Nissan Sentra B18 (2020-2025) Service Manual: Structure and Operation
Positive Crankcase Ventilation
Structure and Operation
This system returns blow-by gas to the intake manifold.The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intakemanifold.
During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV valve.
Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air.The ventilating air is drawn from the air inlet tubes into the crankcase. In this process the air passes throughthe hose connecting air inlet tubes to rocker cover. Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.The flow goes through the hose connection in the reverse direction.
Component Parts
Engine Control System
Component Parts Location
Component Parts Location
ENGINE ROOM COMPARTMENT
...
System
Engine Control System
System Description
System Description
SYSTEM DIAGRAM
SYSTEM DESCRIPTION
The adopted system enables comprehensive engine control.
ECM (engine co ...
Other materials:
Exploded View
Exploded View
STANDARD ROOF
1.
Front room/map lamp assembly
bracket
2.
Headlining
3.
...
Cold weather driving
Freeing a frozen door lock
To help prevent the door locks of your Nissan Sentra from freezing in cold weather,
apply a suitable de-icing agent directly into the keyhole. If a lock does become
frozen, gently warm the mechanical key before inserting it into the keyhole. As
an alternative, use t ...
Headlamp (hi)
Component Inspection
Component Inspection
CHECK HEADLAMP (HI)
Ignition switch OFF.
Disconnect front combination lamp connector.
Check continuity betw ...
