Monitor Description

The ECM monitors the flow of an electrical current through the electronic throttle actuator, and detects malfunctions or open circuits in the throttle actuator based on the value of the electrical current. When the current deviates from the standard values, the ECM determines that there is a fault in the throttle actuator. In addition, if the throttle valve is not functioning properly (for example, stuck ON) the ECM determines that there is a fault and illuminates the MIL and sets a DTC.

If the ECM determines that the Electronic Throttle Control System (ETCS) is malfunctioning, it shuts off the power to the throttle motor, the throttle valve is closed by the return spring, and the throttle valve is locked at a certain operating angle. At the same time, operation of the ECTS is cancelled until the system returns to normal or the ignition switch is turned to OFF.