Watch Out: How Fiat 500 Keys Is Taking Over And What Can We Do About It
fiat punto key fob replacement are equipped with a transponder which transmits a signal from the fob to the car that allows it to unlock doors or turn on the motor. The fob could stop working due to a variety of reasons.
A dead battery for the coin is the most common cause of the malfunction of a key fob. Other causes include water damages or a malfunctioning module and interference signals.
Dead Coin Battery
Replace the battery if the key fob has gone out of service. Choose a new button battery with identical in size, voltage and specification as the original.
If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it's going to need to be cleaned before it is able to be used again. The best solution is to use a paper towel soaked with isopropyl or electronic cleaner.
If the key fob has not been exposed to water, but isn't working it could be because of an issue with the receiver module or an internal electronic chip. In these instances, reprogramming the key fob with an OBDII scanner could aid.
Water Damage
You might have water damage if your key fob was submerged in a puddle, pool or washing machine. It's usually possible to get it back to working by taking the battery off and cleaning the circuit board with isopropyl alcohol. It is recommended to let the board completely dry prior to installing a battery.
If your key fob has stopped working, even after replacing the battery and changing the program, you could have a defective receiver module. You can find instructions for changing the programming of most remote keys on YouTube, or consult your owner's manual. You could also try resetting the car's onboard computer by using the OBDII scan tool.
Faulty Receiver Module
The key fob is equipped with the chip that communicates with the vehicle's system. If the chip is damaged, it will be unable to longer transmit or receive signals to the vehicle. The key fob being dropped can cause this, as can water exposure. If the key fob is not working after exposure to water it may be possible to fix it by cleaning the chip using isopropyl alcohol, or electronic cleaner.
If the key fob won't respond to cleaning, it is possible that the module has an issue and should be replaced. A defective receiver module could also cause the remote control key to stop functioning. This is usually caused by electromagnetic interference.
Faulty Electronic Chip
The electronic chip inside the key fob is a vital component of the anti-theft system in your vehicle. It sends a message to the immobiliser inside your car to determine whether the key is genuine. If the chip is damaged or broken, your car will not start.
A defective chip could be caused by interference from objects, bad weather or transmitters in the vicinity of your vehicle. In this instance you'll need a new key fob.
Contacts for the battery that are defective
The battery contacts inside the key fob are fragile and are susceptible to damage by repeated use. If they're broken or bent, the fob won't send any signals to the receiver modules in the car.
Modern fobs come with rubber seals that keep out water. In the event of submerging them in water, even if it's only an occasional drizzle or splash could damage the chip's electronic components.
The key fob contains the chip that connects to the vehicle's immobilizer to allow it to allow it to start. The system is based on the old red keys in older vehicles, or the cryptocoding system used in modern vehicles. This chip will need to be replaced if it's malfunctioning.
Problematic 12 Volt Battery
A defective battery can cause the remote to cease working. The car's computer will not recognize the remote if this occurs.
Before replacing the battery, test it by using a a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading drops significantly, it's time to replace it.
Install an electrical charge for a short period of time on the battery to gauge its capacity. This will remove about 1 percent of the surface charge. After that, take the voltage once more. The longer a battery can keep its voltage steady and the higher its capacity. Ideally, it should remain close to 12 volts several minutes.
The radio signal is not working properly. Radio Signal
This is the most typical reason behind a key fob that ceases to send signals to the car. This problem can be solved by replacing the battery. However, it is crucial to choose a battery with the same size and voltage as the original.
Fobs aren't indestructible and can take a lot. The battery contacts and buttons are delicate, so they can get bent or broken by rough usage.
A signal may also be affected by other objects or transmitters who use the same frequency. A light-control system in your home, for example could interfere with key fobs using the same bandwidth. This could cause interference with the remote control of your car.
Faulty OBDII scan tool
There are a variety of reasons why scanners don't function. Some are more complex than others.
Professional scan tools let mechanics to monitor the car's network and perform various self-tests. These tools can save you a lot of time, but they are costly and are out of reach for the majority of DIYers.
If your OBD2 scanner won't turn on Check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If they are all OK it could be that a fuse has failed. This is one of the most common causes of failures in the scan tool. The easiest solution is to replace the blown fuse.