4. Increase Mode
If HECU determines there's no lock-up in the wheel, HECU cuts voltage to solenoid valve. So voltage is not supplied to each solenoid valve, brake fluid passes through the inlet valve to wheel cylinder, resulting in pressure increase.
SOLENOID VALVE REFERENCE CHART
| Solenoid | State | Valve | Passage | Pump motor |
|---|---|---|---|---|
| Inlet valve (NO) | OFF | Open | Master cylinder <=> Wheel cylinder | ON |
| Outlet valve (NC) | OFF | Close | Wheel cylinder <=> Reservoir |