Accent L L4-1495cc 1.5L SOHC MFI (2001)
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.