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Fiat Panda Key Fob Replacement

fiat 500 locked keys in car Panda keyfobs are equipped with a transponder that sends signals from the fob to the car in order to unlock doors or turn on the motor. However, the fob can stop working due to a variety of causes.

A dead battery for the coin is the most common cause of the malfunction of a key fob. Other causes are water damage, the receiver module is defective, and signal interference.

Dead Coin Battery

Replace the battery if your key fob has failed. Use a new button cell battery that is exactly the same size, voltage, and specification as the old one.

If the key fob has been exposed to water, such as a splash of rain or salt water on the beach, it needs to be cleaned before it is able to be used again. A paper towel soaked in isopropyl alcohol or electronic cleaner can work wonders.

If the key fob doesn't working despite not being exposed to water it could be due to a glitch in the receiver module, or even in the internal electronic chip. Reprogramming the keyfob with an OBDII scan can help in these instances.

Water Damage

If your key fob has taken a bath in the puddle or pool or even a trip down the washing machine, you could be suffering some water damage. It is usually possible to restore it's functionality by taking the battery off and cleaning the circuit board with isopropyl alcohol. It's a good idea to allow the fob to dry completely prior to installing a new battery.

It could be that you have a defective module when your key fob ceases working after replacing the battery or updating. You can find information on changing the programming of most remote keys on YouTube, workshop or consult your owner's manual. You can also reset your car's computer using the OBDII scanner tool.

Faulty Receiver Module

The key fob's chip is a chip that connects to the vehicle's system. If the chip is damaged, it cannot longer transmit and receive signals to the vehicle. This can be caused by dropping the key fob or due to exposure to water. If your key fob has stopped functioning due to water exposure it is possible to fix it if you clean the chip using electronic cleaner or isopropyl alcohol.

However, if the key fob continues to not respond following cleaning, it is likely that the component is damaged and needs to be replaced. A faulty receiver module can also cause the remote control key to cease functioning. This is often caused by electromagnetic interference.

Faulty Electronic Chip

The electronic chip that is in your key fob is a vital role in the anti-theft system of your vehicle. It sends a signal to the immobiliser inside your car that tells it whether the key is genuine. Your car won't start when the chip is damaged.

A faulty chip may also be caused by interference from other objects, weather conditions or transmitters in the vicinity of your vehicle. In this scenario you'll need an entirely new key fob.

Faulty Battery Contacts

The battery contacts on a key fob can be damaged by heavy usage. If they're bent or damaged, the fob will not transmit any signals to receiver modules in the vehicle.

Modern fobs are designed with rubber seals that keep out water. Submerging them in water even if it's only a light drizzle or splash could harm the chip's electronic circuit.

The key fob is equipped with chips that communicate with the vehicle's immobilizer system to begin it. The system uses the old red keys in older vehicles or the crypto coding system in newer vehicles. If the chip is damaged, it will need to be replaced.

A faulty 12 Volt battery

A malfunctioning battery could cause the key fob to stop working. The car's computer may not recognize the remote if this happens.

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 drops significantly then it's time to replace the battery.

To test a battery's capacity, place an electrical load on it for a couple of minutes. This will take off approximately 1% of the surface charge. Then take another measurement of the voltage. The longer the battery can keep its voltage steady greater is its capacity. It is ideal to maintain close to 12 volts during several minutes.

Radio Signal Faulty Radio Signal

This is the most common reason for the key fob not sending signals to a car. This issue can be resolved by replacing the battery. It is crucial to purchase a battery that has the same dimensions and voltage as the original.

Fobs can take a lot punishment, and aren't impervious to destruction. The battery buttons and the contacts are fragile, so they can get bent or workshop broken with rough usage.

Other transmitters or objects using the same frequency can also disrupt the signal. For instance, a light-control panel that is near your home could transmit interference on the same bandwidth that key fobs utilize. This could cause interference with the remote control of your car.

The tool is not working properly. OBDII scan tool

There are many reasons why a scanner could not function. Some are more complex than others.

Professional scan tools permit mechanics to look over the car's networks and conduct a variety self-tests. These are great time-savers, but they're also expensive and are out of the budget of most DIYers.

If your OBD2 scanner isn't turning on Check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If they're all fine the fuse could have failed. This is one of the most common causes of a scan tool failing. The easiest solution is to replace the blown fuse.