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 Throttle Position (TP) sensor is a rotary potentiometer in which the powertrain control module determines four operating modes from the TP signal.

These are:
^ closed throttle (idle or deceleration).
^ part throttle (Cruise, Moderate Acceleration).
^ Wide Open Throttle (WOT) (maximum acceleration, de-choke on crank and A/C cutout).
^ throttle angle rate.