Typical location of the idle air control valve.
Idle air control valve appearance.
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.
The USB Oscilloscope program is required for waveform playback. Get the latest USB Oscilloscope program here.
IAC valve - Chevrolet Aveo 1.5i 2006