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Fiat Panda Key Fob Replacement
Fiat Panda key fobs contain a transponder chip that sends an alert to your car to open the doors and start the engine. However, the key fob may be inoperable due to various reasons.
A dead coin battery is the most frequent reason for key fob malfunctions. Other causes include water damage as well as a defective module and interference signals.
Dead Coin Battery
Replace the battery in case your key fob has gone out of service. Make use of a button cell battery that has the same voltage, size and specifications as your previous one.
If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it will need to be cleaned before it is able to be used again. A paper towel that has been soaked in isopropyl alcohol or electronic cleaner will be the solution.
If the key fob isn't working even though it is not exposed to water, it could be due a malfunction in the receiver module, or even in the internal electronic chip. In these cases it is possible that reprogramming the key fob using an OBDII scanner can aid.
Water Damage
If your key fob has taken submerged in a puddle or pool or even a trip through the washing machine, you might have some water damage. It is usually possible to get it back in working order by taking out the batteries and cleaning the circuit board using ruby alcohol. It is recommended to let the circuit board completely dry before putting in the battery.
If your key fob stopped working, even after replacing the battery and changing the program, you could have a malfunctioning receiver module. There are reprogramming guidelines for all vehicles' remote key fobs on YouTube or in the owner's manual. You could also try resetting the car's onboard computer with the OBDII scan tool.
Faulty Receiver Module
The key fob contains a chip that communicates with the car's system. This chip will stop sending and receiving signals to the car when it is damaged. This can be caused by dropping the key fob, or by exposure to water. If the key fob stops working after exposure to water it could be possible to fix it by cleaning the chip with isopropyl alcohol or an electronic cleaner.
If the key fob does not respond to cleaning, it's possible that the receiver module has an issue and must be replaced. A damaged receiver module may also cause the remote control key to not function. This is usually caused by electromagnetic interference.
Faulty Electronic Chip
The chip that is embedded in the key fob is a vital component of the anti-theft systems in your car. It sends a signal to the immobiliser unit in your car to determine whether or not the key is in fact valid. If the chip is damaged or broken, the car 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 as your car. In this case it is likely that a new fob would be needed.
Contacts of the battery may be damaged.
The battery contacts inside the key fob are delicate and can get damaged with hard usage. If they are bent, or broken, the fob won't send any signals to the receiver modules inside the vehicle.
Modern fobs are made with rubber seals to keep out water. In the event of submerging them in water, even if it's only an occasional drizzle or splash could harm the chip's electronic components.
The key fob houses a chip that communicates with the vehicle's immobilizer to allow it to allow it to start. It uses the old red keys for older vehicles as well as the cryptocoding system used in the latest vehicles. The chip must be replaced if it's faulty.
Faulty 12 Volt Battery
A malfunctioning battery could cause the key fob not to work. The car's computer will not recognize the remote if this occurs.
Test the battery using the help of a voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly it is time to replace the battery.
Place an electrical load for a short period of time on the battery to test its capacity. This will take off approximately 1 percent of the surface charge. Then take another measurement of the voltage. The longer a battery can hold its voltage more effectively, the greater its capacity. Ideal is to hold close to 12 volts during several minutes.
Problems with Radio Signal
This is the most frequent reason for the key fob not sending signals to cars. This issue can be resolved by replacing the battery. It is important to buy a battery with the same dimensions and voltage as the original.
Fobs endure a lot of abuse, but they're also not indestructible. Battery contacts and buttons can be damaged by rough handling.
Other transmitters or objects that use the same frequency can also disrupt a signal. For instance, a light control panel close to your home can send interference on the same frequency that key fobs use. This could affect the remote control of your car.
Afflicted OBDII scan tool
There are a variety of reasons why a scanner tool may not function. Certain are more complicated than others.
Professional scan tools let mechanics to monitor the car's network, and run various self-tests. These tools can save a lot of time, but are costly and out of reach for most DIYers.
If your OBD2 scan tool doesn't turn on, check voltage at the terminals 16 (scantool power) and 4 (chassis earth). If these are both present, it's likely that a fuse has blown. This is the most common reason for failures of the scanner. It is typically easy to fix the issue by replacing the fuse blowing up.
