Patent ID: 7843318

Claim:
A monitoring apparatus for an electronic key, comprising: an immobilizer mounted on a movable body; a GPS navigation unit mounted on the movable body; monitoring means for continuously detecting communication status between an electronic key and the immobilizer, which communication deactivates a function of the immobilizer; means for informing the GPS navigation unit of the detected communication status by sending a signal Sw to the GPS navigation unit when the communication from the electronic key has stopped; means for storing and displaying a stored location of the electronic key at a time when the communication has stopped as positional information of the electronic key on a display panel of the GPS navigation unit without an action by an operator of the monitoring apparatus; and means for calling the stored location of the electronic key and inputting the stored location to the means for displaying the stored location on the display panel at any of a plurality of times after the time when the communication has stopped.