Nissan Pathfinder. Manual - part 535

EC-446

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

-

Apply vacuum pressure to hose end [

−13.3 kPa (−0.136 kg/cm

2

, 

−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-13, "Removal and Installation"

.

3.

CHECK REFUELING EVAP VAPOR CUT VALVE

Without CONSULT

1. Turn ignition switch OFF.

2. Remove fuel tank. Refer to 

FL-13, "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

2

, 

−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-13, "Removal and Installation"

.

JSBIA1399GB

JSBIA1399GB

REFRIGERANT PRESSURE SENSOR

EC-447

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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EC

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REFRIGERANT PRESSURE SENSOR

Component Function Check

INFOID:0000000009178378

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

>> Proceed to 

EC-448, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009178379

1.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY

1. Disconnect refrigerant pressure sensor harness connector.

2. Turn ignition switch ON.

3. Check the voltage between refrigerant pressure sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-

tor.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

3.

CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-

tor.

ECM

Voltage (V)

Connector

+

–

Terminal

F52

63

64

1.0 - 4.0

Refrigerant pressure sensor

Ground

Voltage (V)

Connector

Terminal

E244

1

Ground

Approx. 5

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E244

1

F52

96

Existed

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E244

3

F52

64

Existed

EC-448

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

REFRIGERANT PRESSURE SENSOR

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-

tor.

2. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace error-detected parts.

5.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace refrigerant pressure sensor. Refer to 

HA-38, "CONDENSER : Removal and Installation"

.

NO

>> Repair or replace error-detected parts.

Refrigerant pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E244

2

F52

63

Existed

SENSOR POWER SUPPLY2 CIRCUIT

EC-449

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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SENSOR POWER SUPPLY2 CIRCUIT

Description

INFOID:0000000009178380

ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respectively.

Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously

in the sensors belonging to the same group as the short-circuited sensor.

Sensor power supply 1

• Accelerator pedal position (APP) sensor 1

• Camshaft position (CMP) sensor (PHASE)

• Electric throttle control actuator

• Battery current sensor

NOTE:

If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.

Sensor power supply 2

• Accelerator pedal position (APP) sensor 2

• Crankshaft position (CKP) sensor (POS)

• Refrigerant pressure sensor

• EVAP control system pressure sensor

• Engine oil pressure sensor

Diagnosis Procedure

INFOID:0000000009178381

1.

CHECK SENSOR POWER SUPPLY 1

1. Turn ignition switch OFF.

2. Disconnect ECM harness connectors

3. Turn ignition switch ON.

4. Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK SENSOR POWER SUPPLY 2 CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect following sensors harness connector.

3. Check harness for short to power and short to ground, between the following terminals.

+

−

Voltage

(Approx.)

ECM

Connector

Terminal

F52

54

Ground

5 V

96

E16

103

107

ECM

Sensor

+

Name

+

Connector

Terminal

Connector

Terminal

F52

54

CKP sensor (POS)

F11

1

96

Refrigerant pressure sensor

E244

1

E16

103

APP sensor 2

E31

5

107

EVAP control system pressure sensor

B36

3

EOP sensor

F54

3