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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends an electronic signal from the fob to the car to unlock doors or turn on the motor. However, the fob could stop working due to a variety of causes. The most common reason for key fob failure is a dead coin battery. Other reasons include water damage, the receiver module is defective, and signal interference. Dead Coin Battery If your key fob battery has failed, the initial step is to replace it. Use a button cell with the same voltage, size and specifications as the previous one. If the key fob was exposed to water (such as rain or saltwater at the beach) it should be cleaned before being used again. The trick is to use a paper towel soaked with isopropyl or electronic cleaner. If the key fob hasn't 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 situations it is possible to re-programme the key fob with an OBDII scanner might assist. Water Damage You could have water damage to your key fob if it was submerged in a puddle, pool or washing machine. It's possible to get it working by taking the batteries off and cleaning the circuit board with ruby alcohol. It's a good idea allow the fob to dry completely before installing a new battery. It could be that you have a defective module in the event that your key fob stops working after replacing the battery or updating. You can find reprogramming procedures for the majority of vehicles' remote key fobs on YouTube or in the owner's guide. You could also try resetting the car's onboard computer by using the OBDII scan tool. Faulty Receiver Module The key fob has the chip that communicates with the car's system. If the chip is damaged, it can no longer be able to send or receive signals to the vehicle. This could be due to dropping the key fob, or through exposure to water. If your key fob isn't working due to water exposure or water exposure, you might be able fix the issue if you clean the chip with electronic cleaner or isopropylethanol. If the key fob is still unable to not respond even after cleaning it you can be sure that the module is defective and must be replaced. A defective receiver can cause the key to not work. This usually happens due to electromagnetic interference. A malfunctioning electronic chip The electronic chip that is in your key fob plays a vital part in the anti-theft security system of your vehicle. It sends a signal to the immobiliser inside your car that tells it whether the key is legitimate. Your car won't start in the event that the chip has been damaged. A malfunctioning chip could be caused by interference signals from objects or weather conditions that are bad, or transmitters on the same frequency close to your vehicle. In this scenario an upgrade to the fob will be required. Faulty battery contacts The battery contacts on a key fob are very delicate and could be damaged through repeated use. If they're bent or damaged, the fob will not send any signals to receiver modules inside the vehicle. Modern fobs are constructed with rubber seals in order to keep out water. Submerging them in water, even if it is just small splash or drizzle could damage the chip's electronic circuit. fiat key fob replacement contains an electronic chip that communicates with the vehicle's immobilizer system in order to start it. The system uses the old red keys that were used in older vehicles as well as the cryptocoding system that is used in the latest vehicles. This chip will have to be replaced if it's faulty. Problems with 12 Volt Batteries A defective battery can cause the key fob to work. When this happens the car's computer won't recognize that the remote is within the vehicle. Test the battery with an voltmeter prior to replacing it to determine its capacity. A fully charged battery will read 12.6 volts. If the reading drops significantly, it's time to replace it. Put an electrical load for a few seconds on the battery to test its capacity. This will take away 1percent of the charges. Then, test the voltage again. The greater the battery's capacity, the longer it can keep its voltage. The ideal is to keep it close to 12 volts during several minutes. The radio signal is not working properly. Radio Signal This is the main 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 important to purchase a battery that has the same size and voltage as the original. Fobs aren't impervious to damage and can take a lot. The battery buttons and the contacts are fragile which means they could be bent or broken with rough usage. Other transmitters or objects operating on the same frequency can disrupt the signal. A light-control panel in your home, for instance can interfere with key fobs which use the same frequency. This can interfere with the remote control of your car. Faulty OBDII Scan Tool There are many reasons why a scanner could not work. Some are more complex than others. Professional scan tools enable mechanics to observe the car's network and run various self-tests. These tools can save a lot of time, but they're expensive and out of reach for the majority of DIYers. If your OBD2 scan tool fails to turn on, make sure you check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they are all OK, a fuse may have ruptured. This is the most frequent reason for failure of the scan tool. It is generally simple to fix the issue by replacing the blown fuse.