Operation CHARM: Car repair manuals for everyone.

Oscilloscope Patterns and Waveforms

Inspection Using An Oscilloscope (Reference)




Vehicle speed signal
- PCM terminal: 58 (+) - 24 (-)
- Oscilloscope setting: 1V/DIV (Y), 25ms/DIV(X), DC range
- Vehicle condition: Driving speed 60 km/h [37 mph]