Kia Forte BD Quiz
Engine Control System/Fuel System

Knock Sensor (KS)

In this manual: Engine Control System/Fuel System
General Information — 8Maintenance — 32Engine Mechanical System — 47Engine Electrical System — 17Emission Control System — 10Engine Control System/Fuel System — 32Clutch System — 11Manual Transmission — 11DCT (Dual Clutch Transmission) System — 16Drive Shaft and Axle — 8Suspension System — 26Steering — 9Restraints — 11Brake System — 27Body (Interior and Exterior) — 119Body Electrical System — 98Heating, Ventilation, and Air Conditioning — 27
4steps
~24min
2/5difficulty
0102030405023.517N·mlb·ft
Tightening torque found on this page
Done 0 of 4

Specifications

Specification

Item Specification
Resistance (MΩ) 4,87

Description and Operation

Description

Knock is a phenomenon characterized by undesirable vibration and noise, and it may cause engine damage. The Knock Sensor (KS) is installed on the cylinder block and detects engine knocking.

When knock occurs, the engine block vibration is transmitted as pressure to the piezoelectric element. When knocking occurs, the sensor outputs a voltage signal. The ECM retards the ignition timing when knock occurs. If the knock stops after ignition timing retard, the ECM advances the ignition timing. This sequential control can improve engine power, torque and fuel economy.

Circuit Diagrams

Wiring Diagram

Harness Connector

Repair Procedures

Removal and Installation

  1. Turn the ignition switch OFF and disconnect the negative (-) battery terminal.

  2. Remove the intake manifold.

    (Refer to Engine Mechanical System - "Intake Manifold")

  3. Remove the knock sensor (A) after loosening the mounting bolt.

    Knock Sensor Mounting Bolt:

    18,6–24 N·m

  4. Install in the reverse order of removal.

Test yourself

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