KNOCK SENSOR (KS) [SKYACTIV-G 2.5T]

id0140h0004900


Purpose

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

Function

•  Detects engine vibration caused by abnormal combustion in the combustion chamber and sends the output voltage based on the strength of the vibration to the PCM as a knocking signal.

KS characteristic

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Construction

•  The KS is located on the cylinder block.
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•  A piezoelectric element has been adopted for the detection area of the KS.
•  A piezoelectric element produces voltage by the application of vibration or pressure. Using this characteristic, the sensor outputs vibration caused by abnormal combustion as voltage.
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Operation

1.  The KS detects (1) abnormal combustion.

2.  The KS sends (2) the detected abnormal combustion to the PCM as a knocking signal.

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Fail-safe

DTC No.

Fail-safe function
P0327:00
•  Sets the knocking spark retard correction value of the ignition control to the fixed value.
P0328:00
•  Sets the knocking spark retard correction value of the ignition control to the fixed value.