![]() The Infineon C167 processor used in the MS42 and MS43 ECU has an on-chip bootstrap loader which allows a custom programming routine to be uploaded to RAM which bypasses everything on the EEPROM.Īs the programming routine is uploaded into RAM and is entirely independent from the code on the EEPROM the boot mode programming softwares has full access to the whole EEPROM in the ECU, Most OBD programming software automatically corrects checksums when writing but double check that the software you are using has this functionality otherwise you must correct the checksums manually. It is recommended to always start with performing a full read of the ECU so that you have a backup that can be restored if anything goes wrong. 4: After connection is successful you can read and write to the ECU. ![]()
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March 2023
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