnect the PCSV connector (A).
3.
Disconnec ...