•  Detects abnormal combustion in the cylinder as basic information for mainly determining the ignition timing.

•  Detects abnormal combustion in the combustion chamber and sends it to the PCM as a knocking signal.

•  Installed on the cylinder block.

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•  A piezoelectric element has been adopted as the detecting element for detecting abnormal combustion.

•  Sends the signal, which fluctuates according to abnormal combustion, to the PCM.

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