Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Throttle Position Sensor: Description and Operation


The TPS, located on the throttle body, is an electric resistor which is activated by the movement of the throttle shaft. The sensor produces a voltage which increases or decreases according to the throttle valve opening. The voltage signal is transmitted to the logic module where it is used with data from other sensors to adjust the air/fuel mixture accordingly.