Using VIDA establish, or fail to establish comms with the modules. If it cannot talk to the ABS module in any way, then you have either a catastrophic failure of the wiring (rare) or a power failure of the ABS module. The latter is my guess, but it’s only a guess.
I had a similar problem, and I cut the module open with a dremmal and then touched up all the solder joints with an iron.
That worked for two years and then I had to change the brushes in the pump motor; two different ways of doing the same thing which was getting an increased potential difference across the pump windings.
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