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.

    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.

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

    Other information:

    Kia Cadenza YG 2016-2021 Service Manual: Description and Operation

    Description BSD is a system that uses two magnetic wave radar sensors attached on the rear bumper to measure the distance from the following vehicles and provides the sensing and (visual and auditory) alarm of any vehicle coming into the blind spot.

    Kia Cadenza YG 2016-2021 Service Manual: Blind Spot Detection Radar Calibration Description and Operation

    Description To sense the cars exactly in the next lane with the radar, the direction of the sensor and the direction of the vehicle have to align. This is BSD unit alignment. If this alignment is not performed as below illustration, the degradation of detection performance and the cause of false alarms.

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