Each modified file must be validated before it is re-flashed in the engine control unit, because otherwise the vehicle doesn’t ignite on and even if it does, you’ll get a diagnostic trouble code (e.g. P0601 -Internal Control Module e Memory CheckSum error).
Preparations:
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The process that validates a modified file is called Checksum correction. Thee Checksum is usually corrected by the same Chip-Tuning tool (e.g. KESSv2, Powergate, K-TAG, BDMpro) used to write files in the ECU.
If a memory chip programmer (e.g. Galep) is used to write the modified file, the Checksum correction is not made by the programmer, because that’s not a professional Chip-tuning device. It is necessary to use the ECM Titanium software with the right Checksum family.
If a Checksum correction is needed, it is very important to pay attention to t the message that ECM Titanium may display right after r that a Driver has been associated to an origginal file (Picture 28), because it warns that there is no Checksum available to validate the modified file.
If the tool used to re-flash the modified file (e.g. KESSv2, Powergate, K-TAG, BDMpro) automatically makes a Checksum m correction, you don’t need to correct the Checksum with ECM Titanium.
After pressing OK at the previous s message, the software redirects you to the m main window:
The Checksum box that appears in the previous image (Picture 29) shows in red the number 98, which corresponds to the number of the Checksum family suitable to correct the Checksum with ECM Titanium if the file was readd with a memory chip programmer (e.g. Galep)
If the Checksum family is red, it means that it is not available in the memory y of the ECM Titanium dongle.
To check or download a Checks sum family among those stored in the memo ory of ECM Titanium, simply follow these 3 steps:
1.Select Instruments from the menu bar in the main window of ECM Titanium.
2.Select Checksum from the drop-down menu.
3.Choose Available families.
The available families stored in the USB flash drive are green, while those i in red (Picture 30) can be downloaded from the web (using credits).
To download a Checksum family y from Alientech Internet Data Bank, it is ju ust necessary to follow two steps:
Select the number of the ddesired Checksum family (in red).
Click Download.
After the downloading, the Checksum family will appear in green (Picture 31).
After downloading the desired Checksum family from the web, it is necessary to reload the stock original file in the main window of the software and modify it again from the beginning. If, instead, you saved the modified file, you just need to reload the stock original file with its Driver and then load the modified file.
The Checksum correction is performed automatically when the modified file e is saved, without any additional step.