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Nissan Pathfinder (2010 year). Manual - part 309

EC-564

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

*: DTC P1442 and P1456 does not apply to R51 models but appears in DTC Work Support Mode screens.

Generic Scan Tool (GST) Function

INFOID:0000000005257515

DESCRIPTION

Generic Scan Tool (OBD II scan tool) complying with SAE J1978/

ISO 15031-4 has several functions explained below.

ISO15765-4 is used as the protocol.

The name GST or Generic Scan Tool is used in this service manual.

FUNCTION

Test mode

Test item

Corresponding DTC No.

Reference page

EVAPORATIVE
SYSTEM

PURG FLOW P0441

P0441

EC-708, "DTC Confirmation Procedure"

EVP SML LEAK P0442/P1442*

P0442

EC-714, "DTC Confirmation Procedure"

P0455

EC-749, "DTC Confirmation Procedure"

EVP V/S LEAK P0456/P1456*

P0456

EC-757, "DTC Confirmation Procedure"

PURG VOL CN/V P1444

P0443

EC-721, "DTC Confirmation Procedure"

A/F SEN1

A/F SEN1 (B1) P1276

P0130

EC-630, "DTC Confirmation Procedure"

A/F SEN1 (B1) P1278/P1279

P0133

EC-642, "DTC Confirmation Procedure"

A/F SEN1 (B2) P1286

P0150

EC-630, "DTC Confirmation Procedure"

A/F SEN1 (B2) P1288/P1289

P0153

EC-642, "DTC Confirmation Procedure"

HO2S2

HO2S2 (B1) P0139

P0139

EC-661, "DTC Confirmation Procedure"

HO2S2 (B1) P1146

P0138

EC-653, "DTC Confirmation Procedure"

HO2S2 (B1) P1147

P0137

EC-648, "DTC Confirmation Procedure"

HO2S2 (B2) P0159

P0159

EC-661, "DTC Confirmation Procedure"

HO2S2 (B2) P1166

P0158

EC-653, "DTC Confirmation Procedure"

HO2S2 (B2) P1167

P0157

EC-648, "DTC Confirmation Procedure"

SEF139P

Diagnostic test mode

Function

Service $01

READINESS TESTS

This diagnostic service gains access to current emission-related data values, including analog
inputs and outputs, digital inputs and outputs, and system status information.

Service $02

(FREEZE DATA)

This diagnostic service gains access to emission-related data value which were stored by
ECM during the freeze frame. For details, refer to

EC-536, "Emission-related Diagnostic Infor-

mation"

Service $03

DTCs

This diagnostic service gains access to emission-related power train trouble codes which
were stored by ECM.

Service $04

CLEAR DIAG INFO

This diagnostic service can clear all emission-related diagnostic information. This includes:
• Clear number of diagnostic trouble codes (Service $01)
• Clear diagnostic trouble codes (Service $03)
• Clear trouble code for freeze frame data (Service $01)
• Clear freeze frame data (Service $02)
• Reset status of system monitoring test (Service $01)
• Clear on board monitoring test results (Service $06 and $07)

Service $06

(ON BOARD TESTS)

This diagnostic service accesses the results of on board diagnostic monitoring tests of specific
components/systems that are not continuously monitored.

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-565

< FUNCTION DIAGNOSIS >

[VK56DE]

INSPECTION PROCEDURE

1. Turn ignition switch OFF.
2. Connect GST to data link connector (1), which is located under

LH dash panel near the hood opener handle.

• Brake pedal (2)

3. Turn ignition switch ON.

4. Enter the program according to instructions on the screen or in

the operation manual.

(*: Regarding GST screens in this section, sample screens are

shown.)

5. Perform each diagnostic service according to each service pro-

cedure.

For further information, see the GST Operation Manual of

the tool maker.

Service $07

(ON BOARD TESTS)

This diagnostic service enables the off board test drive to obtain test results for emission-re-
lated powertrain components/systems that are continuously monitored during normal driving
conditions.

Service $08

—

This diagnostic service can close EVAP system in ignition switch ON position (Engine
stopped). When this diagnostic service is performed, the EVAP canister vent control valve can
be closed.
In the following conditions, this diagnostic service cannot function.
• Low ambient temperature
• Low battery voltage
• Engine running
• Ignition switch OFF
• Low fuel temperature
• Too much pressure is applied to EVAP system

Service $09

(CALIBRATION ID)

This diagnostic service enables the off-board test device to request specific vehicle informa-
tion such as Vehicle Identification Number (VIN) and Calibration IDs.

Diagnostic test mode

Function

ALBIA0359ZZ

SEF398S

SEF416S

2010 Pathfinder

EC-566

< COMPONENT DIAGNOSIS >

[VK56DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

COMPONENT DIAGNOSIS

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Description

INFOID:0000000005257516

The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-

TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”

of “DATA MONITOR” mode is within the SP value, the Engine Control System is confirmed OK. When the

value in “SPEC” of “DATA MONITOR” mode is NOT within the SP value, the Engine Control System may have

one or more malfunctions.

The SP value is used to detect malfunctions that may affect the Engine Control System, but will not illuminate

the MIL.

The SP value will be displayed for the following three items:

• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-

tion)

• A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing Condition

INFOID:0000000005257517

• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

, 14.25 - 15.12 psi)

• Atmospheric temperature: 20 - 30

C (68 - 86

• Engine coolant temperature: 75 - 95

C (167 - 203

• Engine speed: Idle

• Transmission: Warmed-up

- After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP SE 1” (A/T

fluid temperature sensor signal) indicates more than 60

C (140

F).

• Electrical load: Not applied

- Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight

ahead.

Inspection Procedure

INFOID:0000000005257518

NOTE:

Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1. Perform

EC-506, "Basic Inspection"

2. Check that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2” and “MAS A/F SE-B1” in “SPEC” of “DATA

MONITOR” mode with CONSULT-III.

4. Check that monitor items are within the SP value.
5. If NG, go to

EC-567, "Diagnosis Procedure"

2010 Pathfinder

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-567

< COMPONENT DIAGNOSIS >

[VK56DE]

Diagnosis Procedure

INFOID:0000000005257519

OVERALL SEQUENCE

JMBIA1468GB

2010 Pathfinder

EC-568

< COMPONENT DIAGNOSIS >

[VK56DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

DETAILED PROCEDURE

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Check that the testing conditions are met. Refer to

EC-566, "Testing Condition"

3. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

NOTE:

PBIB3214E

2010 Pathfinder

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-569

< COMPONENT DIAGNOSIS >

[VK56DE]

Check “A/F ALPHA-B1”, “A/F ALPHA-B2” for approximately 1 minute because they may fluctuate. It is NG

if the indication is out of the SP value even a little.

OK or NG

>> GO TO 17.

NG (Less than the SP value)>>GO TO 2.

NG (More than the SP value)>>GO TO 3.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP

value.
OK or NG

>> GO TO 4.

NG (More than the SP value)>>GO TO 19.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP

value.
OK or NG

>> GO TO 6.

NG (More than the SP value)>>GO TO 6.

NG (Less than the SP value)>>GO TO 25.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Stop the engine.

2. Disconnect PCV hose, and then plug it.

3. Start engine.

4. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

>> GO TO 5.

>> GO TO 6.

CHANGE ENGINE OIL

1. Stop the engine.

2. Change engine oil.

NOTE:

This symptom may occur when a large amount of gasoline is mixed with engine oil because of driving

conditions (such as when engine oil temperature does not rise enough since a journey distance is too

short during winter). The symptom will not be detected after changing engine oil or changing driving con-

ditions.

INSPECTION END

CHECK FUEL PRESSURE

Check fuel pressure. (Refer to

EC-958, "Fuel Pressure Check"

OK or NG

>> GO TO 9.

NG (Fuel pressure is too high)>>Replace “fuel level sensor unit, fuel filter and fuel pump assembly”, and

then GO TO 8.

NG (Fuel pressure is too low)>>GO TO 7.

DETECT MALFUNCTIONING PART

1. Check the following.

Clogged and bent fuel hose and fuel tube

Clogged fuel filter

Fuel pump and its circuit (Refer to

EC-878, "Diagnosis Procedure"

2. If NG, repair or replace the malfunctioning part. (Refer to

EC-958, "Fuel Pressure Check"

If OK, replace “fuel level sensor unit, fuel filter and fuel pump assembly”.

2010 Pathfinder

EC-570

< COMPONENT DIAGNOSIS >

[VK56DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

>> GO TO 8.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

INSPECTION END

>> GO TO 9.

PERFORM POWER BALANCE TEST

1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.

2. Check that each cylinder produces a momentary engine speed drop.
OK or NG

>> GO TO 12.

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART

1. Check the following below.

Ignition coil and its circuit (Refer to

EC-881, "Diagnosis Procedure"

Fuel injector and its circuit (Refer to

EC-875, "Diagnosis Procedure"

Intake air leakage

Low compression pressure (Refer to

EM-159, "Compression Pressure"

2. If NG, repair or replace the malfunctioning part.

If OK, replace malfunctioning fuel injector. (It may be caused by leakage from fuel injector or clogging.)

>> GO TO 11.

11.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

INSPECTION END

>> GO TO 12.

12.

CHECK A/F SENSOR 1 FUNCTION

Perform all DTC Confirmation Procedure related with A/F sensor 1.

• For DTC P0130, P0150, refer to

EC-630, "DTC Confirmation Procedure"

• For DTC P0131, P0151, refer to

EC-634, "DTC Confirmation Procedure"

• For DTC P0132, P0152, refer to

EC-638, "DTC Confirmation Procedure"

• For DTC P0133, P0153, refer to

EC-642, "DTC Confirmation Procedure"

• For DTC P2A00, P2A03, refer to

EC-861, "DTC Confirmation Procedure"

OK or NG

>> GO TO 15.

>> GO TO 13.

13.

CHECK A/F SENSOR 1 CIRCUIT

Perform Diagnostic Procedure according to corresponding DTC.

>> GO TO 14.

14.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

2010 Pathfinder

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-571

< COMPONENT DIAGNOSIS >

[VK56DE]

INSPECTION END

>> GO TO 15.

15.

DISCONNECT AND RECONNECT ECM HARNESS CONNECTOR

1. Stop the engine.

2. Disconnect ECM harness connector.

3. Check pin terminals and connector for damage, and then reconnect it.

>> GO TO 16.

16.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”

1. Start engine.

2. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “SPEC” of “DATA MONITOR” mode, and check that each

indication is within the SP value.

OK or NG

INSPECTION END

>> Detect malfunctioning part according to

EC-947, "Symptom Matrix Chart"

17.

CHECK “B/FUEL SCHDL”

Select “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and check that the indication is within the SP

value.
OK or NG

INSPECTION END

NG (More than the SP value)>>GO TO 18.

NG (Less than the SP value)>>GO TO 25.

18.

DETECT MALFUNCTIONING PART

1. Check for the cause of large engine friction. Refer to the following.

Engine oil level is too high

Engine oil viscosity

Belt tension of power steering, alternator, A/C compressor, etc. is excessive

Noise from engine

Noise from transmission, etc.

2. Check for the cause of insufficient combustion. Refer to the following.

Valve clearance malfunction

Intake valve timing control function malfunction

Camshaft sprocket installation malfunction, etc.

>> Repair or replace malfunctioning part, and then GO TO 30.

19.

CHECK INTAKE SYSTEM

Check for the cause of uneven air flow through mass air flow sensor. Refer to the following.

• Crushed air ducts

• Malfunctioning seal of air cleaner element

• Uneven dirt of air cleaner element

• Improper specification of intake air system
OK or NG

>> GO TO 21.

>> Repair or replace malfunctioning part, and then GO TO 20.

20.

CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”, AND “B/FUEL SCHDL”

Select “A/F ALPHA-B1”, “A/F ALPHA-B2”, and “B/FUEL SCHDL” in “SPEC” of “DATA MONITOR” mode, and

check that each indication is within the SP value.
OK or NG

INSPECTION END

NG (“B/FUEL SCHDL” is more, “A/F ALPHA-B1”, “A/F ALPHA-B2” are less than the SP value)>>GO TO 21.

21.

DISCONNECT AND RECONNECT MASS AIR FLOW SENSOR HARNESS CONNECTOR

2010 Pathfinder

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