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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain transponder chips that send signals to your car to open the doors or start the engine. The fob may stop working due to a variety reasons. A dead battery for the coin is the most frequent cause of a key fob malfunction. Other causes include water damage or a damaged module and interference signals. Dead Coin Battery Replace the battery if your key fob has gone out of service. Choose a button battery with the same voltage, size, and specification as your old one. If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it needs to be cleaned before it is able to be used again. The best method is to use the paper towel and soak it in isopropyl or an electronic cleaner. If the key fob hasn't been exposed to water, but still does not work it could be a problem with the receiver module or an internal electronic chip. In these situations, reprogramming the key fob with an OBDII scanner might aid. 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 get it working again by taking the battery off and cleaning the circuit board with isopropyl alcohol. It's best to let the board completely dry before putting in the battery. You may have a faulty module when your key fob ceases working after replacing the battery or updating. There are instructions for reprogramming most vehicles' remote keys on YouTube, or consult the owner's manual. You can also try resetting the car's computer onboard using the OBDII scan tool. Faulty Receiver Module The key fob's chip is an electronic chip that communicates with the car's system. If the chip is damaged, it cannot longer send and receive signals to the vehicle. A key fob falling off can result in this, as can exposure to water. If the key fob you have purchased has stopped functioning due to water exposure or water exposure, you might be able to fix it by attempting to clean the chip with electronic cleaner or isopropyl alcohol. If the key fob doesn't respond to cleaning, it is likely that the module is in an issue and should be replaced. A malfunctioning receiver module could also cause the remote control key to stop working. This is usually due to electromagnetic interference. Electronic chip that is malfunctioning The electronic chip inside the key fob is a vital element of the anti-theft device in your vehicle. It transmits a message the immobiliser inside your car that tells it if the key is valid. If the chip is damaged or broken, your car will not start. A faulty chip can also be caused by interference signals from objects like bad weather conditions or transmitters on the same frequency as your vehicle. In this situation you'll require a new key fob. Faulty Battery Contacts The battery contacts inside a key fob are very delicate and may be damaged with hard usage. If they are damaged or bent, the fob won't send any signals to the receiver modules in the car. Modern fobs are constructed with rubber seals in order to keep out water. A splash of water or light rain is fine but submerging them into saltwater can cause damage to the chip's electronic components. The key fob comes with an electronic chip that communicates with the immobilizer system of the vehicle in order to start it. The system relies on cryptocoding systems in modern vehicles, or the old red key system in older models. If this chip is faulty it must be replaced. Poor 12 Volt Battery A faulty battery can cause the key fob to stop working. When this occurs, the car's computer system will not recognize that the remote is in the vehicle. Test the battery using the help of a voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly, it's time to replace it. To test the battery's capacity to determine its capacity, put an electric load on it for a couple of minutes. This will remove about 1% of the charge on the surface. After that, measure the voltage. The greater the battery's capacity, the longer it can keep its voltage. fiat doblo key fob replacement should be at 12 volts or less for several minutes. Faulty Radio Signal This is the main reason for a key fob to stop sending signals to vehicles. The battery can be replaced to fix this issue. It is important to buy a battery that has the same dimensions and voltage as the original. Fobs are subject to a lot of punishment, and aren't impervious to destruction. The battery buttons and the contacts are fragile and are susceptible to being bent or broken with rough usage. Other transmitters or objects operating on the same frequency could also interfere with a signal. For example, a light-control panel in your home could transmit interference using the same bandwidth that key fobs utilize. This could cause interference with the remote control of your car. Incorrect OBDII Scan Tool There are many reasons why a scanner may not work. Some are more complex than others. Professional scan tools allow mechanics to look over the car's networks and run a range of self-tests. These can be real time-savers, but they are also extremely expensive and are out of the range of most DIYers. If your OBD2 scan tool isn't turning on, test the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're all fine, a fuse may have been blown. This is one of the most common causes of failures in the scan tool. It is generally easy to fix the problem by replacing the fuse that was blown.