Hyundai Tucson Quiz
Engine/Fuel Control System

KNOCK SENSOR (KS)

In this manual: Engine/Fuel Control System
General Information — 17Engine Mechanical System — 51Engine Electrical System — 26Emission Control System — 23Engine/Fuel Control System — 44Clutch System — 12MANUAL TRANSMISSION SYSTEM — 12AUTOMATIC TRANSMISSION SYSTEM — 42Four-Wheel Drive (4WD) System — 14Drive Shaft and Axle — 22Suspension System — 30Steering System — 16Restraint — 21Braking System — 47Body Work (Interior and Exterior) — 145Body Electrical System — 162Heating, Ventilation and Air Conditioning — 39
4steps
~24min
2/5difficulty
0102030405023.517N·mlb·ft
Tightening torque found on this page
Done 0 of 4

Description and Operation

Description

Knock is a phenomenon characterized by vibration and undesirable noise, and it can lead to engine damage. The knock sensor (KS) is installed on the cylinder block and detects engine knock. When knock occurs, the vibration of the cylinder block is applied to the piezoelectric element as pressure. When knock occurs, the sensor outputs a voltage signal. The ECM retards ignition timing when knock occurs. If knock stops after ignition timing retard, the ECM advances ignition timing again. This sequential control can improve engine torque, engine output and fuel economy.

Specifications

Specification

Item Specification
Electrostatic Capacitance (pF) 850~1150

Circuit Diagrams

Wiring Diagram

(B)

(MT)

Repair Procedures

DEPOSIT

  1. Turn the ignition switch to the OFF position and disconnect the negative (-) battery cable.
  2. Remove the intake manifold (Refer to INTAKE AND EXHAUST SYSTEM).
  3. Disconnect the knock sensor connector (A).
  4. Remove the knock sensor after loosening the mounting bolt (B).

REMEDY

  1. To install, reverse the removal procedure. Knock sensor mounting bolt: 18.6~24 N·m

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