I made SSM2 scanning software for SVX. Please find following website.
http://grove-design-service.com/ssm/ssm_svx_en.html
This software can monitor ECU,TCU,AirControlUnit,CruiseControlUnit and 4WS unit.
ECU's of SVX uses SSM2 protocol except cruise control unit. CC unit uses SSM1 protocol. You can find detail of SSM in the "Diagnostics and Datalogging for Subaru SVX" website if you want to know.