Hyundai Elantra: Engine Control System / CVVD Actuator
Description and operation
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
Item
|
Specification
|
Type
| BLDC MOTOR
|
Operating Voltage (V)
| 9.1 - 16
|
Control Frequency (kHz)
| 10
|
Schematic diagrams

Harness Connector

Repair procedures
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") |
4. | 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) |

|
•
| 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. |
|
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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