![ecu flash tool ecu flash tool](https://sc02.alicdn.com/kf/H3765d4cc7d574eeda986484eb81b2ba3f/240548008/H3765d4cc7d574eeda986484eb81b2ba3f.jpg)
![ecu flash tool ecu flash tool](https://www.obd2eshop.com/upload/pro/13072319563121922.jpg)
Even though this may seem far less that what the master tools give, it is actually more than enough for most tuners. What you get with slave tools is the ability to use files which you have received from tuning files developers. However, master tools are far more expensive than slave tools. The master tool allows you to get a readout from the ECU and to edit it, so it is the only good way to develop good tuning files yourself, which is, in turn, the only way to become a tuning files supplier. Most of the mentioned manufacturers offer tools on two levels – master and slave. While the OBDs only read maps on the EPROMs, thus sometimes missing some of the info, the bootmode access allows for the complete backup of the ECU, reaching all of its nuances. This is where the two ways of accessing ECUs start to differ significantly. Even though vast majority of maps are in the EPROMs, some ECUs have valuable information in the processor as well. Modern ECUs have three data carriers – two EPROMs and a processor. However, reading information in these two ways does not provide the same results. The first ones are called OBD flashers (such as the Kess by Alientech) and the second ones are bootmode tools (Alientech’s Ktag, for example).
![ecu flash tool ecu flash tool](https://image.made-in-china.com/202f0j00wNPEljUySkos/Mpps-V13-02-ECU-Chip-Tuning-Tool-OBD-K-Can-Flasher-with-Multi-Language.jpg)
This automatically means that there are two different types of tuning tools available for accessing the two ports. The second one is via a port that is on the circuit board (BDM or JTAG), which is used for bootmode, or debugging mode tuning. The first one is through the OBD port that is usually used for diagnostics. There are two ways of accessing the ECU in order to reprogram it. Moreover, their quality, reliability and updates will easily make them cheaper in the long run. If you want to have a respected tuning business, you should most definitely acquire good tuning tools that will help you feel safe with what you are doing, but also provide insight into the latest models. They can only give you some of the functionality of the tuning tool they cloned and no updates whatsoever. They need to have enough processing abilities to access the latest ECU tricore technology and to be constantly updated, which is definitely something you will not get with cracked, or cloned tuning tools that are manufactured by some usually Chinese companies. There is a reason why they cost up to about 2,000 EUR per piece.