Operating Door Locks from Outside the Vehicle
Mechanical key

If you lock the driver's door with a mechanical key, all vehicle doors will lock. If you unlock the driver's door with a mechanical key, the driver's door will unlock and the passenger doors will unlock according to the current two press unlock setting.
Once the doors are unlocked, they may be opened by pulling the door handle.
When closing the door, push the door by hand. Make sure that doors are closed securely.
Remote key

To lock the doors, press the Door Lock button (1) on the remote key. Press the Door Unlock button (2) on the remote key, the driver's door will unlock. If you press the Door Unlock button on the remote key again within four seconds, then all the doors will unlock.
Once the doors are unlocked, they may be opened by pulling the door handle.
When closing the door, push the door by hand. Make sure that doors are closed securely.
Information
Immobilizer System
Smart keyHyundai Elantra AD (2016-2020) Service Manual: SRS Control Module (SRSCM) Components and Components Location
Components
1. Supplemental Restraint System Control Module (SRSCM)
Supplemental Restraint System Control Module (SRSCM)
NoConnector AConnector B1IGN 1Ground2Driver front impact sensor - High (+)Driver seat belt pretensioner - High (+)3Driver front impact sensor - Low (-)Driver seat belt p ...
Hyundai Elantra AD (2016-2020) Owners Manual: Trunk
Opening the trunk
â– Outside (if equipped)
1. Make sure the shift lever is in P (Park).
2. Then do one of the following :
Hold down the trunk unlock button located on your key fob or smart key for
more than 1 second.
Additionally, for vehicles equipped with smart key :
- While all d ...