Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

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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)

CMP sensor signal




(+)
- PCM terminals
- CMP sensor (left bank): 80 (+) - 26 (-)
- CMP sensor (right bank): 28 (+) - 26 (-)

- Oscilloscope setting
- 1 V/DIV (Y), 20 ms/DIV (X), DC range

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




(-)
- PCM terminals
- CMP sensor (left bank): 54 (+) - 26 (-)
- CMP sensor (right bank): 2 (+) - 26 (-)

- Oscilloscope setting
- 1 V/DIV (Y), 20 ms/DIV (X), DC range

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