Hyundai Sonata: Operating Door Locks from Inside the Vehicle / With the central door lock switch

When pressing the () switch (1), all vehicle doors will lock.

When pressing the () switch (2), all vehicle doors will unlock.

If the key is in the ignition switch and any door is opened, the doors will not lock even though the lock button (1) of the central door lock switch is pressed.

If the smart key is in the vehicle and any door is opened, the doors will not lock even though the lock button (1) of the central door lock switch is pressed.

WARNING

WARNING

Do not leave children or animals unattended in your vehicle. An enclosed vehicle can become extremely hot, causing death or serious injury to unattended children or animals who cannot escape the vehicle. Children might operate features of the vehicle that could injure them, or they could encounter other harm, possibly from someone gaining entry to the vehicle.

WARNING

Always secure your vehicle.

Leaving your vehicle unlocked increases the potential risk to you or others from someone hiding in your vehicle.

To secure your vehicle, while depressing the brake, move the shift lever to the P (Park) position, engage the parking brake, and place the ignition switch in the LOCK/OFF position, close all windows, lock all doors, and always take the key with you.

WARNING

If you stay in the vehicle for a long time while the weather is very hot or cold, there are risks of injuries or danger to life. Do not lock the vehicle from the outside when someone is in the vehicle.

CAUTION

Opening a door when something is approaching may cause damage or injury. Be careful when opening doors and watch for vehicles, motorcycles, bicycles or pedestrians approaching the vehicle in the path of the door.

Operating Door Locks from Inside the Vehicle
With the door lock button To unlock a door, push the door lock button (1) to the "Unlock" position. The red mark (2) on the door lock button will be visible. To lock a door, push the door lock b ...

Auto Door Lock/Unlock Features
Impact sensing door unlock system All doors will be automatically unlocked when an impact causes the air bags to deploy. Speed sensing door lock system All doors will be automatically locked when veh ...

Other information:

Hyundai Sonata LF 2014-2019 Service Manual: Engine And Transmission Assembly Repair procedures
Removal 1. Remove the engine cover. 2. Remove the battery and battery tray. (Refer to Engine Electrical System - "Battery") 3. Remove the air duct and air cleaner assembly. (Refer to Intake and Exhaust System - "Air Cleaner") 4. Remove the engine room under cover. (Refer to En ...

Hyundai Sonata LF 2014-2019 Service Manual: Brake Booster Repair procedures
Brake Booster Operating Test For simple checking of the brake booster operation, carry out the following tests. 1. Run the engine for one or two minutes, and then stop it. If the pedal depresses fully the first time but gradually becomes higher when depressed succeeding times, the booster ...

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