Hyundai Elantra (CN7): 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
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Specification
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Coil Resistance (Ω)
| 28.3 - 31.1 [20°C (68°F)]
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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" |
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| 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) |
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| •
| 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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Description and operation
DesrcriptionThe Electric Waste Gate Actuator(EWGA) is installed on the turbocharger. EWGA operates vain in west gate turbocharger and controls the compressed air by PWM signal of ECM.
Description and operation
DescriptionIntegrated Thermal Management Module (ITM) is a device that controls the coolant flow rate according to coolant temperature.
Other information:
TroubleshootingProblem Symptoms TableBefore replacing or repairing air conditioning components, first determine if the malfunction is due to the refrigerant charge, air flow or compressor.Use the table below to help you find the cause of the problem. The numbers indicate the priority of the likely cause of the problem.
Repair procedures
Replacement1.Disconnect the negative (-) battery terminal. 2.Remove the heater and blower assembly.(Refer to Heater - "Heater Unit") 3.Remove the heater core cover (A) after loosening the mounting screws.4.Pull out the evaporator core (A) from the heater unit.
