• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

How to Fix a Key Fob That isn't Working

If your key fob does not work and you're not sure why, you can fix it by following some simple steps. First, make sure that it's not the backup remote.

If your backup remote is unable to lock and unlock the doors of your car, it is likely that the primary remote is not working. Most problems with car remote key repair remote keys result from battery or circuitry problems.

Battery

The battery in the key fob could be worn out over time. It is fairly easy to change out batteries, but it is crucial to make sure that you use the right type that you can refer to the owner's manual or talk to the dealer for the manufacturer to find out what kind of battery you require. It is recommended to inspect the battery compartment with care, as dead batteries sometimes leak harmful chemicals that can damage the remote. If changing the battery doesn't fix the issue there may be additional issues that require attention from a professional. For instance, if buttons seem stuck or broken, it may be necessary to take the remote key repair apart and rebuild its components. You can also try reprogramming the vehicle to recognize the new fob.

Buttons

Key fobs can become dirty and worn out from repeated use. It is not common for buttons to cease working, or to require a hard press to make them work. This can be very frustrating particularly when you're away from home and need to turn on your car. Even worn-out or malfunctioning buttons can be fixed with a bit of time and the tools you already have at home.

First, check that the batteries are properly installed and that the indentation on the back of the button has been filled. Then, carefully open the remote and examine the circuit board. Check for evidence of rust, or other indications that the buttons have been worn or damaged. For instance there could be conductive paint missing. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that has worn out or has conductive paint missing. Avoid rubbing too hard as this can erode the conductive paint and block the button from firing when it is pressed.

Also, be sure to check the battery connector terminals for an unattached solder connection. If this is the case, soldering them back in place can restore functionality to the button. The same procedure can be used to restore functionality to any other loose connections inside the fob.

Finally, if any of the buttons made of rubber on the front of the key fob have stopped working or require a difficult press to function it is likely that the graphite disks at the back of the button are wearing down and require replacement. This is usually done by rubbing a pencil on the disks, which should bring the button back to life.

If all of this doesn't help, or if the button does not respond to a hard press It could be that the circuit board has gone bad. It is possible to fix this issue by cleaning and re-soldering the fob, but you should have a spare in case it doesn't work.

Circuitry

Whether or not the keys fob buttons are functioning, the circuit board inside your remote might be dirty. This issue can be fixed through a thorough examination. The most common causes of dirty circuit boards are water and broken cases. A damaged case can allow water and other debris to pass through and short out the electronics. Water can also destroy pins and connectors that are small on the board, referred to as via's.

If you're handy enough to remove your key fob and aren't afraid of a little mess, we can de-solder the buttons and then solder new ones in their place. It's also worth looking at the battery terminal connections. They can become extremely dirty and if they're loose, the buttons might not function or even stay in their down position. Soldering the terminals and button's back in their place is generally all it takes to restore keys that are not in working condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chip are more durable than remote fobs that contain them but they can still be cracked by a hole made in them or pushed over by a lawnmowers or door handle for a repair car keys. Failures of the fuse are typically to blame for non-remote chip failures.

If you're not comfortable opening the key fob, remove the circuitboard and use a multimeter to check that the diode is operating correctly. If you're not comfortable doing this, go to your local hardware store or Oreilly's and they usually have an radio frequency tester that can determine whether the key fob sending a signal.

Programming

Key fobs endure lots of abuse and aren't indestructible. They may lose their connection to the car's receiver due to shock or a low battery, requiring the reprogramming. A professional auto locksmith or the main dealer can reprogram your keyfob to get it working again. In the rarer case that resetting or repairing your key fob doesn't work it may be time to replace it all over again.