An Alternative of Key Making—EEPROM

The current lock systems of cars are equipped with several digital features that solely aim to safeguard the vehicle. As a result, duplicating a key is a complicated task as each key is assigned a distinct code and necessitates programming for it to connect with the car. It is only when you lose your key or it malfunctions that you realize its significance.

A key can stop working due to either physical impairment or technical glitches, resulting in the car’s failure to identify its unique code, which then requires reprogramming. To avoid such situations, it is recommended to either possess a pre-coded key, which is not easily available, or consider the EEPROM as an alternative method to produce new keys as required.

What is EEPROM

EEPROM stands for Electrically Erasable Programmable Read-Only Memory. It is a non-volatile memory technology used in digital devices to store small amounts of data that can be accessed and modified electronically. EEPROMs are particularly useful in situations where data needs to be stored even when the power is turned off, such as in electronic devices that require persistent memory to store user settings or configuration data.

In the context of car keys, EEPROM is used as an alternative method to create new keys when required. The unique code of the original key is stored in the car’s computer system, and a new key is programmed with that code using specialized equipment. This process allows the car owner to have a spare key in case the original is lost or damaged without having to go through the complicated and time-consuming process of obtaining a pre-coded key from the car manufacturer.

How Does EEPROM Work

To perform EEPROM work, the first step is to remove the module from the vehicle and locate the chip that contains the data. Once located, the data can be read either in or out of the circuit.

The next step involves replacing the data with a fresh file, reading the EEPROM data to create an existing transponder chip, or adding values to the ROM for the transponder. Reading the chip in the circuit is generally the preferred method, but some programmers may cause other components in the immobilizer to power up, hindering the collection of EEPROM data. In such cases, the voltage supply may need to be lowered, the oscillator shorted out, or the chip removed to read it out of the circuit.

After reading the data, the next course of action is to program a transponder to start the vehicle or manipulate the data to add the chip to the immobilizer. Once the data is interpreted and saved back to the chip, a blank transponder can be prepared as needed.

Finally, the immobilizer can be reinstalled in the vehicle, and the car is ready to hit the road.

Vehicle Brands Which Require EEPROM

EEPROM programming is required for various vehicle brands and models, as modern car keys often contain chips that use EEPROM memory to store unique key codes. Some of the popular vehicle brands that require EEPROM programming for key duplication or replacement include:

However, this list is not exhaustive, and other vehicle brands may also require EEPROM programming for key duplication or replacement.

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Conclusion

EEPROM (Electrically Erasable Programmable Read-Only Memory) is an important technology that has revolutionized the way modern car keys are programmed and duplicated. It offers many benefits, including non-volatile memory, electronic read/write and erase, high reliability, small size, and cost-effectiveness, making it an ideal solution for storing small amounts of critical data in electronic devices. EEPROM programming is required for many popular vehicle brands and models for key duplication or replacement, and it is always recommended to consult a professional automotive locksmith or dealer for specific information about your vehicle’s key programming requirements. Overall, EEPROM has significantly improved the efficiency and convenience of car key programming, making it easier and more accessible for car owners to obtain duplicate or replacement keys.

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