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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): 2A0 (+)-body ground (-)

Oscilloscope setting
- 5V/DIV (Y), 500 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up (no load)