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fiat car keys Panda Key Fob replacement key for fiat ducato van

fiat 500 Keys Panda key fobs contain a transponder chip which sends signals to your car to open the doors and start the engine. However, the fob could not function due to a variety of reasons.

The most frequent cause of key fob failure is a dead coin battery. Other causes are water damage, a faulty module, and interference signals.

Dead Coin Battery

If your key fob's battery has died, the first step is to replace it. Use a button cell battery that has the same voltage, size, and specifications as the previous one.

If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it's going to need to be cleaned before it is able to be used again. The best method is to use the paper towel and soak it in isopropyl or an electronic cleaner.

If the key fob has not been exposed to water but it is still not working it could be due to a problem with the receiver module or an internal electronic chip. In these instances, reprogramming the key fob using an OBDII scanner could help.

Water Damage

If your key fob has taken submerged in a pool or puddle, or taken a trip through the washing machine, you could be suffering some water damage. It is usually possible to get it back to working by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It is recommended to let the board completely dry prior to installing a battery.

If your replacement fiat key fob fob has stopped working even after replacing the battery and reconfiguring it, you may have a defective receiver module. There are reprogramming guidelines for the majority of vehicles' remote key fobs on YouTube or in the owner's guide. You can also reset your car's computer using the OBDII scanner tool.

Faulty Receiver Module

The key fob is equipped with a chip that communicates with the vehicle's system. The chip will stop sending and receiving signals to the car if damaged. This could be due to dropping the key fob or by exposure to water. If your key fob stopped functioning due to exposure to water and you are unable fix the issue if you clean the chip using electronic cleaner or isopropyl alcohol.

However, if the key fob still does not respond even after cleaning it then it is likely that the module is defective and will require to be replaced. A malfunctioning receiver could cause the key to stop working. This is usually due to electromagnetic interference.

Faulty Electronic Chip

The electronic chip that is in your key fob is a vital function in the anti-theft security system of your vehicle. It sends a signal the immobiliser device in your car to determine whether the key is valid. Your car won't start if the chip is damaged.

A faulty chip can also be caused by interference signals from objects or weather conditions that are bad, or transmitters on the same frequency near your car. In this case an upgrade to the fob will be needed.

Faulty battery contacts

The battery contacts of the key fob could be damaged due to heavy use. If they're bent, or damaged, the fob will not send any signals to receiver modules in the vehicle.

Modern fobs come with rubber seals to keep out water. A splash of water or a light rain should be fine but submerging them into saltwater can damage the electronic chip.

The key fob is equipped with chip that communicates with the immobilizer system of the vehicle, allowing it to start it. The system relies on cryptocoding systems in vehicles that are more modern or the red key system for older ones. If the chip is not working properly it must be replaced.

Poor 12 Volt Battery

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

Test the battery using the voltmeter before replacing it to determine its capacity. A fully charged battery will display 12.6 volts. If the reading decreases significantly it's time to change it.

To determine the capacity of a battery to determine its capacity, put an electric load on it for a couple of minutes. This will remove 1% of the surface charges. Then, test the voltage again. The greater the battery's capacity, the longer it can keep its voltage. Ideally, it will remain at 12 volts or less for several minutes.

Problems with Radio Signal

This is the most frequent reason behind a key fob that ceases to send signals to the car. This problem can be solved by replacing the battery. It is however important to purchase a battery with the same voltage and size as the original.

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

A signal can also be affected by other transmitters or objects that use the same frequency. For instance, a light control panel close to your home can transmit interference using the same frequency that key fobs utilize. This could affect your car's remote control.

Faulty OBDII Scan Tool

There are many reasons scanners may not function. Some are more complex than others.

Professional scan tools permit mechanics to observe the car's networks and run a variety of self-tests. These tools can help save time, but are expensive and out of reach for the majority of DIYers.

If your OBD2 scanner isn't turning on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they are all OK the fuse could have blown. This is the most common reason for failure of the scan tool. The easiest fix is to replace the blown fuse.