Hyundai Elantra: Engine Control System / Knock Sensor (KS) Repair procedures

Removal
1.
Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2.
Disconnect the knock sensor connector (A).

3.
Remove the intake manifold.
(Refer to Engine Mechanical System - "Intake Manifold")
4.
Remove the installation bolt (A), and then remove the sensor from the cylinder block.

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.

Knock sensor installation bolt :
18.6 ~ 23.5 N.m (1.9 ~ 2.4 kgf.m, 13.7 ~ 17.4 lb-ft)

Knock Sensor (KS) Schematic Diagrams
Circuit Diagram ...

Heated Oxygen Sensor (HO2S) Description and Operation
Description Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Catalytic Converter. It varies in accordance with the air/fuel rat ...

Other information:

Hyundai Elantra AD (2016-2020) Service Manual: Front Wiper Motor Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. If necessary, release the wiper blade fixing clip by pulling up and remove the wiper blade from the inside radius of wiper arm. 3. Remove the cowl top cover. (Refer to Body - "Cowl Top Cover") 4. Disconnect the windshield d ...

Hyundai Elantra AD (2016-2020) Service Manual: Schematic Diagrams
Schematic diagram Terminal Function NO.Function1-2C-CAN Low3C-CAN High4GND5IGN_16-7L-CAN Low8L-CAN High ...

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