Circuit Description

Battery positive voltage is supplied to terminal +BM of ECM even when ignition switch is off for electric throttle control system. If malfunction is detected, ECM shuts down power for throttle motor, and throttle valve is fully closed by return spring. Throttle valve is locked at a certain opening angle. Also, all electronically controlled throttle operation is cancelled until system returns to normal and ignition switch is turned off.

DTC is set when there is an open in ETCS power source circuit. Possible causes are an open in ETCS power source circuit or faulty ECM.