EEPROM, or E lectrically E rasable P rogrammable R ead- O nly M emory, is a type of device that allows you to store small chunks of data and retrieve it later even if the device has been power cycled. The memory in a car’s computer ECU that holds the programming to control the running of your engine is called EEPROM or electrically erasable programmable read only memory. I was with GM when we started "reprogramming" the EEPROMs on GEO's Storms in the very early 90's. OR, I could find someone who has done all that (like Michael), pay him or her for their hard-earned knowledge and time, potentially avoid making bad equipment purchases and fast-track my abilities to start…. You can make otherwise worthless parts a new life in a new car. Therefore the mileage of the original vehicle that the cluster was from will be displayed on the dash. “EEPROM today refers to data that identifies the ECU to the vehicle.” My first exposure to this was the Toyota and Lexus vehicles that had ECMs that became boat anchors when you lost the keys. Clone if you want a plug and play module. EEPROM Write: Stores values from an analog input to the EEPROM. I have a binder I keep on every ECU I do. For many of us the object is not to change the MAPs (Calibration Data) Our objective is to make a second hand part work like the original. National Institute for Automotive Service Excellence. Maybe at least we can gain an understanding for each other's views. You got me. Mainly the European and Asian variants. Culturally it is common for us to use terms that are not technically true but are commonly accepted. This is because as the data is copied to the ECU it is encrypted and changed. What I do know is if there is a buck to…, Hi Chris, Key Renew for many brands like Audi, BMW, MINI, Porsche, Nissan, Toyota, Fiat, Renault…etc. The main difference between EPROM chips and Programmable Read-Only Memory (PROM) chips is that the EPROM chips can be programmed more than one time, while PROM chips are not re-programmable. Why would one go to the hassle? All of them have a different method of cloning or getting to work with a different vehicle. You have and continue to pay your dues in our complex field. 200…, Chris, I hope the question is clear. Once the data has been read we need to create a course of action to create a prepared transponder that starts the vehicle or manipulate the data as needed to add our chip to the immobilizer. Body control? I especially…, It has nothing to do with saving a customer $, using salvage parts, working more greener, or giving yourself an "attaboy" because you were told you couldnt. Others are specific to the PCM itself. The mileage on most (Japanese) cars is stored on the instrument cluster itself, and not in the ECU. This saved customers $1K in the difference of cost. Thanks and please keep it up! If there is a mountain in front of us, we climb it. With all respect for Chris Jacob's argument above, the root of the argument for keeping private the processes you describe seems to be that it protects business interests of one class (those with certain information and capabilities) from erosion by the class of have-nots (ie everybody else), professional or…. As mentioned in earlier post, I am working on a class. Bosch has multiple versions of Engine ECUs. However, the main advantage of EEPROM is that one can program and erase its contents while it is still in the system board. A must have.You can’t avoid to get it if you want to do the car work seriously. How to know what EEPROM a car has? Tim i have to agree with you​.​We all know we can research or read a book or go to trade school or college for our profession​.​We also know there is no replacement for experience in this field.I think taking a class put on by Michael would put you ahead of the game experience wise because your going to learn all the mistakes he made without committing them yourself. Why would the first group even want to listen to…, You know I'm not much on spreading information like this content. An EEPROM programmer is a device which allows access to and rewriting of data that is stored on an EEPROM microchip. The EEPROM you will work with is near one of the two micro-controllers of the ECM. There are several software programs and chip preparation tools that each have varying abilities and can facilitate the preparation of these chips for the vehicle. Below is a picture to be used as a reference. Similar to using J2534, you will find that there are huge holes to fill. Like everything else we ask why, follow the money. The concept of reading the data from the existing module instead of replacing it is known as EEPROM (Electrically Erasable Programmable Read-Only Memory). Additionally replacing the ECMs required new modules. What is the difference between what Mike is trying to spread,compared to what all of the ECU and Module" rebuilders" on the market are already doing? Kind of like a liver transplant. Thanks When one spends 2 to 3 hours every evening studying automotive electronics, some of it actually sticks. Some handshakes are many bits of data. As modules become obsolete we are going to either have to scrap perfectly good vehicles or learn how to have modules repaired on a board level. EEPROM Read: Read the EEPROM and send its values to the computer. I respect your view on this. No OEM software required. A lot of modern microcontrollers – such as the ATmega328 – contain some built-in EEPROM, but that doesn't mean that you can't add more! Everyone can bring their own project and…, Lots of practical and useful info. Others you have to open the ECU and interact with a small integrated chip that stores the information. EEPROM work requires a tool (locksmith kit) which is capable of reading data from an eeprom and saving it to a file. The modules can then either be virginized or cloned. Some ECUs you can read out all memory locations, some selected locations and some MAPs only. Well some of it has. My objective would be to provide education so the path for others will be smoother. The chip can be read and written to using a serial programmer. You have to first downgrade the immobilizer, then read the ISN. Michael, excellent information, I have done some board level repairs in the past, damaged drivers, path repair, and cold solder rework. Transponder key is Growing up we called denim jeans Levis even though many companies made jeans with denim. The best situation is one where the entire ECU can be copied then pasted to the donor. (note: I'm not…, Yes. Even though the EEPROM is capable of more than 1-million programming changes, and is designed to last for hundreds-of-years, it can be sensitive to excessive heat and moisture. S4.2.3 New Lexus cars with Texas Crypto transponder (4D by Silca). The computer part that the EEPROM programmer is supplemental to is the EEPROM microchip, which is a shortening of Electrically Erasable Programmable Read-Only Memory. VAG ECU EEPROM Calculato is just a modification of an existing application which allows you now to load/read ECU bin files to calculate login and some other features w/o having the associated interface/hardware plugged in your computer. This would completely derail the thread if discussed here, but I wanted to say to YOU that I am of the belief that when I buy a car I should legally own ALL of it. This work has become known as eeprom work. I don't think I can convince anyone of my way of thinking. MED 17 variants are very popular in Ag equipment and European vehicles. Among these electronic parts, you will find the EEPROM, an electronic part that allows many modifications to improve the car’s engine. Sometimes when working with immobilizer EEPROMs, the ideal way of programming the EEPROM is by doing it while it is in the circuit, as removing it, programming, and resoldering it back to the circuit adds a bit more effort and time to complete the job. Newer Toyota/Lexus/Scion cars have a separate transponder ECU under the dashboard instead of having the EEPROM store key info in the ECU. If there is not a solution, I respectfully decline the job. The file is then passed to a "Transponder Programmer" the function of which is to use the eeprom data file to make the key. I have been more and more interested in learning electronics repair on cars lately. In other words, the eeprom doesn't have a address mapping per se, but portions can be read and worked with in ram. Soon the $500 investment becomes a gateway to bigger and bigger expenses. Engine control unit reading for tuning and cloning operation (will be added soon). We sent new calibration files within a cartridge for the Tech1/1A and later the Mastertech 3100. Some can be read "in circuit" and some have to be removed from the board and soldered to a test board. This in turn keeps you from programming your PCM with higher horsepower. The EEPROM and new PCM will the need to be programmed as a unit. It does not burn the original and the immobilizer does not know the difference. The reason is OEMs like GM,Ford, Chrysler, BMW, VW/Audi, Jaguar, Land Rover, Toyota/Lexus, Mercedes and others design parts that are one time use. As reverse engineering has become more astute, the OEMs have become more aggressive in protecting their assets. This immo-part can be very helpful: in many cases you have only to solder some vires to the PCB, and you can read/write the needed content. EEPROM in monitor performs two functions: - When a monitor is switch on it will copies all data or information from the EEPROM to the microprocessor. Never thought about plucking an eeprom off the board thought. I suppose there is no stopping it but what I will say is; The electronics engineers can and do implement EEPROM chips that will erase themselves if attempting to read. EEPROM Adapter is a hardware which was designed by XTOOL specialized on car models that need to remove the chip to read security code. More and more we are finding that many modules use an EEPROM to store VIN and Immobilizer data. Whenever the ignition is on and the PCM is energized, EEPROM self-tests are initiated. Thank You. XTOOL EEPROM Adapter is designed for X100 PRO /X200S / X300 Plus / X100 Pad Chip socket has 3 chip types: 3XXX, 25 (95) XXX and 24XXX Michael I personally find this area of automotive repair very interesting! Companies like Alienware have cracked many of the keys. To do this we need to remove the module from the car and locate the chip where the data is stored. The reference in the circuit board for the EEPROM chip is “IC1003“. This type of chip can be erased and reprogrammed using a strong, electronic signal. It's a long name for a small chip that holds bits of data code that can be rewritten and erased by an electrical charge, one byte at a time. This will make the key cutting easy or when the key is lost. We need mentors like you to keep us informed and motivated. Sorry to hit you with what I'm sure are simple questions for you, but this stuff is fascinating and doesn't seem like it's discussed all that often. Having a healthy debate on issues is an important part of society. Virginize if you plan on using OEM software to program. When I get one that I have to take the walk of shame back to the shop, I make sure I keep up to date on each tools progress. That's a pandoras box that was kicked open and you see drastic measure's being taking to curb the effects. This error message is only visible to WordPress admins, Advanced Automotive Key Generation – EEPROM. The way one can virginize the ECU is by looking for the IC900 EEPROM. Back in the day television and radio repair was a job people made money doing. Get the one that comes with remote control, EEPROM adapter, and free shipping like a pro. Repeat process with donor but program EEPROM with stored data. You would then install the ECU and marry keys to it. Once found you just set the clip on the EEPROM, select the vehicle and push the button. We really appreciate your experience and knowledge you share with us. Erasable Programmable Read-Only Memory (EPROM) refers to a type of computer chip that can hold a small amount of data in resident memory. Unlike EPROM chips, EEPROMs do not need to be removed from the computer to be modified. Some are static and common. We just want to live our lives without…, Mike, EEPROM (electrically erasable programmable read-only memory) is user-modifiable read-only memory that can be erased and reprogrammed (written to) repeatedly through the application of higher than normal electrical voltage. Information wants to be free. This is primarily VIN and Immobilizer Data. EEPROM - Electrically Erasable programmable read-only memory, is a type of non - volatile memory used in computers and other electronic devices to store relatively small amounts of data but allowing individual bytes to be erased and reprogrammed. The procedure is similar, though a hand-shaking procedure must be performed between the Transponder ECU and Engine Control Unit before key programming by shorting two wires on the OBDII port for 30 minutes. User could remove the chip from Immobiliser or dashboard and then read pin code via EEPROM. This latter work is what is known as eeprom work and what I plan to focus on. EPROMs are used in all kinds of devices, and now it has found its way to automobiles. Any work where you have to open up the ECU could be regarded as EEPROM work. I would be greatly interested in taking a class from you on this subject. 1 Answer I have a Honda Civic 2006. This memory can be programmed and reprogrammed electrically to be able to upgrade or change the programming that controls the engine functions. What other modules typically store data using EEPROM, clusters? However, lines like these: EEPROM stands for Electrically Erasable Programmable Read Only Memory, and is pronounced double-ee-prom or e-e-prom. Knowing what you are getting into becomes interesting. Then solder to test board. This is different from more standard types of read-only memory that are locked and not subject to any type of modification by the average user. How to know what EEPROM a car has? Finally the immobilizer is installed back in the vehicle and the car is ready to hit the streets of Portland once again. As an answer to who my trainer is, I am self taught. How to get started? BMW for instance uses an ISN code. Electronics became throw away as imports and cheap production became the…. Apple devices were the first to implement this feature to prevent independent repair facilities from performing repairs. So, when you say "EEPROM" obviously, I recollect different specific use cases from a different time. 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