Hyundai Elantra: Engine Control System / CVVD Actuator

Hyundai Elantra (CN7) 2021-2025 Service Manual / Engine Control / Fuel System / Engine Control System / CVVD Actuator

Description and operation

Description

CVVD(Continuous Variable Valve Duration) System is a device to control the optimum open and close timing according to the driving mode by changing the valve opening section.

[CVVD Actuator]

Specifications

Specification

Item	Specification
Type	BLDC MOTOR
Operating Voltage (V)	9.1 - 16
Control Frequency (kHz)	10

Schematic diagrams

Circuit Diagram

Harness Connector

Repair procedures

Removal

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

2.	Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner Assembly")

3.	Remove the high pressure fuel pipe. (Refer to Fuel Delivery System - "Fuel Line")

Remove the CVVD actuator (A) after loosening the mounting bolt.

Tightening Torque :

18.6 - 24.5 N.m (1.9 - 2.5 kgf.m, 13.7 - 18.0 lb-ft)

Installation

•	When installing the CVVD actuator the shaft gear do not fit properly, rotate the CVVD actuator in both directions and installing it naturally. (Do not impact when installating the component.)

•	Do not damage to the component when installating the cylinder head cover oil seal (A).

•	Install the component with the specified torques.

•	Note that internal damage may occur when the component is dropped. If the component has been dropped, inspect before installing.

Adjustment

1.	Turn the ignition switch OFF.

2.	Connect the diagnostic tool to Data Link Connector (DLC).

3.	Turn the ignition switch ON.

4.	Select "Vehicle, Model Year, Engine, System".

5.	Select "CVVD Intake Adaption".

6.	Perform the "CVVD Learning" refer to the diagnostic tool.

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Fuel Delivery System

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Steering wheel audio control

The steering wheel audio control switches are installed for your convenience.

NOTICE

Do not operate audio remote control buttons simultaneously.

VOLUME (VOL + / VOL -) (1)

Move the VOLUME toggle switch up to increase volume. Move the VOLUME toggle switch down to decrease volume.