Hyundai Elantra: Engine Control System / RCV Control Solenoid Valve
Description and operation
RCV (Recirculation Valve) Control Solenoid Valve is installed on the intercooler inlet pipe and operates the RCV actuator which controls the by-pass passage of the turbocharger compressor.When the throttle is closed, while the engine is running at cruise rpm (tip-out), the turbocharger boost pressure raises rapidly. The pressure wave strikes a compressor blades causing a knocking noise. To prevent this the ECM opens the recirculation valve which allows excessive boost pressure to vent back to the air cleaner side of the turbocharger compressor.

Specifications
Item
|
Specification
|
Coil Resistance (Ω)
| 28.3 - 31.1 [20°C (68°F)]
|
Schematic diagrams

Harness Connector

Repair procedures
1. | Turn the ignition switch OFF. |
2. | Disconnect the RCV control solenoid valve connector. |
3. | Measure resistance between the valve terminals 1 and 2. |
4. | Check that the resistance is within the specification. Specification : Refer to "Specification" |
|
1. | Turn the ignition switch OFF and disconnect the battery negative (-) cable. |
2. | Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner Assembly") |
3. | Disconnect the RCV control solenoid valve connector (A). 
|
4. | Remove the vacuum hose (A). |
5. | Remove the RCV control solenoid valve (C), after loosen mounting bolt (B). Tightening Torque : 9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft) |

|
•
| Install the component to the specified torques. |
•
| Note that internal damage may occur when the component is dropped. In this case, use it after inspecting. |
•
| Insert the sensor in the installation hole and be careful not to damage it during installation. |
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