Engine Diesel Engines
• The HO2S supplies the PCM with a current between -1.8…+1.8 mA.
M6FL_01086
X
Excess-air factor λ
Y Current
• Since the HO2S only generates a usable signal above a certain temperature, it features
an integral heater element. The temperature of the HO2S is controlled by the PCM,
which activates the heater element via a duty signal.
M6FL_01085
1 From PCM control relay 3 PCM
2 Heater element
Service Training Mazda6 Facelift 01-71
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