D21 Hardbody 4WD V6-2960cc 3.0L SOHC MFI (VG30E) (1991)
Throttle Position Sensor: Description and Operation
Throttle Sensor-Soft/Hard Idle Switch
The throttle sensor-soft/hard idle switch is mounted to the throttle shaft. It is a variable resistor (soft idle switch) and an open/close switch (hard
idle switch). The variable resistor circuit (soft idle switch) in the sensor monitors the throttle angle and speed of throttle movement. It supplies a
voltage signal to the ECU in response to throttle position. The open close switch (hard idle switch) circuit is used for diagnostic purposes and not
for engine control.