Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Idle Speed Motor Position Sensor: Description and Operation

Motor Position Sensor Circuit:

The Motor Position Sensor (MPS), located in the Idle Speed Control (ISC) servo, is a variable resistor type sensor. It uses a plunger (contact), that is connected to the ISC servo and a set of electrical windings, that are stationary. As the servo moves, so does the plunger, changing the output Voltage of the sensor. The ECU uses this signal to determine the position of the ISC servo.