Here is a DIY guide on setting up BMW ICOM ISTA+ BMW v4.01.22 Voltage Control tool. Simulates voltage of connected interface.
Free download Voltage Control tool:
Voltage Control tool for standalone ISTA 4.01.22
https://mega.nz/#!z14HBKLT!qB3Jtki7NHsIlYDWfxCnT4bcbTAymWF91A6H6DtR-wo
Voltage Control tool (+ HW mod) for standalone ISTA 4.01.22
https://mega.nz/#!vhomDCbb!dAMLrOgFDKgdoMMQAKWwPz-KSvNsVlZ4Vmt0VkLI6Hc
password: beemerboy88
Installation instructions:
Unblock archive and extract files to \testergui\bin\release.
Create desktop shortcut for the voltage tool.
How to use:
Start ISTA software first (if problems try running as admin).
Run voltage control tool.
Notes:
Default voltage on startup is 14V.
Shutdown the control tool to restore real time voltage monitoring.