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Nissan Pathfinder (2009 year). Manual - part 258

EC-78

< FUNCTION DIAGNOSIS >

[VQ40DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

FUEL T/TMP SE

C or

• The fuel temperature (determined by the signal

voltage of the fuel tank temperature sensor) is dis-
played.

INT/A TEMP SE

C or

• The intake air temperature (determined by the sig-

nal voltage of the intake air temperature sensor) is
indicated.

EVAP SYS PRES

FUEL LEVEL SE

START SIGNAL

ON/OFF

• Indicates start signal status [ON/OFF] computed by

the ECM according to the signals of engine speed
and battery voltage.

• After starting the engine, [OFF] is dis-

played regardless of the starter signal.

CLSD THL POS

ON/OFF

• Indicates idle position [ON/OFF] computed by ECM

according to the accelerator pedal position sensor
signal.

AIR COND SIG

ON/OFF

• Indicates [ON/OFF] condition of the air conditioner

switch as determined by the air conditioner signal.

P/N POSI SW

ON/OFF

• Indicates [ON/OFF] condition from the park/neutral

position (PNP) switch signal.

PW/ST SIGNAL

ON/OFF

• [ON/OFF] condition of the power steering system

(determined by the signal voltage of the power
steering pressure sensor signal) is indicated.

LOAD SIGNAL

ON/OFF

• Indicates [ON/OFF] condition from the electrical

load signal.
ON: Rear window defogger switch is ON and/or
lighting switch is in 2nd position.
OFF: Both rear window defogger switch and light-
ing switch are OFF.

IGNITION SW

ON/OFF

• Indicates [ON/OFF] condition from ignition switch

signal.

HEATER FAN SW

ON/OFF

• Indicates [ON/OFF] condition from the heater fan

switch signal.

BRAKE SW

ON/OFF

• Indicates [ON/OFF] condition from the stop lamp

switch signal.

INJ PULSE-B1

msec

• Indicates the actual fuel injection pulse width com-

pensated by ECM according to the input signals.

• When the engine is stopped, a certain

computed value is indicated.

INJ PULSE-B2

msec

IGN TIMING

BTDC

• Indicates the ignition timing computed by ECM ac-

cording to the input signals.

• When the engine is stopped, a certain

value is indicated.

CAL/LD VALUE

• Calculated load value indicates the value of the

current air flow divided by peak air flow.

MASS AIRFLOW

g·m/s

• Indicates the mass air flow computed by ECM ac-

cording to the signal voltage of the mass air flow
sensor.

PURG VOL C/V

• Indicates the EVAP canister purge volume control

solenoid valve control value computed by the ECM
according to the input signals.

• The opening becomes larger as the value increas-

es.

INT/V TIM (B1)

• Indicates [

CA] of intake camshaft advanced angle.

INT/V TIM (B2)

INT/V SOL (B1)

• The control condition of the intake valve timing con-

trol solenoid valve (determined by ECM according
to the input signals) is indicated.

• The advance angle becomes larger as the value in-

creases.

INT/V SOL (B2)

Monitored item

Unit

Description

Remarks

2009 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-79

< FUNCTION DIAGNOSIS >

[VQ40DE]

VIAS S/V-1

ON/OFF

• The control condition of the VIAS control solenoid

valve (determined by ECM according to the input
signals) is indicated.
ON: VIAS control solenoid valve is operating.
OFF: VIAS control solenoid valve is not operating.

AIR COND RLY

ON/OFF

• The air conditioner relay control condition (deter-

mined by ECM according to the input signals) is in-
dicated.

FUEL PUMP RLY

ON/OFF

• Indicates the fuel pump relay control condition de-

termined by ECM according to the input signals.

VENT CONT/V

ON/OFF

• The control condition of the EVAP canister vent

control valve (determined by ECM according to the
input signals) is indicated.
ON: Closed
OFF: Open

THRTL RELAY

ON/OFF

• Indicates the throttle control motor relay control

condition determined by the ECM according to the
input signals.

COOLING FAN

HI/LOW/

OFF

• The control condition of the cooling fan (deter-

mined by ECM according to the input signals) is in-
dicated.
HI: High speed operation
LOW: Low speed operation
OFF: Stop

HO2S2 HTR (B1)

ON/OFF

• Indicates [ON/OFF] condition of heated oxygen

sensor 2 heater determined by ECM according to
the input signals.

HO2S2 HTR (B2)

ON/OFF

I/P PULLY SPD

rpm

• Indicates the engine speed computed from the tur-

bine revolution sensor signal.

VEHICLE SPEED

km/h or

mph

• Indicates the vehicle speed computed from the rev-

olution sensor signal.

IDL A/V LEARN

YET/

CMPLT

• Displays the condition of idle air volume learning

YET: Idle air volume learning has not been per-
formed yet.
CMPLT: Idle air volume learning has already been
performed successfully.

TRVL AFTER MIL

km or

mile

• Distance traveled while MIL is activated.

A/F S1 HTR (B1)

• Air fuel ratio (A/F) sensor 1 heater control value

computed by ECM according to the input signals.

• The current flow to the heater becomes larger as

the value increases.

A/F S1 HTR (B2)

AC PRESS SEN

• The signal voltage from the refrigerant pressure

sensor is displayed.

VHCL SPEED SE

km/h or

mph

• The vehicle speed computed from the vehicle

speed signal sent from TCM is displayed.

SET VHCL SPD

km/h or

mph

• The preset vehicle speed is displayed.

MAIN SW

ON/OFF

• Indicates [ON/OFF] condition from MAIN switch

signal.

CANCEL SW

ON/OFF

• Indicates [ON/OFF] condition from CANCEL switch

signal.

RESUME/ACC SW

ON/OFF

• Indicates [ON/OFF] condition from RESUME/AC-

CELERATE switch signal.

SET SW

ON/OFF

• Indicates [ON/OFF] condition from SET/COAST

switch signal.

Monitored item

Unit

Description

Remarks

2009 Pathfinder

EC-80

< FUNCTION DIAGNOSIS >

[VQ40DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

NOTE:

Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

ACTIVE TEST MODE

Test Item

BRAKE SW1

ON/OFF

• Indicates [ON/OFF] condition from ASCD brake

switch signal.

BRAKE SW2

ON/OFF

• Indicates [ON/OFF] condition of stop lamp switch

signal.

VHCL SPD CUT

NON/

CUT

• Indicates the vehicle cruise condition.

NON: Vehicle speed is maintained at the ASCD set
speed.
CUT: Vehicle speed increased to excessively high
compared with the ASCD set speed, and ASCD op-
eration is cut off.

LO SPEED CUT

NON/

CUT

• Indicates the vehicle cruise condition.

NON: Vehicle speed is maintained at the ASCD set
speed.
CUT: Vehicle speed decreased to excessively low
compared with the ASCD set speed, and ASCD op-
eration is cut off.

AT OD MONITOR

ON/OFF

• Indicates [ON/OFF] condition of A/T O/D according

to the input signal from the TCM.

AT OD CANCEL

ON/OFF

• Indicates [ON/OFF] condition of A/T O/D cancel

signal sent from the TCM.

CRUISE LAMP

ON/OFF

• Indicates [ON/OFF] condition of CRUISE lamp de-

termined by the ECM according to the input sig-
nals.

SET LAMP

ON/OFF

• Indicates [ON/OFF] condition of SET lamp deter-

mined by the ECM according to the input signals.

ALT DUTY

• Indicates the duty ratio of the power generation

command value. The ratio is calculated by ECM
based on the battery current sensor signal.

BAT CUR SEN

• The signal voltage of battery current sensor is dis-

played.

ALT DUTY SIG

ON/OFF

• The control condition of the power generation volt-

age variable control (determined by ECM accord-
ing to the input signals) is indicated.
ON: Power generation voltage variable control is
active
OFF: Power generation voltage variable control is
inactive.

A/F ADJ-B1

—

• Indicates the correction factor saved in ECM. The

factor is calculated from the difference between the
target air-fuel ratio saved in ECM and the air-fuel
ratio calculated from A/F sensor 1 signal.

A/F ADJ-B2

—

Monitored item

Unit

Description

Remarks

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

• Engine: Return to the original

non-standard condition

• Change the amount of fuel injec-

tion using CONSULT-III.

If malfunctioning symptom disap-
pears, see CHECK ITEM.

• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1

IGNITION TIM-
ING

• Engine: Return to the original

non-standard condition

• Timing light: Set
• Retard the ignition timing using

CONSULT-III.

If malfunctioning symptom disap-
pears, see CHECK ITEM.

• Perform Idle Air Volume Learning.

2009 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-81

< FUNCTION DIAGNOSIS >

[VQ40DE]

*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE

SRT STATUS Mode

For details, refer to

EC-53, "Emission-related Diagnostic Information"

SRT Work Support Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

DTC Work Support Mode

POWER BAL-
ANCE

• Engine: After warming up, idle the

engine.

• A/C switch: OFF
• Shift lever: P or N
• Cut off each fuel injector signal

one at a time using CONSULT-III.

Engine runs rough or stops.

• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil

COOLING FAN*

• Ignition switch: ON
• Turn the cooling fan HI, LOW and

OFF using CONSULT-III.

Cooling fan moves and stops.

• Harness and connectors
• Cooling fan motor
• IPDM E/R

ENG COOLANT
TEMP

• Engine: Return to the original

non-standard condition

• Change the engine coolant tem-

perature using CONSULT-III.

If malfunctioning symptom disap-
pears, see CHECK ITEM.

• Harness and connectors
• Engine coolant temperature sen-

sor

• Fuel injector

FUEL PUMP RE-
LAY

• Ignition switch: ON (Engine

stopped)

• Turn the fuel pump relay ON and

OFF using CONSULT-III and lis-
ten to operating sound.

Fuel pump relay makes the operat-
ing sound.

• Harness and connectors
• Fuel pump relay

VIAS SOL VALVE

• Ignition switch: ON
• Turn solenoid valve ON and OFF

with CONSULT-III and listen for
operating sound.

Solenoid valve makes an operating
sound.

• Harness and connectors
• Solenoid valve

PURG VOL
CONT/V

• Engine: After warming up, run en-

gine at 1,500 rpm.

• Change the EVAP canister purge

volume control solenoid valve
opening percent using CON-
SULT-III.

Engine speed changes according to
the opening percent.

• Harness and connectors
• Solenoid valve

FUEL/T TEMP
SEN

• Change the fuel tank temperature using CONSULT-III.

VENT CON-
TROL/V

• Ignition switch: ON (Engine

stopped)

• Turn solenoid valve ON and OFF

with the CONSULT-III and listen
to operating sound.

Solenoid valve makes an operating
sound.

• Harness and connectors
• Solenoid valve

V/T ASSIGN AN-
GLE

• Engine: Return to the original

non-standard condition

• Change intake valve timing using

CONSULT-III.

If malfunctioning symptom disap-
pears, see CHECK ITEM.

• Harness and connectors
• Intake valve timing control sole-

noid valve

ALTERNATOR
DUTY

• Engine: Idle
• Change duty ratio using CON-

SULT-III.

Battery voltage changes.

• Harness and connectors
• IPDM E/R
• Alternator

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

2009 Pathfinder

EC-82

< FUNCTION DIAGNOSIS >

[VQ40DE]

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:0000000004297262

DESCRIPTION

Generic Scan Tool (OBDII scan tool) complying with SAE J1978 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 SYS-
TEM

EVP SML LEAK P0442/P1442*

P0442

EC-231

P0455

EC-267

EVP V/S LEAK P0456/P1456*

P0456

EC-274

PURG VOL CN/V P1444

P0443

EC-238

PURG FLOW P0441

P0441

EC-226

A/F SEN1

A/F SEN1 (B1) P1278/P1279

P0133

EC-156

A/F SEN1 (B1) P1276

P0130

EC-144

A/F SEN1 (B2) P1288/P1289

P0153

EC-156

A/F SEN1 (B2) P1286

P0150

EC-144

HO2S2

HO2S2 (B1) P1146

P0138

EC-167

HO2S2 (B1) P1147

P0137

EC-161

HO2S2 (B1) P0139

P0139

EC-175

HO2S2 (B2) P1166

P0158

EC-167

HO2S2 (B2) P1167

P0157

EC-161

HO2S2 (B2) P0159

P0159

EC-175

SEF139P

Diagnostic test mode

Function

Service $01

READINESS TESTS

This diagnostic service gains access to current emission-related data values, including an-
alog 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 that were saved by
ECM during the freeze frame. For details, refer to

EC-53, "Emission-related Diagnostic In-

formation"

Service $03

DTCs

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

Service $04

CLEAR DIAG INFO

This diagnostic service can clear all emission-related diagnostic information. This in-
cludes:
• 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.

2009 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-83

< FUNCTION DIAGNOSIS >

[VQ40DE]

INSPECTION PROCEDURE

Turn ignition switch OFF.

Connect GST to data link connector, which is located under LH
dash panel near the hood opener handle.

Turn ignition switch ON.

Enter the program according to instruction on the screen or in
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)

Perform each diagnostic mode according to each service proce-
dure.
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-
related 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 infor-
mation such as Vehicle Identification Number (VIN) and Calibration IDs.

Diagnostic test mode

Function

BBIA0538E

SEF398S

SEF416S

2009 Pathfinder

EC-84

< COMPONENT DIAGNOSIS >

[VQ40DE]

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

COMPONENT DIAGNOSIS

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Description

INFOID:0000000004297263

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 “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:0000000004297264

• 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

• Transmission: Warmed-up*

• Electrical load: Not applied*

• Engine speed: Idle
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE” (A/T
fluid temperature sensor signal) indicates more than 60

C (140

F).

*2: Rear window defogger switch, air conditioner switch lighting switch are OFF. Steering wheel is straight
ahead.

Inspection Procedure

INFOID:0000000004297265

NOTE:
Perform “SPEC” of “DATA MONITOR” mode in maximum scale display.

Perform

EC-20, "Basic Inspection"

Confirm that the testing conditions indicated above are met.

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.

Make sure that monitor items are within the SP value.

If NG, go to