Hyundai Tucson: Crankcase Emission Control System / 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.
Run the engine at idle, then put a finger over the open end of the PCV valve and make sure that intake manifold vacuum can be felt.
   
The plunger inside the PCV valve will move back and forth at vacuum.

4.
If the vacuum is not felt inspect PCV operation, if operating correctly clean or replace the vapor hose.
Schematic Diagrams
Schematic Diagram ...

Positive Crankcase Ventilation (PCV) Valve Description and Operation
Operation Principle ...

Other information:

Hyundai Tucson (LM) 2010-2015 Service Manual: Variable Intake Solenoid (VIS) Valve Schematic Diagrams
Circuit Diagram (M/T) (A/T) ...

Hyundai Tucson (LM) 2010-2015 Owners Manual: All Wheel Drive (AWD) mode selection
WARNING If AWD warning light ( ) stays on the instrument cluster, your vehicle may have a malfunction with the AWD system. When the AWD warning light () illuminates have your vehicle checked by an authorized HYUNDAI dealer as soon as possible. CAUTION When driving on normal roads, deactiv ...

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