Nissan Altima (L32) 2007-2012 Service Manual: Positive crankcase ventilation
Description
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 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 Inspection
1.CHECK PCV VALVE
With engine running at idle, remove PCV valve from rocker cover. A properly working valve makes a hissing noise as air passes through it. A strong vacuum should be felt immediately when a finger is placed over valve inlet.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace PCV valve.
On board refueling vapor recovery (ORVR)
Description From the beginning of refueling, the air and vapor inside the fuel tank go through refueling EVAP vapor cut valve and EVAP/ORVR line to the EVAP canister. The vapor is absorbed by th ...Refrigerant pressure sensor
Description The refrigerant pressure sensor is installed at the condenser of the air conditioner system. The sensor uses an electrostatic volume pressure transducer to convert refrigerant pressure ...Other materials:
Engine coolant
Changing Engine Coolant
WARNING:
• To avoid being scalded, never change the coolant when the engine is hot.
• Wrap a thick cloth around cap and carefully remove the cap. First, turn the
cap a quarter of a turn to
release built-up pressure. Then push down and turn the cap all the way to
...
IPDM E/R (Intelligent power distribution
module engine room)
Reference Value
VALUES ON THE DIAGNOSIS TOOL
TERMINAL LAYOUT
PHYSICAL VALUES
Wiring Diagram — Coupe
Wiring Diagram — Sedan
Fail Safe
CAN COMMUNICATION CONTROL
When CAN communication with ECM and BCM is impossible, IPDM E/R performs
fail-safe c ...
Reprogramming a single HomeLink® button
To reprogram a HomeLink® Universal Transceiver
button, complete the following:
1. Press and hold the desired HomeLink® button.
DO NOT release the button.
2. The indicator light will begin to flash after
20 seconds. Without releasing the
HomeLink® button, proceed with “Programming
HomeL ...