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: Schematic Diagrams
C
Kia Cadenza YG 2016-2021 Service Manual: General Safety Information and Caution
Instructions When Handling Refrigerant 1. R-134a liquid refrigerant is highly volatile. A drop on the skin of your hand could result in localized frostbite. When handling the refrigerant, be sure to wear gloves. 2. It is standard practice to wear goggles or glasses to protect your eyes, and gloves to protect your hands.
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