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Hyundai Accent Keyless entry failiure - entry without alarm?

My 2004 Hyundai Accent keyless entry stopped working. I changed the battery and the light now signals it is operating but it still won't open the car. If i use the key to open the door the alarm will go off and won't stop until I press the button on the key chain (which isn't working). How do I get into my car without the alarm going off, or only going off for a short period?

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  • Rick Byrd
    Rick Byrd May 11, 2010

    check the room lamp fuse ( 10 amps) located under the hood in fuse box , left side of engine compartment , in front of shock tower .thats the only source of power to the anti-theft module , its a long shot , but worth a try,, i don't like the flow chart diagnostics , "if the remote lights up when you press a button and doors don't unlock replace transmitter" , i don't like that at all ...

    J5

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  • 1,990 Answers

You might try Opening the Door and Opening the Hood and Disconnecting the Battery. This should reset the System. If this is the Factory Keyless Entry, There is a Relay and a Fuse for this. Check them and see if they are Bad or Blown.

Posted on Jan 24, 2009

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This bulletin supersedes TSB# 02-90-001.
DESCRIPTION: The security system keyless adapter cable (SPX/Kent-Moore P/N 09900-21300) is a special service tool (SST) that is used for programming new keyless entry remote transmitters to the factory security systems. The keyless adapter is used in conjunction with the Hi-Scan Pro (with Hi-Scan SOL Pro Software Version 09-29-03
or newer) and Data Link Connector (DLC) Cable. SERVICE INFORMATION: The keyless adapter cable can be used on the following vehicles:
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  • 2001 - 2004 MY XG300/350 0390020a.gif
NOTE
  • The 2003 - 2004 MY Tiburon does not need the Keyless Adapter Cable to add keyless entry remotes to the factory security system. Instead, the Hi-Scan Pro connects to the vehicle using only the DLC cable. See page BE-60 in the 2004 MY Tiburon Shop Manual for the latest instructions.
  • The most current Keyless Adapter Cable Instructions are available in the following shop manuals:
SHOP MANUAL

PAGES

2004 MY Elantra
BE-73 - BE-74
2004 MY Santa Fe
BE-43 - BE-44
2004 MY Sonata
BE-40 - BE-41
2004 MY XG350
BE-46 - BE-47
KEYLESS ADAPTER CABLE INSTRUCTIONS:
  1. Connect the keyless adapter cable to the Hi-Scan Pro DLC cable. 0390020b.gif
  2. Plug the keyless adapter into the vehicle's 10-pin multi-purpose connector located behind the driver's side lower instrument panel (next to the DLC). NOTE Sample vehicle shown is the Santa Fe.
    0390020c.gif
  3. Turn the Hi-Scan Pro ON
    and press ENTER
    . NOTE "Release date 29. Sep. 2003" OR LATER
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    0390020d.gif
  4. Select option "HYUNDAI VEHICLE DIAGNOSIS"
    and press ENTER
    . 0390020e.gif
  5. Select vehicle model and press ENTER
    . 0390020f.gif
  6. Select option "TRANSMITTER CODE SAVING"
    and press ENTER
    . 0390020g.gif
  7. Ensure that the key has been removed from the ignition cylinder before proceeding. 0390020h.gif
  8. Follow the steps noted on the Hi-Scan Pro screen to program the remote(s). NOTE The factory security system can only be programmed to accept two remote transmitters and MUST be programmed for both remote transmitters at the same time.
    0390020i.gif
  9. Press ESC
    on the Hi-Scan Pro and verify that the remote(s) are functioning properly.
  10. Turn the Hi-Scan Pro OFF
    and disconnect the adapter cable from the multi-purpose connector.

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