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Home >> Volvo >> 1991 >> 240 SE, AW70L >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> Engine Controls - Theory & Operation >> Computerized Engine Controls >> Input Devices >> Detonation (Knock) Sensor
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Detonation (Knock) Sensor

Knock sensor detects knocking and send signal to ignition ECU. ECU is able to gradually retard ignition timing to each individual cylinder. If knocking does not stop, a signal is sent to fuel injection ECU to enrich air/fuel mixture.

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