Primary (For Engine Controls)

Throttle Body Components:

Throttle Position Sensor/Switch:

PURPOSE
To provide the ECCS Control Module (ECM) with a voltage signal that corresponds to accelerator pedal movement.

Throttle Position Sensor (TPS) Operating Characteristics:

OPERATION
The Throttle Position Sensor has both a linear potentiometer (sensor) and Closed/Wide Open Throttle switches. The Throttle position sensor is a kind of potentiometer which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In addition, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the ECM.
Closed throttle position of the throttle valve is determined by the ECM receiving the signal from the throttle sensor. This system is called "soft closed throttle position switch". It controls engine operation such as fuel cut. On the other hand, 'hard closed throttle position switch", which is built in the throttle position sensor unit, is used for engine control when soft closed throttle position switch is malfunctioning.

NOTE: The Wide Open Throttle Switch is not used.