Notes

Solutions To Problems With Remote Key Repair
How to Fix a Key Fob That isn't Working

If your key fob won't work and you're not sure why, you can fix it by following just a few steps. First, make sure that it's not your backup remote.

If the backup remote is able to lock and unlock your car doors then there's a likely issue with the primary remote. Most car remote key failures are caused by battery or circuitry problems.

Battery

The battery in a key fob can wear out over time. It is fairly easy to replace batteries, but it is essential to make sure that you select the correct one and you can consult your owner's manual, or contact the manufacturer's dealer to determine the type of battery you require. It is also important to examine the battery compartment, since dead batteries can leak toxic chemicals that could damage the remote. If replacing the batteries doesn't solve the problem it could be because there are other issues that require attention by a professional. For example, if buttons seem to be stuck or broken It may be necessary to disassemble the remote and rebuild its components. You can also try reprogramming the vehicle to recognize the new fob.

Buttons

Key fobs can get dirty and worn out from frequent use. This is not uncommon however, it can cause buttons to cease functioning or require a difficult press to get them to function. This can be a hassle particularly when you're away from your home and you need to start your car. Even broken or damaged buttons can be fixed with a bit of time and the tools you already have at home.

First, ensure that the batteries are up correctly and that the indentation on the back of the button is filled. Take the remote apart and look over the circuit board. Look for indications of rust or other indications that the buttons have been damaged or worn out. For instance, conductive paint may be missing. Use a Q-tip, dipped in alcohol to gently clean any membrane contact that has worn-out or has conductive paint missing. Do not rub too vigorously in order to damage the conductive paint and prevent the button from firing when pressed.

Examine the battery connector's terminals carefully for any loose solder connections. Soldering them back to their original position can restore the button's functionality If this is the situation. You can use the same method to restore functionality to any other loose connection within the fob.

If any of the rubber buttons on the front of the keyfob isn't working or require being pressed very hard the graphite disks on the back of the button might have worn out and will require replacement. It is usually done by rubbing a pen across the disks. This should bring the button back to life.

If none of this is helpful or if the button doesn't respond to a hard push It could be the case that the circuit board is damaged. This can sometimes be repaired by a quick clean and re-soldering, but it is best to have an extra fob in case this method does not work for you.

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If the key fob buttons function, 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 is water and broken cases. A damaged case can allow water and other debris to enter and short circuit the electronics. Water can also destroy pins and connectors on the board, referred to as via's.

If you're handy enough to remove your key fob, and you're not afraid of making a mess, we can take off the buttons and put new ones in their place. Also, you should check the connections between battery terminals. They can become very dirty and if they're loose the buttons may not work or may even remain in their down position. Soldering the terminals and button's back in place is usually all that's needed to return a non-working key fob to functioning condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are much more durable than remote fobs that contain them however they are still susceptible to being cracked by a hole made in them or pushed 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 are not comfortable opening the key fob, you may take the circuit board off and use a multimeter to verify that the diode is operating correctly. If you're not comfortable with this, visit your local Oreilly or hardware store and use their RF frequency tester. This will let you know whether the key fob sends signals.

Programming

Key fobs are subject to a lot of abuse and aren't impervious to damage. They may lose their connection to the car's receiver due to shock or a low battery, which calls for them to be reprogrammed. A professional auto locksmith or dealer can reprogram your key fob to get it back up and running. If resetting or fixing your key fob fails it is possible to replace it.


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