Nissan Maxima. Manual - 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 

FL-10, "Exploded View"

.

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 

FL-10, "Exploded View"

.

DRAIN FILTER

JMBIA1126GB

JMBIA1126GB

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-513

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[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

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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 

EC-554, "Wiring Diagram"

.

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 

EC-515, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010095237

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

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 

GI-44, "Circuit Inspection"

.

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