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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder that sends an electronic signal from the fob to the car that allows it to unlock doors or start the motor. However, the fob may stop working for several reasons. The most common cause of key fob failure is a dead coin battery. Other causes are water damage or a damaged module and interference signals. Dead Coin Battery Replace the battery if your key fob has gone out of service. Make use of a button cell battery with the same voltage, size and specifications 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 using again. fiat keys replacement is to use an old towel soaked in isopropyl, or electronic cleaner. If the key fob has not been exposed to water, but remains inoperable it could be because of a problem with the receiver module or an internal electronic chip. In these cases it is possible that reprogramming the key fob using an OBDII scanner can help. Water Damage If your key fob has taken submerged in a puddle or pool or walked down the washing machine, it could have some water damage. It's possible to get it back in working order by taking out the batteries and cleaning the circuit board with rubbing alcohol. It is a good idea to allow the fob to dry completely prior to installing a new battery. You could have a damaged module if your key fob stops working after replacing the battery or updating. You can find information on reprograming the majority of remote keys on YouTube or consult the owner's manual. You could also try resetting the car's onboard computer using the OBDII scan tool. Faulty Receiver Module The key fob contains an electronic chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if damaged. This could be due to dropping the key fob or by water exposure. If your key fob isn't working due to exposure to water, you may be able fix the issue if you clean the chip using electronic cleaner or isopropylethanol. If the key fob continues to not respond even after cleaning it then it is likely that the module is faulty and will require to be replaced. A faulty receiver module can also cause the remote control key to not function. This is typically caused by electromagnetic interference. A malfunctioning electronic chip The electronic chip in your key fob plays a crucial function in the anti-theft security system of your car. It sends a signal to the immobiliser unit inside your car to inform it whether the key is genuine. If the chip is damaged or broken, your vehicle will not start. A faulty chip may also be caused by interference from other objects, bad weather or transmitters in the vicinity of your vehicle. In this situation you'll need a new key fob. Contacts for the battery that are defective The battery contacts on the fob's battery can be damaged through heavy use. If they are bent, or broken, the fob won't transmit any signals to receiver modules inside the vehicle. Modern fobs feature rubber seals that block out water. Submerging them in water, even if just a light drizzle or splash, can damage the chip's electronic components. The key fob has an electronic chip that communicates with the vehicle's immobilizer to allow it to allow it to start. This system utilizes cryptocoding systems in the latest vehicles, or the old red key system used in older ones. This chip needs to be replaced if defective. Poor 12 Volt Battery A malfunctioning battery could cause the key fob to cease to function. The car's computer won't 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 will display 12.6 volts. If the reading decreases significantly then it's time to replace it. To test a battery's capacity put an electrical load on it for a few minutes. This will remove 1percent of the surface charges. Then, measure the voltage again. The greater the battery's capacity is, the longer it will maintain its voltage. It is ideal to maintain close to 12 volts over several minutes. Radio Signal Faulty Radio Signal This is the main reason for the key fob to stop sending signals to vehicles. The battery is able to be replaced to resolve this problem. But, it is essential to purchase a battery that has the same voltage and size as the original one. Fobs endure a lot of abuse, and they aren't indestructible. Battery contacts and buttons can be damaged through rough handling. Other objects or transmitters using the same frequency can also disrupt the signal. For instance, a light-control panel close to your home can send interference over the same bandwidth that key fobs use. This could affect the remote control of your car. Afflicted OBDII scan tool There are a variety of reasons why scanner tools may not work. Some are more complex than others. Professional scan tools let a mechanic observe the car's networks and run various self-tests. These tools can save a lot of time, but are costly and not accessible to most DIYers. If your OBD2 scan tool won't power on, check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they're all fine the fuse could have ruptured. This is one of the most common causes of scan tool failure. It is typically easy to fix the issue by replacing the fuse that has blown.