Nissan Pathfinder (2010 year). Manual - part 308

EC-556

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY DETE-
RIORATION>”, “FUEL INJECTION SYSTEM”

*1: When the same malfunction is de-

tected in two consecutive trips, MIL 
will illuminate.

*2: MIL will turn off after vehicle is driven 

3 times (pattern B) without any mal-
functions.

*3: When the same malfunction is de-

tected in two consecutive trips, the 
DTC and the freeze frame data will be 
stored in ECM.

*4: The DTC and the freeze frame data 

will not be displayed any longer after 
vehicle is driven 40 times (pattern A) 
without the same malfunction.
(The DTC and the freeze frame data 
still remain in ECM.)

*5: When a malfunction is detected for 

the first time, the 1st trip DTC and the 
1st trip freeze frame data will be 
stored in ECM.

*6: 1st trip DTC will be cleared after vehi-

cle is driven once (pattern B) without 
the same malfunction.

*7: When the same malfunction is de-

tected in the 2nd trip, the 1st trip 
freeze frame data will be cleared.

JMBIA1418GB

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-557

< FUNCTION DIAGNOSIS >

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<Driving Pattern A>

• The A counter will be cleared when the malfunction is detected regardless of (1) - (4).

• The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.

• The DTC will not be displayed after the A counter reaches 40.

<Driving Pattern B>

Driving pattern B means operating vehicle as per the following:

All components and systems should be monitored at least once by the OBD system.

• The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.

• The B counter will be counted up when driving pattern B is satisfied without any malfunctions.

• The MIL will turn off when the B counter reaches 3 (*2 in OBD SYSTEM OPERATION CHART).

CONSULT-III Function (ENGINE)

INFOID:0000000005257514

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.
• Diagnostic trouble codes
• 1st trip diagnostic trouble codes
• Freeze frame data
• 1st trip freeze frame data
• System readiness test (SRT) codes
• Test  values

WORK SUPPORT MODE

Work Item

AEC574

Diagnostic test mode

Function

Work Support

This mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on the CONSULT-III unit.

Self Diagnostic Result

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data 
can be read and erased quickly.*

Data Monitor

Input/Output data in the ECM can be read.

Active Test

Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECMs and also shifts 
some parameters in a specified range.

Function Test

This mode is used to inform customers when the vehicle requires periodic maintenance.

DTC & SRT Confirmation

The status of system monitoring tests and the self-diagnosis status/results can be confirmed.

ECU Identification

ECM part number can be read.

2010 Pathfinder

EC-558

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

*1: This function is not necessary in the usual service procedure.

SELF-DIAG RESULTS MODE

Self Diagnostic Item

Regarding items of DTC and 1st trip DTC, refer to 

EC-928, "DTC Index"

.

Freeze Frame Data and 1st Trip Freeze Frame Data

WORK ITEM

CONDITION

USAGE

FUEL PRESSURE RELEASE

• FUEL PUMP WILL STOP BY TOUCHING “START” DUR-

ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.

When releasing fuel pressure from 
fuel line

IDLE AIR VOL LEARN

• THE IDLE AIR VOLUME THAT KEEPS THE ENGINE 

WITHIN THE SPECIFIED RANGE IS MEMORIZED IN 
ECM.

When learning the idle air volume

SELF-LEARNING CONT

• THE COEFFICIENT OF SELF-LEARNING CONTROL 

MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.

When clearing the coefficient of 
self-learning control value

EVAP SYSTEM CLOSE

CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN 
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE 
FOLLOWING CONDITIONS.
• IGN SW ON
• ENGINE NOT RUNNING
• AMBIENT TEMPERATURE IS ABOVE 0

°

C (32

°

F).

• NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-

TEM

• FUEL TANK TEMP. IS MORE THAN 0

°

C (32

°

F).

• WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-

TEM CLOSE”

• WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE” 

UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
III WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.

NOTE:
WHEN STARTING ENGINE, CONSULT-III MAY DIS-
PLAY “BATTERY VOLTAGE IS LOW. CHARGE BAT-
TERY”, EVEN IN USING CHARGED BATTERY.

When detecting EVAP vapor leak 
of EVAP system

VIN REGISTRATION

• IN THIS MODE, VIN IS REGISTERED IN ECM

When registering VIN in ECM

TARGET IDLE RPM ADJ*

1

• IDLE CONDITION

When setting target idle speed

TARGET IGN TIM ADJ*

1

• IDLE CONDITION

When adjusting target ignition tim-
ing

Freeze frame data item*

Description

DIAG TROUBLE CODE
[PXXXX]

• The engine control component part/control system has a trouble code, that is displayed as PXXXX.

(Refer to 

EC-928, "DTC Index"

.)

FUEL SYS-B1

• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One of the following mode is displayed.

Mode2: Open loop due to detected system malfunction
Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: Open loop - has not yet satisfied condition to go to closed loop

FUEL SYS-B2

CAL/LD VALUE [%]

• The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP
[

°

C] or [

°

F]

• The engine coolant temperature at the moment a malfunction is detected is displayed.

L-FUEL TRM-B1 [%]

• “Long-term fuel trim” at the moment a malfunction is detected is displayed.
• The “long-term fuel trim” indicates much more gradual feedback compensation to the base fuel schedule 

than “short-term fuel trim”.

L-FUEL TRM-B2 [%]

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-559

< FUNCTION DIAGNOSIS >

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*: The item is the same as that of 1st trip freeze frame data.

DATA MONITOR MODE

Monitored Item

×

: Applicable

S-FUEL TRM-B1 [%]

• “Short-term fuel trim” at the moment a malfunction is detected is displayed.
• The “short-term fuel trim” indicates dynamic or instantaneous feedback compensation to the base fuel 

schedule.

S-FUEL TRM-B2 [%]

ENGINE SPEED [rpm]

• The engine speed at the moment a malfunction is detected is displayed.

VEHICL SPEED
[km/h] or [mph]

• The vehicle speed at the moment a malfunction is detected is displayed.

ABSOL TH-P/S [%]

• The throttle valve opening at the moment a malfunction is detected is displayed.

B/FUEL SCHDL [msec]

• The base fuel schedule at the moment a malfunction is detected is displayed.

INT/A TEMP SE
[

°

C] or [

°

F]

• The intake air temperature at the moment a malfunction is detected is displayed.

INT MANI PRES [kPa] 

• These items are displayed but are not applicable to this models.

COMBUST CONDITION

Freeze frame data item*

Description

Monitored item

Unit

Description

Remarks

ENG SPEED

rpm

• Indicates the engine speed computed from the 

signal of the crankshaft position sensor (POS) 
and camshaft position sensor (PHASE).

• Accuracy becomes poor if engine speed 

drops below the idle rpm.

• If the signal is interrupted while the engine 

is running, an abnormal value may be indi-
cated.

MAS A/F SE-B1

V

• The signal voltage of the mass air flow sensor is 

displayed.

• When the engine is stopped, a certain value 

is indicated.

• When engine is running, specification range 

is indicated in “SPEC”.

B/FUEL SCHDL

ms

• Base fuel schedule indicates the fuel injection 

pulse width programmed into ECM, prior to any 
learned on board correction.

• When engine is running, specification range 

is indicated in “SPEC”.

A/F ALPHA-B1

%

• The mean value of the air-fuel ratio feedback cor-

rection factor per cycle is indicated.

• When the engine is stopped, a certain value 

is indicated.

• When engine is running, specification range 

is indicated in “SPEC”.

• This data also includes the data for the air-

fuel ratio learning control.

A/F ALPHA-B2

%

COOLAN TEMP/S

°

C or 

°

F

• The engine coolant temperature (determined by 

the signal voltage of the engine coolant tempera-
ture sensor) is displayed.

• When the engine coolant temperature sen-

sor is open or short-circuited, ECM enters 
fail-safe mode. The engine coolant temper-
ature determined by the ECM is displayed.

A/F SEN1 (B1)

V

• The A/F signal computed from the input signal of 

the A/F sensor 1 is displayed.

A/F SEN1 (B2)

V

HO2S2 (B1)

V

• The signal voltage of the heated oxygen sensor 2 

is displayed.

HO2S2 (B2)

V

HO2S2 MNTR(B1)

RICH/

LEAN

• Display of heated oxygen sensor 2 signal:

RICH: means the amount of oxygen after three 
way catalyst is relatively small.
LEAN: means the amount of oxygen after three 
way catalyst is relatively large.

• When the engine is stopped, a certain value 

is indicated.

HO2S2 MNTR(B2)

RICH/

LEAN

VHCL SPEED SE

km/h or 

mph

• The vehicle speed computed from the vehicle 

speed signal sent from unified meter control unit 
is displayed.

BATTERY VOLT

V

• The power supply voltage of ECM is displayed.

2010 Pathfinder

EC-560

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

ACCEL SEN 1

V

• The accelerator pedal position sensor signal volt-

age is displayed.

• ACCEL SEN 2 signal is converted by ECM 

internally. Thus, it differs from ECM terminal 
voltage signal.

ACCEL SEN 2

V

TP SEN 1-B1

V

• The throttle position sensor signal voltage is dis-

played.

• TP SEN 2-B1 signal is converted by ECM 

internally. Thus, it differs from ECM terminal 
voltage signal.

TP SEN 2-B1

V

FUEL T/TMP SE

°

C or 

°

F

• The fuel temperature (determined by the signal 

voltage of the fuel tank temperature sensor) is 
displayed.

INT/A TEMP SE

°

C or 

°

F

• The intake air temperature (determined by the 

signal voltage of the intake air temperature sen-
sor) is indicated.

EVAP SYS PRES

V

• The signal voltage of EVAP control system pres-

sure sensor is displayed.

FUEL LEVEL SE

V

• The signal voltage of the fuel level sensor is dis-

played.

START SIGNAL

ON/OFF

• Indicates start signal status [ON/OFF] computed 

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

• After starting the engine, [OFF] is displayed 

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 condition-

er switch as determined by the air conditioner sig-
nal.

P/N POSI SW

ON/OFF

• Indicates [ON/OFF] condition from the park/neu-

tral position (PNP) 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: Lighting switch is in 2nd position.
OFF: Lighting switch is OFF.

IGNITION SW

ON/OFF

• Indicates [ON/OFF] condition from ignition switch 

signal.

HEATER FAN SW

ON/OFF

• Indicates [ON/OFF] condition from 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 

compensated by ECM according to the input sig-
nals.

• When the engine is stopped, a certain com-

puted value is indicated.

INJ PULSE-B2

msec

IGN TIMING

BTDC

• Indicates the ignition timing computed by ECM 

according 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

gm/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 ECM 
according to the input signals.

• The opening becomes larger as the value in-

creases.

Monitored item

Unit

Description

Remarks

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-561

< FUNCTION DIAGNOSIS >

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INT/V TIM(B1)

°

CA

• Indicates [

°

CA] of intake camshaft advanced an-

gle. 

INT/V TIM(B2)

°

CA

INT/V SOL(B1)

%

• The control value of the intake valve timing con-

trol solenoid valve (determined by ECM accord-
ing to the input signals) is indicated.

• The advance angle becomes larger as the value 

increases.

INT/V SOL(B2)

%

AIR COND RLY

ON/OFF

• The air conditioner relay control condition (deter-

mined by ECM according to the input signals) is 
indicated.

FUEL PUMP RLY

ON/OFF

• Indicates the fuel pump relay control condition 

determined by ECM according to the input sig-
nals.

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 ECM according to the in-
put signals.

COOLING FAN

HI/LOW/

OFF

• The control condition of the cooling fan (deter-

mined by ECM according to the input signals) is 
indicated.
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 

turbine revolution sensor signal.

VEHICLE SPEED

km/h or 

mph

• Indicates the vehicle speed computed from the 

revolution sensor signal.

IDL A/V LEARN

YET/CM-

PLT

• 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)

%

• 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

V

• 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 unified meter control unit 
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.

Monitored item

Unit

Description

Remarks

2010 Pathfinder

EC-562

< FUNCTION DIAGNOSIS >

[VK56DE]

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

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.

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 operation 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 operation is cut off.

AT OD MONITOR

ON/OFF

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

ing to the input signal from TCM.

AT OD CANCEL

ON/OFF

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

signal sent from TCM.

CRUISE LAMP

ON/OFF

• Indicates [ON/OFF] condition of CRUISE lamp 

determined by ECM according to the input sig-
nals.

SET LAMP

ON/OFF

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

mined by 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

mV

• The signal voltage of battery current sensor is 

displayed.

ALT DUTY SIG

ON/OFF

• The control condition of the power generation 

voltage variable control (determined by ECM ac-
cording 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 stored in ECM. The 

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

A/F ADJ-B2

—

Monitored item

Unit

Description

Remarks

2010 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-563

< FUNCTION DIAGNOSIS >

[VK56DE]

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*: 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 “SYSTEM READINESS TEST (SRT) CODE” in 

EC-536, "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

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

• Engine: Return to the original 

trouble condition

• Change the amount of fuel injec-

tion using CONSULT-III.

If trouble symptom disappears, see 
CHECK ITEM.

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

IGNITION TIM-
ING

• Engine: Return to the original 

trouble condition

• Timing light: Set
• Retard the ignition timing using 

CONSULT-III.

If trouble symptom disappears, see 
CHECK ITEM.

• Perform Idle Air Volume Learning.

POWER BAL-
ANCE

• Engine: After warming up, idle the 

engine.

• A/C switch: OFF
• Selector lever: P or N
• Cut off each injector signal one at 

a time using CONSULT-III.

Engine runs rough or dies.

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

COOLING FAN*

• Ignition switch: ON
• Turn the cooling fan HI 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 

trouble condition

• Change the engine coolant tem-

perature using CONSULT-III.

If trouble symptom disappears, 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

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 

trouble condition

• Change intake valve timing using 

CONSULT-III.

If trouble symptom disappears, 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

2010 Pathfinder