Esteem L4-1590cc 1.6L SOHC 0 MFI 16V (1995)
Throttle Position Sensor: Description and Operation
Throttle Position Sensor
The throttle position sensor is connected to the throttle valve shaft on the throttle body, and detects the throttle valve opening. The throttle 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 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 and EGR solenoid
vacuum valve. Also, 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.
