How To Get More Results From Your Fiat 500 Keys

G28CarKeys are equipped with a transponder, which sends an indication from the fob to the car that allows it to unlock doors or start the motor. However, the key fob may be inoperable due to various 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

Replace the battery if your key fob has gone out of service. Choose a new button battery with identical in size, voltage and specification as the previous one.

If the key fob was exposed to water, for example a splash of rain or salt water at the beach, it will need to be cleaned before it is able to be used again. The trick is to use an old towel soaked in isopropyl or an electronic cleaner.

If the key fob has not been exposed to water, but it is still not working it could be due to an issue with the receiver module or an internal electronic chip. Reprogramming the keyfob using an OBDII scan may help in these cases.

Water Damage

You could have water damage to your key fob if it was submerged in a pool, puddle or washing machine. It is usually possible to fix it by taking the batteries off and cleaning the circuit board with ruby alcohol. It's best to allow the fob to dry completely before putting in a new battery.

You could have a damaged module in the event that your key fob stops working after replacing the battery or updating. You can find the instructions for reprogramming most vehicles' remote keys on YouTube, or consult your owner's manual. You could also try resetting the car's computer onboard using the OBDII scan tool.

Faulty Receiver Module

The key fob contains the chip that communicates the vehicle's system. If the chip is damaged, it can no longer be able to send or receive signals to the vehicle. This could be due to dropping the key fob, or by exposure to water. If the key fob stopped working after exposure to water it may be possible to fix the issue by cleaning the chip with isopropyl alcohol or electronic cleaner.

However, if the key fob continues to not respond after cleaning it, you can be sure that the module is faulty and will require to be replaced. A defective receiver can cause the key to not work. This is often caused by electromagnetic interference.

Faulty Electronic Chip

The chip inside your key fob is a vital function in the anti-theft security system in your car. It sends a signal to the immobiliser device in your car to inform it whether the key is legitimate. The car won't start in the event that the chip has been damaged.

A defective chip could be caused by interference from other objects, bad weather or transmitters located near your vehicle. In this scenario, you will need a new key fob.

Contacts with the battery may be damaged.

The battery contacts on the fob's key can be damaged through heavy use. If they're bent, or broken, the fob won't send any signals to the receiver modules in the vehicle.

Modern fobs feature rubber seals to keep out water. A splash of water or light rain should be fine, but submerging them in saltwater could harm the chip's electronic components.

The key fob houses chips that communicate with the vehicle's immobilizer to allow it to start it. This system makes use of cryptocoding systems in vehicles that are more modern, or the old red key system in older ones. If the chip is defective it must be replaced.

The 12 Volt Battery is faulty

A faulty battery can cause the key fob to cease to function. The car's system will not recognize the remote when this happens.

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

To determine the capacity of a battery, place an electrical load on it for a few minutes. This will take away about 1% of the surface charge. Then, measure the voltage again. The better the battery's capacity is, the longer it will keep its voltage. Ideal is to hold close to 12 volts for several minutes.

Problems with Radio Signal

This is the most frequent reason behind a key fob that ceases to send signals to the car. This issue can be resolved by replacing the battery. However, it is crucial to buy a new battery with the same voltage and size as the original one.

Fobs are subject to a lot of punishment, and aren't impervious to destruction. The battery buttons and contacts are delicate and are susceptible to being bent or damaged from rough usage.

Other transmitters or objects that use the same frequency can interfere with the signal. A light-control panel at your home, for example can interfere with key fobs that have the same frequency. This could cause interference with the remote control of your car.

Afflicted OBDII Scan Tool

There are many reasons scanners don't work. Some are more complex than others.

Professional scan tools enable a mechanic observe the car's network, and run various self-tests. These are great time savers, however they're also expensive and are out of the budget of many DIYers.

If your OBD2 scanner isn't turning on examine the voltage at terminal 16 (scan tool power) and terminal 4 (chassis ground). If these are both present it's likely that a fuse has failed. This is one of the most frequent causes of failures in the scan tool. It is generally easy to fix the issue by replacing the fuse that has blown.

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Pub: 25 Apr 2024 11:50 UTC
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