Patent ID: 8718893

Claim:
A method of detecting a failure of a motor of an electric vehicle brake booster which selectively performs a brake pressure control mode in a case in which a braking intention of a driver is present, and a motor position control mode in a case in which the braking intention of the driver is not present, the method comprising: a) determining whether the electric vehicle brake booster is in the brake pressure control mode or the motor position control mode; b) storing a first position value of the motor for each of predetermined periods when it is determined that the electric vehicle brake booster is in the brake pressure control mode; c) comparing the first position value stored for the last period among the first position values with a second position value of the motor in the motor position control mode when the mode is changed from the brake pressure control mode to the motor position control mode; and d) determining that the motor is in a locked state when the first position value and the second position value are substantially identical.