Hello all,

I'm glad to have found such a knowledgeable resource for Hyundai owners. I hope I can find some answers to this problem that started earlier tonight...

The situation:

I left my dome lights on overnight (Thursday night) which, I believe, ultimately killed my battery. When I attempted to start the car, I realized my mistake and automatically commenced "jump start" procedures (get friend to help move car, find cables, etc). As soon as said friend connected the cables to my battery (after already being attached to his), the alarm siren started going off wildly. I had full power inside the cabin (dash lights, dome, etc), but got no response when I turned the key to the "ON" position. No clicking, no cranking, nothing.

I had Roadside Assistance come out, praying they would have send a guy who knew something I didn't about starting it up, but he experienced the same phenomenon. He used a charger box.

Also, when the driver-side door is closed all the way, the alarm will sound until the door is opened.

What can cause this? Does the theft deterrent system disable the starter/other component? Any other ideas????

Thank you in advance for the help!!

If you set the alarm with the key fob before the battery went dead, I think you need to DISABLE the alarm with the key fob as well. Even if you didn't set it with the key fob, you may need to use it to reset everything because who knows what happened when the juice ran down.

If it's anything simple like that, it could be that you have a problem with your ETACM, the module that controls the alarm. If you connected the cables backwards at any point, it could have damaged it.

I'm almost certain I did enable the alarm with the fob before it went dead. I've tried to turn it off using the fob, but I get no response from the vehicle when I hit the disable/unlock button.

Any other ideas how to disable the alarm?

If you're still under warranty, call Roadside Assistance.

I pointed out before that Roadside Assistance couldn't figure it out. My next step was to have the vehicle towed to a local dealership.

The service department wasn't open, but i was hoping a dealer knew what was going on... sure enough, one guy had been through this before.

Like Doohickie said about the battery dying when the alarm is armed, you must reset/disarm the alarm. Here's how you do it if the car doesn't respond to the fob:

1) Connect power source to your dead battery (charger box or another battery), the alarm will be going off loudly and very obscenely.
2) Turn the key to the ON position and simply listen to the alarm go and go and go....then it will stop after about 30-45 seconds. AFTER IT STOPS, leave the key in the on position for another 30-45 seconds.
3) After the key being in the ON position in silence for 30-45 seconds, turn the key all the way to the left, then crank it all the way into the ignition position.

Worked fine after all this.

Thanks for your help.