Hello,
This will be my first post. So, I recently found Phil's website "Diagnostics and Datalogging for Subaru SVX". And, I made software for windows PC base on information in his website.
He told me he wished it was 20 years ago, but if you're interested, please try it.
It can communicate with the ECU's in SVX and make information into graph in real time.
I hope it helps someone.
http://grove-design-service.com/ssm/ssm_svx_en.html