Circuit Description
The positive battery voltage is supplied to terminal +BM of the ECM even if the ignition switch is turned to OFF for the Electronic Throttle Control System (ETCS) control system.
If this DTC is stored, the ECM shuts down the power for the ETCS motor and the magnetic clutch, and the ETCS valve is fully closed by the return spring.
However, the opening angle of the ETCS valve can be controlled by the accelerator pedal through the ETCS cable.