Introduction To The Intermediate Guide In Fiat 500 Keys

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Fiat Panda key fobs contain transponder chips that send a signal to your car to open the doors and start the engine. However, the key fob may not function due to a variety of reasons.

The most frequent cause of key fob failure is a dead coin battery. Other causes include water damages or a damaged module and interference signals.

Dead Coin Battery

Replace the battery if your key fob has failed. Use a new button cell battery that has the same voltage, size and specification as the previous one.

If the key fob was exposed to water (such as saltwater or rain at the beach), it must be cleaned before being used again. The best solution is to use a paper towel that has been soaked in isopropyl or an electronic cleaner.

If the key fob is not working despite not being exposed water it could be due to a glitch in the receiver module, or even in the internal electronic chip. In these instances it is possible that reprogramming the key fob using an OBDII scanner might assist.

Water Damage

You might have water damage if your key fob was submerged in a pool, puddle or washing machine. It is usually possible to get it working again by getting rid of the battery and scrubbing the circuit board with isopropyl alcohol. It's best to allow the fob to dry completely before putting in a new battery.

If your key fob stopped working even after replacing the battery and reprogramming it, you may have a defective receiver module. There are reprogramming guidelines for most remote key fobs on YouTube or in the owner's guide. You can also reset the car's computer using the OBDII scanner tool.

Faulty Receiver Module

The key fob's chip is a chip that communicates with the vehicle's system. If this chip becomes damaged, it will be unable to longer transmit or receive signals to the vehicle. Dropping the key fob could result in this, as can water exposure. If the key fob is not working after water exposure it could be possible to fix the issue by cleaning the chip using isopropyl alcohol or an electronic cleaner.

If the key fob won't respond to cleaning, it is possible that the receiver module has a fault and needs to be replaced. A damaged receiver can cause the key to not work. This is typically caused by electromagnetic interference.

Faulty Electronic Chip

The electronic chip in your key fob is a vital element of the anti-theft device in your vehicle. It sends a signal to the immobiliser unit inside your car to determine whether or not the key is in fact valid. If the chip is damaged or broken, your vehicle will not start.

A malfunctioning chip can be caused by interference caused by objects, bad weather or transmitters located near your vehicle. In this scenario you'll require an entirely new key fob.

Contacts for the battery that are damaged

The battery contacts of the fob's key can be damaged due to heavy use. If they are bent or broken the fob will not be able to send any signals to the receiver modules inside the car.

Modern fobs feature rubber seals that block out water. A splash of water or a light rain is fine, but submerging them in salt water could cause damage to the chip's electronic components.

The key fob is equipped with an electronic chip that communicates with the vehicle's immobilizer in order to begin it. The system is based on the old red keys that were used in older vehicles as well as the cryptocoding system found in the latest vehicles. If the chip is damaged it must be replaced.

The 12 Volt Battery is faulty

A defective battery can cause the key fob not to work. If this happens the car's computer will not recognize that the remote is in the vehicle.

Before you replace the battery, you should test it with a the voltmeter to determine its capacity. A fully charged battery should read 12.6 volts. If the reading falls significantly it is time to replace the battery.

Place an electrical load for a few moments on the battery to determine its capacity. This will take away one percent of the surface charges. After that, measure the voltage. The longer a battery is able to keep its voltage steady and the higher its capacity. Ideal is that it stays at or near 12 volts for several minutes.

Radio Signal Faulty Radio Signal

This is the most frequent reason behind a key fob that stops sending signals to the car. The issue can be fixed by replacing the battery. It is crucial to purchase batteries that have the same voltage and dimensions as the original.

Fobs take a lot of abuse, but they're also not indestructible. Battery contacts and buttons can be damaged through rough handling.

Other objects or transmitters using the same frequency may also interfere with a signal. A light-control system in your home, for instance could interfere with key fobs using the same bandwidth. This could affect the remote control of your car.

Afflicted OBDII scan tool

There are a number of reasons why a scanner may not work. Certain are more complicated than others.

Professional scan tools let mechanics to monitor the car's network and perform various self-tests. These tools can help save time, but they're expensive and are out of reach for most DIYers.

If your OBD2 scan tool isn't turning on, check the voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're both in good shape the chances are that a fuse has blown. This is the most common reason for a scan tool to fail. It is often easy to fix the issue by replacing the fuse that was blown.