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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip that sends signals to your car to open the doors or start the engine. The fob may stop working due to a variety of reasons. The most commonly cited reason for key fob malfunction is the battery of the coin is dead. Other causes include water damage a faulty receiver module and signal interference. Dead Coin Battery If your key fob battery has died, the first thing to do is replace it. Use a brand new button battery with exactly the same size, voltage and specifications as the original. If the key fob has been exposed to water, for example a splash of rain or salt water on the beach, it will have to be cleaned before it can be used again. A paper towel soaked in alcohol or electronic cleaner will work wonders. If the key fob hasn't been exposed to water, but remains inoperable it could be a problem with the receiver module or an internal electronic chip. In these cases, reprogramming the key fob using an OBDII scanner can help. Water Damage If your key fob has gotten submerged in a pool or puddle, or taken a trip down the wash machine, it could have some water damage. It is usually possible to restore it's functionality by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It is best to let the circuit board completely dry before installing a battery. You may have a faulty module when your key fob ceases working after replacing the battery or reprogramming. You can find the instructions for the reprogramming of most remote keys on YouTube, or consult your owner's manual. You can also reset your car's computer using the OBDII scanner tool. Faulty Receiver Module The key fob is equipped with an electronic chip that communicates with the vehicle's system. If the chip is damaged, it will be unable to longer transmit or receive signals to the vehicle. This could be due to dropping the key fob or by exposure to water. If the key fob has stopped working after exposure to water, it is possible to fix the issue by cleaning the chip using isopropyl alcohol or electronic cleaner. If the key fob is still unable to not respond following cleaning, there is a good chance that the module is defective and needs to be replaced. A damaged receiver module may also cause the remote control key to not function. This is usually due to electromagnetic interference. Faulty Electronic Chip The electronic chip in your key fob plays a crucial role in the anti-theft security system of your vehicle. It sends out a signal the immobiliser unit inside your car to inform it whether the key is legitimate. The car will not start when the chip is damaged. A damaged chip could be caused by interference from other objects, bad weather or transmitters located near your vehicle. In this situation an upgrade to the fob will be needed. Contacts with the battery may be damaged. The battery contacts inside a key fob are very delicate and could be damaged by repeated use. If they are broken or bent, the fob won't send any signals to the receiver modules in the car. Modern fobs are equipped with rubber seals to keep out water. Submerging them in water, even if it's just small splash or drizzle can harm the electronic chip. The key fob houses an electronic chip that communicates with the vehicle's immobilizer system to allow it to start. The system uses the old red keys that were used in older vehicles or the cryptocoding system used in the latest vehicles. This chip needs to be changed if it is faulty. The 12 Volt Battery is faulty A malfunctioning battery could cause the key fob not to work. When this happens the car's computer will not be able to recognize that the remote is inside the vehicle. Before replacing the battery, test it by using a a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading drops significantly, it's time to replace it. To test the battery's capacity to determine its capacity, put an electric load on it for a few minutes. This will take off about 1% of the charge on the surface. Then take another measurement of the voltage. The longer a battery can hold its voltage greater is its capacity. Ideally, it will remain at or near 12 volts for several minutes. thekeylab.co.uk is not working properly. Radio Signal This is the most typical reason behind a key fob that ceases to send signals to the car. This issue can be resolved by replacing the battery. It is important to buy a battery with the same dimensions and voltage as the original. Fobs aren't indestructible and can be damaged by a lot. The battery buttons and contacts are brittle and can be bent or broken by excessive use. Other transmitters or objects that use the same frequency may also disrupt the signal. A light-control system in your home, for example can interfere with key fobs that use the same frequency. This could interfere with your car's remote control. Faulty OBDII scan tool There are a number of reasons why a scanner may not work. Certain are more complicated than others. Professional scan tools enable mechanics to look over the car's network and run various self-tests. These can be real time savers but they are also extremely expensive and are out of the budget of most DIYers. If your OBD2 scan tool doesn't turn on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're all fine there is a chance that a fuse has blown. This is the most frequent reason for failure of the scan tool. The simple fix is usually to replace the fuse which has blown.