Typical location of the idle air control valve.

Typical location of the idle air control valve.
Idle air control valve appearance.

Idle air control valve appearance.
Setting the USB Autoscope IV to 4-channel mode.

Setting the USB Autoscope IV to 4-channel mode.
Output voltage waveform from stepper motor control circuit of the idle air control valve on Chevrolet Aveo 1.5i 2006, recorded while the engine was at idle.

Output voltage waveform from stepper motor control circuit of the idle air control valve on Chevrolet Aveo 1.5i 2006, recorded while the engine was at idle.

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IAC valve - Chevrolet Aveo 1.5i 2006
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