Outline Of Diagnosis

When the brake pedal is depressed, the electric brake booster control module monitors the servo pressure and increases the servo pressure by driving the pressure-increasing linear solenoid valve. When the brake pedal is depressed, if the actual servo pressure does not change even when the target servo pressure increases for a certain amount of time, the electric brake booster control module judges that the pressure-increasing linear solenoid valve is stuck closed and illuminates the MIL and stores this DTC.