Intake Throttle
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
The intake throttle modulates the intake airflow from the CAC into the intake manifold system. The intake throttle uses an electric motor to open and close a throttle plate, based upon inputs from the PCM. The intake throttle actuator is controlled by a PWM signal to attain the desired position using the TACM+ and TACM- circuits. The throttle position ranges between 0%, or fully open, and 100%, or fully closed.
The PCM senses the intake throttle plate position by monitoring the TP circuit. If the PCM detects an intake throttle plate position concern, a DTC sets indicating the throttle plate is either not at the desired position or the TP circuit is out of range.