Data Flow

Fig 1: Key Interlock Control Data Flow Chart

Courtesy of HYUNDAI MOTOR CO.

Key solenoid to the output of the ON KEY to make the subject does not fall. (If IGN 1 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, 0.9 sec ~ 1.5 sec for the 7 - 10V and the behavior, then the voltage 6 - 9V to maintain.

Fig 2: Key Interlock Control Timing Pattern
Courtesy of HYUNDAI MOTOR CO.

T1 : 0.9 ~ 1.5 sec