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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 may stop working for a variety. visit the following internet page for key fob failure 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 gone out of service. Use a button cell battery with 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 should be cleaned before being used again. The best solution is to use a paper towel that has been soaked in isopropyl or electronic cleaner. If the key fob hasn't been exposed to water, but still does not work, there may be an issue with the receiver module or an internal electronic chip. In these situations it is possible to re-programme the key fob using an OBDII scanner can aid. Water Damage It is possible to get water damage to your key fob if it was submerged in a puddle, pool or washing machine. It's generally possible to repair it by taking the batteries off and cleaning the circuit board with ruby alcohol. It's best to let the fob completely dry before installing batteries. If your key fob stopped working, even after replacing the battery and reprogramming it, you may have a problem with the receiver module. Reprogramming instructions are available for all vehicles' remote key fobs on YouTube or in the owner's manual. You can also reset the car's computer using the OBDII scanner tool. Faulty Receiver Module The key fob has an electronic chip that communicates with the vehicle's system. If this chip becomes damaged, it will no longer transmit and receive signals to the vehicle. A key fob falling off can result in this, as can exposure to water. If the key fob is not working after exposure to water, it may be possible to fix it by cleaning the chip with isopropyl alcohol or an electronic cleaner. If the key fob does not respond to cleaning, it is likely that the module is in a fault and needs to be replaced. A defective receiver can cause the key to cease to function. This is usually due to electromagnetic interference. A malfunctioning electronic chip The electronic chip in your key fob is an essential element of the anti-theft device in your vehicle. It transmits a message to the immobiliser inside your car to inform it whether the key is legitimate. If the chip is damaged or broken, your vehicle will not start. A damaged chip could be caused by interference signals from other objects, bad weather conditions or transmitters on the same frequency near your vehicle. In this instance an upgrade to the fob will be required. Contacts for the battery that are defective The battery contacts inside the key fob are delicate and may be damaged with hard usage. If they're bent, or damaged, the fob will not send any signals to the receiver modules inside the vehicle. Modern fobs feature rubber seals that keep out water. A splash of water or light rain is fine, but submerging them in saltwater may cause damage to the electronic chip. The key fob has chips that communicate with the vehicle's immobilizer to allow it to activate it. This system makes use of cryptocoding systems in newer vehicles, or the old red key system used in older models. If the chip is defective, it will need to be replaced. Problems with 12 Volt Batteries A damaged battery can cause the remote to cease working. The car's system will not recognize the remote when this happens. Before replacing the battery, you should test it with a an voltmeter for determining its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly, it's time to replace it. To test a battery's capacity put an electrical load on it for a couple of minutes. This will eliminate approximately 1 percent of the charge on the surface. Then, you can measure the voltage. The higher the capacity of the battery, the longer it can keep its voltage. The ideal scenario is to keep it close to 12 volts for several minutes. Faulty Radio Signal This is the most frequent reason for keys not sending signals to a car. The battery can be replaced to solve this issue. It is however important to select a replacement battery that has the same voltage and size as the original. Fobs take a lot of punishment, and aren't impervious to destruction. The battery buttons and contacts are brittle which means they could be bent or damaged from excessive use. Other transmitters or objects operating on the same frequency could also disrupt a signal. For example, a light-control panel that is near your home could transmit interference using the same frequency that key fobs utilize. This can affect the remote control of your car. Afflicted OBDII scan tool There are many reasons why a scanner may not work. Certain are more complicated than others. Professional scan tools let mechanics to observe the car's network, and run various self-tests. These are great time-savers, but they can be expensive and are out of the reach of most DIYers. If your OBD2 scan tool won't power on, check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If all is fine it could be that a fuse has ruptured. This is the most frequent reason for failures of the scanner. It is usually simple to fix the issue by replacing the blown fuse.