Monitor Description

When the volume of brake fluid within the accumulator is below a certain amount, the No. 1 skid control ECU (brake booster with master cylinder assembly) operates the pump motor. When the pump motor is being operated and the output value of the accumulator pressure sensor does not change substantially for a certain period of time, the No. 2 skid control ECU (brake actuator assembly) judges that the accumulator pressure sensor has a stuck malfunction and illuminates the MIL and stores this DTC.