The positive crankcase ventilation system is employed to prevent air pollution caused by blow-by gases being emitted from the crankcase.
This system supplies fresh filtered air to the crankcase through the air intake hose. Inside the crankcase, the fresh air mixes with blow-by gases, which then pass through the PCV valve into the induction system.
Hyundai Tucson (LM) 2010-2015 Service Manual: Windshield Wiper-Washer Switch Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the steering column upper and lower shrouds (A) after removing 3 screws.
Take care not to damage and scratch the shrouds and its related parts.
Take care not to damage the hook when removing the upper ...
Hyundai Tucson (LM) 2010-2015 Service Manual: Repair procedures
Inspection
[EVAP. Leakage Test]
1.
Select "Evap. Leakage Test".
2.
Proceed with the test according to the screen introductions. ...