Fiat Panda Key Fob Replacement

fiat 500 spare key Panda keyfobs are equipped with a transponder that sends a signal from the fob to the car that allows it to unlock doors or start the motor. However, the fob may stop working due to a variety of causes.

The most commonly cited reason for key fob malfunction is an inoperable coin battery. Other causes include water damages, a faulty module, and interference signals.

Dead Coin Battery

If your key fob's battery has failed, the initial step is to replace it. Use a button cell battery that has the same voltage, size, and specification as your old 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 soaked with isopropyl alcohol or electronic cleaner can help.

If the key fob has not been exposed to water, but it is still not working it could be due to an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob by using an OBDII scan may help in these cases.

Water Damage

There could be water damage if your key fob was submerged in a pool, puddle or washing machine. It's usually possible to get it working again by removing the battery and scrubbing the circuit board with isopropyl alcohol. It's best to allow the device to completely dry before putting in the battery.

It could be that you have a defective module in the event that your key fob stops working after replacing the battery or reprogramming. You can find the instructions for the reprogramming of most remote keys on YouTube or refer to your owner's manual. You can also try resetting the car's onboard computer using the OBDII scan tool.

Faulty Receiver Module

The key fob's chip is a chip which communicates with the vehicle's system. This chip will stop sending and receiving signals to the car if it becomes damaged. This could be due to dropping the key fob or through exposure to water. If the key fob stopped working after exposure to water it could be possible to repair it by cleaning the chip using isopropyl alcohol or an electronic cleaner.

If the key fob is still unable to not respond after cleaning it it is likely that the module is faulty and will need to be replaced. A faulty receiver module can also cause the remote control key to stop functioning. This is usually due to electromagnetic interference.

Electronic chip that is malfunctioning

The chip that is embedded in the key fob is an important component of the anti-theft system in your car. It sends a message to the immobiliser in your car to tell it whether the key is genuine. Your car won't start if the chip is damaged.

A malfunctioning chip can be caused by interference from other objects, bad weather or transmitters near your vehicle. In this situation the replacement fob will be required.

Faulty battery contacts

The battery contacts inside the key fob are delicate and could be damaged by repeated use. If they are damaged or bent, the fob won't send any signals to the receiver modules in the car.

Modern fobs come with rubber seals to keep out water. Immersing them in water, even if it's only the slightest splash or drizzle could harm the chip's electronic circuit.

The key fob contains chips that communicate with the vehicle's immobilizer system to start it. It uses the old red keys for older vehicles as well as the cryptocoding system found in the latest vehicles. This chip needs to be changed if it is malfunctioning.

A faulty 12 Volt battery

A defective battery can cause the key fob to function. The car's system will not recognize the remote when this occurs.

Before you replace the battery, test it using a the voltmeter to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls dramatically, it is time to replace the battery.

To test the battery's power to determine its capacity, put an electric load on it for a few minutes. This will remove about 1% of the surface charge. Then, you can measure the voltage again. The longer the battery can hold its voltage more effectively, the greater its capacity. 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 typical reason for a key fob to stop sending signals to cars. This problem can be solved by replacing the battery. But, it is essential to purchase a battery that has the same size and voltage as the original.

Fobs are subject to a lot of abuse, but they're also not impervious to destruction. The battery buttons and the contacts are fragile and are susceptible to being bent or damaged from rough use.

Other transmitters or objects using the same frequency can also disrupt the signal. For example, a light-control panel in your home could send interference on the same frequency as key fobs use. This can interfere with your car's remote control.

Problems with 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 conduct a variety self-tests. These are real time savers, but they are also extremely expensive and are out of the range of most DIYers.

If your OBD2 scanner won't start, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If both are in good condition it could be that a fuse has blown. This is the most common reason for failures of the scanner. The simple fix is usually to replace the fuse which has blown.