Doug lives close enough to me that I invited him over to my garage, where he used Techstream to clear all codes (which left only C1345: requires initialization/calibration to clear). We were unable to access the second of two utility options for the Electronic Brake Control ("EBC"), which gave a "can't communicate" message. The first EBC-R option worked but all options except "fluid exchange" were greyed-out and unavailable.
Then, he followed
the repair manual's advice 2(a)(7): "Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / Reset Memory."
After performing EBC Reset Memory, the second EBC Utility option was then accessible, and we followed the repair manual's advice 2(b)(8): "Enter the following menus: Chassis / ABS/VSC/TRAC / Utility / ECB* Utility / Linear Valve Offset."
That allowed the initialization/calibration to proceed, and two minutes later after the procedure completed, he cycled the IG. The ABS/VSC etc. errors were cleared and the instrument cluster no longer had any abnormal lights lighted.
As the vehicle must not be in Ready mode, only turned on (HV contactors open), the DC-DC Converter was not powered, which left the 12v battery unsupported. Doing most anything non-trivial with the various ECUs demands that the voltage stay up, so I connected a battery charger while performing the init/cal.
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If you don't mind using an older version of Techstream, there's a recipe for a free software setup that runs under VirtualBox on most Win hosts.
https://forum.ih8mud.com/threads/how-to-techstream-in-5-minutes.1034923/
That recipe works well, though of course it's a bit slow, being a complete virtualized WinXP install. Still, slow isn't always a bad thing.
You'll still need to acquire a J2534 OBDII<->USB dongle, though. Available "everywhere" (ie Amazon, eBay, etc. for cheap ones).
