Circuit Operation
- ABS-ECU contains the power supply circuit (terminal No. 13) for the pump motor. The pump motor is energized by the motor switch, which is incorporated in ABS-ECU.
- The pump motor switch, which is incorporated in ABS-ECU, is always off unless the ABS operating or the motor solenoid valve check is activated when the vehicle is started.
- ABS-ECU activates the pump motor by turning on the ECU built-in pump motor switch.