Swift L4-1298cc 1.3L SOHC MFI (1997)
Throttle Position Sensor: Description and Operation
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, ISC actuator, EGR solenoid vacuum valve and automatic
transmission.
