Pdf Automotive Oscilloscopes Waveform Analysis -

These generate their own AC voltage. Commonly found on older ABS wheel speed sensors or camshaft triggers, they produce a sine-wave pattern that increases in both amplitude and frequency as component speed rises.

The voltage drops from battery voltage (~14V) to near 0V when the ECU grounds the circuit. pdf automotive oscilloscopes waveform analysis

Determines the speed at which the trace moves across the screen. A fast timebase (e.g., 1ms/div) shows high-speed signals like fuel injectors, while a slow one (e.g., 500ms/div) is better for slow-acting oxygen sensors. These generate their own AC voltage

Camshaft and crankshaft sensors synchronize ignition and fuel injection. while a slow one (e.g.