The immobilizer system protects your vehicle from theft. If an improperly coded key (or other device) is used, the engine's fuel system is disabled.
When the ignition switch is placed in the ON position, the immobilizer system indicator should come on briefly, then go off. If the indicator starts to blink, the system does not recognize the coding of the key.
Place the ignition switch to the LOCK/OFF position, then place the ignition switch to the ON position again.
The system may not recognize your key's coding if another immobilizer key or other metal object (i.e., key chain) is near the key. The engine may not start because the metal may interrupt the transponder signal from transmitting normally.
If the system repeatedly does not recognize the coding of the key, it is recommended that you contact your HYUNDAI dealer.
Do not attempt to alter this system or add other devices to it. Electrical problems could result that may make your vehicle inoperable.
WARNING
In order to prevent theft of your vehicle, do not leave spare keys anywhere in your vehicle. Your immobilizer password is a customer unique password and should be kept confidential.
NOTICE
The transponder in your key is an important part of the immobilizer system. It is designed to give years of trouble-free service, however you should avoid exposure to moisture, static electricity and rough handling. Immobilizer system malfunction could occur.
Information
This device complies with Part 15 of the FCC rules.
Operation is subject to the following three conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired operation.
3. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the device.
Smart Key
Door LocksHyundai Elantra AD (2016-2020) Owners Manual: High Mounted Stop Light Replacement
1. Open the trunk.
2. Remove the socket by turning it counterclockwise until the tabs on the socket
align with the slots.
3. Remove the bulb from the socket by pressing it in and rotating it counterclockwise
until the tabs on the bulb align with the slots in the socket. Pull the bulb out
...
Hyundai Elantra AD (2016-2020) Service Manual: Schematic Diagrams
Schematic Diagrams
Termianal function
Wire No.DesignationCurrent maxmin13Ground for recirculation pump39 A10 A1Voltage supply for pump motor39 A10 A25Voltage supply for solenoid valves15 A2 A38Ground for solenoid valves and ECU15 A2 A22Signal wheel speed sensor FL16.8 mA5.9 mA33Voltage supply ...