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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder that sends a signal from the fob to the car to unlock doors or start the motor. The fob can stop functioning for a variety. The most common cause of key fob malfunction is a dead coin battery. Other causes are water damage or a damaged module and interference signals. Dead Coin Battery If your key fob battery has failed, the initial thing to do is replace it. Use a button cell that has the same voltage, size and specifications as the old one. If the key fob was exposed to water (such as rain or saltwater at the beach) It must be cleaned before being used again. A paper towel soaked in alcohol or electronic cleaner will do the trick. If the key fob hasn't been exposed to water but remains inoperable it could be due to an issue with the receiver module or an internal electronic chip. In these instances, reprogramming the key fob with an OBDII scanner could aid. Water Damage If your key fob took immersed in a pool or puddle or even a trip through the washing machine, you might have some water damage. It's possible to fix it by getting rid of the batteries and cleaning the circuit board with rubbing alcohol. It's best to let the board completely dry prior to installing a battery. You may have a faulty module if your key fob stops working after replacing the battery or changing the programming. You can find reprogramming procedures for most vehicles' remote key fobs on YouTube or in the owner's manual. You can also reset the computer in your car with 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 can no 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 functioning after exposure to water, it could be possible to repair the issue by cleaning or cleaning the chip with isopropyl alcohol or an electronic cleaner. If the key fob does not respond to cleaning, it's likely that the module is in issues and needs to be replaced. A damaged receiver module may also cause the remote control key to stop functioning. 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 transmits a signal to the immobiliser unit inside your car to determine whether or not the key is in fact valid. If the chip is damaged or broken, your vehicle won't start. A malfunctioning chip could be caused by interference signals from other objects, bad weather conditions or transmitters on the same frequency near your car. In this instance, you will need an entirely new key fob. Faulty battery contacts The battery contacts in the key fob are delicate and could be damaged by repeated use. If they are broken or bent, the fob will not be able to send any signals to the receiver modules inside the car. Modern fobs are made with rubber seals in order to keep out water. In the event of submerging them in water, even if it's just a light drizzle or splash, can damage the electronic chip. The key fob has the chip that connects to the vehicle's immobilizer system to activate it. This system uses crypto coding systems in vehicles that are more modern and the older red key system for older models. This chip will have to be replaced if malfunctioning. A faulty 12 Volt battery A faulty battery can cause the key fob to stop working. When this occurs, the car's computer system won't recognize that the remote is inside the vehicle. Before you replace the battery, you should test it with a a voltmeter to determine its capacity. The Key Lab charged battery will read 12.6 volts. If the reading falls dramatically, it is time to replace the battery. To test the battery's power, place an electrical load on it for a couple of minutes. This will take away approximately 1% of the surface charge. Then measure the voltage again. The longer a battery can hold its voltage, the better its capacity. The ideal scenario is to keep it close to 12 volts several minutes. Radio Signal Faulty Radio Signal This is the most frequent reason for a key fob that ceases to send signals to the car. The battery is able to be replaced to resolve this issue. It is important to buy batteries that have the same voltage and dimensions as the original. Fobs take a lot of abuse, but they're not indestructible. Battery contacts and buttons can be damaged through rough handling. The signal could also be interrupted by other transmitters or objects that use the same frequency. A light-control panel in your home, for instance could interfere with key fobs that have the same frequency. This can interfere with the remote control of your car. Afflicted OBDII Scan Tool There are a variety of reasons why scanners don't function. Some are more complex than others. Professional scan tools allow mechanics to observe the car's networks and conduct a variety self-tests. These tools can save a lot of time, but are expensive and out of reach for most DIYers. If your OBD2 scanner won't start, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition, it's likely that a fuse has blown. This is the most typical cause of scan tool failure. The easiest solution is to replace the fuse that has been blown.