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Home >> BMW >> 2006 >> M5 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Self Diagnosis - Theory & Operation (S85) >> Engine Control Unit (ECU) >> Monitoring Function >> Test Non-Volatile data memory
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Test Non-Volatile data memory

After each restart, the ECU'S non-volatile data, consisting of adaptation data and error storage, is stored in flash memory and protected using a checksum.

During the control initialization phase the data is read from memory and check according to the checksum. If the checksum fails, the last 'good' non-volatile data's will be used.