Hyundai Sonata: Knock Sensor (KS). Description and Operation
Description
Knocking is a phenomenon characterized by undesirable vibration and noise
and can cause engine damage. Knock Sensor (KS) is installed on 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”
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Knock Sensor (KS). Specifications
Specification
Item
Specification
Capacitance (pF)
850 ~ 1,150
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See also:
Components and Components Location
Components
1. Front seat belt
2. Height adjuster
3. Rear seat belt (RH)
4. Rear center seat belt
5. Rear seat belt (LH)
6. Rear center seat belt buckle
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License Lamp. Repair procedures
Removal
1.
Disconnect the negative(-) battery terminal.
2.
Remove the lens (A) after loosening the mounting screws.
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Under Body. Body Repair
Projected Dimensions
Actual- Measurement Dimensions
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