Welcome to a new Import Service feature, called “Waveform Of The Month.” Each time this feature appears in Import Service, we’ll give you the lowdown on a single electronic waveform produced by an automotive electronic component or circuit. We’ll tell you why it looks the way it does, what makes it look the way it does, and what it means when it doesn’t look the way it should. When you’re through reading each “Waveform Of The Month” installment, you’ll know more about the waveform that it knows about itself.