Idle Speed Motor Position Sensor: Description and Operation

The idle speed control motor position sensor is a variable resistor type, and is integrated in the idle speed control motor system. The sliding pin of idle speed control motor position sensor is in contact with the end of the plunger. Therefore, as the plunger moves, the internal resistance of idle speed control motor position sensor varies. This leads to the variation of the output Voltage. The idle speed control motor position sensor detects the plunger position of the idle speed control motor system, and sends the signal to engine control module. the engine control module processes the idle speed control motor position sensor signal, idle signal, coolant temperature signal, load signal (A/T & A/C) and vehicle speed signal to control the opening angle of the throttle valve and revolution speed during engine idling.