Nissan Pathfinder (2012 year). Manual — part 292
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
EC-417
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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2.
CHECK IF EVAP CANISTER IS SATURATED WITH WATER
Does water drain from the EVAP canister?
Yes or No
Yes
>> GO TO 3.
No
>> GO TO 6.
3.
REPLACE EVAP CANISTER
Replace EVAP canister with a new one. Refer to
FL-16, "Removal and Installation"
>> GO TO 4.
4.
CHECK DRAIN FILTER
EC-419, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace drain filter. Refer to
.
5.
DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.
>> Repair or replace EVAP hose.
6.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-419, "Component Inspection"
OK or NG
OK
>>
INSPECTION END
NG
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
FL-6, "Removal and Installation"
SYMPTOM: CANNOT REFUEL/FUEL ODOR FROM THE FUEL FILLER OPENING IS STRONG
WHILE REFUELING.
1.
CHECK EVAP CANISTER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached. Refer to
FL-16, "Removal and Installation"
.
2. Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.0 kg (4.4 lb).
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK IF EVAP CANISTER IS SATURATED WITH WATER
BBIA0558E
August 2012
2012 Pathfinder
EC-418
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Does water drain from the EVAP canister?
Yes or No
Yes
>> GO TO 3.
No
>> GO TO 6.
3.
REPLACE EVAP CANISTER
Replace EVAP canister with a new one. Refer to
FL-16, "Removal and Installation"
>> GO TO 4.
4.
CHECK DRAIN FILTER
EC-419, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace drain filter. Refer to
.
5.
DETECT MALFUNCTIONING PART
Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.
>> Repair or replace EVAP hose.
6.
CHECK VENT HOSES AND VENT TUBES
Check hoses and tubes between EVAP canister and refueling control valve for clogging, kinks, looseness and
improper connection.
OK or NG
OK
>> GO TO 7.
NG
>> Repair or replace hoses and tubes.
7.
CHECK FILLER NECK TUBE
Check recirculation line for clogging, dents and cracks.
OK or NG
OK
>> GO TO 8.
NG
>> Replace filler neck tube.
8.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-419, "Component Inspection"
OK or NG
OK
>> GO TO 9.
NG
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
FL-6, "Removal and Installation"
.
9.
CHECK FUEL FILLER TUBE
Check filler neck tube and hose connected to the fuel tank for clogging, dents and cracks.
OK or NG
OK
>> GO TO 10.
NG
>> Replace fuel filler tube.
10.
CHECK ONE-WAY FUEL VALVE-I
Check one-way valve for clogging.
OK or NG
OK
>> GO TO 11.
BBIA0558E
August 2012
2012 Pathfinder
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
EC-419
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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NG
>> Repair or replace one-way fuel valve with fuel tank. Refer to
FL-6, "Removal and Installation"
.
11.
CHECK ONE-WAY FUEL VALVE-II
1. Make sure that fuel is drained from the tank.
2. Remove fuel filler tube and hose.
3. Check one-way fuel valve for operation as follows.
When a stick is inserted, the valve should open, when removing
stick it should close.
Do not drop any material into the tank.
OK or NG
OK
>>
INSPECTION END
NG
>> Replace fuel filler tube or replace one-way fuel valve
with fuel tank. Refer to
FL-6, "Removal and Installation"
.
Component Inspection
INFOID:0000000007358380
REFUELING EVAP VAPOR CUT VALVE
With CONSULT
1. Remove fuel tank. Refer to
FL-6, "Removal and Installation"
2. Drain fuel from the tank as follows:
a. Remove fuel feed hose located on the fuel gauge retainer.
b. Connect a spare fuel hose, one side to fuel gauge retainer where the hose was removed and the other
side to a fuel container.
c. Drain fuel using “FUEL PUMP RELAY” in “ACTIVE TEST” mode with CONSULT.
3. Check refueling EVAP vapor cut valve for being stuck to close as follows.
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.
4. Check refueling EVAP vapor cut valve for being stuck to open as follows.
a. Connect vacuum pump to hose end.
b. Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
c. Turn fuel tank upside down.
d. Apply vacuum pressure to hose end [
−
13.3 kPa (
−
100 mmHg,
−
3.94 inHg)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
Without CONSULT
SEF665U
BBIA0568E
August 2012
2012 Pathfinder
EC-420
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
1. Remove fuel tank. Refer to
FL-6, "Removal and Installation"
2. Drain fuel from the tank as follows:
a. Remove fuel gauge retainer.
b. Drain fuel from the tank using a handy pump into a fuel container.
3. Check refueling EVAP vapor cut valve for being stuck to close as follows.
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.
4. Check refueling EVAP vapor cut valve for being stuck to open as follows.
a. Connect vacuum pump to hose end.
b. Remove fuel gauge retainer with fuel gauge unit.
Always replace O-ring with new one.
c.
Turn fuel tank upside down.
d. Apply vacuum pressure to hose end [
−
13.3 kPa (
−
100 mmHg,
−
3.94 inHg)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
DRAIN FILTER
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. Refer to
.
BBIA0568E
PBIB3641E
August 2012
2012 Pathfinder
POSITIVE CRANKCASE VENTILATION
EC-421
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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POSITIVE CRANKCASE VENTILATION
Description
INFOID:0000000007358381
SYSTEM 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 venti-
lating 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 hoseconnection to the air inlet tubes under all condi-
tions.
Component Inspection
INFOID:0000000007358382
PCV (POSITIVE CRANKCASE VENTILATION) VALVE
With engine running at idle, remove PCV valve from rocker cover.
Refer to
. 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.
SEC921C
PBIB1588E
PBIB1589E
August 2012
2012 Pathfinder
EC-422
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
POSITIVE CRANKCASE VENTILATION
PCV VALVE VENTILATION HOSE
1. Check hoses and hose connections for leaks.
2. Disconnect all hoses and clean with compressed air. If any
hosecannot be freed of obstructions, replace. Refer to
S-ET277
August 2012
2012 Pathfinder
REFRIGERANT PRESSURE SENSOR
EC-423
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
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REFRIGERANT PRESSURE SENSOR
Component Description
INFOID:0000000007358383
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.
Diagnosis Procedure
INFOID:0000000007358384
1.
CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower switch ON.
3. Check voltage between ECM terminal 70 and ground with CON-
SULT or tester.
OK or NG
OK
>>
INSPECTION END
NG
>> GO TO 2.
2.
CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower switch OFF.
2. Turn ignition switch OFF.
3. Loosen and retighten three ground screws on the body. Refer to
BBIA0564E
PBIB2657E
Voltage: 1.0 - 4.0V
PBIB1188E
BBIA0539E
August 2012
2012 Pathfinder
EC-424
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE]
REFRIGERANT PRESSURE SENSOR
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace ground connections.
3.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 3
and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors.
5.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 1 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
BBIA0564E
Voltage: Approximately 5V
PBIB1872E
Continuity should exist.
August 2012
2012 Pathfinder
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