System and method for connecting external device with vehicle

1. A system for connecting an external device to a vehicle, the system comprising:

an external device connection terminal configured to be connected to an external device;

an electronic instrument cluster configured to display a user setting mode when the external device connection terminal is connected to the external device;

a controller configured to receive an indication of a power source selected by a user from the electronic instrument cluster and control a switching element configured to adjust whether or not power is applied from a battery of the vehicle based on the power source selected by the user; and

an intelligent power switch (IPS) element configured to sense a current supplied to the external device connection terminal and provide the sensed current to the controller,

wherein the controller is further configured to calculate an average value of the current sensed by the IPS element and turn off the switching element when an amount of current flowing is greater than or equal to the average value of the current sensed by the IPS element after a predetermined period of time.

2. The system according to claim 1 , wherein:

the user setting mode includes an external device connection menu,

the external device connection menu includes a menu with user-selectable options including the power source and a cut time setting.

3. The system according to claim 2 , wherein the power source provides one of battery power, ACC power, and ignition power.

4. The system according to claim 1 , further comprising a key switch configured to adjust the power source selected by the user.