• ECU Tool is a very useful functionality for extracting ISN from the DME/DDE of BMW vehicles. The procedure works by OBDII and by dump. Once the software is started you have the option to check the ECU, and read it by OBDII, it is a very quick process, and once the data flash is read, the software displays the ISN Codes. Screenshots from the procedure below:

Important notes

• The Advanced Info view is where the ISN of the DME/DDE, the ISN of the EGS and the operating hours are shown — see 12 ISN reading.

• To read a unit on bench, wire it as shown in 13 ECU Wiring diagrams.

• If the read stalls at 10%, see 17.7 Downgrading or ISN reading stops at 10%.