Engine Electronic Control Systems ( 4826 )

Sensors

TPS - Throttle Position Sensor

What does TPS do?
The purpose of the TPS is to monitor the position of the throttle in an engine combustion.

Potentiometer Type Sensors - are composed of variable resistors that have a slide contact, which changes its position as the throttle butterfly moves.
A voltage is supplied to the sensor by the E.C.U. As the throttle position changes, the output voltage from the sensor changes, this in turn is recognised and a comparision made by the E.C.U to its memory. These sensors are adjusted by loosening the sensor mounting screws.

Checking the Throttle Position Sensor

What type of TPS is this?
It is a potentiometer type sensor.

Explain its internal operation and why your voltage changes.
The internal operation of the TPS is to monitor the position of the throttle in an engine combustion and the voltage changes because the potentiometer changes the resistance which results to change in voltage.

Now connect a power supply to your sensor and test the voltage output at different throttle angles.
Note: Always use 5V supply.

Now plot your findings on the Graph