Hold Mode-Brake Pressure Maintained

Fig 1: Illustrating Hold Mode-Brake Pressure Maintained

Courtesy of KIA MOTORS AMERICA, INC.

Operating condition 

Fig 2: Hold Mode-Brake Pressure Maintained Operation Chart

Courtesy of KIA MOTORS AMERICA, INC.

If wheel cylinder liquid pressure is decreased to the ultimate state, ABS ECU outputs the signal maintaining the liquid pressure in solenoid valve, so that solenoid valve IN is turned ON and OUT is turned OFF.

Then wheel cylinder liquid because solenoid valve In and out are both shut so that liquid channel is interrupted.