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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip that sends a signal to your car to open the doors or start the engine. The fob might stop working for a variety of reasons. The most common reason for key fob malfunction is a dead coin battery. Other causes include water damage, malfunctioning receiver modules, and signal interference. Dead Coin Battery Replace the battery if your key fob is dead. Use a button cell with the same voltage, size, and specification as your old one. If the key fob has been exposed to water, like a splash of rain or salt water at the beach, it needs to be cleaned before it can be used again. The best solution is to use an old towel soaked in isopropyl or an electronic cleaner. If the key fob isn't working despite being not exposed to water, it could be due a malfunction in the receiver module or internal electronic chip. In these cases, reprogramming the key fob using an OBDII scanner can help. Water Damage You might have water damage if your key fob was submerged in a pool, puddle or washing machine. It's generally possible to get it back in working order by getting rid of the batteries and cleaning the circuit board using ruby alcohol. It is best to let the circuit board completely dry before installing a battery. You could have a damaged module when your key fob ceases working after replacing the battery or changing the programming. You can find information on changing the programming of most remote keys on YouTube, or consult your owner's manual. You can also reset the computer of your vehicle using the OBDII scanner tool. Faulty Receiver Module The key fob contains a chip which communicates with the vehicle's system. If the chip is damaged, it can no longer transmit or receive signals to the vehicle. Dropping the key fob could cause this, as can water exposure. If the key fob stops working after exposure to water it could be possible to repair the issue by cleaning or cleaning the chip using isopropyl ethanol or electronic cleaner. If the key fob still does not respond after cleaning it, it is likely that the component is damaged and needs to be replaced. A faulty receiver module can also cause the remote control key to stop functioning. This is often caused by electromagnetic interference. A malfunctioning electronic chip The electronic chip that is in your key fob is a vital part in the anti-theft security system in your car. It sends a signal to the immobiliser device in your car to determine whether the key is legitimate. Your car won't start in the event that the chip is damaged. A damaged chip could be caused by interference signals from objects like bad weather conditions or transmitters on the same frequency near your vehicle. In this case you'll need a new key fob. Contacts for the battery that are damaged The battery contacts on the fob's battery can be damaged due to heavy use. If they are damaged or bent, the key fob will not be able to send any signals to the receiver modules in the car. Modern fobs are equipped with rubber seals that keep out water. A splash of water or light rain should be fine but submerging them into saltwater may damage the electronic chip. The key fob has the chip that connects to the vehicle's immobilizer system to allow it to start. This system uses crypto coding systems in modern vehicles or the red key system used in older ones. If the chip is defective it must be replaced. Faulty 12 Volt Batterie A defective battery can cause the key fob not to work. If this happens the car's computer will not be able to recognize that the remote is within the vehicle. Before replacing the battery, test it by using a an voltmeter to gauge its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly then it's time to replace the battery. To test a battery's capacity test the battery's capacity by placing an electrical load on it for a couple of minutes. This will remove 1percent of the surface charges. Then, measure the voltage once more. The higher the capacity of the battery, the longer it can keep its voltage. Ideally, it will remain close to 12 volts for several minutes. The radio signal is not working properly. Radio Signal This is the most frequent reason for keys not sending signals to cars. This issue can be fixed by replacing the battery. It is however important to select a replacement battery that has the same size and voltage as the original. fiat 500 spare key cost uk take a lot of abuse, and they aren't indestructible. Battery contacts and buttons can be damaged by rough handling. A signal can also be disrupted by other transmitters or objects that operate on the same frequency. A light-control panel in your home, for instance, may interfere with key fobs using the same bandwidth. This can affect the remote control of your car. Afflicted OBDII Scan Tool There are many reasons scanner tools may not function. Certain are more complicated than others. Professional scan tools allow a mechanic to monitor the car's network and run a range of self-tests. They can be huge time savers, however they are also extremely expensive, out of the budget of most DIYers. If your OBD2 scan tool fails to turn on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition it's possible that a fuse has been blown. This is one of the most frequent causes of scan tool failure. It is typically easy to fix the issue by replacing the fuse blowing up.