Nissan Juke Service and Repair Manual : Structure and operation
Positive Crankcase Ventilation
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.
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:
Periodic maintenance
IDLE SPEED
Inspection
1.CHECK IDLE SPEED
With CONSULT-III
Check idle speed in “DATA MONITOR” mode with CONSULT-III.
With GST
Check idle speed with Service $01 of GST.
Without CONSULT-III
Check idle speed by installing the pulse type tachometer clamp on the loop
wire or on suitable high ...
Precautions on cruise control
• If the cruise control system malfunctions, it will cancel automatically.
The CRUISE indicator light on the meter panel will then blink to warn the driver.
• If the engine coolant temperature becomes excessively high, the cruise control
system will cancel automatically.
• If ...
All-Wheel Drive (AWD) (if so equipped)
WARNING
• For AWD equipped vehicles, do not attempt to raise two wheels off
the ground and shift the transmission to any drive or reverse position with the
engine running. Doing so may result in drivetrain damage or unexpected vehicle movement
which could result in serious vehicle damag ...
