

Curtain air bags are located along both sides of the roof rails above the front and rear doors.
They are designed to help protect the heads of the front seat occupants and the rear outboard seat occupants in certain side impact collisions.
The curtain air bags are designed to deploy during certain side impact collisions, depending on the crash severity.
The side and curtain air bags on both sides of the vehicle may deploy if a rollover or possible rollover is detected.
The curtain air bags are not designed to deploy in all side impact or rollover situations.
WARNING
To reduce the risk of serious injury or death from an inflating curtain air bags, take the following precautions:
Side air bags
How Does the Air Bag System Operate?Hyundai Elantra AD (2016-2020) Owners Manual: LCD Display Messages
Shift to P or N to start engine (for smart key system and Intelligent Variable
Transmission (IVT)/dual clutch transmission)
This warning message is displayed if you try to start the engine with the shift
lever not in the P (Park) or N (Neutral) position.
Information
You can start the engine w ...
Hyundai Elantra AD (2016-2020) Service Manual: Variable Intake Solenoid(VIS) Actuator Repair procedures
Removal and Installation
1.
Disconnect the vacuum hose (A).
2.
Remove the variable Intake solenoid (VIS) actuator connector (B) and actuator (C).
Tightening torque :
9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)
3.
Install in the reverse order of removal. ...