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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain an transponder chip that transmits the signal to your vehicle to open the doors and start the engine. The fob may stop working for a variety of reasons. A dead coin battery is the most frequent cause of a key fob malfunction. Other causes include water damage an inoperative receiver module, and signal interference. Dead Coin Battery Replace the battery if the key fob has failed. Choose a button battery that has the same voltage, size and specifications as your 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 will be the solution. If the key fob isn't working despite not being exposed to water it could be due to a malfunction in the receiver module or internal electronic chip. In these cases it is possible to re-programme the key fob with an OBDII scanner may help. Water Damage There could be water damage to your key fob if it was submerged in a puddle, pool or washing machine. It is usually possible to get it working again by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It's best to let the fob dry completely prior to installing a new battery. If your key fob has stopped working, even after replacing the battery and changing the program, you could have a defective receiver module. There are instructions for reprograming the majority of remote keys on YouTube or refer to the owner's manual. You can also reset your computer of your car using the OBDII scanner tool. Faulty Receiver Module The key fob has a chip which communicates with the vehicle's system. If the chip is damaged, it will be unable to longer transmit and receive signals to the vehicle. This can be caused by dropping the key fob, or through exposure to water. If the key fob is not working after exposure to water, it is possible to fix the issue by cleaning the chip with isopropyl alcohol or electronic cleaner. If the key fob does not respond to cleaning, it's possible that the module has an issue and must be replaced. fiat doblo key can also cause the remote control key to stop functioning. This is usually due to electromagnetic interference. Faulty Electronic Chip The electronic chip inside your key fob plays an important part in the anti-theft security system of your car. It transmits a signal to the immobiliser unit of the vehicle to determine whether or not the key is genuine. If the chip is damaged or damaged, your car will not start. A malfunctioning chip can be caused by interference from objects, bad weather or transmitters located near your vehicle. In this instance you'll require a new key fob. Contacts for the battery that are damaged The battery contacts on a key fob are very delicate and may be damaged by repeated use. If they are bent, or broken, the fob won't send any signals to the receiver modules inside the vehicle. Modern fobs come with rubber seals that block out water. In the event of submerging them in water, even if it is just an occasional drizzle or splash can harm the chip's electronic components. The key fob contains an electronic chip that communicates with the vehicle's immobilizer system to start it. The system relies on cryptocoding systems in modern vehicles as well as the traditional red key system in older models. This chip needs to be replaced if faulty. A faulty 12 Volt battery A malfunctioning battery could cause the key fob to cease working. When this occurs the car's computer will not recognize that the remote is in the vehicle. Test the battery with the help of a voltmeter to determine its capacity. A fully charged battery will display 12.6 volts. If the reading decreases significantly the time is now to replace it. Install an electrical charge for a short period of time on the battery to check its capacity. This will take away 1percent of the surface charges. After that, take the voltage again. The longer a battery can keep its voltage steady and the higher its capacity. The ideal is to keep it close to 12 volts over several minutes. Radio Signal Faulty Radio Signal This is the most frequent reason for the key fob not sending signals to a car. The battery is able to be replaced to resolve this problem. However, it is crucial to purchase a battery that is the same voltage and size as the original one. Fobs are subject to a lot of punishment, and aren't indestructible. The battery buttons and contacts are delicate, so they can get bent or damaged by excessive use. Other transmitters or objects that use the same frequency can also disrupt the signal. A light-control panel at your home, for example could interfere with key fobs that use the same bandwidth. This can interfere with the remote control of your car. Incorrect OBDII Scan Tool There are many reasons why a scan tool may not work. Certain are more complicated than others. Professional scan tools allow mechanics to examine the car's systems and run a range of self-tests. These tools can help save time, but they are costly and not accessible to the majority of DIYers. If your OBD2 scan tool isn't turning on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If these are OK, it's likely that a fuse has blown. 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.