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

Kia Rio 2017-2023 YB Service Manual / Engine Control / Fuel System / Engine Control System / Knock Sensor (KS)

Specifications

Specification

Knock Sensor (KS)

Item	Specification
Resistance(MΩ)	4.87
Capacitance (pF)	950 ~ 1,350
Type	Piezo-electricity
Pin	2

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. At this time, this sensor transfers the voltage signal higher than the specified value to the ECM and the ECM retards the ignition timing. 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.

Schematic diagrams

Circuit Diagram

Repair procedures

Removal

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

2.	Remove the intake manifold. (Refer to Engine Mechanical System - "Intake Manifold")

Remove the installation bolt (A), and then remove the sensor 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 with the specified torques.

•	Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.

1.	Installation is reverse of removal.

❮Camshaft Position Sensor (CMPS)

Specifications Specification Camshaft Position Sensor (CMPS) Item Specification Type Hall effect type Output Pulse (V) 0 ~ 5 Air Gap [mm (in.

Heated Oxygen Sensor (HO2S)❯

Specifications Specification Heated Oxygen Sensor (HO2S) HO2S [Bank 1/Sensor 1] Item Specification Heater Resistance (Ω) Approximately 9.

Other information:

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Description and operation Description The cluster ionizer helps to clean up odors in the vehicle or from the air-conditioner system. When the ignition switch ON, the inoizer runs a "CLEAN" mode and then a "ION" mode, switching every about 15 minutes.