Operation CHARM: Car repair manuals for everyone.
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
If it fails: lemon-manuals.org.ua

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Oscilloscope Patterns and Waveforms

CMP sensor signal




- PCM terminals: 2E(+)-Body ground(-)
- Oscilloscope setting: 2 V/DIV (Y), 50 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load, P/S off, A/C off)