Kia Cadenza YG: Engine Control System / Knock Sensor (KS) Description and Operation

Kia Cadenza YG 2016-2021 Service Manual / Engine Control / Fuel System / Engine Control System / Knock Sensor (KS) Description and Operation

Description

Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. The two Knock Sensor (KS) are installed inside the V-valley of the cylinder block and senses engine knocking.

When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element.

When a knock occurs, the sensor produces voltage signal. The ECM retards the ignition timing when knocking occurs. 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.

❮Camshaft Position Sensor (CMPS) Repair procedures

Inspection 1. Check the signal waveform of the CMPS and CKPS using the GDS. Specification: Refer to “Wave Form” Removal • DON''T remove the camshaft position sensor while the engine is running or right after engine is turned off.

Knock Sensor (KS) Specifications❯

Specification ItemSpecificationCapacitance (pF)950 ~ 1,350Resistance (MΩ)4.87

Other information:

Kia Cadenza YG 2016-2021 Service Manual: Antenna Coil Repair procedures

Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the crash pad lower panel. (Refer to Body - "Crash Pad") 3. Disconnect the 6P connector (B) of the coil antenna and then remove the coil antenna (A) after loosening the screw.

Kia Cadenza YG: Engine Control System / Knock Sensor (KS) Description and Operation

Other information:

Kia Cadenza YG 2016-2021 Service Manual: Antenna Coil Repair procedures

Kia Cadenza YG 2016-2021 Service Manual: Components and Components Location

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