Electronic Throttle System (ETS): Components: Notes
ETC (Electronic Throttle Control) system is installed in throttle. ETC system controls the opening angle of throttle valve to operate throttle valve control, idle speed control, traction control, auto cruise control and so on.
ECM receives accelerator position sensor signals (APS1, APS2) and calculates appropriate throttle opening angle which is used to control the throttle angle of throttle motor. Throttle position sensor integrated into throttle body assembly detects the throttle opening angle (TPS1, TPS2) and sends it to ECM for feedback control.