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Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that sends an electronic signal from the fob to the car to unlock doors or turn on the motor. However, the fob could not function due to a variety of reasons.
A dead coin battery is the most common cause of malfunctioning keys. Other causes include water damages or a damaged module and interference signals.
Dead Coin Battery
Replace the battery if your key fob has failed. Make use of a button cell battery that has the same voltage, size and specifications as the previous one.
If the key fob was exposed to water, like a splash of rain or salt water on the beach, it will have to be cleaned before it can be used again. A paper towel soaked in alcohol or electronic cleaner can work wonders.
If the key fob hasn't been exposed to water, but isn't working it could be because of an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob through an OBDII scan may help in these cases.
Water Damage
You might have water damage if your key fob was submerged in a puddle, pool or washing machine. It's usually possible to get it working again by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It's best to let the board completely dry prior to installing batteries.
There could be a problem with the module in the event that your remote stops working after replacing the battery or changing the programming. There are reprogramming guidelines for most remote key fobs on YouTube or in the owner's guide. G28 can also reset the computer in your car with the OBDII scanner tool.
Faulty Receiver Module
The key fob is equipped with an electronic chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if it becomes damaged. This can be caused by dropping the key fob, or by exposure to water. If the key fob you have purchased has stopped functioning due to water exposure, you may be able to fix it if you clean the chip with electronic cleaner or isopropyl alcohol.
However, if the key fob is still unable to not respond after cleaning it there is a good chance that the component is damaged and needs to be replaced. A faulty receiver can also cause the key to stop working. This is often caused by electromagnetic interference.
Faulty Electronic Chip
The electronic chip that is in your key fob plays a vital function in the anti-theft security system in your car. It sends out a signal the immobiliser unit of your vehicle to tell it whether the key is legitimate. If the chip is damaged or broken, the car won't start.
A malfunctioning chip can be caused by interference from other objects, weather conditions or transmitters located near your vehicle. In this scenario, a new fob will be needed.
Contacts to the battery are not working properly.
The battery contacts on the key fob could be damaged by excessive usage. If they're bent or broken, the fob won't send any signals to receiver modules inside the vehicle.
Modern fobs are equipped with rubber seals that keep out water. A splash of water or a light rain is acceptable However, submerging them in saltwater can harm the electronic chip.
The key fob comes with an embedded chip that communicates to the immobilizer system of the vehicle to start it. The system uses the red keys of older vehicles as well as the cryptocoding system used in newer vehicles. The chip must be changed if it is malfunctioning.
Problems with 12 Volt Batteries
A defective battery can cause the key fob to work. The car's computer may not recognize the remote if this happens.
Test the battery with the voltmeter before replacing it to determine its capacity. A fully charged battery should display 12.6 volts. If the reading decreases significantly then it's time to replace the battery.
To test the battery's capacity test the battery's capacity by placing an electrical load on it for a few minutes. This will take off about 1% of the surface charge. Then take another measurement of the voltage. The longer the battery is able to keep its voltage steady and the higher its capacity. It is ideal to maintain at or near 12 volts for several minutes.
Faulty Radio Signal
This is the most common reason for a key fob to stop sending signals to the car. This problem can be solved by replacing the battery. It is however important to purchase a battery that is the same voltage and size as the original.
Fobs can take a lot abuse, but they're also not indestructible. The battery buttons and contacts are brittle and can be bent or broken by rough usage.
Other transmitters or objects using the same frequency can disrupt the signal. A light control panel in your home, for example can interfere with key fobs that use the same bandwidth. This could interfere with the remote control of your car.
Afflicted OBDII Scan Tool
There are many reasons why scanner tools may not perform. Some are more complex than others.
Professional scan tools enable mechanics to observe the car's networks and run various self-tests. These are real time savers, however they are also extremely expensive, and out of the range of most DIYers.
If your OBD2 scanner isn't turning on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they're all fine there is a chance that a fuse has ruptured. This is the most frequent cause of scan tool failure. The simple fix is usually to replace the fuse that is blowing up.