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Fiat Panda Key Fob replacement fiat 500 key

Fiat Panda key fobs contain a transponder chip which sends the signal to your vehicle to open the doors and start the engine. However, the fob may stop working for several reasons.

A dead coin battery is the most common cause of malfunctioning keys. Other causes are water damage or a damaged module and interference signals.

Dead Coin Battery

If your key fob battery has died, the first thing to do is replace it. Make use of a button cell battery with the same voltage, size, and specifications as the previous one.

If the key fob was exposed to water (such as rain or saltwater at the beach) it must be cleaned prior to using it again. A paper towel soaked in isopropyl alcohol or electronic cleaner will help.

If the key fob has not been exposed to water but still does not work, there may be a problem with the receiver module or an internal electronic chip. Reprogramming the keyfob through an OBDII scan may help in these cases.

Water Damage

It is possible to get water damage if your key fob was submerged in a pool, puddle or washing machine. It is usually possible to restore it's functionality by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It is a good idea to let the fob dry completely prior to installing a new battery.

If your key fob isn't working even after replacing the battery and reprogramming it, you may have a problem with the receiver module. Reprogramming instructions are available for most remote key fobs on YouTube or in 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 a chip that communicates with the vehicle's system. If this chip becomes damaged, it can no longer send and receive signals to the vehicle. This can be caused by dropping the key fob, or through exposure to water. If the key fob is not functioning after exposure to water, it is possible to fix it by cleaning the chip using isopropyl alcohol, or electronic cleaner.

However, if the key fob still does not respond after cleaning it you can be sure that the component is damaged and will need to be replaced. A defective receiver module could also cause the remote control key to stop working. This is usually caused by electromagnetic interference.

Faulty Electronic Chip

The electronic chip that is in your key fob plays a vital part in the anti-theft security system of your vehicle. It transmits a message the immobiliser inside your car that tells it that the key is valid. The car won't start in the event that the chip is damaged.

A faulty chip can also be caused by interference signals from other objects, bad weather conditions or transmitters operating on the same frequency as your vehicle. In this case an upgrade to the fob will be required.

Contacts for the battery that are defective

The battery contacts on a key fob can be damaged through heavy use. If they're damaged or bent, the fob won't send any signals to the receiver modules in the car.

Modern fobs are designed with rubber seals that keep out water. Submerging them in water even if it's only small splash or drizzle, can damage the chip's electronic components.

The key fob has chip that communicates with the immobilizer system of the vehicle in order to start it. The system relies on cryptocoding systems in newer vehicles as well as the traditional red key system for older ones. If the chip is defective it must be replaced.

Problems with 12 Volt Batteries

A damaged battery can cause the remote to stop working. The car's computer will not recognize the remote when this happens.

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 decreases significantly, it is time to replace the battery.

To test the battery's power test the battery's capacity by placing an electrical load on it for a few minutes. This will take away approximately 1 percent of the surface charge. After that, measure the voltage. The greater the battery's capacity is, the longer it will keep its voltage. Ideally, it will remain at or near 12 volts for several minutes.

The radio signal is not working properly. Radio Signal

This is the most frequent reason for a key fob to stop sending signals to vehicles. This problem can be solved by replacing the battery. But, it is essential to purchase a battery with the same voltage and size as the original.

Fobs are subject to a lot of abuse, but they're not impervious to destruction. Contacts and buttons on batteries can be damaged by rough handling.

A signal may also be affected by other transmitters or objects that use the same frequency. For example, a light-control panel in your home could send interference on the same frequency that key fobs utilize. This could affect your car's remote control.

Faulty OBDII Scan Tool

There are a number of reasons why a scan tool might not work. Certain are more complicated than others.

Professional scan tools enable mechanics to monitor the car's network and conduct a variety self-tests. These tools can save time, but they are costly and out of reach for the majority of DIYers.

If your OBD2 scanner doesn't work, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are OK, it's likely that a fuse has blown. This is among the most common causes of failures in the scan tool. The easiest fix is to replace the fuse that is blowing up.