Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends a signal from the fob to the car that allows it to unlock doors or turn on the motor. The fob could stop working for a variety. A dead battery for the coin is the most common reason for a key fob malfunction. Other causes include water damage an inoperative receiver module and signal interference. Dead Coin Battery If your key fob's battery has died, the first thing to do is replace it. Make use of a new button battery with the same voltage, size and specification as the original. If the key fob was exposed to water (such as rain or saltwater at the beach) it must be cleaned before being used again. The trick is to use a paper towel that has been soaked in isopropyl or an electronic cleaner. If the key fob is not working despite not being exposed water it could be due to a problem in the receiver module or an internal electronic chip. In these instances it is possible that reprogramming the key fob using an OBDII scanner might assist. Water Damage You might have water damage if your key fob was submerged in a puddle, pool or washing machine. It is usually possible to get it working by taking out the batteries and cleaning the circuit board using rubbing alcohol. It is recommended to let the circuit board completely dry prior to installing batteries. It could be that you have a defective module in the event that your key fob stops working after replacing the battery or replacing it with. 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 in your car with the OBDII scanner tool. Faulty Receiver Module The key fob has a chip that connects to the car's system. This chip will stop sending and receiving signals to the car if it becomes damaged. This can be caused by dropping the key fob or by exposure to water. If the key fob is not working after water exposure it may be possible to repair it by cleaning the chip with isopropyl alcohol, or electronic cleaner. However, if the key fob still does not respond after cleaning it it is likely that the module is faulty and will require to be replaced. A damaged receiver can cause the key to cease to function. This usually happens due to electromagnetic interference. Electronic chip that is malfunctioning The chip that is embedded in your key fob is a vital component of the anti-theft systems in your car. It transmits a message to the immobiliser in your car to determine that the key is valid. If the chip is damaged or damaged, your car will not start. A malfunctioning chip can be caused by interference from other objects, weather conditions or transmitters near your vehicle. In this scenario you'll require a new key fob. Contacts to the battery are not working properly. The battery contacts of a key fob can be damaged through heavy use. If they're bent, or broken, the fob won't transmit any signals to receiver modules in the vehicle. Modern fobs come with rubber seals that keep out water. A splash of water or a light rain is fine, but submerging them in salt water could damage the chip's electronic components. The key fob contains an embedded chip that communicates to the immobilizer system of the vehicle, allowing it to start it. This system utilizes cryptocoding systems in newer vehicles and the older red key system for older models. This chip will have to be changed if it is malfunctioning. Faulty 12 Volt Battery A faulty battery can cause the key fob to stop working. When this happens the car's computer will not be able to recognize that the remote is inside the vehicle. Test the battery with a voltmeter before replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly then it's time to replace it. To test the battery's capacity, place an electrical load on it for a couple of minutes. This will eliminate about 1 percent of the surface charge. After that, measure the voltage. The longer a battery can hold its voltage and the higher its capacity. Ideally, it should remain at 12 volts or less for several minutes. Problems with Radio Signal This is the main cause of a key fob that stops sending signals to the car. The issue can be fixed by replacing the battery. However, it is important to choose a battery that is the same size and voltage as the original one. Fobs are subject to a lot of abuse, but they're also not indestructible. The battery contacts and buttons could be damaged by rough handling. A signal can also be disrupted by other objects or transmitters that use the same frequency. For instance, a light control panel that is near your home could send interference over the same bandwidth that key fobs utilize. https://www.thekeylab.co.uk/fiat-car-keys/ could interfere with your car's remote control. Afflicted OBDII Scan Tool There are many reasons scanners don't work. Some are more complicated than others. Professional scan tools permit mechanics to examine the car's systems and conduct a variety self-tests. These are real time-savers, but they can be expensive, out of the range of most DIYers. If your OBD2 scan tool isn't turning on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they are all OK the fuse could have ruptured. 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.