Nissan Pathfinder (2012 year). Manual - part 342

P0461 FUEL LEVEL SENSOR

EC-817

< DTC/CIRCUIT DIAGNOSIS >

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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 

EC-817, "Diagnosis Procedure"

.

 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 

EC-952, "Fuel Pressure Check"

.

3. Remove the fuel feed hose on the fuel level sensor unit. Refer to 

FL-11

.

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 

EC-817, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358685

1.

CHECK DTC WITH COMBINATION METER

Refer to 

MWI-4, "Work Flow"

.

OK or NG

OK

>> GO TO 2.

NG

>> Go to 

MWI-34, "Component Function Check"

.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

August 2012

2012 Pathfinder

EC-818

< DTC/CIRCUIT DIAGNOSIS >

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P0462, P0463 FUEL LEVEL SENSOR

P0462, P0463 FUEL LEVEL SENSOR

Component Description

INFOID:0000000007358686

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:0000000007358687

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-835, "DTC Confirmation Procedure"

.

DTC Confirmation Procedure

INFOID:0000000007358688

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 

EC-818, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358689

1.

CHECK COMBINATION METER FUNCTION

Refer to 

MWI-4, "Work Flow"

.

OK or NG

OK

>> GO TO 2.

NG

>> Go to 

MWI-34, "Component Function Check"

.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

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.

August 2012

2012 Pathfinder

P0462, P0463 FUEL LEVEL SENSOR

EC-819

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>>

INSPECTION END

August 2012

2012 Pathfinder

EC-820

< DTC/CIRCUIT DIAGNOSIS >

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P0500 VSS

P0500 VSS

Description

INFOID:0000000007358690

ECM receives vehicle speed signals from two different paths via CAN communication line: One is from the

ABS actuator and electric unit (control unit) via the combination unit and the other is from TCM.

DTC Logic

INFOID:0000000007358691

DTC DETECTION LOGIC

NOTE:

• If DTC P0500 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.

• If DTC P0500 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to 

EC-

820, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following proce-

dure before conducting the next test.

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 10 V or more at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine.

2. Shift the selector lever to D range and wait at least for 2 seconds.

3. Drive the vehicle at least 5 seconds at 20 km/h (13 MPH) or more.

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a

road test is expected to be easier, it is unnecessary to lift the vehicle.

4. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Proceed to 

EC-820, "Diagnosis Procedure"

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000007358692

1.

CHECK DTC WITH TCM

Check DTC with TCM. Refer to 

TM-37, "CONSULT Function (TRANSMISSION)"

.

Is the inspection result normal?

YES

>> GO TO 2.

DTC No.

Trouble diagnosis

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0500

VEH SPEED SEN/CIRC
(Vehicle speed sensor)

At 20 km/h (13 MPH), ECM detects the fol-
lowing status continuously for 5 seconds or 
more: The difference between a vehicle 
speed calculated by a output speed sensor 
transmitted from TCM to ECM via CAN com-
munication and the vehicle speed indicated 
on the combination meter exceeds 15km/h 
(10 MPH).

• Harness or connector

(The CAN communication line is open 
or shorted.) 

• Combination meter
• ABS actuator and electric unit (control 

unit)

• Wheel sensor
• TCM
• Output speed sensor

August 2012

2012 Pathfinder

P0500 VSS

EC-821

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NO

>> Perform trouble shooting relevant to DTC indicated.

2.

CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Check DTC with ABS actuator and electric unit (control unit). Refer to 

BRC-138, "CONSULT Function (ABS)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform trouble shooting relevant to DTC indicated.

3.

CHECK DTC WITH COMBINATION METER

Check DTC with combination meter. Refer to 

MWI-27, "CONSULT Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Perform trouble shooting relevant to DTC indicated.

4.

CHECK OUTPUT SPEED SENSOR

Check output speed sensor. Refer to 

TM-56, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace or replace error-detected parts.

5.

CHECK WHEEL SENSOR

Check wheel sensor. Refer to 

BRC-48, "Component Inspection"

 (TYPE 1) or 

BRC-158, "Component Inspec-

tion"

 (TYPE 2).

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-37, "Intermittent Incident"

.

NO

>> Replace or replace error-detected parts.

August 2012

2012 Pathfinder

EC-822

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0506 ISC SYSTEM

P0506 ISC SYSTEM

Description

INFOID:0000000007358693

NOTE:

If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.

The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let

into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is

varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects

the actual engine speed and sends a signal to the ECM.

The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value

memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.

The optimum value stored in the ECM is determined by taking into consideration various engine conditions,

such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan

operation, etc.).

On Board Diagnosis Logic

INFOID:0000000007358694

DTC Confirmation Procedure

INFOID:0000000007358695

NOTE:

•

If the target idle speed is out of the specified value, perform 

EC-597, "Idle Air Volume Learning"

,

before conducting DTC Confirmation Procedure. For the target idle speed, refer to 

EC-956, "Idle

Speed and Ignition Timing"

.

• If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next test.

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 idle.

•

Always perform the test at a temperature above 

−

10

°

C(14

°

F).

1. Open engine hood.

2. Start engine and warm it up to normal operating temperature.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Turn ignition switch OFF and wait at least 10 seconds.

6. Start engine and run it for at least 1 minute at idle speed.

7. Check 1st trip DTC.

8. If 1st trip DTC is detected, go to 

EC-822, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358696

1.

CHECK INTAKE AIR LEAKAGE

1. Start engine and let it idle.

2. Listen for an intake air leakage after the mass air flow sensor.
OK or NG

OK

>> GO TO 2.

NG

>> Discover air leakage location and repair.

2.

REPLACE ECM

1. Stop engine.

2. Replace ECM.

3. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to

SEC-10, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

 (with intelligent key

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0506
0506

Idle speed control system 
RPM lower than expected

The idle speed is less than the target idle speed 
by 100 rpm or more.

• Electric throttle control actuator
• Intake air leak

August 2012

2012 Pathfinder

P0506 ISC SYSTEM

EC-823

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system) or 

SEC-120, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

 (without

intelligent key system).

4. Perform 

EC-596, "VIN Registration"

.

5. Perform 

EC-597, "Accelerator Pedal Released Position Learning"

.

6. Perform 

EC-597, "Throttle Valve Closed Position Learning"

.

7. Perform 

EC-597, "Idle Air Volume Learning"

.

>>

INSPECTION END

August 2012

2012 Pathfinder

EC-824

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0507 ISC SYSTEM

P0507 ISC SYSTEM

Description

INFOID:0000000007358697

NOTE:

If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.

The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let

into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is

varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects

the actual engine speed and sends a signal to the ECM.

The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value

memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.

The optimum value stored in the ECM is determined by taking into consideration various engine conditions,

such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan

operation, etc.).

On Board Diagnosis Logic

INFOID:0000000007358698

DTC Confirmation Procedure

INFOID:0000000007358699

NOTE:

•

If the target idle speed is out of the specified value, perform 

EC-597, "Idle Air Volume Learning"

,

before conducting DTC Confirmation Procedure. For the target idle speed, refer to 

EC-956, "Idle

Speed and Ignition Timing"

.

• If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting the next test.

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 idle.

•

Always perform the test at a temperature above 

−

10

°

C(14

°

F).

1. Open engine hood.

2. Start engine and warm it up to normal operating temperature.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Turn ignition switch ON.

5. Turn ignition switch OFF and wait at least 10 seconds.

6. Start engine and run it for at least 1 minute at idle speed.

7. Check 1st trip DTC.

8. If 1st trip DTC is detected, go to 

EC-824, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358700

1.

CHECK PCV HOSE CONNECTION

Confirm that PCV hose is connected correctly.
OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace malfunctioning part.

2.

CHECK INTAKE AIR LEAKAGE

1. Start engine and let it idle.

2. Listen for an intake air leakage after the mass air flow sensor.
OK or NG

OK

>> GO TO 3.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0507
0507

Idle speed control system 
RPM higher than expected

The idle speed is more than the target idle 
speed by 200 rpm or more.

• Electric throttle control actuator
• Intake air leak
• PCV system

August 2012

2012 Pathfinder