Car Key Repair - How to Fix a Dead Remote
Car remotes are a wonderful convenience for drivers. They can unlock doors, open trunks, and even start the car. These remotes are prone to malfunction at the most inconvenient of instances.
Before you head to the dealer, you can try a few quick solutions when your key fob stops working. These suggestions could save you money.
Keyless Entry System
Instead of having to fiddle around with keys in your pocket or purse instead, stroll up to your car, hit a button on the key fob, and then open the doors and start the engine. It's an easy feature that makes driving a car more relaxing and secure. The keyless entry system, just like any other device, can be damaged through repeated use or other elements. If you're having problems with yours, you may either visit the dealer or call a locksmith.
The way a keyless entry system functions is by releasing radio signals, and then searching for a corresponding response from the key fob. If the system can recognize the signal, it will trigger to unlock the car doors and activate the computer onboard. Certain systems include another transmitter located in the trunk of the car which opens it when you waggle a foot under it.
Each key fob is given a unique digital identification code by the manufacturer. A unique process of technology known as "programming" is used to set the fob up with a specific car's system. This usually involves turning on the ignition of the vehicle repeatedly in a specific sequence. car key remote repair could include pulling or pushing various buttons and levers or removing fuses.
When a key fob is programmed to your specific vehicle's keyless entry system it transmits its digital identification code along with a function code that instructs the car what to do (lock, unlock, or open the trunk). The receiver in the car verifies that the transmitter is the person it claims to be using an authentication and encryption procedure. If it's authorized, the onboard computer unlocks the vehicle and begins the engine.
A skilled criminal could snoop and use the code sent between the keyfob and the vehicle. This would require the use of an instrument that records the transmission, and then transmits it again in the event that the system doesn't want it to. To prevent this from happening, most keyless entry systems rely on a method called rolling code that guarantees that each new signal from the transmitter received by the vehicle has a different counter than the previous one.
Batteries
The most frequent reason for the car remote key fob not working is an inoperative battery. If you have an extra key fob, it's a low-cost and simple fix. Most fobs are powered with watch-style batteries that can be purchased at hardware stores or big-box stores for less than $10. A quick search on the internet or your vehicle's owner's manual will provide directions on how to take apart your key fob and swap out the battery.
Be cautious not to damage any antennas or circuits in the case once you've removed the battery. They are likely holding the key fob's programming to your car's specific model and tampering with them will make it impossible to program (and most likely not work). If you need to move key fobs, be careful. Certain key fobs could have fasteners which can easily pop out and scatter key fob pieces all over your living space.
Most key fobs have one hole that can be used with a screwdriver or other pry tool to pop open the case, however it's best to wedge your pry tool around the outside of the case first, as if you would peeling an apple or orange. Do not apply too much pressure, as the fob case is often constructed of plastic and could break or crack if you apply too much pressure to it.
Make sure you match the size and style of the battery to your key fob when replacing it. Some key fobs come with two batteries while others need one. The wrong battery could render your remote keyfob useless.
If the problem persists, you can try again with your key fob after installing the new battery. If not then you'll need to figure out whether your key fob is suffering from an issue that is more complex and requires professional diagnosis and repair. You may have to have the fob reset at a dealer or buy a new one.
Buttons
The buttons on your key fob could be tiny however they're packed with electronic components. It's not a surprise that they fail from time-to-time. If your car key button suddenly stops working, you'll be able to generally fix it yourself.
The most frequent reason why a car remote key stops working is because dirt or crud has been lodged between the button. To remove this obstruction remove the batteries and scrub each button with a cotton swab dipped in rubbing alcohol. Make sure to dry them thoroughly before replacing the batteries.
It's possible that your key fob has been damaged in some way, such as being dropped on concrete or accidentally scratched. If this is the situation, you can check your key fob's functionality by using a different one.
Another possibility is that the door lock sensor in your vehicle isn't working anymore. It's a tiny metal component attached to the key fob's door lock button. It's not uncommon for it to break due to weather conditions or long use. Press your key button several times without locking or unlocking your doors. This will reset the sensor.
If all else fails, you could always check the functioning of an extra key by trying to lock and unlock your doors with it. If the spare key does not work, it may be necessary to find an 24 hour locksmith that can offer car key repair to make your remote work again.
If your car key button does work, and it's still not locking or unlocking the vehicle, you may try reprogramming your computer system. However, keep in mind that if you've owned the same key fob for a long time, it's going to need to be programmed every few months to ensure it remains in sync with your vehicle. It's not an ideal situation, but it's better than having to replace your remote completely.