Kia Stinger: Engine Control System / Knock Sensor (KS)

Kia Stinger CK 2018-2021 Service Manual / Engine Control / Fuel System / Engine Control System / Knock Sensor (KS)

Specifications
Specification

Item
Specification
Capacitance (pF)
850 - 1,150
Resistance (MΩ)
Approx. 1

Description and operation
Description

Knocking is a phenomenon characterized by undesirable vibration and noise that 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, and the sensor produces voltage signal to ECM. On receipt of this signal, ECM will control the ignition timing by retarding the ignition timing and then advancing the ignition timing when the knocking disappears. This sequential control can improve engine power, torque and fuel economy.

Schematic diagrams
Circuit Diagram

Harness Connector

Repair procedures
Inspection
1.

Switch "OFF" the ignition.

2.

Disconnect the knock sensor connector.

3.

Measure resistance between the injector terminals 1 and 2.

4.

Check that the resistance is within the specification.

Specification: About 4.87 MΩ [20°C(68°F)]

Removal
1.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.

Remove the intake manifold.

(Refer to Engine Mechanical System - “Intake Manifold”)

3.

Remove the delivery pipe & injector assembly.

(Refer to Fuel Delivery System - "Delivery Pipe")

4.

Remove the knock sensor (A) after loosening the mounting bolt from the cylinder block.

Knock sensor installation bolt :

18.6 - 23.5 N·m (1.9 - 2.4 kgf·m, 13.7 - 17.4 lb·ft)

Installation
  

Install the component to 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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