Knock Sensor (Kcs) - Kubota WG1605-E3 Diagnostic Manual

ECM SYSTEM
WG1605-G-E3,WG1605-L-E3,WG1605-GL-E3, DM

KNOCK SENSOR (KCS)

To prevent engine "knock", which occurs when the
fuel air mixture does not burn smoothly, during this
condition timing is generally decreased, to assist with the
fuel burn process. Kubota gasoline fuel system, utilizes
a Knock Sensor, which is installed to the engine block,
and attached by Kubota. The Knock Sensor is a 5 volt
reference signal sensor, which operates by the
resistance change in the sensor, to output a reference
voltage for the ECM to use. The knock sensor sends a
base or "no knock" signal to the EControls ECM, when
knocking does occur the sensor detects the increased
vibration, and increases the voltage output to the ECM.
When the ECM receives the voltage change, the ECM
will slightly retard the timing, until such time, the
knocking no longer exists.
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KiSC issued 12, 2016 A