How to Repair a Remote Key
While most remote key fobs come with impressive battery lives they will eventually wear out. Sometimes it's as simple as replacing the batteries in the device, however sometimes the problem can be more serious.
Take apart the remote and clean the buttons. Then bend them in and out. These methods could be all you need to get your key fob to work.
Battery
Car key remotes are powered by CR2025 or CR2032 batteries, and they can often be replaced when the fob is functioning. If not, you can inspect the battery terminals or buttons to determine if there are any parts that are loose. It is usually possible to solder the buttons and terminals back in place. However, you will have to know the type of battery is installed in the fob.
If you're not sure if the battery is the issue, try using a backup key fob and see whether you can unlock or start your car using it. If it's possible then it's time to replace your primary fob. If it's not, a professional inspection is needed to figure out why it's not working properly. It could be as simple as reprogramming it, or require other repairs. You may also find that your car has lost the fob. Look At This isn't something you can tackle by yourself.
Case Study
The outer plastic enclosure of a remote is referred to as the case. It usually comes with an alternative button pad. It is crucial to get a new case, as the original one is likely to be quite dirty and it is vital that the circuit board is set properly in the case. The circuit board controls the key fob's function. You can test it by using a multimeter set to RF (radiofrequency) mode and a radio scanner that is tuned to the same frequency as the key fob.
Another thing to examine is the button contact points on the keypad. They may have become damaged or loose in the course of time. By carefully re-soldering them back into place will often restore the functionality of the keypad unless they completely snap off.
Buttons
If the buttons on your key fob no longer work or are difficult to press for any reason, a motormite or dorman key housing replacement for your remote can be bought inexpensively online for your year/make and model. Then, simply pop the circuit board out of your old case into the new. In some cases it may be necessary to adjust the position of the board slightly. The black contact points of the buttons can be bonded to with aluminum foil and double-sided tape.
Programming
The key fob is paired with the receiver inside your vehicle. This connection could be damaged. A professional will examine the car to determine the manufacturer, year model, year and model. They will use specialist equipment to re-pair or program a blank fob or transponder chip (or clone a key if this is possible). Then, they test the remote to be sure it works.
When reprogramming blank keys, it is important to take care. The process can be complicated and each manufacturer offers distinct instructions. It is easy to miss a crucial step or wait too long to exit the programming mode. To reduce the chance of damaging your car, it is best to employ a professional who has vast knowledge of the security system in your vehicle. Certain programming tools that are essential to use can also detect diagnostic trouble codes on your vehicle. This can help you fix or resolve other issues.