2004 Hyundai Sonata door lock functions inoperable.

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4. How to Program Keyless Entry Remotes in a Hyundai Sonata

How to Program Keyless Entry Remotes in a Hyundai Sonata By Christian Killian, eHow Contributor

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20Found This Helpful The keyless entry system in your Hyundai Sonata is part of the factory alarm system. If you have to replace a lost or damaged remote, reprogramming will be necessary. The remote is important because not only does it lock and unlock the doors, it also arms and disarms that factory alarm when you open or close your car doors. New remotes are available from any Hyundai dealer. While they will program it for you, you can do it yourself and save a programming fee.
How to Program Keyless Entry Remotes in a Hyundai Sonata(Kleophaus Livingston/Demand Media)

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Step 1: Locate the fuse panel under the dash on the driver's side of the car. Just below it is the control module for the factory alarm system. Open the cover on the alarm system control module and locate the memory switch inside.
(Kleophaus Livingston/Demand Media) Step 2: Verify that the switch is in the "Off" position; if it is not, switch it to the "Off" position. This is important for the system to understand what you want it to do when you move to the programming mode.
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Step 3: Insert the key into the ignition of your Sonata and turn the key to the "On" position. Wait for 60 seconds, then move the memory switch inside the control module to "Set."
(Kleophaus Livingston/Demand Media) Step 4: Depress and hold the "Lock" button on your remote for one full minute. This allows the remote and the control module to communicate and sync. Release the "Lock" button and turn the memory switch in the control module back to the "Off" position.
(Kleophaus Livingston/Demand Media) Step 5: Turn the ignition switch to the "Off" position and test the remote by pressing the "Lock" or "Unlock" button, verifying that the doors do lock or unlock.


Read more : http://www.ehow.com/how_6362326_program-entry-remotes-hyundai-sonata.html

It's more than likely a dead battery in the remote and/or the vehicle. The theft system may need to be reset/reprogrammed.
Another way to try to bypass it is to unlock the front doors manually with the key; that sometimes allows the car to start if it's in protect mode.

the passneger side door latch needs to be replaced. they come as a complete unit. cheers

its the power door lock actuator, the gears inside are striped and noisey, it moves internaly even if you lock or unlock it manualy, note, its tricky to find..

Yep... more information!.. same behavior when keyless remote is used?... IF SO, then you have a bad relay - door 'LOCK' relay.

dear friend-if you say that none of the doors are working with the remote it possible that your keyless entry lost its code or the main motor is faulty.try recoding first.

Since the 3 other doors respond to your keyless remote, this points to a failure in the door's power lock motor.

Repairing this yourself can be done, given that you are able to access the part itself, and can diagnose servo/motor failures.

You must take great care in removing the door panelling. This is often attached to the metal frame via plastic pegs that can break when removed forcefully. You can ease them out with the help of a flat(blade) screwdriver. Start from the part with the smallest sq.area and work your way down.

Hyundai often places plastic caps to cover screw heads, so look for these to completely remove the door panel.

If you find this too tedious to accomplish, it is best seek assistance of a qualified technician.

Hope this helps.

Where to buy 1998 Hyndai Sonata 16V ECU KESICO 39110-38640

If you use your keyfob to lock the doors, it will activate the alarm, and you will need to unlock with the keyfob. If you lock the doors with the lock button on the inside of the door, it should not activate the alarm.