Soul L4-2.0L (2010)
Throttle Position Sensor: Description and Operation
Description
The Throttle Position Sensor (TPS) is mounted on the throttle body and detects the opening angle of the throttle plate. The TPS has a variable resistor
(potentiometer) which is changed according to the throttle angle.
During acceleration, the TPS resistance between the reference +5V and the signal terminal decreases and output voltage increases; during deceleration,
the TPS resistance increases and TPS output voltage decreases. The TPS output voltage will vary from 0.25 - 0.9V at closed throttle to minimum 4.0V at
wide-open throttle.
The ECM determines operating conditions such as idle (closed throttle), part load, acceleration / deceleration, and wide-open throttle by using the TPS
signal. Also the ECM uses the Manifold Absolute Pressure Sensor (MAPS) signal along with the TPS signal to adjust fuel injection duration and ignition
timing.
