Hyundai i-30: Engine Control System / Knock Sensor (KS)

Hyundai i30 (PD) 2018-2024 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. 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.

Specifications
Specification
Item
Specification
Capacitance (pF)
850 - 1,150
Resistance (MΩ)
R > 1

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Remove the intake manifold
(Refer to Engine Mechanical System - "Intake Manifold")
3.
Remove the installation bolt (A), and then remove the sensor from the cylinder block.
Tightening Torque :
18.6 - 24.5 N.m (1.9 - 2.5 kgf.m, 13.7 - 18.1 lb-ft)

Installation
  
Install the component with the specified torques.
Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.
1.
Install in the reverse order of removal.

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