Monitor Description

The skid control ECU assembly monitors the voltage of the pump motor.

When the pump motor relay is instructed to be on and the voltage of the pump motor is within the range of an open circuit malfunction (voltage value is practically equal to that when off), or when the pump motor is instructed to be off and the voltage of the pump motor is within the range of a short circuit malfunction (voltage value is practically equal to that when on), an open circuit or short circuit is judged respectively and the MIL is illuminated and stores a DTC.

Furthermore, when the voltage of the pump motor is practically equal to that when on for a long period of time, the skid control ECU assembly judges that the pump motor is operating for an abnormally long time and illuminates the MIL and stores a DTC.