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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain transponder chips that send an alert to your car to open the doors or start the engine. However, the key fob may be inoperable due to various reasons. The most common reason for key fob malfunction is a dead coin battery. Other reasons include water damage, malfunctioning receiver modules, and signal interference. Dead Coin Battery Replace the battery if the key fob is dead. Use a button cell battery with the same voltage, size, and specifications as your previous one. If the key fob was exposed to water (such as rain or saltwater at the beach) it must be cleaned prior to being used again. A paper towel that has been soaked in isopropyl alcohol or electronic cleaner will do the trick. If the key fob has not been exposed to water but still does not work it could be a problem with the receiver module or an internal electronic chip. In these situations it is possible to re-programme the key fob with an OBDII scanner could aid. Water Damage There could be water damage if your key fob was submerged in a puddle, pool or washing machine. It is usually possible to restore it's functionality by taking the battery off and cleaning the circuit board with isopropyl alcohol. It is best to let the circuit board completely dry before installing the battery. You may have a faulty module in the event that your key fob stops working after replacing the battery or changing the programming. You can find information on the reprogramming of most remote keys on YouTube, or consult the owner's manual. You can also try resetting the car's computer onboard using the OBDII scan tool. Faulty Receiver Module The key fob is equipped with the chip that communicates with the car'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 stops functioning after exposure to water, it may be possible to fix it by cleaning the chip with isopropyl alcohol, or electronic cleaner. If the key fob is still unable to not respond even after cleaning it you can be sure that the receiver module is not functioning properly and must be replaced. A damaged receiver module may also cause the remote control key to stop functioning. This is typically caused by electromagnetic interference. A malfunctioning electronic chip The chip that is embedded in your key fob is an essential part of the anti-theft system in your car. It transmits a message to the immobiliser in your car that tells it that the key is valid. fiat doblo key fob replacement will not start when the chip is damaged. A defective chip can be caused by interference signals from objects, bad weather conditions or transmitters on the same frequency as your car. In this instance it is likely that a new fob would be required. Contacts for the battery that are defective The battery contacts of the key fob could be damaged by heavy usage. If they are damaged or bent, the key fob will not send any signals to the receiver modules inside the car. Modern fobs feature rubber seals that block out water. Immersing them in water, even if it is just a light drizzle or splash could damage the chip's electronic components. The key fob has the chip that connects to the vehicle's immobilizer system in order to start it. It uses the old red keys for older vehicles or the crypto coding system in newer vehicles. This chip will have to be replaced if defective. Faulty 12 Volt Batterie A defective battery can cause the key fob to cease to function. The car's computer will not recognize the remote if this happens. 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. Set an electrical load for a short time on the battery to gauge its capacity. This will take away about 1 percent of the surface charge. Then, measure the voltage once more. The better the battery's capacity, the longer it can keep its voltage. It should be at 12 volts or less for several minutes. Radio Signal Faulty Radio Signal This is the most common reason for the key fob to stop sending signals to a car. The issue can be fixed by replacing the battery. It is crucial to buy a battery that has the same dimensions and voltage as the original. The buttons are not impervious to destruction and can be damaged by a lot. The battery contacts and buttons could be damaged by rough handling. Other transmitters or objects using the same frequency can disrupt the signal. A light-control panel in your home, for example, may interfere with key fobs using the same bandwidth. This could interfere with the remote control of your car. Incorrect OBDII scan tool There are many reasons scanners don't function. Certain are more complicated than others. Professional scan tools enable mechanics to monitor the car's network, and run various self-tests. These tools can save time, but are costly and are out of reach for the majority of DIYers. If your OBD2 scanner isn't turning on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition the chances are that a fuse is blowing. This is one of the most frequent causes of a scan tool failing. The most straightforward fix is to replace the blown fuse.