Normal Mode

In the normal driving condition, TC valve (normally open) is the passage between the master cylinder and the each caliper.
When brake pedal is applied, brake pressure is delivered to the caliper via NO-TC valve and all solenoid valves inside the hydraulic unit are deactivated.
In case of TCS malfunction, it does not affect brake operation.

Fig 1: BTCS Normal Mode State Chart

Courtesy of KIA MOTORS AMERICA, INC.

Fig 2: BTCS Normal Mode State Diagram

Courtesy of KIA MOTORS AMERICA, INC.