FAQ : 172 : Knock sensor - C4

FAQ

FAQ #172

	Knock sensor
	Knock sensor (1120) The engine knock information, transmitted by the sensor, enables the ECU to correct the ignition advance (reduction) . Knock is a vibratory phenomenon due to an exploding combustion of the air/fuel mixture in one of the 4 cylinders . The sensor transmits voltage peaks to the injection ECU when there is knocking . After engine knocking information, the ECU reduces the ignition timing, and simultaneously enriches the air-fuel mixture . Electrical features Supply : Injection ECU . Allocation of the connector channels : Channel 1 : +5 volts supply Channel 2 : Signal Location Location : Cylinder block .
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FAQ Posted by	Dave_Retired.
Info	Created: 22 September 2009 Last Updated: 22 September 2009

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