Operation CHARM: Car repair manuals for everyone.

Oscilloscope Patterns and Waveforms

Inspection Using An Oscilloscope (Reference)




Fan control signal
PCM terminals

- 44 (+) - 25 (-)

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

Vehicle condition
- Idle after warm up (no load)