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How to Fix a key repair Fob That isn't Working

If your key fob doesn't work and you're not sure why, you can fix it with some simple steps. First, check to make sure it's not the backup remote.

If your backup remote cannot lock and unlock the doors of your vehicle, it is likely that the primary remote isn't working. The most frequent causes of car remote key failure are issues with the circuitry or battery.

Battery

The battery inside the mobile key repair fob may wear out over time. It is fairly easy to change out a battery, although it is essential to ensure that you choose the correct type; you can look in the owner's manual or talk to the dealer for the manufacturer to find out the kind of battery you need. It is also essential to inspect the battery compartment as dead batteries can leak caustic chemicals that can harm the remote. If changing the batteries doesn't solve the problem it could be that there are other issues that require professional attention. For instance, if buttons seem stuck or broken, it may be necessary to take the remote apart and rework its parts. You can also try reprogramming the vehicle to recognize the new remote.

Buttons

Through frequent use, key fobs may become worn and dirty. This is not unusual, but it can cause buttons to stop working or require a very difficult press to get them to function. This can be a huge hassle particularly if you're out of town and need to start your vehicle. Fortunately, even worn-out or broken buttons can usually be fixed with just a bit of time and some of the materials you have in the home.

First, make sure the batteries are properly charged and that the indentation on the back of the button is filled. Then, open the remote with care and look over the circuit board. Look for signs of corrosion or other indications that the buttons are worn or damaged, like missing the conductive paint. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that has worn-out or where to repair car Key remote conductive painting is missing. Avoid rubbing too hard since this could cause damage to the conductive paint and block the button from firing when it is pressed.

Also, be sure to check the battery connector terminals for any loose solder connections. If this is the case, soldering them back in place could restore function to the button. The same process can be used to restore function to any loose connections in the fob.

In the end, 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 on the back of the button are wearing down and require replacement. You can usually do this by rubbing a pen over the disks. This should bring the button to life.

If none of these solutions work or you cannot get the button to respond when you press it hard, it could be that the circuitry is failing. It is possible to fix this by cleaning and re-soldering the button, but you should have another spare in case it does not work.

Circuitry

Whether or not the key fob buttons are working, the circuit board inside your remote may be dirty. A thorough inspection will usually resolve this issue. The most frequent causes of dirty circuit boards are water and broken cases. A broken case can allow water and other debris to enter the circuit board, which can cause it to short out. Water can also eat away at pins and small connectors on the board, which are known as via's.

If you are handy enough to open your key fob, and you don't mind making some mess, we can remove the buttons from their sockets and then solder new ones. Also, you should check the connections between the battery terminals. If they are loose, the buttons could not function or get stuck in their down position. Soldering the terminals back to their proper positions is usually enough to return a malfunctioning fob to a working condition.

Non-Remote Transponder Chips

Sealed non-remote transponder chips are much more durable than the remote fobs that contain them however they are still susceptible to being cracked by a hole made in them or pushed over by a lawnmowers blade or car door handle. Fuse failures are usually the cause of non-remote chip failures.

If you're not comfortable opening the key fob, you can remove the circuitboard and use a multimeter to determine if the diode is working correctly. If you're not comfortable with this, go to your local Oreilly or hardware store and utilize their RF frequency tester. This will let you know whether the key fob sends an RF signal.

Programming

Key fobs endure lots of abuse and aren't completely indestructible. They may lose their connection with the receiver inside your vehicle because of shocks or a low battery, which calls for the reprogramming. A professional auto locksmith or main dealer will be able to reprogram your key fob to get it functioning again. If resetting or repairing your keyfob does not work, you may need to replace it.