Nissan Maxima. Instruction — part 507
EC-512
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
-
Apply vacuum pressure to hose end [
−13.3 kPa (−0.136 kg/cm
3
,
−1.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
3.
CHECK REFUELING EVAP VAPOR CUT VALVE
Without CONSULT
1. Turn ignition switch OFF.
2. Remove fuel tank. Refer to
FL-10, "Removal and Installation"
.
3. Drain fuel from the tank as per the following:
-
Remove fuel gauge retainer.
-
Drain fuel from the tank using a handy pump into a fuel container.
4. Check refueling EVAP vapor cut valve for being stuck to close as per the following.
Blow air into the refueling EVAP vapor cut valve (from the end of EVAP/ORVR line hose), and check that
the air flows freely into the tank.
5. Check refueling EVAP vapor cut valve for being stuck to open as per the following.
-
Connect vacuum pump to hose end.
-
Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
-
Turn fuel tank upside down.
-
Apply vacuum pressure to hose end [
−13.3 kPa (−0.136 kg/cm
3
,
−1.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
DRAIN FILTER
JMBIA1126GB
JMBIA1126GB
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
EC-513
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.
PBIB3641E
EC-514
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
POSITIVE CRANKCASE VENTILATION
POSITIVE CRANKCASE VENTILATION
Description
INFOID:0000000010095233
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 via 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 via the
hose connecting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow via the valve.
The flow goes via 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 via
the hose connection to the air inlet tubes under all conditions.
Component Inspection
INFOID:0000000010095234
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 via the 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.
SEC921C
PBIB1588E
PBIB1589E
REFRIGERANT PRESSURE SENSOR
EC-515
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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REFRIGERANT PRESSURE SENSOR
Description
INFOID:0000000010095235
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 to voltage. The voltage signal is sent
to ECM, and ECM controls cooling fan system.
Component Function Check
INFOID:0000000010095236
Regarding Wiring Diagram information, refer to
.
1.
CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals
under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000010095237
Regarding Wiring Diagram information, refer to
.
1.
CHECK GROUND CONNECTION
1. Turn A/C switch and blower fan switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
4. Check ground connection E9. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
PBIB2657E
ECM
Voltage (V)
Connector
+
–
Terminal
Terminal
F13
39
(Refrigerant pressure
sensor signal)
40
(Sensor ground)
1.0 - 4.0
JMBIA1888ZZ
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