The ECU Tool is used to extract the ISN from BMW DME/DDE units. It works both via OBDII and from a dump, and it is the quickest route when all you need is the ISN code.
Required licences
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Hardware / cables
AVDI
Procedure
Connect the AVDI to the vehicle's OBDII socket and start the BMW/Mini software.
Open the "ECU Tool" function.
Use the unit check option to identify which DME/DDE is fitted.
Start the read via OBDII: the process is quick.
Alternatively, load a dump of the unit if you cannot work via OBDII.
Once the data flash has been read, the software displays the ISN codes on screen: note them down or copy them for later use.
Reference screenshots
Source: Manuale BMW/Mini, terza parte, cap. 15 (p.70) · ⏱ estimated time 15-30 min