DTC P050A-85: Cold Start Idle Air Control System Performance: General Description

WARNING: This page is about a different variant/trim than selected.

The idle speed is controlled by the Electrical Throttle Control (ETC) system. ETC system is composed of the throttle motor to operate the throttle valve and the throttle position sensor to detect the opening angle of the throttle valve, the accelerator pedal position sensor to detect the accelerator pedal position and the one valve type throttle body. The Powertrain Control Module (PCM) controls the throttle motor to provide the proper throttle valve opening angle for the target idle speed. The PCM detects the current throttle position by referring to the initial position learning value (operating data) of the throttle motor and the voltage change of the TPS value, and supplies the current through the duty control (PWM) to the motor for precise control.