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 OSCILLOSCOPE

During cranking or idling, check waveform between terminal IGT1,IGF and E1 of ECM.

HINT: The IGT2, IGT3, IGT4, IGT5 and IGT6 signal waveforms are the same as the IGT1 signal waveform.