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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder which transmits an electronic signal from the fob to the car to open doors or start the motor. However, the fob could be inoperable due to various reasons. The most commonly cited reason for key fob malfunction 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 in case your key fob has died. Choose a new button battery that has exactly the same size, voltage, and specification as the original. If the key fob was exposed to water (such as saltwater or rain at the beach) it should be cleaned before being used again. The best way to do this is using the paper towel and soak it in isopropyl or electronic cleaner. If the key fob is not 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 cases you can reprogramme the key fob with an OBDII scanner could assist. Water Damage If your key fob has gotten a bath in the puddle or pool or walked through the washing machine, it could have some water damage. It's possible to fix it by taking out the batteries and cleaning the circuit board using rubbing alcohol. It is a good idea to let the fob dry completely before installing a new battery. If your key fob has stopped working, even after replacing the battery and changing the program, you could have a problem with the receiver module. You can find instructions for reprogramming most vehicles' remote keys on YouTube, or consult the owner's manual. You can also reset the computer in your car with the OBDII scanner tool. Faulty Receiver Module The key fob contains the chip that communicates the vehicle's system. If the chip is damaged, it can no longer transmit and receive signals to the vehicle. A key fob falling off can cause this, as could water exposure. If the key fob stops working after exposure to water, it is possible to fix the issue by cleaning the chip using isopropyl alcohol or an electronic cleaner. If the key fob doesn't respond to cleaning, it is possible that the module has issues and needs to be replaced. A defective receiver module could also cause the remote control key to stop functioning. This is often caused by electromagnetic interference. Faulty Electronic Chip The chip that is embedded in your key fob is a vital component of the anti-theft system in your car. It sends a message to the immobiliser inside your car to inform it if the key is valid. Your car will not start if the chip is damaged. A malfunctioning chip can be caused by interference from other objects, bad weather or transmitters close to your vehicle. In this instance it is likely that a new fob would be needed. read this article with the battery may be damaged. The battery contacts in a key fob are very 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 are designed with rubber seals in order to keep out water. A splash of water or light rain is acceptable however, submerging them in saltwater can damage the electronic chip. The key fob houses chips that communicate with the vehicle's immobilizer to allow it to start it. The system uses the old red keys that were used in older vehicles, or the cryptocoding system used in newer cars. If the chip is not working properly it will have to be replaced. Problematic 12 Volt Battery A malfunctioning battery could cause the key fob to function. The car's computer may not recognize the remote when this occurs. Before you replace the battery, test it with an voltmeter to gauge its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly, it's time to replace it. Install an electrical charge for a short time on the battery to test its capacity. This will take off about 1% of the charge on the surface. Then, you can measure the voltage once more. The better the battery's capacity, the longer it can keep its voltage. The ideal is to keep it close to 12 volts during several minutes. Radio Signal Faulty 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 problem. It is important to buy batteries that have the same dimensions and voltage as the original. Fobs can take a lot abuse, but they're not impervious to destruction. The battery buttons and the contacts are fragile and are susceptible to being bent or damaged from rough use. Other transmitters or objects using the same frequency can interfere with the signal. A light control panel in your home, for instance can interfere with key fobs that use the same frequency. This could interfere with the remote control of your car. Incorrect OBDII Scan Tool There are many reasons a scanner tool may not work. Some are more complicated than others. Professional scan tools enable mechanics to monitor the car's networks and run various self-tests. These are real time savers but they're also expensive, out of the budget of most DIYers. If your OBD2 scanner won't turn on, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are OK, it's likely that a fuse has been blown. This is among the most common causes of a scan tool failing. The simple fix is usually to replace the fuse that is blowing up.