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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder which transmits a signal from the fob to the car in order to unlock doors or turn on the motor. However, the fob may stop working due to a variety of causes. A dead coin battery is the most common cause of the malfunction of a key fob. Other causes include water damage as well as a defective module and interference signals. Dead Coin Battery Replace the battery if your key fob has gone out of service. Make use of a new button battery that has the same voltage, size and specification as the previous one. If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned before being used again. A paper towel soaked in alcohol or electronic cleaner can be the solution. If the key fob doesn't working even though it is not exposed to water, it could be due to a malfunction in the receiver module, or even in the internal electronic chip. In these instances, reprogramming the key fob using an OBDII scanner could help. Water Damage If your key fob's battery has taken submerged in a pool or puddle or even a trip through the washing machine, you might have some water damage. It's possible to get it back in working order by getting rid of the batteries and cleaning the circuit board using rubbing alcohol. It's a good idea to let the fob dry completely before putting in 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. There are reprogramming guidelines for most remote key fobs on YouTube or in your owner's guide. You could also try resetting the car's onboard computer with the OBDII scan tool. Faulty Receiver Module The key fob's chip is the chip that communicates with the car's system. If the chip is damaged, it will no longer transmit or receive signals to the vehicle. The key fob being dropped can result in this, as can water exposure. If your key fob stopped working due to exposure to water or water exposure, you might be able to fix it by attempting to clean the chip with electronic cleaner or isopropylethanol. If the key fob doesn't respond to cleaning, it's possible that the module has an issue and should be replaced. A damaged receiver can cause the key to cease to function. This is usually 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 car. It transmits a message the immobiliser inside your car to tell it that the key is valid. If the chip is damaged or broken, the car won't start. A malfunctioning chip could be caused by interference signals from other objects, bad weather conditions or transmitters on the same frequency close to your car. In this scenario the replacement fob will be needed. fiat key programming contacts The battery contacts on the key fob are delicate and could be damaged by repeated use. If they are bent, or damaged, the fob will not send any signals to receiver modules inside the vehicle. Modern fobs have rubber seals that keep out water. Immersing them in water, even if it's just a light drizzle or splash could damage the chip's electronic circuit. The key fob has chip that communicates with the immobilizer system of the vehicle, allowing it to start it. This system makes use of cryptocoding systems in vehicles that are more modern, or the old red key system used in older models. This chip will need to be replaced if defective. Poor 12 Volt Battery A defective battery can cause the key fob to stop working. When this happens the car's computer won't recognize that the remote is inside the vehicle. Test the battery with an voltmeter prior to replacing it to determine its capacity. A fully charged battery will display 12.6 volts. If the reading falls significantly, it's time to replace it. Install an electrical charge for a short period of time on the battery to test its capacity. This will take away approximately 1% of the charge on the surface. After that, take the voltage again. The longer the battery is able to hold its voltage more effectively, the greater its capacity. Ideal is to hold close to 12 volts over several minutes. Faulty Radio Signal This is the most frequent reason for a key fob that ceases to send signals to the car. The issue can be fixed by replacing the battery. It is essential to purchase batteries that have the same dimensions and voltage as the original. Fobs are subject to a lot of abuse, but they're not indestructible. Battery contacts and buttons can be damaged by rough handling. Other objects or transmitters using the same frequency can also disrupt the signal. A light control panel in your home, for example can interfere with key fobs that have the same frequency. This could affect your car's remote control. Afflicted OBDII scan tool There are many reasons a scanner tool may not perform. Some are more complex than others. Professional scan tools enable mechanics to monitor the car's network and run a range of self-tests. These are real time-savers, but they can also be very expensive and are out of the budget of most DIYers. If your OBD2 scan tool won't power on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're all fine the fuse could have blown. This is the most typical reason for failures of the scanner. It is typically simple to fix the issue by replacing the fuse blowing up.