Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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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]