Accent L4-1.6L (2003)
Knock Sensor: Description and Operation
KNOCK SENSOR
The knock sensor is attached to the side of the cylinder block to sense engine knocking. A knocking vibration from the cylinder block is applied as
pressure to the piezoelectric element. This vibrational pressure is then converted into a voltage signal which is relayed to the ECM. If engine knocking
occurs, ignition timing is retarded to suppress it.
