AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL OPERATION [MZR-CD (RF Turbo)]

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Operation Conditions

• The PCM operates the A/F sensor heater when the following conditions are met.

Activation condition

Drive signal

•  After the engine has started and a fixed period of time has elapsed (the elapsed time period after the engine starts is determined by exhaust gas temperature).

•  Battery positive voltage is 9 V or more and less than 16 V.

•  The PCM outputs a duty signal.

•  The element temperature is measured by the impedance of the A/F sensor heater and a duty ratio is determined.