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:

    Push-button ignition switch positions
    LOCK (Normal parking position) The ignition switch can only be locked in this position. The ignition switch will be unlocked when it is pushed to the ACC position while carrying the Intelligent Key. ACC (Accessories) This position activates electrical accessories such as the radio, when the en ...

    P17Ba primary pressure solenoid
    DTC Logic DTC DETECTION LOGIC DTC CONFIRMATION PROCEDURE 1.PREPARATION BEFORE WORK If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test. >> GO TO 2. 2.CHECK DTC DETECTION 1. S ...

    Additional service when replacing ECM
    Description When replacing ECM, this procedure must be performed. Work Procedure 1.PERFORM INITIALIZATION OF NATS SYSTEM AND REGISTRATION OF ALL NATS IGNITION KEY IDS Refer to SEC-50, "BCM : Special Repair Requirement" (With intelligent key system), SEC-190, "BCM : Work Proce ...