The Fiat 500 Keys Case Study You'll Never Forget

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fiat 500 electric key key fob programming (posteezy.com) Panda key fobs contain an transponder chip that transmits an alert to your car to open the doors or start the engine. However, the fob can stop working for several reasons.

The most frequent cause of key fob failure is a dead coin battery. Other causes include water damage, a faulty module, and interference signals.

Dead Coin Battery

If your key fob's battery is dead, the first step is to replace it. Use a new button cell battery that has the same size, voltage and specifications like the previous one.

If the key fob has been exposed to water, like 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 that has been soaked in isopropyl alcohol or electronic cleaner can help.

If the key fob hasn't been exposed to water, but isn't working it could be because of an issue with the receiver module or an internal electronic chip. In these cases, reprogramming the key fob using an OBDII scanner could assist.

Water Damage

If your key fob took an immersion in the pool or puddle, or taken a trip through the washing machine, you may have some water damage. It is usually possible to get it working by getting rid of the batteries and cleaning the circuit board with ruby alcohol. It's a good idea to allow the fob to dry completely before putting in a brand new battery.

If your key fob isn't working, even after replacing the battery and changing the program, you could have a problem with the receiver module. Reprogramming instructions are available for all vehicles' remote key fobs on YouTube or in your owner's guide. You can also reset your computer of your vehicle using the OBDII scanner tool.

Faulty Receiver Module

The key fob has the chip that communicates the vehicle's system. If this chip becomes damaged, it cannot longer transmit or receive signals to the vehicle. Dropping the key fob could cause this, as could water exposure. If your key fob isn't functioning due to exposure to water or water exposure, you might be able to fix it if you clean the chip using electronic cleaner or isopropylethanol.

However, if the key fob is still unable to not respond following cleaning, it is likely that the module is faulty and will need to be replaced. A malfunctioning receiver could cause the fiat key fob to cease to function. This is usually caused by electromagnetic interference.

Faulty Electronic Chip

The chip inside your key fob plays an important role in the anti-theft security system of your vehicle. It transmits a message the immobiliser in your car to determine whether the key is legitimate. If the chip is damaged or broken, your car will not start.

A faulty chip can also be caused by interference signals from other objects, bad weather conditions or transmitters operating on the same frequency in close proximity to your car. In this scenario, a new fob will be required.

Contacts with the battery may be damaged.

The battery contacts in the key fob are delicate and may be damaged through repeated use. If they're bent or damaged, the fob will not send any signals to receiver modules inside the vehicle.

Modern fobs are constructed with rubber seals in order to keep out water. In the event of submerging them in water, even if it's just small splash or drizzle could damage the electronic chip.

The key fob has chips that communicate with the vehicle's immobilizer to allow it to allow it to start. The system uses the old red keys that were used in older vehicles or the cryptocoding system that is used in newer cars. If this chip is faulty it must be replaced.

Problems with 12 Volt Batteries

A malfunctioning battery could cause the key fob to cease to function. The car's computer will not recognize the remote when this occurs.

Before you replace the battery, test it by using a the voltmeter to determine its capacity. A fully charged battery will read 12.6 volts. If the reading decreases significantly then it's time to replace the battery.

To test the battery's power, place an electrical load on it for a few minutes. This will take away 1% of the surface charges. Then, measure the voltage again. The longer the battery can keep its voltage steady more effectively, the greater its capacity. It is ideal to maintain close to 12 volts for several minutes.

Radio Signal Faulty Radio Signal

This is the most typical reason for the key fob to stop sending signals to vehicles. This issue can be resolved by replacing the battery. However, it is important to select a replacement battery with the same size and voltage as the original.

Fobs aren't indestructible and can withstand a lot. The battery contacts and buttons are delicate and are susceptible to being bent or broken by excessive use.

A signal can also be impacted by other objects or transmitters who use the same frequency. A light-control panel at your home, for example can interfere with key fobs that use the same bandwidth. This can interfere with the remote control of your car.

Incorrect OBDII scan tool

There are many reasons scanners don't function. Some are more complicated than others.

Professional scan tools enable a mechanic observe the car's network and perform various self-tests. These are real time savers, however they're also expensive, and beyond the budget of most DIYers.

If your OBD2 scanner isn't turning on make sure you check the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If they're both in good shape it's likely that a fuse has blown. This is the main reason for failure of the scan tool. The easiest fix is to replace the fuse which has blown.