Operation CHARM: Car repair manuals for everyone.

Oscilloscope Patterns and Waveforms

H02S (front) signal




PCM terminals
- 2AG (+) - body ground (-)

Oscilloscope setting
- 0.2 V/DIV (Y), 500 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up (engine speed approx. 650 rpm, no load)