Nissan Pathfinder (2011 year). Instruction — part 359
EC-926
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
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. Check that fuel is drained from the tank.
2. Remove fuel filler tube and hose.
3. Check one-way fuel valve for operation as per the following.
When a stick is inserted, the valve should open, when removing
stick it should close.
Never 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
Component Inspection
INFOID:0000000006244620
REFUELING EVAP VAPOR CUT VALVE
With CONSULT-III
1. Remove fuel tank. Refer to
FL-6, "Removal and Installation"
2. Drain fuel from the tank as per the following:
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-III.
3. 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.
4. Check refueling EVAP vapor cut valve for being stuck to open as per the following.
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 (
−
0.136 kg/cm
2
,
−
.93 psi)] with fuel gauge retainer
remaining open and check that the pressure is applicable.
Without CONSULT-III
SEF665U
BBIA0568E
2011 Pathfinder
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
EC-927
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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1. Remove fuel tank. Refer to
FL-6, "Removal and Installation"
2. Drain fuel from the tank as per the following:
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 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.
4. Check refueling EVAP vapor cut valve for being stuck to open as per the following.
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 (
−
0.136 kg/cm
2
,
−
.93 psi)] 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
2011 Pathfinder
EC-928
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
POSITIVE CRANKCASE VENTILATION
POSITIVE CRANKCASE VENTILATION
Description
INFOID:0000000006244621
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 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 condi-
tions.
Component Inspection
INFOID:0000000006244622
PCV (POSITIVE CRANKCASE VENTILATION) 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.
PCV VALVE VENTILATION HOSE
PBIB0062E
PBIB1588E
PBIB1589E
2011 Pathfinder
POSITIVE CRANKCASE VENTILATION
EC-929
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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1. Check hoses and hose connections for leakage.
2. Disconnect all hoses and clean with compressed air. If any hose
cannot be freed of obstructions, replace.
S-ET277
2011 Pathfinder
EC-930
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
Component Description
INFOID:0000000006244623
The refrigerant pressure sensor (1) 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:0000000006244624
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 fan switch ON.
3. Check voltage between ECM terminal 70 and ground with CON-
SULT-III or tester.
OK or NG
OK
>>
INSPECTION END
NG
>> GO TO 2.
2.
CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower fan switch OFF.
2. Turn ignition switch OFF.
3. Loosen and retighten ground screws on the body.
ALBIA0357ZZ
PBIB2657E
Voltage: 1.0 - 4.0 V
PBIB1188E
2011 Pathfinder
REFRIGERANT PRESSURE SENSOR
EC-931
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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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 (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 1
and ground with CONSULT-III 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 3 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.
BBIA0539E
ALBIA0357ZZ
Voltage: Approximately 5 V
PBIB0188E
Continuity should exist.
2011 Pathfinder
EC-932
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
REFRIGERANT PRESSURE SENSOR
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.
2. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
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.
9.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
OK or NG
OK
>> Replace refrigerant pressure sensor. Refer to
.
NG
>> Repair or replace malfunctioning part.
Continuity should exist.
2011 Pathfinder
ENGINE CONTROL SYSTEM SYMPTOMS
EC-933
< SYMPTOM DIAGNOSIS >
[VK56DE]
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SYMPTOM DIAGNOSIS
ENGINE CONTROL SYSTEM SYMPTOMS
Symptom Matrix Chart
INFOID:0000000006244633
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Refer-
ence page
HARD/NO ST
AR
T
/REST
AR
T
(EXCP
.
H
A
)
ENGINE ST
ALL
HESIT
A
TION/SURGING/FLA
T
SPOT
SP
ARK KNOCK/DET
O
NA
TION
LACK
OF POWER/
POOR
ACC
E
LERA
TION
HIGH IDL
E/LOW
IDLE
ROUG
H IDLE/HUNTING
IDLI
NG VIBRA
TION
SLOW
/NO RETURN T
O
IDLE
OVERHEA
T
S/W
A
TER TEMPERA
T
UR
E
HIGH
EXCESS
IVE F
U
E
L CONSUMP
T
IO
N
EXCESS
IVE OIL CONSUMP
T
ION
BA
TTER
Y
DEAD (UNDER CHARGE)
Warranty symptom code
AA
AB
AC
AD
AE
AF AG AH
AJ
AK
AL
AM HA
Fuel
Fuel pump circuit
1
1
2
3
2
2
2
3
2
Fuel pressure regulator system
3
3
4
4
4
4
4
4
4
4
Fuel injector circuit
1
1
2
3
2
2
2
2
Evaporative emission system
3
3
4
4
4
4
4
4
4
4
Air
Positive crankcase ventilation sys-
tem
3
3
4
4
4
4
4
4
4
4
1
Incorrect idle speed adjustment
1
1
1
1
1
Electric throttle control actuator
1
1
2
3
3
2
2
2
2
2
2
Ignition
Incorrect ignition timing adjustment
3
3
1
1
1
1
1
1
Ignition circuit
1
1
2
2
2
2
2
2
Main power supply and ground circuit
2
2
3
3
3
3
3
2
3
2011 Pathfinder
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