Nissan Juke Service and Repair Manual : Structure and operation

Positive Crankcase Ventilation

This system returns blow-by gas to the intake manifold.


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 intake manifold.

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 then drawn from the air inlet tubes into the crankcase. In this process the air passes through the 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.

On vehicles with an excessively high blow-by, the valve does not meet the requirement. This is because some of the flow will go through the hose connection to the air inlet tubes under all conditions.

System


    Component parts
    Engine control system : Component Parts Location 1. IPDM E/R Refer to PCS-5, "Component Parts Location". 2. Battery current sensor (with battery temperature sensor) 3. Mass air flow ...

    System
    Engine control system : System Diagram Engine control system : System Description ECM performs various controls such as fuel injection control and ignition timing control. MULTIPORT FUEL INJE ...

    Other materials:

    U0140 lost communication (BCM)
    Description CAN (Controller Area Network) is a serial communication line for real-time application. It is an on-vehicle multiplex communication line with high data communication speed and excellent malfunction detection ability. Many electronic control units are equipped onto a vehicle, and ...

    To protect your vehicle from corrosion
    • Wash and wax your vehicle often to keep the vehicle clean.• • Always check for minor damage to the paint and repair it as soon as possible.• •  Keep drain holes at the bottom of the doors open to avoid water accumulation.• • Check the underbody for accumulation of sand, di ...

    P183B solenoid power supply
    DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.PRECONDITIONING If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test. >> GO TO 2. 2.DTC REPRODUCTION PROCEDURE W ...