Others you have to open the ECU and interact with a small integrated chip that stores the information. Then solder to test board. My first exposure to this was the Toyota and Lexus vehicles that had ECMs that became boat anchors when you lost the keys. Bosch has multiple versions of Engine ECUs. 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. 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. Some handshakes are many bits of data. The goal would be to give enough information that each student could either break the bank and go for the Gold or choose a more thrifty path to specialize. National Institute for Automotive Service Excellence. EEPROM which developed by XTOOL is a tool which could use to read chip that needs to be removed when reading IMMO pin code. will make Electrical and Electronics Engineers groan: The best situation is one where the entire ECU can be copied then pasted to the donor. Culturally it is common for us to use terms that are not technically true but are commonly accepted. I think culturally we come from a different place. I was with GM when we started "reprogramming" the EEPROMs on GEO's Storms in the very early 90's. How to get started? Remove EEPROM with hot air workstation. Soon the $500 investment becomes a gateway to bigger and bigger expenses. The reference in the circuit board for the EEPROM chip is “IC1003“. An example would be replacing coil drivers in a Ford Escape ECU. I am going to have to remember this post, another option to keep an older vehicle going a little longer. Newer Toyota/Lexus/Scion cars have a separate transponder ECU under the dashboard instead of having the EEPROM store key info in the ECU. We refer to all adhesive bandages as Band Aids. This takes special software. 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. Michael, excellent information, I have done some board level repairs in the past, damaged drivers, path repair, and cold solder rework. Erasable Programmable Read-Only Memory (EPROM) refers to a type of computer chip that can hold a small amount of data in resident memory. Mainly the European and Asian variants. What this presents is a front door that you have to get through before obtaining the data. We really appreciate your experience and knowledge you share with us. BMW for instance uses an ISN code. That way if I get a second opportunity on the same ECU, I can review the process. Transponder key is EPROMs are used in all kinds of devices, and now it has found its way to automobiles. Nowadays, modern cars are equipped with a multitude of electronic components designed to optimize their performance and use. I respect your view on this. Knowing what you are getting into becomes interesting. There are private forums dedicated to discovering the EEPROMs. 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. EEPROM today refers to data that identifies the ECU to the vehicle. 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. The chip can be read and written to using a serial programmer. EEPROM today refers to data that identifies the ECU to the vehicle. You have to first downgrade the immobilizer, then read the ISN. You got me. Information wants to be free. Why would the first group even want to listen to…, You know I'm not much on spreading information like this content. In order to use second hand parts, you have to be creative. The mileage on most (Japanese) cars is stored on the instrument cluster itself, and not in the ECU. S4.2.3 New Lexus cars with Texas Crypto transponder (4D by Silca). 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…. 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…. A must have.You can’t avoid to get it if you want to do the car work seriously. This is primarily VIN and Immobilizer Data. 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. 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. This is because as the data is copied to the ECU it is encrypted and changed. 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. EEPROM Adapter is a hardware which was designed by XTOOL specialized on car models that need to remove the chip to read security code. We all contribute as well as glean information. 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. Kind of like a liver transplant. Users can remove code chip by himself from vehicle anti-theft case,dashboard and other code saving control unit and read code by eeprom adapter. One can start with just a soldering iron, hot air workstation and a chip programmer. Never thought about plucking an eeprom off the board thought. They are not programmable with OEM tools. Electrically erasable programmable read-only memory (EEPROM) chips are metal oxide semiconductor computer chips that are used on a circuit board. 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. 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. All of them have a different method of cloning or getting to work with a different vehicle. It does not require the physical removal of the memory chip from its socket. As mentioned in earlier post, I am working on a class. Companies like Alienware have cracked many of the keys. Good for EEPROMs, MCUs, has a good Immo-content. Nowadays there are tools like the Auto Pro Pad and iM608 that also can address the Toyota issue. Back in the day television and radio repair was a job people made money doing. Key Renew for many brands like Audi, BMW, MINI, Porsche, Nissan, Toyota, Fiat, Renault…etc. Thanks Some can be read "in circuit" and some have to be removed from the board and soldered to a test board. It's just what we do. You knock, and the MCU asks you a question in the form of HEX code, Ox67 (made up data) Your tool will answer, Ox75 Ox99 (also made up) The MCU will either reject your request or let you in. 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. “EEPROM today refers to data that identifies the ECU to the vehicle.” How to know what EEPROM a car has? No OEM software required. If it helps the specific ECU is a Bosch Motronic 7.8 it has 2 Infineon C167xx processors (not sure the exact variant yet) and 800BB (1MB) flash and 95320 (32Kbit) eeprom. This in turn keeps you from programming your PCM with higher horsepower. Craig. More and more we are finding that many modules use an EEPROM to store VIN and Immobilizer data. In a word, the best car key programmer is a magical device and a vital kit for a modern car safety system. Website Designed By One Plum Design, As an automotive locksmith we need to be able to identify these different types of systems, know how they operate and what tools are needed to reprogram them. More and more technicians are realizing that the OEMs have been making our life difficult when exchanging modules. When dealing with EEPROMs there are different ways to read and write them. Virginize if you plan on using OEM software to program. This is great, Michael. This latter work is what is known as eeprom work and what I plan to focus on. 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