Hyundai Genesis (DH): Engine Control System / Knock Sensor (KS) Description and Operation
Knocking is a phenomenon characterized by undesirable
vibration and noise and can cause engine damage. The two Knock Sensors
(KS) are installed inside the V-valley of the cylinder block and sense
engine knocking.
When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element.
When knocking occurs, the sensor produces voltage signal 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.

Inspection
1.
Check the signal waveform of the CMPS and CKPS using the GDS.
Specification: Refer to
Specification
ItemSpecificationCapacitance (pF)950 ~ 1,350Resistance (M?)4.87
Other information:
Inspection with GDS
Initialization and diagnosis sequence by using GDS equipment.
The following is the summarized A/S procedure.
NoProcedure1Park the vehicle on level ground2Tire check3IGN1 ON4Head lamp Low Beam ON5Connection with diagnostic tool6Initial command by diagnostic tool7Clear DTC Code8IGN1 OFF > ON9Re- Connection with diagnostic t
C