Method and apparatus for detecting fail of electronic parking brake

A method for detecting a fail of an electronic parking brake, comprising:

• detecting, by an electronic control unit (ECU), a current applied to a motor during a parking operation of an electronic parking brake, and detecting a current inflection point at which the slope of the current is changed, the slope of the current having started to rise in a load generation section following a no-load section after a starting current of the motor was generated;
• detecting, by the ECU, a time to reach the detected current inflection point;
• comparing the time to reach the detected current inflection point to a preset time to reach a preset reference current inflection point;
• and
• recognizing that a fail occurred during the parking operation of the electronic parking brake, when the time to reach the current inflection point is different by a preset error range or more from the time to reach the preset reference current inflection point,
• wherein when the time to reach the current inflection point is shorter than the time to reach the preset reference current inflection point, the ECU recognizes that a fail occurred during the parking operation of the electronic parking brake.