I am a licensed brake tech with abs experience but have been out of the biz more than 20 years.I've tried to stay familiar with systems and such. I am unfamiliar with the exact system u have but had this question.what exactly do u want to do and have done so far.do u just want to replace all the fluid as a maintenance job or was the system opened and got air in it.sometimes it's possible to mechanically trick the system.any difference in speed sensor values with brake pedal applied just enough for the brake switch it should trigger an event making the accumulater dump and charge just like an abs activation. I've never tried it with a vehicle raised and apply brake switch and spin just one wheel.the system sees zero speed and suddenly sees speed on one wheel while the brake switch says brakes are on it should trigger an event.I could be all wrong but hoped to help.