A crankcase ventilation system is used to consume crankcasevapors created during the combustion process instead of ventingthem to the atmosphere.
Fresh air is supplied through a filter to the crankcase, thecrankcase mixes the fresh air with the blow-by gases and thenpassed through a positive crankcase ventilation-(PCV)orificed tube into the intake manifold.
The PCV orificed tube restricts the flow rate of the blow-bygases using an orifice-(1) located at the end of thetube. If abnormal operating conditions arise, the system isdesigned to allow excessive amounts of blow-by gases to back flowthrough the crankcase vent tube into the throttle body in order tobe consumed by normal combustion.
Manual HVAC Description and Operation
The air temperature and the air delivery description andoperation are divided into eight areas:HVAC Control ComponentsAir SpeedAir DeliveryHeating and A/C OperationRecirculation OperationEngine CoolantA/C CycleHVAC Control ComponentsRadio/HVAC ControlThe Radio/HVAC control contains all switches, whi ...