Kia Picanto JA Quiz
Engine Control System/Fuel System

Knock Sensor (KS)

In this manual: Engine Control System/Fuel System
General Information — 8Maintenance — 30Engine Mechanical System — 46Engine Electrical System — 14Emission Control System — 11Engine Control System/Fuel System — 46Clutch System — 12Manual Transmission — 10Drive Shaft and Axle — 8Suspension System — 15Steering — 9Restraints — 17Brake System — 22Body (Interior and Exterior) — 104Body Electrical System — 80Heating, Ventilation, and Air Conditioning — 17
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
Capacitance (pF) 850 - 1150
Type Piezoelectric
Pin 2

Description and Operation

Description

Knock is an abnormal combustion phenomenon characterized by unwanted vibration and noise, which may cause engine damage. Installed on the cylinder block, the Knock Sensor (KS) detects engine knocking. When knocking occurs, vibration from the cylinder block is applied as pressure to the piezoelectric element. When knock occurs, the sensor outputs a voltage signal. The ECM retards ignition timing when knocking occurs. If the knock stops after retarding the ignition timing, the ECM advances the ignition timing again. This sequence can improve engine power, torque and fuel economy.

Circuit Diagrams

Wiring Diagram

[A/T]

[M/T]

Repair Procedures

Removal

  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 delivery pipe. (Refer to Fuel System - "Delivery Pipe").
  4. Remove the knock sensor (A) after loosening the mounting bolt. Knock Sensor Mounting Bolt: 18.6–24 N·m

Installation

  1. Install in the reverse order of removal.

Test yourself

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