Two files from the same memory device can look different before anyone has deliberately changed the data. When a 93-series EEPROM is involved, the reading setup deserves a place in the record alongside the file itself.
Bytes and words describe how data is organised
ST’s M93Cx6 automotive device documentation describes memory that can be organised as 8-bit bytes or 16-bit words. It uses the MICROWIRE interface. The exact device marking and the selected organisation therefore matter when interpreting a read.
That does not mean every file mismatch is caused by x8 or x16 settings. It means a comparison is incomplete if nobody knows how each file was obtained. File size alone is not a reliable description of the reading method.
Preserve the first record
For a garage requesting data recovery, retain the original unedited file and record the device marking, tool, selected device profile and organisation. Label later reads separately. Note whether the component was read on the board or removed, and whether any write operation had already been attempted.
If the workshop has compared repeat reads, include the result rather than describing the file simply as good. Also explain the vehicle symptom that led to the memory being examined. A file comparison and a functioning vehicle are different forms of evidence.
Do not fix a mismatch by guessing
Changing file layout or writing a donor file without understanding the device can destroy the useful original evidence. A replacement chip also needs the correct electrical and memory characteristics; matching the package shape is not enough.
This is a data-preservation guide, not an instruction to alter immobiliser identities, mileage or restraint-system records. The supported repair must respect the vehicle’s configuration and security requirements.
Asking for module-data support
Contact AXION before sending files or removing components. Include the module part number and a description of the failed operation. We will agree an appropriate transfer method and check whether module data recovery is supported for that unit.
Keep the original module and any unmodified reads until the repair outcome has been established. They can be important when a later comparison raises questions about what changed.