Our remote wouldn't unlock car so we used the key, however, it set the alarm off. We couldn't get alarm to shut off and car wouldn't start. Remote would not lock or unlock doors or shut off alarm. Solution: put key in ignition and turn to ACC push the unlock button on remote while key is in the ignition......then turn off get out lock and unlock the door using remote....it worked for us Good Luck!
With alarm activated your ignition is disabled.Find the combination to disable it.With GM's you hold opposing buttons on the fob till it beeps twice. The dealer should help for no charge.
SOURCE: 01 tiburon, alarm reset? wont start
I had the same problem because I store my car in the garage in the winter. I found that replacing the positive/negative cables with new ones and also if you still have your spare key, try putting one key in the ignition and turn to acc before turning it over click your alarm button on your spare set of keys and the alarm should reset itself and the car should start. i hope this helps you, i just finished changing my spark plug wires because I had a code P302 which made my 2nd cylinder misfire, so if your tiburon is around 180,000 km then you should change it too, I recommend Bosch they are the best.
take care
Sven
SOURCE: Ny 2004 tiburon factory alarm is stuck on, cannot
hi try disconnecting the battery+ for two mins then re connect this sometimes works please rate this answer thanks hope this helps
SOURCE: I changed the car battery
Have you tried using key to lock and unlock drivers door, or passenger door ? Works on some vehicles not 100% sure on that one.
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