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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain an transponder chip that transmits an alert to your car to open the doors and start the engine. However, the fob could not function due to a variety of reasons. The most commonly cited reason for key fob failure is the battery of the coin is dead. Other causes include water damage or a malfunctioning module and interference signals. Dead Coin Battery Replace the battery if your key fob has died. Choose a new button battery that is identical in size, voltage and specifications as the old one. If the key fob was exposed to water, for example a splash of rain or salt water on the beach, it needs to be cleaned before it is able to be used again. The best solution is to use a paper towel soaked with isopropyl or an electronic cleaner. If the key fob has not been exposed to water, but isn't working, there may be an issue with the receiver module or an internal electronic chip. In these situations, reprogramming the key fob using an OBDII scanner may aid. Water Damage If your key fob has taken a bath in the puddle or pool or even a trip down the wash machine, you could be suffering some water damage. It is usually possible to get it working by getting rid of the batteries and cleaning the circuit board using rubbing alcohol. It's best to let the fob dry completely prior to installing a new battery. If your key fob stopped working, even after replacing the battery and reprogramming it, you may have a faulty receiver module. You can find information on reprograming the majority of remote keys on YouTube, or consult your owner's manual. You can also reset the computer in your car with the OBDII scanner tool. Faulty Receiver Module The key fob has an electronic chip that communicates with the vehicle's system. If the chip is damaged, it will be unable to longer be able to send or receive signals to the vehicle. A key fob falling off can cause this, as can water exposure. If your key fob stopped working due to exposure to water and you are unable to fix it if clean the chip with electronic cleaner or isopropylethanol. However, if the key fob does not respond even after cleaning it then it is likely that the module is defective and will require to be replaced. A malfunctioning receiver could cause the key to not work. This is usually due to electromagnetic interference. Faulty Electronic Chip The electronic chip in your key fob is an essential component of the anti-theft system in your vehicle. It sends a signal to the immobiliser unit inside your vehicle to tell it whether the key is valid. Your car won't start if the chip is damaged. A defective chip could be caused by interference from other objects, bad weather or transmitters close to your vehicle. In this instance you'll need a new key fob. Contacts to the battery are not working properly. The battery contacts on a key fob are very delicate and can get damaged by repeated use. If they're bent, or damaged, the fob will not send any signals to the receiver modules inside the vehicle. Modern fobs come with rubber seals that keep out water. A splash of water or a light rain should be fine but submerging them into saltwater can harm the electronic chip. The key fob has chips that communicate with the vehicle's immobilizer to allow it to begin it. The system utilizes the old red keys for older vehicles as well as the cryptocoding system that is used in newer cars. If spare fiat 500 key TheKeyLab is damaged, it will need to be replaced. Problematic 12 Volt Battery A malfunctioning battery could cause the key fob to function. If this happens, the car's computer system cannot recognize that the remote is inside the vehicle. Before replacing the battery, test it using a the voltmeter to determine its capacity. A fully charged battery will display 12.6 volts. If the reading falls significantly, it's time to replace it. To test the battery's power, place an electrical load on it for a couple of minutes. This will take away approximately 1% of the surface charge. After that, take the voltage again. The higher the capacity of the battery and the longer it can keep its voltage. Ideal is that it stays at or near 12 volts for several minutes. The radio signal is not working properly. Radio Signal This is the main reason for a key fob that stops sending signals to the car. The battery is able to be replaced to resolve this issue. But, it is essential to select a replacement battery that has the same size and voltage as the original one. Fobs aren't impervious to damage and are susceptible to damage. Contacts and buttons on batteries can be damaged by rough handling. A signal may also be interrupted by other transmitters or objects who use the same frequency. A light-control panel in your home, for instance, may interfere with key fobs that use the same bandwidth. This could cause interference with the remote control of your car. Incorrect OBDII scan tool There are many reasons why a scan tool could not function. Some are more complex than others. Professional scan tools enable mechanics to observe the car's network, and run various self-tests. These can be real time-savers, but they can be expensive, out of the budget of many DIYers. If your OBD2 scanner won't turn on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition it's likely that a fuse has failed. This is the main reason for a scan tool to fail. The easiest fix is to replace the fuse that has been blown.