NOVELTY - The electrical leakage diagnosis apparatus (1) comprises an insulation resistance sensor (20) configured to measure an insulation resistance between a high voltage battery (10) and a chassis of a vehicle, and output the measured insulation resistance. A main switching portion (30) is configured to selectively supply electrical power from the high voltage battery to electrical field loads of a vehicle according to an external control of the vehicle. A battery power management portion (40) is configured to terminate operation of multiple driving components to control a driving motor of vehicle.    USE - Electrical leakage diagnosis apparatus for measuring leakage of a high voltage battery of hybrid and electric vehicles, such as passenger automobiles, sports utility vehicles, busses and trucks. Uses include but are not limited to commercial vehicles, watercraft including boats and ships, aircraft, plug-in hybrid electric vehicles, hydrogen-powered vehicles, and gasoline-powered and electric-powered vehicles.    ADVANTAGE - The battery power management portion is configured to terminate operation of multiple driving components to control a driving motor of the vehicle which ensures that the risk of accidents occurring due to a disconnection of a high voltage circuit is minimized as the system operates in a proper limp-home mode with the aid of a logic programmed to recognize, based on the type of breakage detected, where in the system the breakage has occurred once a break is detected. The high voltage element associated with the insulation breakage is quickly searched which allows the system to be easily diagnosed and repaired.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following    (1) an electrical leakage diagnosis method for a vehicle; and    (2) a non-transitory computer readable medium comprises program instructions.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic block diagram of a diagnosis apparatus for a vehicle using an insulation resistance sensor.    Electrical leakage diagnosis apparatus (1)    High voltage battery (10)    Insulation resistance sensor (20)    Main switching portion (30)    Battery power management portion (40)