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 Owners Manual: All wheel drive (AWD)
The All Wheel Drive (AWD) System delivers engine power to all front and rear wheels for maximum traction. AWD is useful when extra traction is required on roads such slippery, muddy, wet, or snow-covered roads. Occasional off-road use such as established unpaved roads and trails are OK. It i ...

Hyundai Tucson (LM) 2010-2015 Service Manual: Engine Control Module (ECM) Schematic Diagrams
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