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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain transponder chips that send the signal to your vehicle to open the doors or start the engine. However, the fob could be inoperable due to various reasons. A dead battery for the coin is the most common reason for the malfunction of a key fob. Other causes include water damage an inoperative receiver module and signal interference. Dead Coin Battery Replace the battery if your key fob has failed. Use a new button cell battery with the same size, voltage, and specification as the old one. If the key fob was exposed to water (such as rain or saltwater at the beach) It must be cleaned before using again. A paper towel that has been soaked in isopropyl alcohol or electronic cleaner will work wonders. If the key fob isn't working despite not being exposed water, it could be due to a problem in the receiver module, or even in the internal electronic chip. Reprogramming the keyfob using an OBDII scan can assist in these situations. Water Damage It is possible to get water damage to your key fob if it was submerged in a pool, puddle or washing machine. You can usually get it working again by taking the battery off and cleaning the circuit board with isopropyl alcohol. It is best to let the board completely dry prior to installing the battery. You may have a faulty module if your key fob stops working after replacing the battery or changing the programming. There are instructions for the reprogramming of most remote keys on YouTube or consult your owner's manual. You can also reset the car's computer using the OBDII scanner tool. Faulty Receiver Module The key fob is equipped with an electronic chip that 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 by water exposure. If the key fob is not working after exposure to water, it could be possible to repair it by cleaning the chip using isopropyl ethanol or electronic cleaner. If the key fob won't respond to cleaning, it's possible that the module has an issue and should be replaced. A faulty receiver module can also cause the remote control key to cease functioning. This is usually caused by electromagnetic interference. A malfunctioning electronic chip The electronic chip in your key fob plays a vital part in the anti-theft security system of your vehicle. It sends a signal to the immobiliser unit of your car to inform it whether the key is genuine. The car won't start in the event that the chip has been damaged. 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 scenario you'll require an entirely new key fob. Faulty Battery Contacts The battery contacts in a key fob are very fragile and are susceptible to damage when used for long periods of time. If they're bent or damaged, the fob will not send any signals to receiver modules inside the vehicle. Modern fobs come with rubber seals in order to keep out water. A splash of water or light rain is acceptable but submerging them into salt water could damage the electronic chip. The key fob has an embedded chip that communicates to the immobilizer system of the vehicle in order to start it. fiat car key uses the old red keys in older vehicles as well as the crypto coding system in modern vehicles. If the chip is defective it must be replaced. Faulty 12 Volt Battery A damaged battery can cause the key fob to cease to function. When this happens, the car's computer system will not be able to recognize that the remote is inside the vehicle. Test the battery using a voltmeter before replacing it to determine its capacity. A fully charged battery will display 12.6 volts. If the reading falls dramatically it is time to replace the battery. To test a battery's capacity, place an electrical load on it for a few minutes. This will take away 1% of the surface charges. Then, you can measure the voltage once more. The better the battery's capacity, the longer it can maintain its voltage. Ideal is that it stays close to 12 volts over several minutes. The radio signal is not working properly. Radio Signal This is the most common reason behind a key fob that ceases to send signals to the car. The battery could be replaced to fix this problem. It is essential to purchase an identical battery dimensions and voltage as the original. Fobs can take a lot punishment, and aren't impervious to destruction. The battery buttons and contacts are delicate and can be bent or damaged from the force of. A signal may also be impacted by other objects or transmitters that operate on the same frequency. For instance, a light control panel near your home may send interference on the same bandwidth that key fobs utilize. This could cause interference with the remote control of your car. Faulty OBDII scan tool There are a variety of reasons why scanners don't function. Certain are more complicated than others. Professional scan tools enable mechanics to monitor the car's network and run various self-tests. These are great time savers but they can also be very expensive and are out of the budget of many 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 both are in good condition there is a chance that a fuse has failed. This is the most common reason for failure of the scan tool. It is usually easy to fix the issue by replacing the fuse blowing up.