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How to Fix a Key Fob That isn't Working

If your key fob won't work then you can fix it with a few simple steps. First, make sure that it's not your backup remote.

If your backup remote is unable to lock and unlock the doors of your car, it is likely that the main remote is not working. The majority of car remote key malfunctions are caused by circuitry or battery issues.

Battery

The battery in the key fob could get worn out over the course of time. It is relatively easy to change out the battery, however it is crucial to ensure that you choose the correct type that you can refer to your owner's manual, or contact the manufacturer's dealer to find out what kind of battery you need. It's also a good idea to examine the battery compartment carefully because dead batteries can release caustic chemicals that could cause damage to the remote. If changing the batteries doesn't solve the issue, it may be that there are other issues that require professional attention. If buttons are broken or stuck, for example it might be necessary to remove the remote and rebuild each component. You could also try reprogramming the vehicle to recognize the new fob.

Buttons

Key fobs can get dirty and worn out from repeated use. This is not atypical however it can cause buttons to cease functioning or require a hard press for them to function. This can be a hassle particularly when you're away from home and need to start your car. Fortunately, even worn-out or damaged buttons can be fixed with a little time and a few materials you may already have around the house.

First, make sure the batteries are properly charged and that the indentation on the back of the button is filled. Then, carefully remove the remote and examine the circuit board. Look for signs of corrosion or other signs that buttons are worn out or damaged, such as missing conductive paint. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that has become damaged or where conductive paint is missing. Be car key fob repairs near me not to rub too hard, because this could damage the conductive paint and stop the button from firing when the button is pressed.

Also, make sure to inspect the battery connector's terminals for any loose solder connections. Soldering them back to their original position will restore the button's functionality if this is the situation. You can use the same procedure to restore functionality to any other loose connection inside the fob.

If any of the rubber buttons on the front of the keyfob are not working or need to be press extremely hard, the graphite disks at the back of the button may have worn out and will require replacement. You can do this by rubbing a pen across the disks. This should bring the button to life.

If none of this is helpful, or if the button still does not respond to a hard press It could be the case that the circuit board itself has become damaged. It is possible to fix this by a quick clean, and re-soldering, but it is recommended to have an additional fob in case this method does not work for you.

Circuitry

The circuit board in your remote control could be dirty, regardless of whether the buttons on the key fob work or not. This issue can be fixed through a thorough examination. Broken and damaged cases are the most common causes of dirty boards. A damaged case can allow water and other debris to get in and short circuit the electronics. Water can also damage pins and vias, which are the tiny connectors on the board.

If you're able to open your key fob, and you're not afraid of a little mess, we can remove the solder from the buttons and solder new ones in their place. It's also worth checking the battery terminal connections. If they're loose, the buttons may not work or even become stuck in their down position. Soldering the terminals and button's back in place is usually all it takes to restore a non-working key fob to working order.

Non-Remote transponder chips

Sealed non-remote transponder chips are more durable than the remote fobs they are contained in, but they can still be broken by a hole being drilled into them or run over by a lawnmower or door handle for a car. The failure of the fuse is usually the cause of non-remote chip failures.


If you're not comfortable opening the key fob, take the circuit board off and use a multimeter to verify that the diode is functioning properly. If you're not sure with this, you can visit your local Oreilly or hardware store and utilize their RF frequency tester. This will tell you whether the key fob is sending signals.

Programming

Key fobs take many abuses and aren't completely indestructible. They may lose their connection to the receiver in your car because of shock or a low battery, which calls for the reprogramming. A professional auto locksmith or main dealer, can reprogram your keyfob to get it functioning again. In the event that resetting or repairing your key fob fails it could be the time to replace it all over again.

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Pub: 18 Jun 2024 06:51 UTC
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