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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip which sends a signal to your car to open the doors and start the engine. The fob could stop working due to a variety reasons. The most commonly cited reason for key fob malfunction is an inoperable coin battery. Highly recommended Site include water damage or a malfunctioning module and interference signals. Dead Coin Battery Replace the battery in case your key fob has died. Make use of a new button battery with the same voltage, size and specification as the original. If the key fob was exposed to water, like a splash of rain or salt water at the beach, it will have to be cleaned before it can be used again. The best solution is to use the paper towel and soak it in isopropyl, or electronic cleaner. If the key fob has not been exposed to water but isn't working it could be because of an issue with the receiver module or an internal electronic chip. In these cases it is possible that reprogramming the key fob with an OBDII scanner can assist. 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 be able to get it back up and running by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's best to allow the fob to dry completely before putting in a brand new battery. You could have a damaged module if your key fob stops working after replacing the battery or reprogramming. There are reprogramming guidelines for most vehicles' remote key fobs on YouTube or in the owner's manual. You can also reset the computer of your car using the OBDII scanner tool. Faulty Receiver Module The key fob is equipped with a chip that connects to the vehicle's system. If the chip is damaged, it can no longer be able to send or receive signals to the vehicle. The key fob being dropped can cause this, as could water exposure. If the key fob you have purchased has stopped working due to water exposure it is possible fix the issue if you clean the chip with electronic cleaner or isopropyl alcohol. If the key fob is still unable to not respond following cleaning, you can be sure that the module is faulty and will need to be replaced. A damaged receiver module may also cause the remote control key to stop working. This usually happens due to electromagnetic interference. A defective electronic chip The electronic chip in your key fob is an essential component of the anti-theft systems in your vehicle. It sends a message to the immobiliser inside your car that tells it that the key is valid. Your car won't start in the event that the chip has been damaged. A damaged chip could be caused by interference signals from other objects or weather conditions that are bad, or transmitters operating on the same frequency near your car. In this situation, you will need a new key fob. Faulty Battery Contacts The battery contacts in the key fob are delicate and can get damaged by repeated use. If they are broken or bent, the fob won't send any signals to the receiver modules inside the car. Modern fobs come with rubber seals to keep out water. Submerging them in water even if it is just a light drizzle or splash, can damage the electronic chip. The key fob contains an embedded chip that communicates to the immobilizer system of the vehicle to begin it. The system uses the old red keys that were used in older vehicles as well as the cryptocoding system used in newer cars. If the chip is not working properly and needs to be replaced. Problems with 12 Volt Batteries A malfunctioning battery could cause the key fob to function. The car's system will not recognize the remote when this happens. Before replacing the battery, test it with an voltmeter for determining its capacity. A fully charged battery should display 12.6 volts. If the reading decreases significantly it's time to change it. Put an electrical load for a short period of time on the battery to gauge its capacity. This will take away about 1 percent of the surface charge. After that, take the voltage once more. The higher the capacity of the battery is, the longer it will keep its voltage. Ideal is that it stays close to 12 volts over several minutes. Problems with Radio Signal This is the most common reason for a keyfob that stops sending signals to the car. The battery could be replaced to fix this issue. It is essential to purchase a battery with the same dimensions and voltage as the original. Fobs are not indestructible and can be damaged by a lot. The battery contacts and buttons are delicate, so they can get bent or damaged by the force of. Other transmitters or objects that use the same frequency may also interfere with the signal. For instance, a light-control panel close to your home can send interference over the same frequency as key fobs use. This could interfere with the remote control of your car. Faulty OBDII Scan Tool There are many reasons why a scanner may not work. Some are more complicated than others. Professional scan tools let mechanics to monitor the car's network and run various self-tests. These tools can save you a lot of time, but they are costly and not accessible to the majority of DIYers. If your OBD2 scanner won't start examine 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 has blown. This is the most common reason for failures of the scanner. The most straightforward fix is to replace the fuse which has blown.