July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Engine Brake Control System Diagram

Fig 1: Engine Brake Control System Diagram

Courtesy of KIA MOTORS AMERICA, INC.

The operation of the low coast brake solenoid switches the low coast brake switch valve and controls the coupling and releasing of the low coast brake.
The low coast brake reducing valve controls the low coast brake coupling force.