Circuit Description
The idle speed is controlled by the Electric Throttle Control System (ETCS).
The ETCS is composed of: 1) the throttle motor, which operates the throttle valve; 2) the magnetic clutch, which connects the throttle motor with the throttle valve; 3) the throttle position sensor, which detects the opening angle of the throttle valve; 4) the accelerator pedal position sensor, which detects the accelerator pedal position; 5) the ECM, which controls the ETCS and 6) a one valve type throttle body.
The ECM controls the throttle motor to make the throttle valve open to the proper angle for the target idle
speed.