Knock Sensor

The Knock Sensor (KS) is mounted on engine block. The KS detects knocking condition/vibration from engine. The KS is a piezo electric element that converts vibration into a voltage signal which is then sent to the ECM. On Accent, the ECM compares KS and rough road (acceleration) sensor inputs to detect true engine knock. See ACCELERATION SENSOR (ACCENT) . If the ECM determines that engine knock is occurring, the ECM will retard timing until knock is suppressed.