Accent GS Coupe L4-1495cc 1.5L SOHC MFI (1999)
Throttle Position Sensor: Description and Operation
THROTTLE POSITION SENSOR (TP)
The Throttle Position (TP) sensor mounts on the side of the throttle body and is connected to the throttle-blade shaft.
The TP sensor is a variable resistor (potentiometer) whose resistance changes according to throttle blade shaft position. During acceleration, the TP
sensor resistance decreases; during deceleration, the TP sensor resistance increases.
The Engine Control Module (ECM) applies a reference voltage to the TP sensor and then measures the voltage that is present on the TP sensor signal
circuit. The ECM uses the TP sensor signal to adjust timing and injector pulse width. The TP sensor signal along with the MAF sensor signal is used by
the ECM to calculate engine load.