Throttle Position (TP) Sensor (9-3 With Trionic T-5)

TP sensor is located on side of throttle body. TP sensor receives a 5 volt reference signal from ECM. It is connected to throttle, and returns a voltage proportional to throttle position. At idle, return voltage is about .5 volts and at full throttle, it is about 4.5 volts. Return voltage signal is used by ECM to enrichen fuel mixture during acceleration, and shut off fuel delivery during deceleration until a specified RPM is reached. TP sensor signal is also used to adjust turbo boost pressure.