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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 to unlock doors or turn on the motor. However, the fob could be inoperable due to various reasons. A dead battery for the coin is the most frequent cause of key fob malfunctions. Other causes include water damages or a damaged module and interference signals. Dead Coin Battery Replace the battery if the key fob has failed. Choose The Key Lab that is identical in size, voltage and specifications like the previous one. If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned prior to using it again. The best solution is to use a paper towel that has been soaked in isopropyl or electronic cleaner. If the key fob hasn't been exposed to water but isn't working, there may be an issue with the receiver module or an internal electronic chip. In these situations you can reprogramme the key fob with an OBDII scanner may help. Water Damage You could have water damage to your key fob if it was submerged in a puddle, pool or washing machine. It is usually possible to get it back to working by removing the battery and scrubbing the circuit board with isopropyl alcohol. It is a good idea to allow the fob to dry completely before putting in a brand new battery. You may have a faulty module when your key fob ceases working after replacing the battery or reprogramming. Reprogramming instructions are available for most remote key fobs on YouTube or in the owner's manual. You can also try resetting the car's onboard computer using the OBDII scan tool. Faulty Receiver Module The key fob contains a chip that communicates with the vehicle's system. This chip will stop sending and receiving signals to the car if damaged. This could be due to dropping the key fob or by exposure to water. If the key fob stopped functioning 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, then it is likely that the receiver module is not functioning properly and must be replaced. A malfunctioning receiver could cause the key to stop working. This is typically caused by electromagnetic interference. Faulty Electronic Chip The electronic chip inside the key fob is a crucial element of the anti-theft device in your vehicle. It sends a message to the immobiliser in your car to inform it whether the key is genuine. The car won't start in the event that the chip is damaged. A defective chip can be caused by interference signals from other objects such as weather conditions, objects or transmitters operating on the same frequency in close proximity to your vehicle. In this scenario it is likely that a new fob would be needed. Contacts to the battery are not working properly. The battery contacts in the key fob are delicate and may be damaged with hard usage. If they're bent or broken the fob will not transmit any signals to the receiver modules in the car. Modern fobs are designed with rubber seals that keep out water. A splash of water or a light rain is acceptable however, submerging them in saltwater could cause damage to the electronic chip. The key fob has a chip which communicates with the immobilizer system of the vehicle, allowing it to start it. The system is based on the red keys of older vehicles or the crypto coding system in newer vehicles. If the chip is damaged, it will need to be replaced. Problems with 12 Volt Batteries A malfunctioning battery could cause the key fob to cease working. When this happens, the car's computer system won't recognize that the remote is in the vehicle. Before you replace the battery, test it using a an voltmeter for determining its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly then it's time to replace it. To determine the capacity of a battery to determine its capacity, put an electric load on it for a couple of minutes. This will take off approximately 1 percent of the surface charge. Then, measure the voltage once more. The longer a battery is able to keep its voltage steady and the higher its capacity. It should be close to 12 volts for several minutes. Problems with Radio Signal This is the most common reason for keys not sending signals to a car. The issue can be fixed by replacing the battery. It is essential to purchase a battery with the same voltage and dimensions as the original. Fobs aren't indestructible and are susceptible to damage. The battery buttons and the contacts are fragile and are susceptible to being bent or damaged by excessive use. Other transmitters or objects that use the same frequency can also interfere with a signal. For example, a light-control panel in your home could transmit interference using the same frequency that key fobs use. This can affect the remote control of your car. Incorrect OBDII Scan Tool There are a number of reasons why a scanner could not function. Certain are more complicated than others. Professional scan tools permit mechanics to observe the car's networks and run a range of self-tests. These are real time savers but they're also expensive, out of the reach of most DIYers. If your OBD2 scan tool isn't turning on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition the chances are that a fuse has blown. This is the main reason for a scan tool to fail. The easiest solution is to replace the fuse that has been blown.