Subaru LEGACY 2002 Quick Reference Index page 410

VEHICLE DYNAMICS CONTROL (VDC) SYSTEM
VDC
3. PRESSURE "HOLD" CONTROL WITH BRAKE PEDAL DEPRESSED
Only the inlet solenoid valve is energized. This means that the ports of the inlet solenoid valve,
outlet solenoid valve and suction solenoid valve are all closed except that of the cut solenoid valve.
In this state, the fluid pressure generated by the master cylinder is transmitted through the open
port of the cut solenoid valve to the inlet solenoid valve but not beyond the inlet solenoid valve
since the passage is blocked there. As the port of the outlet solenoid valve is also closed, the fluid
pressure in the wheel cylinder is held unreleased.
The pump is always operated whenever commanded by the VDCCM.
NOTE:
For simplicity of explanation, operation of the hydraulic control unit is represented by operation of
a single wheel circuit.
VDC-12