How to Repair a Remote Key
Although most remote key fobs boast an impressive battery lifespan, they eventually wear out. Some times it is simple to replace the batteries inside the device, however sometimes the problem can be more serious.
Take the remote apart and clean the buttons. Then move them out and in. These techniques might be all you need to get your key fob working.
Battery
Car key remotes are powered by CR2025 or CR2032 batteries and can usually be swapped out in the event that the device is functional. If it isn't accessible, you can take it off the fob and examine the batteries' terminals and buttons for any signs of looseness or damaged parts. You should be able to solder the buttons and terminals back in place. However, you will have to know the kind of battery is being used in the fob.
If you're unsure whether the battery is the problem then use a backup fob to unlock or start your vehicle. If you are able to do so, it's time for a replacement of the primary fob. If not, a professional inspection is required to determine why it's not functioning properly. It could be as simple as reset, or it could require other types of repair. You may also find that your vehicle has lost the fob. This isn't something you can fix on your own.
Case Study
The outer plastic housing of a remote is known as the case. It usually comes with an alternative button pad. It is best to use a brand new case, since the original one will likely to be extremely filthy. Also, it is crucial that the circuit board within the case is placed correctly. The circuit board is responsible for controlling 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.
Examine the contact points of the keys on the keypad. They may have become loose over time, or even broken. A careful soldering process to put them back in place will often restore them to full functionality unless they snap off completely.
Buttons
If the buttons on your key fob aren't working or are difficult to push, you can purchase an alternative dorman or Motormite remote key housing online for the lowest cost for your model/year/make. Then, pop the circuit board out of the old case and insert it into the new one. For certain models it may be necessary to move the board slightly. 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 connected with the receiver of your vehicle and this connection can become corrupted. A professional will assess the vehicle to determine the make, year and model and employ specialist equipment to re-pair or program the fob with a blank transponder chip (or make a key replica if this is possible). Then they test the remote to make sure that it works.
It is essential to be careful when reprogramming an unprogrammed key, since the process can be complicated and different manufacturers require slightly different steps. It is also possible to miss a step or take too long to exit the programming mode, which is why it is recommended to work with professionals with extensive knowledge of the security system of your vehicle to minimize the risk of harming the car. key repair car programming tools can also identify diagnostic trouble codes in your vehicle. This will help you solve other issues.