fiat 500 car key cover (information from Timeoftheworld) Panda Key Fob Replacement
fiat replacement key Panda keyfobs are equipped with a transponder which transmits signals from the fob to the car in order to unlock doors or turn on the motor. The fob can stop functioning due to a variety of reasons.
The most common cause of key fob failure is the battery of the coin is dead. Other causes include water damage, an inoperative receiver module, and signal interference.
Dead Coin Battery
Replace the battery if the key fob is dead. Use a brand new button battery that has the same size, voltage, and specification as the original.
If the key fob has been exposed to water, for example a splash of rain or salt water on the beach, it's going to need to be cleaned before it can be used again. The best solution is to use a paper towel soaked with isopropyl or electronic cleaner.
If the key fob hasn't been exposed to water but isn't working it could be an issue with the receiver module or an internal electronic chip. In these situations, reprogramming the key fob with an OBDII scanner might help.
Water Damage
If your key fob has gotten immersed in a puddle or pool or gone down the washing machine, you may have some water damage. You can usually be able to get it back up and running by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It is best to let the board completely dry prior to installing the battery.
It could be that you have a defective module in the event that your remote stops working after replacing the battery or updating. You can find information on reprogramming most vehicles' remote keys on YouTube or refer to the owner's manual. You can also try resetting the car's onboard computer with the OBDII scan tool.
Faulty Receiver Module
The key fob's chip is a chip that connects to the vehicle's system. This chip will stop sending and receiving signals to the car when it is damaged. Dropping the key fob can cause this, as could exposure to water. If the key fob is not working after exposure to water it could be possible to fix the issue by cleaning the chip with isopropyl alcohol or an electronic cleaner.
If the key fob doesn't respond to cleaning, it's possible that the receiver module has issues and needs to be replaced. A malfunctioning receiver could cause the key to not work. This is usually due to electromagnetic interference.
Faulty electronic chip
The electronic chip inside your key fob is a vital component of the anti-theft systems in 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, your vehicle will not start.
A defective chip can be caused by interference signals from other objects, bad weather conditions or transmitters operating on the same frequency close to your vehicle. In this case an upgrade to the fob will be required.
Contacts for the battery that are defective
The battery contacts in a key fob are very delicate and can get damaged when used for long periods of time. If they are bent, or damaged, the fob will not send any signals to receiver modules in the vehicle.
Modern fobs are made with rubber seals to keep out water. A splash of water or light rain should be fine, but submerging them in saltwater can damage the chip's electronic components.
The key fob is equipped with the chip that connects to the vehicle's immobilizer system to start it. This system uses crypto coding systems in newer vehicles, or the old red key system for older models. If the chip is damaged it must be replaced.
A faulty 12 Volt battery
A malfunctioning battery could cause the key fob to work. The car's computer won't recognize the remote if this occurs.
Test the battery with the help of a voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading drops dramatically then it's time to replace it.
To test a battery's capacity to determine its capacity, put an electric load on it for a couple of minutes. This will remove about 1 percent of the surface charge. Then, measure the voltage once more. The longer a battery is able to hold its voltage greater is its capacity. It is ideal to maintain at or near 12 volts for several minutes.
Problems with Radio Signal
This is the most typical reason for keys not sending signals to a car. The battery could be replaced to fix this issue. It is crucial to buy batteries that have the same dimensions and voltage as the original.
Fobs are subject to 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 by the force of.
Other transmitters or objects operating on the same frequency can disrupt the signal. For instance, a light control panel close to your home can send interference over the same bandwidth that key fobs utilize. This could interfere with your car's remote control.
Afflicted OBDII Scan Tool
There are a number of reasons why a scanner might not work. Some are more complicated than others.
Professional scan tools enable mechanics to look over the car's networks and run a variety of self-tests. These are real time-savers, but they are also extremely expensive, and out of the reach of most DIYers.
If your OBD2 scan tool won't power on, check voltage at the terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition it could be that a fuse has been blown. This is the main reason for a scan tool to fail. The easiest fix is to replace the blown fuse.


Dead Coin Battery
Replace the battery if the key fob is dead. Use a brand new button battery that has the same size, voltage, and specification as the original.
If the key fob has been exposed to water, for example a splash of rain or salt water on the beach, it's going to need to be cleaned before it can be used again. The best solution is to use a paper towel soaked with isopropyl or electronic cleaner.
If the key fob hasn't been exposed to water but isn't working it could be an issue with the receiver module or an internal electronic chip. In these situations, reprogramming the key fob with an OBDII scanner might help.
Water Damage
If your key fob has gotten immersed in a puddle or pool or gone down the washing machine, you may have some water damage. You can usually be able to get it back up and running by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It is best to let the board completely dry prior to installing the battery.
It could be that you have a defective module in the event that your remote stops working after replacing the battery or updating. You can find information on reprogramming most vehicles' remote keys on YouTube or refer to the owner's manual. You can also try resetting the car's onboard computer with the OBDII scan tool.
Faulty Receiver Module
The key fob's chip is a chip that connects to the vehicle's system. This chip will stop sending and receiving signals to the car when it is damaged. Dropping the key fob can cause this, as could exposure to water. If the key fob is not working after exposure to water it could be possible to fix the issue by cleaning the chip with isopropyl alcohol or an electronic cleaner.
If the key fob doesn't respond to cleaning, it's possible that the receiver module has issues and needs to be replaced. A malfunctioning receiver could cause the key to not work. This is usually due to electromagnetic interference.
Faulty electronic chip
The electronic chip inside your key fob is a vital component of the anti-theft systems in 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, your vehicle will not start.
A defective chip can be caused by interference signals from other objects, bad weather conditions or transmitters operating on the same frequency close to your vehicle. In this case an upgrade to the fob will be required.
Contacts for the battery that are defective
The battery contacts in a key fob are very delicate and can get damaged when used for long periods of time. If they are bent, or damaged, the fob will not send any signals to receiver modules in the vehicle.
Modern fobs are made with rubber seals to keep out water. A splash of water or light rain should be fine, but submerging them in saltwater can damage the chip's electronic components.
The key fob is equipped with the chip that connects to the vehicle's immobilizer system to start it. This system uses crypto coding systems in newer vehicles, or the old red key system for older models. If the chip is damaged it must be replaced.
A faulty 12 Volt battery
A malfunctioning battery could cause the key fob to work. The car's computer won't recognize the remote if this occurs.
Test the battery with the help of a voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading drops dramatically then it's time to replace it.
To test a battery's capacity to determine its capacity, put an electric load on it for a couple of minutes. This will remove about 1 percent of the surface charge. Then, measure the voltage once more. The longer a battery is able to hold its voltage greater is its capacity. It is ideal to maintain at or near 12 volts for several minutes.
Problems with Radio Signal
This is the most typical reason for keys not sending signals to a car. The battery could be replaced to fix this issue. It is crucial to buy batteries that have the same dimensions and voltage as the original.
Fobs are subject to 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 by the force of.
Other transmitters or objects operating on the same frequency can disrupt the signal. For instance, a light control panel close to your home can send interference over the same bandwidth that key fobs utilize. This could interfere with your car's remote control.
Afflicted OBDII Scan Tool
There are a number of reasons why a scanner might not work. Some are more complicated than others.
Professional scan tools enable mechanics to look over the car's networks and run a variety of self-tests. These are real time-savers, but they are also extremely expensive, and out of the reach of most DIYers.
If your OBD2 scan tool won't power on, check voltage at the terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition it could be that a fuse has been blown. This is the main reason for a scan tool to fail. The easiest fix is to replace the blown fuse.