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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 unlock the doors or start the engine. However, the fob can be inoperable due to various reasons. A dead battery for the coin is the most common reason for key fob malfunctions. Other causes include water damage or a malfunctioning module and interference signals. Dead Coin Battery Replace the battery if the key fob has died. Use a brand new button battery that is the same voltage, size and specifications as the previous one. If the key fob was exposed to water, like a splash of rain or salt water on the beach, it needs to be cleaned before it can be used again. A paper towel soaked with isopropyl alcohol or electronic cleaner will be the solution. If the key fob doesn't working despite being not exposed to water, it could be due a malfunction in the receiver module or an internal electronic chip. Reprogramming the keyfob by using an OBDII scan may help in these cases. Water Damage There could be water damage if your key fob was submerged in a puddle, pool or washing machine. You can usually restore it's functionality 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 new battery. If your key fob has stopped working even after replacing the battery and reconfiguring it, you may have a problem with the receiver module. You can find the instructions for changing the programming of most remote keys on YouTube or consult your owner's manual. You can also reset the computer of your car using the OBDII scanner tool. Faulty Receiver Module The key fob has a chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if it becomes damaged. Dropping the key fob can cause this, as well as exposure to water. If the key fob you have purchased has stopped working due to water exposure and you are unable to fix it if you clean the chip with electronic cleaner or isopropyl alcohol. If the key fob does not respond to cleaning, it's possible that the receiver module has an issue and should be replaced. A defective receiver module could also cause the remote control key to cease functioning. This is typically caused by electromagnetic interference. A defective electronic chip The electronic chip inside your key fob is a crucial part of the anti-theft system in your vehicle. It sends a signal to the immobiliser in your car to determine whether the key is legitimate. If the chip is damaged or damaged, your car won't start. A faulty chip may also be caused by interference caused by objects, bad weather or transmitters located near your vehicle. In this situation, you will need an entirely new key fob. Faulty Battery Contacts The battery contacts on the key fob could be damaged due to heavy use. If they're bent or broken, the fob won't send any signals to the receiver modules in the vehicle. Modern fobs are constructed with rubber seals that keep out water. Submerging them in water even if it's just an occasional drizzle or splash could harm the chip's electronic circuit. The key fob is equipped with the chip that connects to the vehicle's immobilizer system to activate it. This system utilizes cryptocoding systems in modern vehicles, or the old red key system in older ones. If this chip is faulty it will have to be replaced. The 12 Volt Battery is faulty A faulty battery may cause the key fob to work. When this happens the car's computer will not be able to recognize that the remote is inside the vehicle. Before fiat key fob replacement replace the battery, test it by using a an voltmeter to gauge its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly it is time to replace the battery. Place an electrical load for a short time on the battery to check its capacity. This will take away approximately 1 percent of the charge on the surface. After that, take the voltage again. The higher the capacity of the battery, the longer it can keep its voltage. Ideally, it should remain close to 12 volts several minutes. Faulty Radio Signal This is the main reason for a key fob that stops sending signals to the car. This issue can be fixed by replacing the battery. However, it is important to choose a battery with the same size and voltage as the original. The buttons are not impervious to destruction and can take a lot. Battery contacts and buttons can be damaged by rough handling. Other transmitters or objects using the same frequency could also interfere with a signal. For instance, a lighting control panel that is near your home could transmit interference using the same bandwidth that key fobs utilize. This can affect the remote control of your car. Problems with OBDII Scan Tool There are many reasons why a scan tool might 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 can be real time savers but they can be expensive, and beyond the budget of most DIYers. If your OBD2 scan tool fails to turn on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they're all fine the fuse could have failed. This is one of the most frequent causes of a scan tool failing. The easiest solution is to replace the fuse that is blowing up.