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 or lemon-manuals.org.ua

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Oscilloscope Patterns and Waveforms

Inspection Using An Oscilloscope (Reference)

CKP sensor signal




(+)
- PCM terminals
- 27(+) - 26(-)

- Oscilloscope setting
- 2 V/DIV (Y), 10 ms/DIV (X), DC range

- Vehicle condition
- Idle after warm up (no load)




(-)
- PCM terminals
- 1 (+) - 26 (-)
- Oscilloscope setting
- 5 V/DIV (Y), 5 ms/DIV (X), DC range
- Vehicle condition
- Idle after warm up (no load)