Fiat Panda Key Fob Replacement
Fiat Panda key fobs contain a transponder chip which sends a signal to your car to open the doors or start the engine. However, the fob may stop working for several reasons.
A dead coin battery is the most frequent reason for a key fob malfunction. Other causes include water damage as well as a defective module and interference signals.
Dead Coin Battery
If the battery in your key fob has died, the first step is to replace it. Use a new button cell battery that has the same voltage, size, and specification as the old one.
If the key fob was exposed to water (such as saltwater or rain at the beach) it should be cleaned prior to being used again. The best method is to use an old towel soaked in isopropyl or electronic cleaner.
If the key fob hasn't been exposed to water, but remains inoperable it could be because of a problem with the receiver module or an internal electronic chip. Reprogramming the keyfob by using an OBDII scan may help in these instances.
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 by removing the batteries and cleaning the circuit board with rubbing alcohol. It is best to let the circuit board completely dry prior to installing the battery.
You could have a damaged module in the event that your remote stops working after replacing the battery or changing the programming. There are reprogramming guidelines for the majority of vehicles' remote key fobs on YouTube or in the owner's manual. You can also try resetting the car's onboard computer by using the OBDII scan tool.
Faulty Receiver Module
The key fob is equipped with an electronic chip that communicates with the car's system. This chip will stop sending and receiving signals to the car if damaged. Dropping the key fob can result in this, as can exposure to water. If the key fob you have purchased has stopped working due to exposure to water and you are unable fix the issue if you clean the chip using electronic cleaner or isopropylethanol.
However, if the key fob continues to not respond following cleaning, then it is likely that the component is damaged and needs to be replaced. A damaged receiver module may also cause the remote control key to stop working. This is usually due to electromagnetic interference.
Faulty Electronic Chip
The chip that is embedded in your key fob is a vital part of the anti-theft system in your car. It transmits a message to the immobiliser in your car to inform it that the key is valid. The car won't start if the chip is damaged.
A defective chip could be caused by interference from objects, bad weather or transmitters close to your vehicle. In this scenario it is likely that a new fob would be required.
Contacts of the battery may be damaged.
The battery contacts of the fob's battery can be damaged through heavy use. If they are bent or broken the fob will not send any signals to the receiver modules inside the car.
Modern fobs are designed with rubber seals to keep out water. A splash of water or light rain is fine However, submerging them in saltwater can cause damage to the electronic chip.
The key fob has an electronic chip that communicates with the immobilizer system of the vehicle to begin it. This system makes use of cryptocoding systems in vehicles that are more modern as well as the traditional red key system used in older models. If the chip is defective it must be replaced.
Faulty 12 Volt Battery
A faulty battery can cause the key fob to stop working. The car's computer will not recognize the remote if this occurs.
Before you replace the battery, test it by using a an voltmeter for determining its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly then it's time to replace it.
To test the battery's capacity test the battery's capacity by placing an electrical load on it for a couple of minutes. This will remove about 1% of the surface charge. Then, measure the voltage again. The greater the battery's capacity is, the longer it will maintain its voltage. Ideal is that it stays close to 12 volts during several minutes.
Faulty Radio Signal
This is the main reason for 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 choose a battery that has the same voltage and size as the original.
Fobs can take a lot punishment, and aren't impervious to destruction. The battery buttons and contacts are delicate, so they can get bent or broken with the force of.
A signal may also be impacted by other objects or transmitters that use the same frequency. A light-control panel at your home, for instance could interfere with key fobs that use the same frequency. This could cause interference with the remote control of your car.
Incorrect OBDII scan tool
There are many reasons why a scan tool could not work. Some are more complex than others.
Professional scan tools let mechanics to observe the car's network and run various self-tests. These tools can save time, but are costly and out of reach for most DIYers.
If your OBD2 scanner doesn't work, check the voltage on terminal 16 (scan tool power) and terminal 4 (chassis ground). If G28 are in good condition there is a chance that a fuse has blown. This is the most frequent reason for failure of the scan tool. It is usually simple to fix the issue by replacing the fuse that was blown.