The information provided may differ depending on which functions are applicable to your vehicle.
Hyundai Elantra AD (2016-2020) Service Manual: TPMS Receiver Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box.
(Refer to Body - "Glove Box Upper Cover Assembly")
3.
Remove the smart key unit.
(Refer to Body - "Smart Key Unit")
4.
Disconnect the body control module connectors (A).
5.
Remove the body control ...
Hyundai Elantra AD (2016-2020) Service Manual: Purge Control Solenoid Valve (PCSV) Specifications
Specification
ItemSpecificationCoil Resistance (?)22.0 ~ 26.0 [20°C(68°F)]
...