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Fiat Panda Key Fob Replacement Fiat Panda key fobs contain a transponder chip which sends signals to your car to open the doors or start the engine. However, the key fob may not function due to a variety of reasons. A dead battery for the coin is the most frequent cause of key fob malfunctions. Other causes are water damage or a malfunctioning module and interference signals. Dead Coin Battery If your key fob battery has gone out of service, the first thing to do is replace it. Make use of a button cell battery that has the same voltage, size and specifications as the old one. If the key fob was exposed to water (such as saltwater or rain at the beach) it must be cleaned before using again. The best method is to use the paper towel and soak it in isopropyl or electronic cleaner. If the key fob isn't working despite not being exposed water it could be due to a glitch in the receiver module or an internal electronic chip. In these instances it is possible to re-programme the key fob with an OBDII scanner could help. Water Damage You could have water damage to your key fob if it was submerged in a pool, puddle or washing machine. It is usually possible to get it back to working by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It's a good idea allow the fob to dry completely prior to installing a new battery. If your key fob isn't working even after replacing the battery and reconfiguring it, you may have a malfunctioning receiver module. You can find the instructions for reprogramming most vehicles' remote keys on YouTube or refer to the owner's manual. You can also reset the car's computer using the OBDII scanner tool. 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 can also cause the key to stop working. This is typically caused by electromagnetic interference. A malfunctioning electronic chip The electronic chip in your key fob plays a crucial role in the anti-theft security system of your car. It sends a signal to the immobiliser unit of your vehicle to tell it whether the key is valid. Your car won't start in the event that the chip has been damaged. A damaged chip could be caused by interference signals from objects, bad weather conditions or transmitters operating on the same frequency close to your car. In this case the replacement fob will be required. Faulty battery contacts The battery contacts of the fob's battery can be damaged by excessive usage. If they're bent, or broken, the fob won't transmit any signals to receiver modules in the vehicle. Modern fobs are constructed with rubber seals that keep out water. Submerging them in water, even if it's just an occasional drizzle or splash could damage the chip's electronic circuit. The key fob is equipped with chip that communicates with the immobilizer system of the vehicle to start it. The system utilizes the old red keys for older vehicles, or the cryptocoding system that is used in the latest vehicles. This chip will have to be replaced if faulty. Problems with 12 Volt Batteries A malfunctioning battery could cause the key fob to work. The car's computer will not recognize the remote if this occurs. Test the battery using the voltmeter before replacing it to determine its capacity. A fully charged battery should read 12.6 volts. If the reading decreases significantly it's time to change it. To determine the capacity of a battery put an electrical load on it for a few minutes. This will take off about 1 percent of the charge on the surface. Then, you can measure the voltage again. The better the battery's capacity is, the longer it will maintain its voltage. The ideal is to keep it close to 12 volts over several minutes. The radio signal is not working properly. Radio Signal This is the most typical cause of a key fob that ceases to send signals to the car. The battery is able to be replaced to resolve this problem. However, it is important to buy a new battery that has the same voltage and size as the original. Fobs are not indestructible and can take a lot. Contacts on batteries and buttons can be damaged by rough handling. Other objects or transmitters using the same frequency can disrupt a signal. For example, a light-control panel close to your home can transmit interference on the same bandwidth that key fobs use. This could affect the remote control of your car. The tool is not working properly. OBDII scan tool There are a variety of reasons why a scanner tool may not perform. Some are more complex than others. Professional scan tools allow mechanics to observe the car's networks and run a range of self-tests. These can be real time savers, however they're also expensive, and beyond the budget of many DIYers. If your OBD2 scan tool isn't turning on, make sure you check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition there is a chance that a fuse has blown. This is the main reason for a scan tool to fail. It is usually easy to fix the problem by replacing the fuse that has blown.
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