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2005 Hyundai Sonata alarm goes off when car doors locked.

I have 2005 Hyundai Sonata with pre-installed alarm system from new (factory installed). Sometimes when I get out and lock the car doors with key, alarm goes off. Sometimes I unlock and lock the car with keys and the alarm does not come on. Other times it does not work and then I open the door and shut it and then lick then it works sometimes not.

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6 Suggested Answers

ghost4548
  • 776 Answers

SOURCE: My alarm on my 2002 Hyundai Sonata keeps going off

Experience with this problem points to several possible causes. First, hood switch is improperly adjusted or rubber button on the underside of the hood which strikes this switch is missing or worn out (does the 'answer back' feature (horn toot) occur when you press the "lock" button on the keyless remote twice?). If it doesn't, this is the first place to look -- is the hood bent out of shape? Often I have found the hood adjustment is SO CLOSE to the hood switch being 'CLOSED', that a simple gust of WIND can set off the alarm.
Next, each door and the trunk have switches which must be in their proper positions (closed -- Open Circuit communication with the ETACS module) for the burglar alarm to SET Active/ON. The problem could be at any one of these switches, not to mention the ETACS module itself. Best solution:Take/tow the vehicle into a Hyundai Service Center (dealership), pay the diagnostic fee. They will tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.).

Posted on Jun 06, 2009

tbirdfan1
  • 3051 Answers

SOURCE: key fob will not lock or unlock doors on 06 Sonata

Hi there
i have the same problem but mine is the sensor that is under the dash that is faulty so i had them disable it untill i can get a part that they need to order so i would have your dealer check the sensor .. if it is under warranty they will replace it for free

Posted on Mar 08, 2009

ghost45
  • 1280 Answers

SOURCE: how to get the alarm to go off with the remote

by pressing the 'door UNLOCK' button

Posted on Oct 03, 2009

ghost45
  • 1280 Answers

SOURCE: Need color codes for 2005 hyundai sonata stereo

Here's the wiring diagram


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Posted on Oct 25, 2009

  • 10 Answers

SOURCE: disarm alarm on a 2004 sonata

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.

Posted on Dec 22, 2009

  • 1 Answer

SOURCE: Alarm Issues

I have been having this same issue for the past 6 months. So far no one can give me an answer that solves the problem. I have done several things unsuccessfully 1) changed the battery (still happens) 2) flipped the valet toggle switch under the steering column (still happens) 3) I lock the doors using the automatic lock button on the driver and/or passenger door (the alarm will not self-activate and go off, but this still doesn't solve the root problem with the alarm)

Posted on May 25, 2010

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How do you get a 2004 hyundai sonata to start after new battery was installed causing the alarm to keep going off.


have you tried locking and unlocking the car with the remote. How about locking and unlocking the drivers front door with the key?

Oct 02, 2015 | Hyundai Motor 2004 Sonata

1 Answer

HOW PROGRAM THE KEY LESS ENTRY FOR SONATA 2012


  1. Cars
  2. Car Maintenance
  3. General Car Maintenance
  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
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.
(Kleophaus Livingston/Demand Media) Sponsored Links
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

Mar 29, 2015 | Hyundai Sonata Cars & Trucks

2 Answers

My 2004 Hyundai accent's alarm goes off randomly some time after the car is locked


The alarm system has a sensitivity control and it needs to be turned down. This cannot be a factory alarm system?

Jun 21, 2012 | Hyundai Motor 2004 Accent

2 Answers

I have a 2003 hyundai sonata and i dont have the remote for the stock alarm. My alarm keeps going off and my car wont start. I bought a new battery and even tried the key in the door still no luck.....


The 2003 Sonata is equipped with a 'starter KILL' burglar alarm system with disables the starting system (using a N/C 'contacts' configuration instead of a N/O contacts configuration). N/C=Normally closed, and N/O=Normally open contacts. When the alarm goes off with a MY Sonata, the only way to DISARM it is with the key fob (remote) originally programmed for it (unless you purchase a new remote & have it programmed for the vehicle at an authorized Hyundai Service Department). NOTE: So long as the keyless entry & burglar alarm system is functioning/operating normally, the alarm will keep going off and the STARTER KILL function will still prevent you from starting the vehicle. One option is left without purchasing a new remote and having it programmed.
1. When the alarm goes off, get into the vehicle and insert the ignition key into the ignition.
2. Turn the key to the 'RUN' position (NOT the ACC position) and wait for the alarm to STOP (usually about 3 to 5 minutes).
3. The engine should then start using the ignition key.

If this procedure doesn't work, the problem will need further diagnosis by a qualified/certified Hyundai Service Technician.

Hope this helps

Aug 27, 2011 | 2003 Hyundai Sonata

1 Answer

How to shut the alarm on 2005 Hyundai sonata


no valet switch,you will have to replace batteries/keypad to make it work and you CANNOT bypass the system......otherwise whats the point in fitting it??

Jun 26, 2010 | 2005 Hyundai Sonata

1 Answer

Alarm module fried 2002 Hyundai Sonata


Why did you fry the Alarm System?... Everything you described is controlled by the ETACS module.

91b2a46.jpg adf7aba.jpg fb8f850.jpg Replace the module


Jun 05, 2009 | Hyundai Motor 2002 Sonata

1 Answer

Alarm Issues


I have been having this same issue for the past 6 months. So far no one can give me an answer that solves the problem. I have done several things unsuccessfully 1) changed the battery (still happens) 2) flipped the valet toggle switch under the steering column (still happens) 3) I lock the doors using the automatic lock button on the driver and/or passenger door (the alarm will not self-activate and go off, but this still doesn't solve the root problem with the alarm)

Mar 28, 2009 | 2005 Hyundai Sonata

2 Answers

Disarm alarm on a 2004 sonata


welcome to the modern world. If you forget to arm it, it does it by itself.

Its part of immobilizing, to prevent car theft which costs us all

Sep 10, 2008 | Hyundai Motor 2004 Sonata

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