Hyundai Elantra AD (2016-2020) Service Manual: Knock Sensor (KS) Repair procedures
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the knock sensor connector (A).
3.
Remove the intake manifold.
(Refer to Engine Mechanical System - "Intake Manifold")
4.
Remove the installation bolt (A), and then remove the sens ...
Hyundai Elantra AD (2016-2020) Owners Manual: Battery Recharging
WARNING
Always follow these instructions when recharging your vehicle's battery to
avoid the risk of SERIOUS INJURY or DEATH from explosions or acid burns:
Before performing maintenance or recharging the battery, turn off all
accessories and place the ignition switch to the LOCK/OFF po ...