Inspection Procedure 12: ASC-ECU power supply circuit system: Operation

ASC-ECU contains the power supply circuit (terminal No. 32) for the solenoid valve. The solenoid valve is energized by the valve relay, which is incorporated in ASC-ECU.
ASC-ECU contains the power supply circuit (terminal No. 2) for ASC-ECU. The power is supplied from the fusible link No. 34 through the multi-purpose fuse No. 17.
ASC-ECU contains the power supply circuit (terminal No. 8) for ASC-ECU. When the ignition switch (IG1) is turned ON, the voltage is applied to the relay incorporated in ETACS-ECU to turn ON the relay, and the power is supplied from the fusible link No. 34 through multi-purpose fuse No. 12.
ASC-ECU contains the power supply circuit (terminal No. 1) for the pump motor. The pump motor is energized by the motor switch, which is incorporated in ASC-ECU.
When malfunction occurs in ASC-ECU power supply, the communication with scan tool becomes unavailable.