Summit Wagon AWD L4-1795cc 1.8L SOHC (1994)
Idle Speed Motor Position Sensor: Description and Operation
Idle Air Control Valve Position Sensor
PURPOSE
The Idle Air Control (IAC) Valve Position Sensor converts the position changes of the idle valve into pulse signals.
OPERATION
As the valve moves the position changes are detected by the hall effect units and converted into pulse signals. The pulse signals are sent to the
Engine Control Module (ECM) and used to determine the position of the IAC valve.
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The IAC valve position sensor converts the changes (increase or decrease) in the valve position of the idle air control motor into pulse signals and
input5 these signals to the engine control module. The engine control module determines the valve position from these signals and also controls
the idle air control motor.
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5V power is supplied to the IAC valve position sensor from the engine control module and the ground connection is positioned in the engine
control module.
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5V power is applied to the two IAC valve position sensor output terminals from the engine control module. When the IAC valve position is
changed (increased or decreased) by the DC motor inside the servo the IAC valve position sensor generates a pulse signal from the opening and
closing between the output terminal and the ground.
CONSTRUCTION
The sensor consists of two hall effect units coupled to the idle air control valve.
