Secondary Throttle Position Sensor

COMPONENT DESCRIPTION
The secondary throttle position sensor responds to the movement of the throttle motor which is controlled by the TAC module. This sensor is a kind of potentiometer which transforms the secondary throttle position into output voltage and emits the voltage signal to the TAC module. In addition, the sensor detects the opening and closing speed and position of the secondary throttle valve and feeds the voltage signal to the TAC module.

Another case is when the secondary throttle valve opening becomes smaller than the ordinary throttle valve opening due to TCS operation. In this case, the signal from the secondary throttle valve is used for engine control. This replaces the signal from the ordinary throttle position sensor. The signal of the secondary throttle valve first enters the TAC module, from where it is sent to the ECM.