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Fiat Panda Key Fob Replacement Fiat Panda keyfobs are equipped with a transponder which transmits a signal from the fob to the car to open doors or start the motor. The fob could stop working for a variety of reasons. A dead coin battery is the most frequent cause of key fob malfunctions. Other causes include water damages, a faulty module, and interference signals. Dead Coin Battery If the battery in your key fob has gone out of service, the first step is to replace it. Use a new button cell battery that is identical in size, voltage and specification as the original. If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it's going to need to be cleaned before it is able to be used again. The best way to do this is using an old towel soaked in isopropyl, or electronic cleaner. If the key fob has not been exposed to water, but still does not work it could be because of a problem with the receiver module or an internal electronic chip. In these instances it is possible to re-programme the key fob using an OBDII scanner can aid. Water Damage You might have water damage to your key fob if it was submerged in a puddle, pool or washing machine. It's generally possible to fix it by taking out the batteries and cleaning the circuit board with rubbing alcohol. It is a good idea to allow the fob to dry completely before putting in a brand new battery. If your key fob stopped working even after replacing the battery and changing the program, you could have a malfunctioning receiver module. You can find information on changing the programming of most remote keys on YouTube, or consult the owner's manual. You can also try resetting the car's onboard computer using the OBDII scan tool. Faulty Receiver Module The key fob contains the chip that communicates the vehicle's system. This chip will stop sending and receiving signals to the car when it is damaged. The key fob being dropped can cause this, as could exposure to water. If the key fob stopped working after exposure to water it could be possible to fix it by cleaning the chip using isopropyl alcohol or electronic cleaner. If the key fob doesn't respond to cleaning, it's likely that the module is in an issue and must be replaced. A damaged receiver can cause the key to stop working. This is typically caused by electromagnetic interference. Faulty Electronic Chip The chip inside your key fob is a vital part in the anti-theft security system of your vehicle. It sends a signal to the immobiliser in your car that tells it whether the key is genuine. If the chip is damaged or broken, the car will not start. A defective chip can be caused by interference signals from other objects like bad weather conditions or transmitters operating on the same frequency as your car. In this scenario you'll need a new key fob. Contacts of the battery may be damaged. The battery contacts on the fob's battery can be damaged by heavy usage. If they are bent, or broken, the fob won't send any signals to receiver modules inside the vehicle. Modern fobs are constructed with rubber seals that keep out water. A splash of water or light rain is acceptable However, submerging them in saltwater may damage the chip's electronic components. The key fob is equipped with a chip which communicates with the immobilizer system of the vehicle to begin it. The system utilizes the old red keys that were used in older vehicles as well as the crypto coding system in modern vehicles. If this chip is faulty and needs to be replaced. The 12 Volt Battery is faulty A defective battery can cause the key fob not to work. When this occurs the car's computer will not be able to recognize that the remote is in the vehicle. Before you replace the battery, you should test it with a an voltmeter for determining its capacity. A fully charged battery will display 12.6 volts. If the reading drops significantly then it's time to replace the battery. Set an electrical load for a short period of time on the battery to gauge its capacity. This will eliminate about 1% of the charge on the surface. Then take another measurement of the voltage. The higher the capacity of the battery, the longer it can keep its voltage. Ideally, it will remain at 12 volts or less for several minutes. The radio signal is not working properly. Radio Signal This is the main reason for the key fob to stop sending signals to the car. This issue can be fixed by replacing the battery. It is however important to buy a new battery that is the same size and voltage as the original one. Fobs are not indestructible and can withstand a lot. have a peek at this site and contacts are delicate and can be bent or damaged by rough usage. Other transmitters or objects that use the same frequency can interfere with the signal. For instance, a light control panel that is near your home could transmit interference using the same bandwidth that key fobs use. This could interfere with 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 enable mechanics to observe the car's networks and run various self-tests. These are great time savers, however they're also expensive and are out of the reach of most DIYers. If your OBD2 scanner isn't turning on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they're all fine the fuse could have been blown. This is one of the most frequent causes of failures in the scan tool. The easiest fix is to replace the fuse that is blowing up.