I Have a 2006 Hyundai Tucson which, when I lock the doors using the key fab, sounds the horn alarm approximately 10 minutes later. When I remove the battery from the key fab and lock the doors manually, it's fine. I have tried installing a new battery into the key fab ( thinking this may be the low battery warning alarm) no success. Can you help?

To arm content theft alarm.
1. Open the door.
2. Lock the door with the power door lock switch or
the remote keyless entry transmitter. The
SECURITY light should flash.
3. Close all doors. The SECURITY light should go off
after approximately 30 seconds. The alarm is not
armed until the SECURITY light goes off.

If a locked door is opened without the key or the remote keyless entry transmitter, the alarm will go off. The headlamps and parking lamps will flash for two minutes, and the horn will sound for 30 seconds, then will turn off to save the battery power.

thats normal when you use your key fob to open door it resets the alarm --when you use your key alone to unlock you have a few seconds to place key into ignition and turn on to turn off and reset alarm --the vehicle initially thinks the door was slimjimed

I would return it to the installer

My 2012 Hyundai Elantra Wont Start - CarGurus

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CarGurusJul 30, 2013 - My 2012 hyundai Elantra GLS would not start this morning. ... I hit my door unlock on mt Key fab and the doors unlocked fromt here I proceeded start my car.... it and it wont turn over just makes a light click. not like a battery issue. .... But if Istart from the zero position on the starter it doesn't start on the first try ...

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Mar 30, 2014 - 16 posts - ‎8 authors
I do not know what could have caused this but when i lock my car... ... lock yourdoors with your key fob(might have to hit the lock button twice) ... The alarm/horn should start beeping. ... 2010 Hyundai Genesis Coupe 2.0T R-spec in Karussel White.... My lights flash when I lock it, but the horn doesn't sound.

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make sure all doors are really closed and the door sensors are not falsely telling the alarm module that its open. if not then its the shock sensor in the alarm module acting up

lock driver door then passenger door with the key wait 5 mins then unlock the driver door with key and then passenger door with key but don't open the doors when you first unlock it then after all doors un lock then hold foot on brake then insert key turn it to on position while holding brake down
then release brake then compress brake 3 times and then turn the key to off position. this should reset the security system for you

Okay try locking the door with the key and then unlocking it, this should sut down the alarm if it doesnt then try the pass/side door lock with key, the switch on the drivers door lock may be bad, also i'm not sure if this is a factory alarm or not. hope this helps.

Sounds like the acutator that pushes and pulls. either lost power or died. I would assumed died. U need to check to see if it is on a seperate fuse first, it may be. If the fuse is ok, remove the hatch inside plastic panel and arm and disarm the alarm. See if the actuator moves.

YOUR WIRELESS CONTROL MODULE(SENTRY KEY MODULE)MAY BE ELECTRICALLY LOCKED UP..THERE IS A SERVICE BULLETIN FROM CHRYSLER..YOU CAN REMOVE IOD FUSE IN FUSEBLOCK(UNDERHOOD BEHIND AIR CLEANER..IGNITION OFF DRAW(IOD)THIS WILL RESET WIRELESS CONTROL MODULE AND VEHICLE SHOULD START AND LOCKS RESPOND AGAIN..IF IT DOES,THE WCM WILL HAVE TO BE REPLACED AND THIS NEEDS TO BE DONE BY DEALER

have they always been that way?

these setting can be changed with a Hy-Scan at any hyundai dealersip.