How to Repair a Remote Key
Although most remote key fobs come with an impressive battery life, they do eventually degrade. Some times it is as simple as replacing the batteries inside the device, but in other cases the problem can be more serious.
Take apart the remote and clean the buttons. Then bend them in and out. These techniques may be all you need to get your key fob back in working order.
Battery
Car key remotes are powered by CR2025 or CR2032 batteries, and they can often be swapped out if the fob is still functioning. If not, look at the battery terminals and buttons to see if there are any parts that are loose. You can usually connect the terminals and buttons back in place. However, you will be required to know which type of battery is used in your fob.
If you're not sure if the battery is at fault then use a backup fob to start or unlock your vehicle. If you can, then it's time to replace your primary fob. If it's not, you will need to have a professional examine it to find the problem. It could be as simple as reprogramming it, or require other repairs. You might also discover that your vehicle has lost the fob. This isn't something you can do on your own.
Case
The outer plastic enclosure of a remote is called the case. It usually comes with a replacement button pad. It is essential to choose a new case, as the original will probably be quite dirty and it is crucial that the circuit board is placed correctly inside the case. The circuit board is what determines the function of the key fob. You can test it with an instrument set to RF (radiofrequency) mode, and a radio scanner that is tuned to the same frequency as the key fob.
Check the contact points on the buttons on the keypad. They may have become loose over time, or even broken. A careful soldering process to put them back in place can often return them to full functionality unless they break completely.
Buttons
If the buttons on your key fob aren't working or are difficult to push, you can purchase a new dorman or motormite remote key housing online at the lowest cost for the model/year/make. Then pop the circuit board out of your old case into the new. key car repair may need to adjust the position of your circuit board for certain models. Then, you can use aluminum foil with double sided tape to adhere it to the black contact points on the buttons.
Programming
The key fob is linked with the receiver in your vehicle. This connection can be corrupted. A professional will inspect your vehicle to determine the year, make and model. They'll then use specialist equipment to reconnect or program a blank transponder chip or fob (or clone the key if that is possible). Then they will test the remote to make sure that it works.
It is essential to be cautious when programming the blank key, because the process can be complicated and different brands require distinct steps. It is easy to miss a crucial step or wait too long to exit the programming mode. To minimize the risk of damaging your vehicle it is recommended to work with a professional who has extensive knowledge of the security system of your vehicle. Certain key programming tools can also identify diagnostic trouble codes in your vehicle. This can help you fix or resolve other issues.