How to Repair a Remote Key
Although most remote key fobs have excellent battery life, they will eventually wear out. Some times it is as simple as changing the batteries inside the device, but in other cases the issue could be more severe.
Take the remote apart and clean the buttons. Then, flex them in and out. These methods could be all you need to get your key fob working.
Battery
Car key remotes utilize CR2025 or CR2032 batteries and can usually be swapped out if the fob is still functional. If not then you can remove the fob and examine the buttons and battery terminals to look for signs of wear or damaged parts. The terminals and buttons can be re-soldered back into place but you'll need be aware of the exact kind of battery is used by your fob.
If you're unsure if the battery is the problem you can make use of a backup fob to unlock or start your car. If you are able to do so, it's time to replace your primary fob. If it's not require replacement, you'll require a professional to examine it to find the issue. It could be as simple as reprogramming it, or require different types of repairs. There's also the possibility that your vehicle forgotten your fob, which isn't something you can fix yourself.
Case Study
The case of a remote key is the outer plastic housing and usually comes with the button pad replacement. It is essential to choose a new case, as the original case is likely to be quite dirty and it is vital that the circuit board is placed properly in the case. The circuit board is responsible for controlling the function of the key fob. You can test it by using 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 could be loose over time, or even broken. Soldering them back into place can often restore them to their original functionality, unless they snap completely.
Buttons
If the buttons on your key fob aren't working or are difficult to press, you can buy a new dorman or motormite remote key housing online at an affordable cost for your model/year/make. Then, pop the circuit board from your old case and put it into the new one. You may need to adjust the position of the circuit board on certain models. Then, you can use aluminum foil and double-sided tape to adhere to the black contact points on the buttons.
Programming
The key fob is paired with the receiver inside your vehicle. This connection can be corrupted. A professional will inspect the car to determine the manufacturer, year model, year and model. remote key repair will employ specialist equipment to re-pair or program a blank fob or transponder chip (or make a key replica if this is possible). Then they test the remote to make sure it functions.
It is essential to be cautious when programming the blank key, because the process can be complicated and different manufacturers have slightly different steps. It is also easy to skip a step or take too long to exit the programming mode, therefore it is recommended to hire professionals with extensive knowledge of your car's security system to avoid damaging your car. Some key programming tools can also detect diagnostic trouble codes on your vehicle. This will help you fix or resolve other issues.