Method for checking fault of high voltage relay and relay control circuit in hybrid vehicle

A method for checking fault of high voltage relay and relay control circuit in a hybrid vehicle is provided to diagnose fault of control circuit inside BMS by discriminating shot circuit or disconnection of wire. A method for checking fault of high voltage relay and relay control circuit in a hybrid vehicle comprises a step for turning on IG; a step for comparing the battery voltage and inverter DC link voltage; and a step for comparing voltage value of precharging relay control output with a reference voltage value in case the difference is within 0.1V or 0.5V or 1V after comparing the battery voltage and the inverter DC link voltage.