Hyundai Sonata: Remote keyless entry - Features of your vehicleHyundai Sonata: Remote keyless entry

Battery replacement
A smart key battery should last for several years, but if the smart key is not working properly, try replacing the battery with a new one. If you are unsure how to use your smart key or replace ...

Remote keyless entry system operations
Lock (1) All doors are locked if the lock button is pressed. If all doors, trunk and hood are closed, the hazard warning lights will blink once to indicate that all doors are locked. Also, i ...

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Body Control Module (BCM). Schematic Diagrams
BCM Connector Terminals BCM Input Signal SPEC No Input signal name Logic state ON/OFF voltage recognition level (V) Remarks ...

Illuminated engine start/stop button
Whenever the front door is opened, the engine start/stop button will illuminate for your convenience. The light will go off after about 30 seconds when the door is closed. ...

Troubleshooting
Troubleshooting Symptom Suspect area Engine will not start or struggle to start Vapor hose damaged or disconnected Engine strugg ...