Montero SR 4WD V6-3.5L SOHC (1997)
Idle Speed/Throttle Actuator - Electronic: Description and Operation
OPERATION
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The amount of air taken in during idling is regulated by the opening and closing of the servo valve located in the air passage that bypasses the
throttle valve.
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The servo valve is opened or closed by the activation of the stepper motor (incorporated within the idle air control motor in the forward or reverse
direction.
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Battery positive voltage is supplied, by way of the MFI relay, to the coil of the stepper motor. The engine control module switches ON the power
transistors (located within the engine control module) in sequential order, and, when current flows to the stepper motor coil, the stepper motor is
activated in the forward or reverse direction.
