Fiat Panda Key Fob Replacement
Fiat Panda key fobs contain transponder chips that send an alert to your car to open the doors or start the engine. However, the fob can stop working due to a variety of causes.
A dead coin battery is the most common reason for the malfunction of a key fob. Other causes are water damage, the receiver module is defective and signal interference.
Dead Coin Battery
If the battery in your key fob is dead, the first thing to do is replace it. Use a button cell that has the same voltage, size and specifications as your previous one.
If the key fob was exposed to water, such as a splash of rain or salt water on the beach, it will have to be cleaned before it is able to be used again. The best way to do this is using the paper towel and soak it in isopropyl, or electronic cleaner.
If the key fob isn't working even though it is not exposed to water, it could be due to a problem in the receiver module, or even in the internal electronic chip. In these instances it is possible to re-programme the key fob with an OBDII scanner might aid.
Water Damage
There could be water damage to your key fob if it was submerged in a pool, puddle or washing machine. It's generally possible to fix it by taking out the batteries and cleaning the circuit board with ruby alcohol. It is recommended to allow the device to completely dry before installing 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. Reprogramming instructions are available for all vehicles' remote key fobs on YouTube or in your 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 which communicates with the vehicle's system. The chip will stop sending and receiving signals to the car when it is damaged. This can be caused by dropping the key fob or through exposure to water. If the key fob you have purchased has stopped functioning due to water exposure and you are unable to fix it if clean the chip with electronic cleaner or isopropylethanol.
If the key fob won't respond to cleaning, it's likely that the module is in an issue and should be replaced. A defective receiver can cause the key to not work. This is usually caused by electromagnetic interference.
A defective electronic chip
The electronic chip inside your key fob plays a crucial role in the anti-theft system of your vehicle. It sends a signal to the immobiliser unit inside your car to inform it whether the key is in fact valid. If the chip is damaged or broken, your car will not start.
A malfunctioning chip can be caused by interference from other objects, bad weather or transmitters located near your vehicle. In this case it is likely that a new fob would be needed.
Contacts for the battery that are damaged
The battery contacts of the key fob could be damaged by heavy usage. If G28 are bent, or damaged, the fob will not send any signals to receiver modules inside the vehicle.
Modern fobs have rubber seals that block out water. In the event of submerging them in water, even if it is just a light drizzle or splash could harm the chip's electronic components.
The key fob houses the chip that connects to the vehicle's immobilizer system to allow it to start. This system utilizes cryptocoding systems in the latest vehicles and the older red key system in older models. This chip will have to be replaced if defective.
Faulty 12 Volt Battery
A faulty battery may cause the key fob to function. If this happens, the car's computer system won't recognize that the remote is inside the vehicle.
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 falls dramatically then it's 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 1percent of the charges. Then, you can measure the voltage again. The better the battery's capacity and the longer it can keep its voltage. The ideal scenario is to keep it close to 12 volts several minutes.
Radio Signal Faulty Radio Signal
This is the most common cause of a key fob that stops sending signals to the car. The battery can be replaced to fix this issue. It is crucial to buy a battery with the same voltage and dimensions as the original.
Fobs take a lot of abuse, and they aren't indestructible. The battery buttons and contacts are brittle, so they can get bent or damaged from the force of.
A signal can also be impacted by other transmitters or objects that use the same frequency. A light-control panel at your home, for instance could interfere with key fobs that use the same bandwidth. This could interfere with your car's remote control.
Problems with OBDII Scan Tool
There are a variety of reasons why scanner tools may 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 can be real time savers, however they are also extremely expensive, and beyond the reach of most DIYers.
If your OBD2 scan tool won't power on, check voltage at terminals 16 (scantool power) and 4 (chassis earth). If these are both present it's possible that a fuse has been blown. This is the most frequent reason for failure of the scan tool. It is generally easy to fix the problem by replacing the fuse that was blown.