Kia 2004.5 Spectra Service Technical Training page 182

2004.5 Spectra Technology
The slip of each rear wheel is calculated to determine
EBD OPERATION
ABSCM control of the rear wheel brake pressure.
During normal braking with no rear wheel slippage,
pressure from the master cylinder is passed directly
through the valves.
If the rear wheels exceeds predetermined slip rate, the
HECU sends a voltage signal to the rear wheel
solenoid valves to decrease pressure, which closes the
inlet valve(s) and blocks pressure from the master
cylinder. At the same time, the outlet valve is opened
and brake fluid passes from the wheel cylinder to the
reservoir, resulting in a pressure decrease.
Once wheel cylinder pressure is lowered, the HECU
closes the outlet valve and also keeps the inlet valve
closed. Pressure in the wheel cylinder is held or
maintained. When rear wheel slippage has been
suppressed, the HECU cuts voltage to the inlet
solenoid, once again allowing fluid under pressure to
enter the wheel cylinder.
Brakes
12