Knock Sensor: Description and Operation

KNOCK SENSOR (KS)
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a voltage signal and sent to the Engine Control Module (ECM).

NOTE: In case of knock sensor, the freeze frame data will not be stored in ECM. The knock sensor does not have the two trip detection logic, and will not light up the Malfunction Indicator Lamp (MIL).