If your key fob does not work then you can fix it by following some simple steps. First, ensure that it's not the backup remote.
If your backup remote can unlock and lock the doors of your car, it is likely that the main remote is not working. The most common causes of key problems with your car remote are circuitry or battery issues.
Battery
It is not unusual to find a battery on the car key fob to degrade. It is fairly easy to replace batteries, but it is crucial to make sure that you select the correct one; you can look in the owner's manual or talk to the dealer for the manufacturer to find out what kind of battery you require. It is also crucial to check the battery compartment, since batteries that are not working properly can release caustic chemicals that can harm the remote. If changing the batteries does not solve the problem, it may be that there are other issues that require attention from a professional. For example, if buttons appear stuck or damaged, it may be necessary to disassemble the remote and rework its components. You could also try reprogramming the vehicle to recognize the new device.
Buttons
From repeated use, key fobs could wear out and become dirty. It is not unusual for buttons to stop functioning, or require a hard press to make them work. This can be extremely frustrating especially if you're out of town and need to start your car. Fortunately, even worn-out or damaged buttons can be fixed with a bit of time and some of the materials you have in the home.
First, make sure that the batteries are correctly installed and that the indentation at the back of the button is filled. Take the remote apart and look over the circuit board. Look for signs of corrosion or other indications that the 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 damaged or where conductive paint is missing. Don't rub too hard as this can damage the conductive paint and stop the button from firing when you press it.
Check the battery connector's terminals carefully for any loose solder connections. If this is the case, connecting them back may bring back function to the button. You can apply the same procedure to restore functionality to any other loose connection within the fob.
In the end, if any of the buttons made of rubber on the front of the key fob aren't working or require a very difficult press to function it is likely the graphite disks at the back of the button are wearing down and need to be replaced. car key repairs near me can do this by rubbing a pen across the disks. This will bring the button back to life.
If none of this is helpful, or if the button doesn't respond to a hard push, then it may be the case that the circuit board itself is damaged. This can be fixed by a quick clean and refitting, but it's best to have an extra fob in case this method fails for you.
Circuitry
Whether or not the keys fob buttons are functioning, the circuit board inside the remote could be dirty. This problem can be resolved by a thorough inspection. Broken and damaged cases are the most common causes of boards that are dirty. A damaged case allows water and other debris to get in and short out the electronic components. Water can also eat away at pins and connectors on the board called 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 solder new ones in their place. Also, it's worth checking the connections between the battery terminals. If they're loose, the buttons may not work or even become stuck in their down position. Soldering terminals and buttons back to their original positions is often enough to return a malfunctioning fob back to working.
Non-Remote Transponder Chips
The sealed non-remote chips are more durable than their remote fobs, but they 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 to blame for non-remote chips failures.
If you're not comfortable opening the key fob, you can remove the circuitboard and use a multimeter to verify that the diode is functioning properly. If you're not confident doing this, visit your local hardware store or the Oreilly's and they will usually have a radio frequency tester that can determine whether the key fob sending signals.
Programming
Key fobs take many abuses and aren't indestructible. They can lose their pairing with the receiver inside your vehicle due to shocks or a low battery, requiring reprogramming. A professional auto locksmith, or a dealer in the main, can reprogram your keyfob and get it functioning again. If resetting or replacing your keyfob does not work it is possible to replace it.
