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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Voltage Signal: Testing and Inspection

Manufacturer Specific Pattern

Generator output voltage signal

- PCM terminal: 30 (+) <-> 103(-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up