Oscilloscope Patterns and Waveforms

HO2S heater control signal




- PCM terminals
- Front HO2S heater (right bank): 2AW (+)-body ground (-)
- Front HO2S heater (left bank): 2AS (+)-body ground (-)
- Rear HO2S heater (right bank): 2AT (+)-body ground (-)
- Rear HO2S heater (left bank): 2AO (+)-body ground (-)

- Oscilloscope setting: 5 V/DIV (Y), 500 minutes/DIV (X), DC range
- Vehicle condition: Idle after warm up (no load)