Got an ABS unit Bosch 0265200040 which has an internal valve/solenoid that's blocked or jammed. Long story short, apply brakes, front nearside stays locked up. Bench tested the ABS block and found there's no fluid return from the front N/S to the master cylinder even under pressure - unless you activate the front n/s solenoid.
I'm aware you can't fix these things, easier to get a replacement, but I was searching for a cutaway drawing of the fluid path and solenoid arrangements to explain what's happening - can't find jack - anyone have anything?
Just trying to understand what goes wrong with the pump module.
Paul
