Fiat Panda Key Fob Replacement
Fiat Panda keyfobs are equipped with a transponder that transmits a signal from the fob to the car that allows it to unlock doors or turn on the motor. However, the fob may stop working due to a variety of causes.
A dead coin battery is the most frequent reason for key fob malfunctions. Other causes include water damage, malfunctioning receiver modules and signal interference.
Dead Coin Battery
If your key fob's battery has gone out of service, the first 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 has been exposed to water, such as a splash of rain or salt water at the beach, it's going to need to be cleaned before it can be used again. A paper towel soaked in isopropyl alcohol or electronic cleaner will do the trick.
If the key fob isn't working even though it is not exposed to water it could be due a malfunction in the receiver module, or even in the internal electronic chip. In these situations it is possible that reprogramming the key fob with an OBDII scanner can assist.
Water Damage
If your key fob's battery has taken submerged in a pool or puddle, or taken a trip through the washing machine, you may have some water damage. It's possible to get it working by taking out the batteries and cleaning the circuit board using ruby alcohol. It's best to allow the fob to dry completely before putting in a brand new battery.
You could have a damaged 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 the owner's guide. You can also try resetting the car's onboard computer with the OBDII scan tool.
Faulty Receiver Module
The key fob's chip is the chip that communicates the vehicle's system. The chip will stop sending and receiving signals to the car when it is damaged. The key fob being dropped can cause this, as can exposure to water. If your key fob has stopped functioning due to exposure to water and you are unable to fix it by attempting to clean the chip using electronic cleaner or isopropylethanol.
If the key fob doesn't respond to cleaning, it is possible that the module has an issue and must be replaced. A malfunctioning receiver module could also cause the remote control key to stop functioning. This usually happens due to electromagnetic interference.
Electronic chip that is malfunctioning
The electronic chip that is in your key fob is a vital function in the anti-theft security system of your car. It sends a message to the immobiliser in your car that tells it that the key is valid. If the chip is damaged or broken, your vehicle will not start.
A malfunctioning chip can be caused by interference from other objects, bad weather or transmitters close to your vehicle. In this situation the replacement fob will be needed.
Contacts of the battery may be damaged.
The battery contacts on the key fob are delicate and can get damaged when used for long periods of time. If G28 are bent, or damaged, the fob will not transmit any signals to receiver modules in the vehicle.
Modern fobs are equipped with rubber seals that block out water. In the event of submerging them in water, even if it's only a light drizzle or splash could damage the chip's electronic circuit.
The key fob is equipped with an embedded chip that communicates to the immobilizer system of the vehicle in order to start it. This system uses crypto coding systems in the latest vehicles and the older red key system in older models. If the chip is damaged and needs to be replaced.
Faulty 12 Volt Battery
A faulty battery can cause the key fob to cease working. When this happens, the car's computer system won't recognize that the remote is inside the vehicle.
Before you replace the battery, test it by using a the voltmeter to determine its capacity. A fully charged battery will display 12.6 volts. If the reading falls significantly then it's time to replace the battery.
Place an electrical load for a few seconds on the battery to determine its capacity. This will take off about 1% of the charge on the surface. Then measure the voltage again. The greater the battery's capacity and the longer it can maintain its voltage. Ideal is to hold at or near 12 volts for several minutes.
Problems with Radio Signal
This is the main reason for a keyfob that ceases to send signals to the car. The battery could be replaced to fix this problem. It is crucial to purchase an identical battery voltage and dimensions as the original.
Fobs take a lot of abuse, but they're also not indestructible. The battery buttons and contacts are brittle which means they could be bent or damaged by the force of.
A signal may also be affected by other transmitters or objects who use the same frequency. For instance, a light-control panel close to your home can transmit interference on the same frequency that key fobs utilize. This can interfere with the remote control of your car.
Faulty OBDII Scan Tool
There are many reasons why scanners may not function. Some are more complicated than others.
Professional scan tools let mechanics to look over the car's network, and run various self-tests. These tools can save time, but are expensive and out of reach for the majority of DIYers.
If your OBD2 scan tool fails to turn on, make sure you check the voltage at the terminals 16 (scantool power) and 4 (chassis earth). If both are in good condition, a fuse may have been blown. This is the most common reason for a scan tool to fail. The easiest fix is to replace the fuse that has been blown.