How to Fix a Key Fob That isn't Working
If your key fob isn't functioning, a few easy steps can fix it. The first step is to be sure it's not the backup remote.
If your backup remote is unable to lock and unlock the doors of your vehicle, it is likely that the main remote is not working. The most common causes for car remote key failure are battery or circuitry issues.
Battery
The battery in the key fob may be worn out over time. It is quite simple to replace batteries, but it is crucial to ensure you use the right type that you can refer to your owner's manual or contact the dealer of the manufacturer to determine the type of battery you need. It is also a good idea to inspect the battery compartment carefully because dead batteries can leak caustic chemicals that can cause damage to the remote. If replacing car key fob repair doesn't solve the issue, it may be that there are other issues that require attention by a professional. If the buttons are stuck or broken, for example, it may be necessary take the remote apart and rework each component. It is also possible to reprogramme the vehicle to recognize the new fob.
Buttons
Through repeated use, key fobs can get dirty and worn. This is not unusual however it can cause buttons to stop working or require a difficult press to get them to work. This can be very frustrating particularly when you're away from your home and need to start your car. Fortunately, even worn out or malfunctioning buttons can often be fixed with just a bit of time and a few items you may already have around 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 inspect the circuit board. Check for signs of corrosion or other indications that the buttons are worn or damaged, like missing conductive paint. Then, using the Q-tip, dipped in rubbing alcohol, gently clean any membrane contacts that have damaged or have conductive paint missing. Avoid rubbing too hard, as this can erode the conductive paint and block the button from firing when it is the button is pressed.
Also, make sure to inspect the battery connector's terminals to ensure a loose solder connection. If this is the case, soldering them back in place may restore function to the button. The same method can be used to restore functionality to any other loose connections within the fob.
If any of the rubber buttons at the front of the keyfob isn't functioning or require to be press extremely hard the graphite disks at the back of the button may have worn out and need to replaced. It is usually done by rubbing a pen across the disks. This should bring the button to life.
If none of these solutions work, or if you still are unable to get the button to respond when pressed hard, it could be that the circuitry is failing. It is possible to fix this by a quick clean, and refitting, but it's recommended to have an additional fob on hand in the event that this method does not work for you.
Circuitry
If the keys fob buttons are functioning the circuit board in the remote could be dirty. This problem can be resolved through a thorough examination. The most common causes for dirty circuit boards are water and broken cases. A broken case allows water and other debris to get in and short out the electronics. Water can also eat away at pins and connectors that are small on the board, which are known as via's.
If you're handy enough to remove your key fob and don't mind a little mess, we can remove the solder from the buttons and then solder new ones in their place. Also, you should check the connections between the battery terminals. If they are loose, the buttons could not work or even become stuck in their down position. Soldering the terminals back to their original positions is often enough to return a malfunctioning fob to a working condition.
Non-Remote Transponder Chips
The non-remote chips sealed in a sealed case are more durable than their remote fobs. However, visit this weblink are susceptible to breaking in the event of a hole being drilled in them, or if a car door handle or lawnmowers is pushed over them. Failures of the fuse are typically the cause of non-remote chip failures.
If you're not confident opening the key fob, take the circuit board off and use a multimeter to check that the diode is working correctly. If you don't feel comfortable with this, visit your local Oreilly or hardware store and use their RF frequency tester. This will tell you whether the key fob transmits a signal.
Programming
Key fobs aren't indestructible and can be damaged by a variety of factors. They can break their connection with the receiver in your vehicle because of shocks or a low battery, which calls for the reprogramming. A professional auto locksmith or main dealer can reprogram the keyfob and get it functioning again. If resetting or fixing your keyfob does not work it may be necessary to replace it.