Nissan Pathfinder (2011 year). Manual — part 343
EC-798
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0456 EVAP CONTROL SYSTEM
OK
>> GO TO 17.
NG
>> GO TO 15.
15.
CHECK VACUUM HOSE
Check vacuum hoses for clogging or disconnection. Refer to
.
OK or NG
OK
>> GO TO 16.
NG
>> Repair or reconnect the hose.
16.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-763, "Component Inspection"
OK or NG
OK
>> GO TO 17.
NG
>> Replace EVAP canister purge volume control solenoid valve. Refer to
.
17.
CHECK FUEL TANK TEMPERATURE SENSOR
EC-717, "Component Inspection"
OK or NG
OK
>> GO TO 18.
NG
>> Replace “fuel level sensor unit and fuel pump”. Refer to
18.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-775, "Component Inspection"
OK or NG
OK
>> GO TO 19.
NG
>> Replace EVAP control system pressure sensor. Refer to
FL-16, "Removal and Installation"
.
19.
CHECK EVAP PURGE LINE
Check EVAP purge line (pipe, rubber tube, fuel tank and EVAP canister) for cracks or improper connection.
.
OK or NG
OK
>> GO TO 20.
NG
>> Repair or reconnect the hose.
20.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 21.
21.
CHECK EVAP/ORVR LINE
Check EVAP/ORVR line between EVAP canister and fuel tank for clogging, kinks, looseness and improper
connection. For location, refer to
.
OK or NG
OK
>> GO TO 22.
NG
>> Repair or replace hoses and tubes.
22.
CHECK RECIRCULATION LINE
Check recirculation line between filler neck tube and fuel tank for clogging, kinks, cracks, looseness and
improper connection.
OK or NG
OK
>> GO TO 23.
NG
>> Repair or replace hose, tube or filler neck tube.
23.
CHECK REFUELING EVAP VAPOR CUT VALVE
EC-926, "Component Inspection"
OK or NG
OK
>> GO TO 24.
2011 Pathfinder
P0456 EVAP CONTROL SYSTEM
EC-799
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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NG
>> Replace refueling EVAP vapor cut valve with fuel tank. Refer to
FL-16, "Removal and Installation"
24.
CHECK FUEL LEVEL SENSOR
.
OK or NG
OK
>> GO TO 25.
NG
>> Replace “fuel level sensor unit and fuel pump”. Refer to
25.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000006244441
FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)
1. Wipe clean valve housing.
2. Check valve opening pressure and vacuum.
3. If out of specification, replace fuel filler cap as an assembly.
CAUTION:
Use only a genuine fuel filler cap as a replacement. If an incor-
rect fuel filler cap is used, the MIL may illuminate.
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
SEF445Y
Pressure: 15.3 - 20.0 kPa (0.156 - 0.204 kg/cm
2
, 2.22 -
2.90 psi)
Vacuum:
−
6.0 to
−
3.3 kPa (
−
0.061 to
−
0.034 kg/cm
2
,
−
0.87 to
−
0.48 psi)
SEF943S
PBIB3641E
2011 Pathfinder
EC-800
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0460 FUEL LEVEL SENSOR
P0460 FUEL LEVEL SENSOR
Component Description
INFOID:0000000006244442
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the combination meter. The combination meter sends the fuel level
sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnosis Logic
INFOID:0000000006244443
NOTE:
•
If DTC P0460 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
•
If DTC P0460 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
EC-819, "DTC Confirmation Procedure"
.
When the vehicle is parked, the fuel level in the fuel tank is naturally stable. It means that output signal of the
fuel level sensor does not change. If ECM senses sloshing signal from the sensor, fuel level sensor malfunc-
tion is detected.
DTC Confirmation Procedure
INFOID:0000000006244444
1. If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c.
Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and wait maximum of 2 consecutive minutes.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000006244445
1.
CHECK COMBINATION METER FUNCTION
.
OK or NG
OK
>> GO TO 2.
NG
>> Go to
MWI-34, "Component Function Check"
.
2.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
BBIA0529E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0460
0460
Fuel level sensor circuit
noise
Even though the vehicle is parked, a signal
being varied is sent from the fuel level sensor
to ECM.
• Harness or connectors
(The CAN communication line is open or
shorted)
• Harness or connectors
(The sensor circuit is open or shorted)
• Combination meter
• Fuel level sensor
2011 Pathfinder
P0460 FUEL LEVEL SENSOR
EC-801
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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>>
INSPECTION END
2011 Pathfinder
EC-802
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0461 FUEL LEVEL SENSOR
P0461 FUEL LEVEL SENSOR
Component Description
INFOID:0000000006244446
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the combination meter. The combination meter sends the fuel level
sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnosis Logic
INFOID:0000000006244447
NOTE:
•
If DTC P0461 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
•
If DTC P0461 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
EC-819, "DTC Confirmation Procedure"
.
Driving long distances naturally affect fuel gauge level.
This diagnosis detects the fuel gauge malfunction of the gauge not moving even after a long distance has
been driven.
Overall Function Check
INFOID:0000000006244448
Use this procedure to check the overall function of the fuel level sensor. During this check, a 1st trip DTC
might not be confirmed.
WARNING:
When performing the following procedure, always observe the handling of the fuel. Refer to
TESTING CONDITION:
Before starting overall function check, preparation of draining fuel and refilling fuel is required.
WITH CONSULT-III
NOTE:
Start from step 10, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/
8 Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line, refer to
.
3. Remove the fuel feed hose on the fuel level sensor unit. Refer to
.
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch OFF and wait at least 10 seconds then turn ON.
6. Select “FUEL LEVEL SE” in “DATA MONITOR” mode with CONSULT-III.
7. Check “FUEL LEVEL SE” output voltage and note it.
8. Select “FUEL PUMP” in “ACTIVE TEST” mode with CONSULT-III.
9. Touch “ON” and drain fuel approximately 30 (7-7/8 US gal, 6-5/8 Imp gal) and stop it.
10. Check “FUEL LEVEL SE” output voltage and note it.
11. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
12. Check “FUEL LEVEL SE” output voltage and note it.
BBIA0529E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0461
0461
Fuel level sensor circuit
range/performance
The output signal of the fuel level sensor
does not change within the specified range
even though the vehicle has been driven a
long distance.
• Harness or connectors
(The CAN communication line is open or
shorted)
• Harness or connectors
(The sensor circuit is open or shorted)
• Combination meter
• Fuel level sensor
2011 Pathfinder
P0461 FUEL LEVEL SENSOR
EC-803
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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13. Confirm whether the voltage changes more than 0.03V during step 7 to 10 and 10 to 12.
If NG, go to
WITH GST
NOTE:
Start from step 8, if it is possible to confirm that the fuel cannot be drained by 30 (7-7/8 US gal, 6-5/8
Imp gal) in advance.
1. Prepare a fuel container and a spare hose.
2. Release fuel pressure from fuel line. Refer to
.
3. Remove the fuel feed hose on the fuel level sensor unit. Refer to
4. Connect a spare fuel hose where the fuel feed hose was removed.
5. Turn ignition switch ON.
6. Drain fuel by 30 (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.
7. Confirm that the fuel gauge indication varies.
8. Fill fuel into the fuel tank for 30 (7-7/8 US gal, 6-5/8 Imp gal).
9. Confirm that the fuel gauge indication varies.
10. If NG, go to
Diagnosis Procedure
INFOID:0000000006244449
1.
CHECK DTC WITH COMBINATION METER
.
OK or NG
OK
>> GO TO 2.
NG
>> Go to
MWI-34, "Component Function Check"
.
2.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
2011 Pathfinder
EC-804
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0462, P0463 FUEL LEVEL SENSOR
P0462, P0463 FUEL LEVEL SENSOR
Component Description
INFOID:0000000006244450
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the combination meter. The combination meter sends the fuel level
sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnosis Logic
INFOID:0000000006244451
NOTE:
•
If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC
UXXXX.
•
If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC
P0607. Refer to
EC-819, "DTC Confirmation Procedure"
.
DTC Confirmation Procedure
INFOID:0000000006244452
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at ignition
switch ON.
1. Turn ignition switch ON.
2. Wait at least 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000006244453
1.
CHECK COMBINATION METER FUNCTION
.
OK or NG
OK
>> GO TO 2.
NG
>> Go to
MWI-34, "Component Function Check"
.
2.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
BBIA0529E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0462
0462
Fuel level sensor circuit
low input
An excessively low voltage from the sensor is
sent to ECM.
• Harness or connectors
(The CAN communication line is open or
shorted)
• Harness or connectors
(The sensor circuit is open or shorted)
• Combination meter
• Fuel level sensor
P0463
0463
Fuel level sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
2011 Pathfinder
P0462, P0463 FUEL LEVEL SENSOR
EC-805
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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>>
INSPECTION END
2011 Pathfinder
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