Patent ID: 7515038

Claim:
A system for warning against forgetting to pull out an information recording medium, said system comprising: a battery that is installed on a vehicle; a navigation unit that is installed on said vehicle; an on-board radio unit that is installed on said vehicle with an information recording medium being attached to the on-board radio unit and removed the on-board radio unit; a drive unit switch that is connected to the battery for controlling to drive and stop a drive unit that is mounted on said vehicle for driving thereof; a control part that is connected to said drive unit switch through a power supply line, and to said on-board radio unit through a communication line and an on-board radio unit power supply line; and a notification part that is mounted on said navigation unit for notifying a residual state of said information recording medium to a user; wherein said control part detects when said drive unit switch has been turned off, also detects the residual state of said information recording medium with respect to said on-board radio unit through said communication line thereby to notify it to said notification part, and interrupts the supply of power to said on-board radio unit through said on-board radio unit power supply line when said information recording medium is absent.