California Emission Regulation Applicable ATX Model

Inspection Using An Oscilloscope (Reference) (California emission regulation applicable ATX model)

HO2S (rear) signal




- PCM terminals: 44(+) - 26(-)
- Oscilloscope setting: 200 mV/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)

HO2S (middle) signal




- PCM terminals: 45(+) - 26(-)
- Oscilloscope setting: 200 mV/DIV (Y), 1 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)

HO2S (front) heater control signal




- PCM terminals: 84(+)-26(-)
- Oscilloscope setting: 2.5 V/DIV (Y), 50 ms/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)