Circuit Description
WARNING: This page is about a different car, the 2003 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
Throttle position (TP) sensor is mounted in the throttle body and detects the throttle valve opening angle. When the throttle valve is fully closed, a voltage of approximately 0.3-0.8 volt is applied to terminal VTA of the ECM. The voltage applied to the terminal VTA of the ECM increases in proportion to the opening angle of the throttle valve and becomes approximately 3.2-4.9 volts when the throttle valve is fully opened. The ECM determines the vehicle driving conditions from these signals input from terminal VTA. ECM uses it as one of the conditions to determine the air-fuel ratio correction, power increase correction, fuel-cut control, etc.