Nissan Pathfinder (2009 year). Manual - part 307

EC-470

< ECU DIAGNOSIS >

[VQ40DE]

ECM

FUEL 
SYSTEM

81H

Fuel injection system function 
(Bank 1)

P0171 or P0172

80H

2FH

Long term fuel trim

P0171 or P0172

81H

24H

The number of lambda control 
clamped

82H

Fuel injection system function 
(Bank 2)

P0174 or P0175

80H

2FH

Long term fuel trim

P0174 or P0175

81H

24H

The number of lambda control 
clamped

MISFIRE

A1H

Multiple Cylinder Misfire

P0301

80H

24H

Misfiring counter at 1000 revolu-
tion of the first cylinder

P0302

81H

24H

Misfiring counter at 1000 revolu-
tion of the second cylinder

P0303

82H

24H

Misfiring counter at 1000 revolu-
tion of the third cylinder

P0304

83H

24H

Misfiring counter at 1000 revolu-
tion of the fourth cylinder

P0305

84H

24H

Misfiring counter at 1000 revolu-
tion of the fifth cylinder

P0306

85H

24H

Misfiring counter at 1000 revolu-
tion of the sixth cylinder

P0307

86H

24H

Misfiring counter at 1000 revolu-
tion of the seventh cylinder

P0308

87H

24H

Misfiring counter at 1000 revolu-
tion of the eighth cylinder

P0300

88H

24H

Misfiring counter at 1000 revolu-
tion of the multiple cylinders

P0301

89H

24H

Misfiring counter at 200 revolution 
of the first cylinder

P0302

8AH

24H

Misfiring counter at 200 revolution 
of the second cylinder

P0303

8BH

24H

Misfiring counter at 200 revolution 
of the third cylinder

P0304

8CH

24H

Misfiring counter at 200 revolution 
of the fourth cylinder

P0305

8DH

24H

Misfiring counter at 200 revolution 
of the fifth cylinder

P0306

8EH

24H

Misfiring counter at 200 revolution 
of the sixth cylinder

P0307

8FH

24H

Misfiring counter at 200 revolution 
of the seventh cylinder

P0308

90H

24H

Misfiring counter at 200 revolution 
of the eightth cylinder

P0300

91H

24H

Misfiring counter at 1000 revolu-
tion of the single cylinder

P0300

92H

24H

Misfiring counter at 200 revolution 
of the single cylinder

P0300

93H

24H

Misfiring counter at 200 revolution 
of the multiple cylinders

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID

2009 Pathfinder

ECM

EC-471

< ECU DIAGNOSIS >

[VQ40DE]

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HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION

How to Erase DTC

 With CONSULT-III

The emission related diagnostic information in the ECM can be erased by selecting “ALL Erase” in the
“Description” of “FINAL CHECK” mode with CONSULT-III.

 With GST

The emission related diagnostic information in the ECM can be erased by selecting Service $04 with GST.
1.

If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.

2.

Perform 

TM-34, "OBD-II Diagnostic Trouble Code (DTC)"

. (The DTC in TCM will be erased.)

MISFIRE

A2H

No.1 Cylinder Misfire

P0301

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0301

0CH

24H

Misfire counts for last/current driv-
ing cycles

A3H

No.2 Cylinder Misfire

P0302

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0302

0CH

24H

Misfire counts for last/current driv-
ing cycles

A4H

No.3 Cylinder Misfire

P0303

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0303

0CH

24H

Misfire counts for last/current driv-
ing cycles

A5H

No.4 Cylinder Misfire

P0304

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0304

0CH

24H

Misfire counts for last/current driv-
ing cycles

A6H

No.5 Cylinder Misfire

P0305

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0305

0CH

24H

Misfire counts for last/current driv-
ing cycles

A7H

No.6 Cylinder Misfire

P0306

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0306

0CH

24H

Misfire counts for last/current driv-
ing cycles

A8H

No.7 Cylinder Misfire

P0307

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0307

0CH

24H

Misfire counts for last/current driv-
ing cycles

A9H

No.8 Cylinder Misfire

P0308

0BH

24H

EWMA (Exponential Weighted 
Moving Average) misfire counts 
for last 10 driving cycles

P0308

0CH

24H

Misfire counts for last/current driv-
ing cycles

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID

2009 Pathfinder

EC-472

< ECU DIAGNOSIS >

[VQ40DE]

ECM

3.

Select Service $04 with GST (Generic Scan Tool).

 No Tools

1.

If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once.
Wait at least 10 seconds and then turn it ON (engine stopped) again.

2.

Perform 

TM-34, "OBD-II Diagnostic Trouble Code (DTC)"

. (The DTC in TCM will be erased.)

3.

Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to

EC-65, "Malfunction Indicator Lamp (MIL)"

.

• If the battery is disconnected, the emission-related diagnostic information will be lost within 24

hours.

• The following data are 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
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.

2009 Pathfinder

ENGINE CONTROL SYSTEM SYMPTOMS

EC-473

< SYMPTOM DIAGNOSIS >

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SYMPTOM DIAGNOSIS

ENGINE CONTROL SYSTEM SYMPTOMS

Symptom Matrix Chart

INFOID:0000000004297664

SYSTEM — BASIC ENGINE CONTROL SYSTEM

SYMPTOM

Reference 
page

HARD/NO ST

AR

T

/REST

AR

T

 (EXCP

. 

H

A

)

ENGINE ST

ALL

HESIT

A

TION/SURGING/FLA

T

 SPOT

SP

ARK KNOCK/DET

O

NA

TION

LACK

 OF POWER/

POOR 

ACC

E

LERA

TION

HIGH IDL

E

/LOW

 IDLE

ROUG

H IDLE/HUNTING

IDLI

NG VIBRA

T

ION

SLOW/NO RETURN T

O

 IDLE

OVERHEA

T

S/W

A

TER TEMPERA

T

UR

E

 HIGH

EXCESS

IVE F

U

E

L

 CONSUMP

T

IO

N

EXCESS

IVE OIL CONSUMP

T

ION

BA

TTER

Y

 DEAD (UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

Fuel

Fuel  pump  circuit

1

1

2

3

2

2

2

3

2

EC-398

Fuel  pressure  regulator  system

3

3

4

4

4

4

4

4

4

4

EC-484

Fuel  injector  circuit

1

1

2

3

2

2

2

2

EC-394

Evaporative  emission  system

3

3

4

4

4

4

4

4

4

4

EC-45

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-412

Incorrect idle speed adjustment

1

1

1

1

1

EC-20

Electric  throttle  control  actuator

1

1

2

3

3

2

2

2

2

2

2

EC-357

, 

EC-363

Ignition

Incorrect  ignition  timing  adjustment

3

3

1

1

1

1

1

1

EC-20

Ignition  circuit

1

1

2

2

2

2

2

2

EC-402

Power  supply  and  ground  circuit

2

2

3

3

3

3

3

2

3

EC-92

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-111

, 

EC-122

Engine coolant temperature sensor circuit

3

3

3

EC-128

, 

EC-136

Air fuel ratio (A/F) sensor 1

EC-144
EC-148
EC-152
EC-156
EC-380

Throttle position sensor circuit

2

2

EC-132

, 

EC-199

, 

EC-314

, 

EC-316

, 

EC-372

Accelerator pedal position sensor circuit

3

2

1

EC-92

, 

EC-

365

, 

EC-

368

, 

EC-

376

2009 Pathfinder

EC-474

< SYMPTOM DIAGNOSIS >

[VQ40DE]

ENGINE CONTROL SYSTEM SYMPTOMS

1 - 6: The numbers refer to the order of inspection.

(continued on next page)

SYSTEM — ENGINE MECHANICAL & OTHER

Knock sensor circuit

2

3

EC-210

Crankshaft position sensor (POS) circuit

2

2

EC-213

Camshaft position sensor (PHASE) circuit

3

2

EC-217

Vehicle speed signal circuit

2

3

3

3

EC-288

Power steering pressure sensor circuit

2

3

3

EC-294

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-297

, 

EC-299

Intake valve timing control solenoid valve cir-
cuit

3

2

1

3

2

2

3

3

EC-108

PNP switch circuit

3

3

3

3

3

EC-305

VIAS control solenoid valve circuit

1

EC-348

Refrigerant pressure sensor circuit

2

3

3

4

EC-414

Electrical load signal circuit

3

EC-392

Air  conditioner  circuit

2

2

3

3

3

3

3

3

3

3

2

HAC-108

, 

HAC-174

ABS actuator and electric unit (control unit)

4

BRC-8

, 

BRC-137

SYMPTOM

Reference 
page

HARD/NO S

T

A

R

T/RES

T

A

R

T (E

XCP

. HA)

E

N

GINE

 ST

ALL

HES

IT

A

TION/SURGING/FLA

T

 SPOT

S

P

ARK KNOC

K

/DET

O

NA

TI

ON

LACK OF 

POWER/POOR ACCELERA

TION

HIG

H

 IDL

E

/L

OW

 ID

LE

ROUGH IDLE/HUNTING

ID

LING VI

BRA

T

ION

S

L

OW/NO RETU

RN 

T

O

 ID

LE

OVERHEA

T

S

/W

A

TER TEMPERA

T

URE HIG

H

E

X

CESSIVE

 FUEL CON

S

UMP

T

ION

E

X

CESSIVE

 OIL 

C

O

NSUMP

T

ION

B

A

TTER

Y 

DEAD (UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

2009 Pathfinder

ENGINE CONTROL SYSTEM SYMPTOMS

EC-475

< SYMPTOM DIAGNOSIS >

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SYMPTOM

Reference 
page

HARD/NO ST

AR

T/REST

AR

T (EXCP

. 

HA)

E

N

GI

N

E

 ST

AL

L

HESIT

A

TION/S

U

R

GING/F

LA

T SP

OT

SP

ARK KNOCK/DE

T

O

NA

TION

LACK OF POWE

R/POOR

 ACCELERA

TIO

N

HIGH IDL

E

/L

OW

 IDL

E

ROUG

H IDLE/HU

N

TING

IDL

ING VIBRA

T

ION

SLO

W

/NO RETURN T

O

 IDLE

OVERHEA

T

S/W

A

TE

R

 TEMPERA

T

URE 

HIGH

EXCES

SIVE F

U

EL CONSUMP

T

ION

EXCES

SIVE OI

L CONSUMP

T

IO

N

BA

TTE

R

Y

 DEAD (UN

D

E

R

 CH

A

R

GE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

Fuel

Fuel tank

5

5

FL-6

Fuel piping

5

5

5

5

5

5

FL-5

Vapor lock

—

Valve deposit

5

5

5

5

5

5

5

—

Poor fuel (Heavy weight gasoline, 
Low octane)

—

Air

Air duct

5

5

5

5

5

5

EM-25

Air cleaner

EM-25

Air leakage from air duct
(Mass air flow sensor — electric 
throttle control actuator)

5

5

5

5

EM-25

Electric throttle control actuator

EM-26

Air leakage from intake manifold/
Collector/Gasket

EM-26

, 

EM-29

Cranking

Battery

1

1

1

1

1

1

1

1

PG-7

Generator circuit

CHG-5

Starter circuit

3

STR-5

Signal plate

6

EM-118

PNP switch

4

TM-51

Engine

Cylinder head

5

5

5

5

5

5

5

5

EM-98

Cylinder head gasket

4

3

Cylinder block

6

6

6

6

6

6

6

6

4

EM-118

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve 
mecha-
nism

Timing chain

5

5

5

5

5

5

5

5

EM-61

Camshaft

EM-81

Intake valve timing control

EM-61

Intake valve

3

EM-92

Exhaust valve

2009 Pathfinder

EC-476

< SYMPTOM DIAGNOSIS >

[VQ40DE]

ENGINE CONTROL SYSTEM SYMPTOMS

1 - 6: The numbers refer to the order of inspection.

Exhaust

Exhaust manifold/Tube/Muffler/
Gasket

5

5

5

5

5

5

5

5

EM-31

, 

Three way catalyst

Lubrica-
tion

Oil pan/Oil strainer/Oil pump/Oil 
filter/Oil gallery/Oil cooler

5

5

5

5

5

5

5

5

EM-35

, 

LU-

12

, 

LU-14

Oil level (Low)/Filthy oil

Cooling

Radiator/Hose/Radiator filler cap

5

5

5

5

5

5

5

4

5

LU-8

Thermostat

5

CO-11

Water pump

CO-27

Water gallery

CO-29

Cooling fan

5

CO-19

   or

CO-20

Coolant level (Low)/Contaminat-
ed coolant

5

CO-11

NVIS (NISSAN Vehicle Immobilizer System — 
NATS)

1

1

SEC-5

 or 

SEC-121

SYMPTOM

Reference 
page

HARD/NO S

T

A

R

T/RES

T

A

R

T (E

XCP

. HA)

E

N

GINE

 ST

ALL

HES

IT

A

TION/SURGING/FLA

T

 SPOT

S

P

ARK KNOC

K

/DET

O

NA

TI

ON

LACK OF 

POWER/POOR ACCELERA

TION

HIG

H

 IDL

E

/L

OW

 ID

LE

ROUGH IDLE/HUNTING

ID

LING VI

BRA

T

ION

S

L

OW/NO RETU

RN 

T

O

 ID

LE

OVERHEA

T

S

/W

A

TER TEMPERA

T

URE HIG

H

E

X

CESSIVE

 FUEL CON

S

UMP

T

ION

E

X

CESSIVE

 OIL 

C

O

NSUMP

T

ION

B

A

TTER

Y 

DEAD (UNDER CHARGE)

Warranty symptom code

AA

AB

AC

AD

AE

AF

AG

AH

AJ

AK

AL

AM

HA

2009 Pathfinder

NORMAL OPERATING CONDITION

EC-477

< SYMPTOM DIAGNOSIS >

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NORMAL OPERATING CONDITION

Fuel Cut Control (at No Load and High Engine Speed)

INFOID:0000000004297665

INPUT/OUTPUT SIGNAL CHART

*: This signal is sent to the ECM through CAN communication line.

SYSTEM DESCRIPTION

If the engine speed is above 1,800 rpm under no load (for example, the shift position is neutral and engine
speed is over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies
based on engine speed.
Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.
NOTE:
This function is different from deceleration control listed under 

EC-36, "System Description"

.

Sensor

Input Signal to ECM

ECM function

Actuator

Park/neutral position (PNP) switch

Neutral position

Fuel cut control

Fuel injector

Accelerator pedal position sensor

Accelerator pedal position

Engine coolant temperature sensor

Engine coolant temperature

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed

Wheel sensor

Vehicle speed*

2009 Pathfinder