Hyundai GENESIS COUPE BK 2010 Manual page 340

knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. At this time,
this sensor transfers the voltage signal higher than the specified value to the ECM and the ECM retards the ignition
timing. If the knocking disappears after retarding the ignition timing, the ECM will advance the ignition timing. This
sequential control can improve engine power, torque and fuel economy.
Fuel System > Engine Control System > Knock Sensor (KS) > Specifications
Specification
Capacitance (pF)
Fuel System > Engine Control System > Knock Sensor (KS) > Schematic Diagrams
Circuit Diagram
Item Specification
1,480 ~ 2,220