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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder, which sends a signal from the fob to the car that allows it to unlock doors or turn on the motor. The fob could stop working for a variety. The most commonly cited reason for key fob malfunction is an inoperable coin battery. Other causes include water damage or a malfunctioning module and interference signals. Dead Coin Battery If your key fob's battery has failed, the initial step is to replace it. Make use of a button cell battery that has the same voltage, size, and specifications as the previous one. If the key fob was exposed to water (such as saltwater or rain at the beach) it must be cleaned prior to using it again. A paper towel that has been soaked in isopropyl alcohol or electronic cleaner will work wonders. If the key fob isn't working even though it is not exposed to water it could be due to a problem in the receiver module or internal electronic chip. In spare key fiat 500 can reprogramme the key fob using an OBDII scanner might aid. Water Damage It is possible to get water damage if your key fob 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 is recommended to let the circuit board completely dry before installing batteries. You may have a faulty module if your key fob stops working after replacing the battery or reprogramming. You can find information on the reprogramming of most remote keys on YouTube or refer to the owner's manual. You can also reset your computer of your vehicle using the OBDII scanner tool. Faulty Receiver Module The key fob is equipped with a chip which communicates with the vehicle's system. This chip will stop sending and receiving signals to the car if damaged. This could be due to dropping the key fob or due to exposure to water. If the key fob stopped working after water exposure it could be possible to fix the issue by cleaning the chip with isopropyl alcohol or electronic cleaner. If the key fob doesn't respond to cleaning, it is possible that the receiver module has a fault and needs to be replaced. A faulty receiver module can also cause the remote control key to stop working. This is usually due to electromagnetic interference. Faulty Electronic Chip The electronic chip in the key fob is a crucial element of the anti-theft device in your vehicle. It transmits a message the immobiliser inside your car to inform it if the key is valid. If the chip is damaged or broken, your vehicle won't start. A faulty chip can also be caused by interference signals from objects such as weather conditions, objects or transmitters operating on the same frequency close to your vehicle. In this situation the replacement fob will be required. Contacts of the battery may be damaged. The battery contacts of the fob's key can be damaged due to heavy use. If they're bent or damaged, the fob will not send any signals to the receiver modules in the vehicle. Modern fobs are designed with rubber seals to keep out water. Immersing them in water, even if it is just small splash or drizzle can harm the electronic chip. The key fob comes with an electronic chip that communicates with the immobilizer system of the vehicle in order to start it. This system utilizes cryptocoding systems in the latest vehicles and the older red key system in older ones. If the chip is defective it must be replaced. A faulty 12 Volt battery A malfunctioning battery could cause the key fob to function. When this occurs, the car's computer system cannot recognize that the remote is within the vehicle. Before replacing the battery, test it by using a the voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly, it's time to replace it. To test a battery's capacity put an electrical load on it for a few minutes. This will remove 1% of the surface charges. Then measure the voltage again. The higher the capacity of the battery, the longer it can keep its voltage. It should be close to 12 volts for several minutes. The radio signal is not working properly. Radio Signal This is the main reason for a key fob to stop sending signals to the car. The battery can be replaced to solve this issue. It is crucial to purchase an identical battery voltage and dimensions as the original. The buttons are not impervious to destruction and are susceptible to damage. Contacts on batteries and buttons can be damaged by rough handling. Other objects or transmitters using the same frequency can interfere with a signal. For instance, a lighting control panel in your home could transmit interference using the same frequency that key fobs utilize. This can interfere with the remote control of your car. Afflicted OBDII Scan Tool There are many reasons scanners don't work. Certain are more complicated than others. Professional scan tools allow a mechanic to observe the car's networks and run a range of self-tests. These tools can save you a lot of time, but they're expensive and out of reach for the majority of DIYers. If your OBD2 scan tool isn't turning on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If these are both present the chances are that a fuse has failed. This is the main reason for a scan tool to fail. It is typically easy to fix the problem by replacing the fuse that has blown.