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 not function due to a variety of reasons.
A dead coin battery is the most common reason for a key fob malfunction. Look At This include water damages as well as a defective module and interference signals.
Dead Coin Battery
Replace the battery if the key fob is dead. Use a new button cell battery that has the same voltage, size, and specification like the previous one.
If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned prior to using it again. A paper towel soaked in alcohol or electronic cleaner will help.
If the key fob isn't working despite not being exposed water it could be due to a malfunction in the receiver module, or even in the internal electronic chip. In these instances it is possible to re-programme the key fob using an OBDII scanner can help.
Water Damage
If your key fob has taken immersed in a puddle or pool or gone down the wash machine, it could have some water damage. You can usually get it working again by removing the battery and scrubbing the circuit board with isopropyl alcohol. It's a good idea let the fob dry completely before putting in a new battery.
If your key fob isn't working, even after replacing the battery and programming it again, you might have a faulty receiver module. There are instructions for reprogramming most vehicles' remote keys on YouTube or consult the owner's manual. You could also try resetting the car's computer onboard using the OBDII scan tool.
Faulty Receiver Module
The key fob contains a chip that connects to the car's system. If the chip is damaged, it will be unable to longer transmit or receive signals to the vehicle. Dropping the key fob could cause this, as can exposure to water. If the key fob has stopped working after exposure to water, it may be possible to repair it by cleaning the chip using isopropyl alcohol, or electronic cleaner.
If the key fob won't respond to cleaning, it is possible that the module has an issue and must be replaced. A malfunctioning receiver could cause the key to stop working. This is typically caused by electromagnetic interference.
Faulty Electronic Chip
The chip inside your key fob plays an important function in the anti-theft security system of your car. It sends out a signal the immobiliser device in your vehicle to tell it whether or not the key is in fact valid. If the chip is damaged or broken, your vehicle will not start.
A faulty chip may also be caused by interference caused by objects, bad weather or transmitters located near your vehicle. In this scenario you'll need an entirely new key fob.
Contacts for the battery that are damaged
The battery contacts on the key fob are delicate and can get damaged through repeated use. If they're broken or bent, the fob won't send any signals to the receiver modules inside the car.
Modern fobs are designed with rubber seals in order to keep out water. In the event of submerging them in water, even if it's just an occasional drizzle or splash could damage the electronic chip.
The key fob comes with chip that communicates with the immobilizer system of the vehicle, allowing it to start it. It uses the old red keys for older vehicles or the cryptocoding system found in modern vehicles. If the chip is damaged and needs to be replaced.
Faulty 12 Volt Battery
A faulty battery can cause the key fob to cease to function. The car's computer will not recognize the remote if this occurs.
Before replacing the battery, test it using a the voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading drops dramatically, it's time to replace it.
To test the battery's capacity put an electrical load on it for a few minutes. This will remove approximately 1% of the charge on the surface. Then, you can measure the voltage again. The greater the battery's capacity, the longer it can keep its voltage. Ideal is to hold close to 12 volts for several minutes.
Faulty Radio Signal
This is the most common reason for the key fob not sending signals to the car. The issue can be fixed by replacing the battery. However, it is important to buy a new battery with the same voltage and size as the original one.
Fobs endure a lot of abuse, but they're also not indestructible. The battery contacts and buttons are delicate, so they can get bent or damaged by the force of.
A signal may also be disrupted by other objects or transmitters that use the same frequency. A light-control panel in your home, for example can interfere with key fobs using the same bandwidth. This could interfere with the remote control of your car.
Incorrect OBDII Scan Tool
There are a variety of reasons why scanners don't function. Some are more complex than others.
Professional scan tools allow a mechanic to observe the car's networks and run a variety of self-tests. These are real time savers, but they can be expensive, and out of the budget of many DIYers.
If your OBD2 scan tool won't power on, check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If they're both in good shape, it's likely that a fuse is blowing. This is the most frequent reason for failure of the scan tool. The easiest solution is to replace the fuse which has blown.