D50/Power Ram 50 V6-181 3.0L SOHC (1991)
Idle Position Switch: Description and Operation
The Motor Position Sensor (MPS) is a variable type sensor, installed in the Idle Speed Control (ISC) servo. Its sliding pin is in contact with the ISC
plunger end and as the ISC plunger moves, the internal resistance of the MPS changes. The MPS senses the ISC servo plunger position and sends the
signal to the ECU. The ECU controls the valve opening and the idle speed by using the MPS signal, idle signal, engine coolant temperature signal, load
signals and vehicle speed signal.