Troubleshooting Audi A4 B6: Error 00301, ABS Return Flow Pump V39 - Brake Fluid Leak & Motor Issues

Red exclamation mark + ABS + ASR and error 00301 - ABS return flow pump V39 appears in VAG. After resetting, it does not appear until the brake is pressed while driving.
I did some internet searches. It turns out that the error is with the v39 pump motor. I was able to find information that some of them took out the motor and cleaned it because it was seized, or changed the brushes in it.
Maybe someone has info, can it be easily pulled out? My point is whether brake fluid will leak out after disconnecting from the unit.



I was also thinking about getting to the motor contacts by unscrewing the controller (marked -2 in the picture) and giving it a short time to see if it is spinning. Only the stick knows what the control voltage is there, whether the 12V or the driver lowers it somehow.
Are there any relays from the ABS pump control in B6? I know there were in earlier models. But I can't find anything about the A4 B6. Perhaps they are already integrated in the controller? Because all control is via CAN.
Thanks in advance for your help and suggestions.

It is BOSCH 5.7 version, Driver 8E0614517

Check the power. The fuses for these thick wires are under the steering wheel. You have to unscrew the housing above the pedals.

There is indeed a fuse above the driver's legs. I'll check tomorrow. I analyzed the schematic from ELSA and it comes out that there are 3 power supplies. I checked the fuses from the box, I had the one above the driver's legs. Thanks for the point. But it turns out that there are no relays and the pump's motor is already controlled by the controller.

I was able to create this description for BOSCH 5.7:

The problem has been resolved. However, this is the lack of power. The nut holding the power cables above the 50A fuse unscrewed and the wires popped out of the mounting bolt. I gave the second self-monitoring one and I hope the problem won't repeat itself again.

Photo of the fuse and wires: