Operation CHARM: Car repair manuals for everyone.

Oscilloscope Patterns and Waveforms

CMP sensor signal (+)




- PCM terminals: 2U (+)-body ground (-)
Oscilloscope setting: 2G1 V/DIV (Y), 25 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 650 rpm, no load)

CMP sensor signal (-)




- PCM terminals: 2V (+)-body ground (-)
- Oscilloscope setting: 2G1 V/DIV (Y), 25 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm up (engine speed approx. 650 rpm, no load)