Sidekick JS 2D Soft Top 2WD L4-1.6L (1997)
Throttle Position Sensor: Description and Operation
The throttle position sensor consisting of a contact point (idle switch) and a potentiometer is installed on the throttle body, and detects the throttle
valve opening.
The throttle opening in the idle state is detected by means of the contact point which turns ON in that state.
But beyond that, the full opening is detected by the potentiometer as follows.
A 5-volt reference voltage is applied to the sensor from ECM and as its brush moves over the print resistance according to the throttle valve
opening, the output voltage varies accordingly.
By monitoring the ON/OFF signal and sensor output voltage, ECM detects the throttle valve opening.
ECM uses the signal from TP sensor as one of the signals to control fuel injector, idle air control valve, ignition timing, EVAP solenoid purge
valve and EGR solenoid vacuum valve (if equipped).
Also for 4 A/T model, ECM converts the voltage signal from TP sensor into ON/OFF signal and sends it to transmission control module, where it
is used as one of the signals to control the automatic transmission.
