Data Flow

Fig 1: Key Interlock Control Data Flow Diagram

Courtesy of KIA MOTORS AMERICA, INC.

Key solenoid to the output of the ON KEY to make the subject does not fall. (If IGN1 ON or ACC subject to the key Interlock switch input is OFF.)
In addition to the above conditions, the KEY OFF key solenoid output to fall out, to make conditions.
Key solenoid output OFF -> ON operation, 0.9sec ~ 1.5sec for the 7 - 10V and the behavior, then the voltage 6 - 9V to maintain.

Fig 2: ACC, Ignition 1, Key Interlock Switch And Solenoid Blinking Pattern
Courtesy of KIA MOTORS AMERICA, INC.

T1: 0.9 ~ 1.5sec