How to Fix a Key Fob That isn't Working

If your key fob isn't functioning There are a few simple steps that can be taken to fix it. First, make sure that it's not the backup remote.

If your backup remote can lock and unlock the doors of your car, it is likely that the primary remote isn't working. The majority of car remote key malfunctions result from circuitry or battery issues.

Battery

The battery in the key fob could wear out over time. It is simple to replace the battery. However, it is important to select the right kind. You can refer to your owner's guide or contact the manufacturer to determine the right type. It is also crucial to examine the battery compartment, as batteries that are not working properly can release caustic chemicals which can damage the remote. If changing the batteries does not solve the problem it could be because there are other issues that require attention by a professional. If buttons are broken or keyless entry repairs stuck, for example, it may be necessary disassemble the remote and rework each component. You can also try reprogramming the vehicle to recognize the new key fob.

Buttons

Key fobs can become dirty and worn-out from frequent use. This is not atypical however it can cause buttons to stop working or require a hard press for them to work. This can be very frustrating especially when you're away from home and need to start your car. Even broken or damaged buttons are often fixable with a little time and tools you already have at home.

First, verify that the batteries are correctly installed and that the indentation on the back of the button has been filled. Then, carefully open up the remote and inspect the circuit board. Check for signs of corrosion or other indications that the buttons are worn out or keyless entry Repairs damaged, such as missing the conductive paint. Use a Q-tip, dipped in rubbing alcohol to gently clean any membrane contact that is worn out or has conductive paint missing. Do not rub too vigorously, as this could erode the conductive paint, and block the button from firing when you press it.

Examine the battery connector's terminals for loose solder connections. Soldering them back to their original position will restore the button's functionality if this is the case. You can follow the same method to restore functionality to any other loose connection inside the fob.

In the end, if any of the rubber buttons on the front of the key fob have stopped working or require a hard press to work, it is likely that the graphite disks at the back of the button are wearing down and require replacement. You can usually do this by rubbing a pencil over the disks. This should bring the button to life.

If all of this doesn't help, or if the button still doesn't respond to a firm press, then it may be the case that the circuit board itself has become damaged. It is possible to fix this issue by cleaning and re-soldering the fob however, you should have a spare in case it doesn't work.

Circuitry

If the key fob buttons are working, the circuit board inside the remote could be dirty. A thorough examination is usually enough to fix this issue. Water and broken cases are the most common causes of dirty boards. A broken case can let water and other debris into the circuit board, which can cause it to short out. Water can also eat away at pins and small connectors on the board, referred to as via's.

If you're skilled enough to open your key fob and you don't mind making some mess, we can take the buttons out of their sockets and solder in new ones. It's also worth examining the battery terminal connections. They can become very filthy and if they're not tight enough, the buttons might not function or may even remain 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 order.

Non-remote key fob repair transponder chips

Sealed non-remote transponder chip are more durable than remote fobs that have them but they can be broken by a hole being that is drilled into them or over by a lawnmowers blade or door handle for a car. Fuse failures are usually to blame for non-remote chip failures.

If you're able to remove a key fob that is sealed and are willing to put up with the mess, you can easily remove the circuit board and check the fuse using a multimeter to ensure that it is functioning as intended. function. If you're not comfortable doing this, visit your local hardware store or Oreilly's and they will usually have an radio frequency tester that can determine whether the key fob is transmitting a signal.

Programming

Key fobs take many abuses and aren't completely indestructible. They can lose their pairing with the receiver inside your vehicle because of shocks or a low-battery, which requires the reprogramming. A professional auto locksmith or a main dealer will be able to reprogram your key fob to get it back up and running. If resetting or fixing your keyfob does not work it is possible to replace it.