Patent ID: 8128531

Claim:
A key interlock control system, comprising: a parking position switch unit configured to detect whether a gearshift lever is located in a parking position; an ignition switch unit configured to be electrically connected to at least a power terminal for supplying electrical power to at least an electric or electronic component by manipulation of an ignition key; and a control unit configured to receive a signal from the parking position switch unit and a signal from the ignition switch unit and to determine whether the ignition key is to be locked by a key interlock unit based on the signals of the parking position switch unit and the ignition switch unit, wherein an IG1 terminal of the at least a power terminal includes a signal indicating that the ignition key is at either ON or START; wherein, when the signal of the IG1 is turned on and the gearshift lever is located in the parking position, the control unit controls the key interlock unit to unlock the ignition key, and wherein, in case that the gearshift lever is not located in the parking position and a state of the IG1 signal is changed from a state in which the IG1 signal is turned on to a state in which the IG1 signal is turned oft the control unit controls the key interlock unit to lock the ignition key.