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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain an transponder chip that transmits a signal to your car to open the doors or start the engine. The fob might stop working due to a variety reasons. The most common cause of key fob malfunction is a dead coin battery. Other causes include water damage or a malfunctioning module and interference signals. Dead Coin Battery Replace the battery if the key fob has died. Make use of 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 be the solution. If the key fob has not been exposed to water but still does not work it could be an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob by using an OBDII scan could aid in these situations. Water Damage You might have water damage to your key fob if it was submerged in a puddle, pool or washing machine. It is usually possible to fix it by removing the batteries and cleaning the circuit board using ruby alcohol. It's a good idea to allow the fob to dry completely before installing a new battery. If your key fob stopped working, even after replacing the battery and reprogramming it, you may have a malfunctioning receiver module. You can find instructions for the reprogramming of most remote keys on YouTube or refer to your owner's manual. You could also try resetting the car's computer onboard using the OBDII scan tool. Faulty Receiver Module The key fob contains the chip that communicates the vehicle's system. If this chip becomes damaged, it cannot longer be able to send or receive signals to the vehicle. Dropping the key fob can result in this, as can exposure to water. If your key fob isn't working due to exposure to water it is possible to fix it if clean the chip with electronic cleaner or isopropyl ethanol. If the key fob doesn't respond to cleaning, it is possible that the component has a fault and needs to be replaced. A defective receiver module could also cause the remote control key to cease functioning. This is usually due to electromagnetic interference. Faulty Electronic Chip The electronic chip inside your key fob is a vital role in the anti-theft system in your car. It transmits a message the immobiliser in your car to tell it whether the key is legitimate. If the chip is damaged or broken, your car will not start. A faulty chip can also be caused by interference signals from other objects or weather conditions that are bad, or transmitters on the same frequency as your vehicle. In this scenario, a new fob will be required. Contacts for the battery that are damaged The battery contacts inside a key fob are very fragile and are susceptible to damage when used for long periods of time. If they're bent or broken, the fob won't transmit any signals to receiver modules inside the vehicle. Modern fobs are designed with rubber seals in order to keep out water. Immersing them in water, even if just small splash or drizzle could damage the electronic chip. The key fob is equipped with an embedded chip that communicates to the immobilizer system of the vehicle in order to start it. The system is based on the old red keys that were used in older vehicles as well as the cryptocoding system that is used in newer cars. The chip must be replaced if it's damaged. A faulty 12 Volt battery A defective battery can cause the remote to cease to function. When this happens, the car's computer system cannot recognize that the remote is inside the vehicle. Before you 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 dramatically it is time to replace the battery. Set an electrical load for a short time on the battery to gauge its capacity. This will take away 1% of the surface charges. After that, measure the voltage. The longer a battery can keep its voltage steady, the better its capacity. It should be close to 12 volts for several minutes. Faulty Radio Signal This is the main reason for a keyfob that ceases to send signals to the car. The battery can be replaced to solve this issue. It is crucial to purchase an identical battery dimensions and voltage as the original. replacement fiat 500 key fob are subject to a lot of punishment, and aren't indestructible. The battery contacts and buttons are delicate which means they could be bent or broken by excessive use. Other transmitters or objects operating on the same frequency may also disrupt a signal. For instance, a light control panel close to your home can send interference on the same bandwidth that key fobs use. This can affect the remote control of your car. The tool is not working properly. OBDII scan tool There are many reasons a scanner tool may not work. Some are more complicated than others. Professional scan tools allow a mechanic to look over the car's networks and conduct a variety self-tests. These tools can save time, but are costly and out of reach for the majority of DIYers. If your OBD2 scan tool fails to turn on, test the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition it could be that a fuse has been blown. This is among the most frequent causes of a scan tool failing. The easiest fix is to replace the blown fuse.