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 make sure that it's not the backup remote.

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

Battery

The battery inside the key fob could get worn out over the course of time. It is simple to replace a battery. However it is essential to select the right type. You can refer to your owner's guide or contact the manufacturer to find out the correct type. It is also important to examine the battery compartment as dead batteries can leak caustic chemicals which can damage the remote. If changing the battery doesn't fix the issue, there may be other issues that require professional attention. For instance, if buttons appear stuck or damaged it could be necessary to disassemble the remote and rebuild its components. You could also try reprogramming the vehicle to recognize the new fob.

Buttons

Key fobs can become filthy and worn out due to frequent use. This is not unusual however it can cause buttons to stop functioning or require a long press to function. This can be very frustrating, especially when you are away from home and you need to switch on your car. Even malfunctioning or worn-out buttons can be fixed with a bit of time and the tools you already have at home.

First, check that the batteries are charged correctly and that the indentation on the back of the button is filled. Open the remote carefully and inspect the circuit board. Check for evidence of rust, or other indications that the buttons have been worn or damaged. For example, conductive paint may be missing. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that has worn-out or where conductive paint is missing. Do not rub too vigorously as this can damage the conductive paint, and block the button from firing when you press it.

Check the battery connector's terminals for loose solder connections. Soldering them back to their original position can restore the button's functionality in the event that this is the case. You can use the same process to restore functionality to any other loose connection within the fob.

If any of the rubber buttons located at the front of the keyfob isn't working or need to be press extremely hard, the graphite disks at the back of the button might have worn out and require replacement. This can be done by rubbing a pencil on the disks, which should bring the button back to working.

If all of this doesn't help or if the button does not respond to a firm press, then it may be that the circuit board is damaged. It is possible to fix this by cleaning and re-soldering your fob, but you should have an extra in case it does not work.

Circuitry

If the keys fob buttons are functioning the circuit board that is inside your remote might be dirty. A thorough examination is often enough to resolve this issue. Broken and damaged cases are the most frequent causes of dirty boards. A damaged case could allow water and other debris into the circuit board, causing it to short. Water can also damage pins and vias, which are the tiny connectors found on the board.

If you're able to remove your key fob and aren't afraid of a little mess, we can take off the buttons and solder new ones in their place. Also, you should check the connections between the battery terminals. If they're loose, the buttons could not work or even become stuck in their down position. Soldering the terminals back into place is usually enough to bring a non-working fob back to working.

Non-Remote transponder chips

The non-remote chips sealed in a sealed case are more durable than remote fobs, however they are susceptible to breaking if a hole is drilled into them or when a door handle for a car or lawnmowers plows over them. The failure of the fuse is usually the cause of non-remote chip failures.

If you're able to open the sealed key fob and are willing to put up with the mess, you can easily remove the circuit board and check the fuse using a multimeter for proper diode function. If you're not confident doing this, head to your local hardware store or Oreilly's, and they'll usually have a RFID frequency tester that can tell you whether the key fob repair fob sending a signal.

Programming

Key fobs take lots of abuse and aren't completely indestructible. They can lose their pairing with the receiver inside your vehicle due to shocks or low battery, requiring changing the program. A professional auto locksmith or main dealer, can reprogram your keyfob and get it up and running again. If, in the unlikely event that resetting and fixing your key fob fails, it could be time to replace it completely.

좋아요 0