Oscilloscope Patterns and Waveforms

INSPECTION USING AN OSCILLOSCOPE (REFERENCE)




HO2S (front) heater control signal (California emission regulation applicable model)
PCM terminals
- 2G(+) - 2AA(-)

Oscilloscope setting
- 5 V/DIV (Y), 50 ms/DIV (X), DC range

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




HO2S (front) heater control signal (except for California emission regulation applicable model)
PCM terminals
- 2G(+) - 2AA(-)

Oscilloscope setting
- 5 V/DIV (Y), 125 ms/DIV (X), DC range

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




HO2S (front) signal (except for California emission regulation applicable model)
PCM terminals
- 2AG(+) - 2AA(-)

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)