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Home >> Volvo >> 1994 >> 940 Base, 4D Sedan, AW71 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Knock Sensor
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Knock Sensor

Knock sensor detects knocking and sends signal to Motronic or ignition ECU. ECU is able to gradually retard ignition timing to each individual cylinder. If knocking does not stop, a signal is sent to Motronic or fuel injection ECU to enrich air/fuel mixture. 6-cylinder engines are equipped with 2 knock sensors.

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