Hyundai Sonata LF: Emission Control System / Crankcase Emission Control System

Hyundai Sonata LF 2014-2019 Service Manual / Emission Control System / Crankcase Emission Control System

Schematic Diagrams

Schematic Diagram

Repair procedures

Inspection
1.
After disconnecting the vapor hose from the PCV valve, remove the PCV valve.
2.
Reconnect the PCV valve to the vapor hose.
3.
Inspect the PCV vlave operation.
(1)
Run the engine at idle.
(2)
Put a finger on the open end of the PCV valve.
(3)
Make sure that intake manifold vaccum can be felt.
   
The plunger inside the PCV valve will move back and forth at vacuum.

4.
If the vacuum is not felt, clean or replace the vapor hose.

Positive Crankcase Ventilation (PCV) Valve Description and Operation

Operation Principle

Positive Crankcase Ventilation (PCV) Valve Repair procedures

Removal
1.
Disconnect the PCV hose (A).
2.
Remove the PCV valve (B).

Inspection
1.
Insert a thin stick (A) into the PCV valve (B) from the threaded side to check that the plunger moves.

   
If the plunger does not move (PCV valve is clogged), clean or replace the valve.
Installation
1.
Install in the reverse order of removal.

PCV Valve installation:
7.8 ~ 11.8 N.m (0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 lb-ft)

    General Information

    Description and Operation Description Emissions Control System consists of three major systems. • Crankcase Emission Control System prevents blow-by gas from releasing into the atmosphere...

    Evaporative Emission Control System

    ..

    Other information:

    Hyundai Sonata LF 2014-2019 Service Manual: In-car Sensor Description and Operation


    Description The sensor contains a thermistor which measures the temperature of the inside. The signal decided by the resistance value which changes in accordance with perceived inside temperature, is delivered to heater control unit and according to this signal the control unit regulates incar temperature to intended value...

    Hyundai Sonata LF 2014-2019 Service Manual: Injector Repair procedures


    Inspection 1. Turn the ignition switch OFF. 2. Disconnect the injector connector. 3. Measure resistance between the injector terminals 1 and 2. 4. Check that the resistance is within the specification. Specification: Refer to “Specification” Removal     In case of removing the high pressure fuel pump, high pressure fuel pipe, delivery pipe, and injector, there may be injury caused by leakage of the high pressure fuel...

    Categories

    read more

     
    Copyright © 2026 www.hsonatalf.org