Detonation (Knock) Sensor (Motronic & Regina)

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.