Nissan Pathfinder (2009 year). Manual - part 365

EC-934

< ECU DIAGNOSIS >

[VK56DE]

ECM

HO2S

05H

Air fuel ratio (A/F) sensor 1 
(Bank 2)

P0151

83H

0BH

Minimum sensor output voltage for test 
cycle

P0151

84H

0BH

Maximum sensor output voltage for test 
cycle

P0150

85H

0BH

Minimum sensor output voltage for test 
cycle

P0150

86H

0BH

Maximum sensor output voltage for test 
cycle

P0153

87H

04H

Response rate: Response ratio (Lean to 
Rich)

P0153

88H

04H

Response rate: Response ratio (Rich to 
Lean)

P2A03

89H

84H

The amount of shift in air fuel ratio

P2A03

8AH

84H

The amount of shift in air fuel ratio

P0150

8BH

0BH

Difference in sensor output voltage

P0153

8CH

83H

Response gain at the limited frequency

06H

Heated oxygen sensor 2
(Bank 2)

P0158

07H

0CH

Minimum sensor output voltage for test 
cycle

P0157

08H

0CH

Maximum sensor output voltage for test 
cycle

P0158

80H

0CH

Sensor output voltage

P0159

81H

0CH

Difference in sensor output voltage

07H

Heated oxygen sensor 3 
(Bank2)

P0163

07H

0CH

Minimum sensor output voltage for test 
cycle

P0164

08H

0CH

Maximum sensor output voltage for test 
cycle

P0166

80H

0CH

Sensor output voltage

P0165

81H

0CH

Difference in sensor output voltage

CATA-
LYST

21H

Three way catalyst function 
(Bank1)

P0420

80H

01H

O2 storage index

P0420

82H

01H

Switching time lag engine exhaust index 
value

P2423

83H

0CH

Difference in 3rd O2 sensor output volt-
age

P2423

84H

84H

O2 storage index in HC trap catalyst

22H

Three way catalyst function 
(Bank2)

P0430

80H

01H

O2 storage index

P0430

82H

01H

Switching time lag engine exhaust index 
value

P2424

83H

0CH

Difference in 3rd O2 sensor output volt-
age

P2424

84H

84H

O2 storage index in HC trap catalyst

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-935

< ECU DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

EGR 
SYSTEM

31H

EGR function

P0400

80H

96H

Low Flow Faults: EGR temp change 
rate (short term)

P0400

81H

96H

Low Flow Faults: EGR temp change 
rate (long term)

P0400

82H

96H

Low Flow Faults: Difference between 
max EGR temp and EGR temp under 
idling condition

P0400

83H

96H

Low Flow Faults: Max EGR temp

P1402

84H

96H

High Flow Faults: EGR temp increase 
rate

VVT 
SYSTEM

35H

VVT Monitor (Bank1)

P0011

80H

9DH

VTC intake function diagnosis (VTC 
alignment check diagnosis)

P0014

81H

9DH

VTC exhaust function diagnosis (VTC 
alignment check diagnosis)

P0011

82H

9DH

VTC intake function diagnosis (VTC 
drive failure diagnosis)

P0014

83H

9DH

VTC exhaust function diagnosis (VTC 
drive failure diagnosis)

36H

VVT Monitor (Bank2)

P0021

80H

9DH

VTC intake function diagnosis (VTC 
alignment check diagnosis)

P0024

81H

9DH

VTC exhaust function diagnosis (VTC 
alignment check diagnosis)

P0021

82H

9DH

VTC intake function diagnosis (VTC 
drive failure diagnosis)

P0024

83H

9DH

VTC exhaust function diagnosis (VTC 
drive failure diagnosis)

EVAP 
SYSTEM

39H

EVAP control system leak 
(Cap Off)

P0455

80H

0CH

Difference in pressure sensor output 
voltage before and after pull down

3BH

EVAP control system leak 
(Small leak)

P0442

80H

05H

Leak area index (for more than 0.04 
inch)

3CH

EVAP control system leak
 (Very small leak)

P0456

80H

05H

Leak area index (for more than 0.02 
inch)

P0456

81H

FDH

Maximum internal pressure of EVAP 
system during monitoring

3DH

Purge flow system

P0441

83H

0CH

Difference in pressure sensor output 
voltage before and after vent control 
valve close

O2 SEN-
SOR 
HEATER

41H

A/F sensor 1 heater
 (Bank 1)

Low Input:P0031

High Input:P0032

81H

0BH

Converted value of Heater electric cur-
rent to voltage

42H

Heated oxygen sensor 2 heat-
er (Bank 1)

Low Input:P0037

High Input:P0038

80H

0CH

Converted value of Heater electric cur-
rent to voltage

43H

Heated oxygen sensor 3 heat-
er (Bank 1)

P0043

80H

0CH

Converted value of Heater electric cur-
rent to voltage

45H

A/F sensor 1 heater
 (Bank 2)

Low Input:P0051

High Input:P0052

81H

0BH

Converted value of Heater electric cur-
rent to voltage

46H

Heated oxygen sensor 2 heat-
er (Bank 2)

Low Input:P0057

High Input:P0058

80H

0CH

Converted value of Heater electric cur-
rent to voltage

47H

Heated oxygen sensor 3 heat-
er (Bank 2)

P0063

80H

0CH

Converted value of Heater electric cur-
rent to voltage

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID

2009 Pathfinder

EC-936

< ECU DIAGNOSIS >

[VK56DE]

ECM

 SEC-
OND-
ARY AIR

71H

Secondary Air system

P0411

80H

01H

Secondary Air Injection System Incor-
rect Flow Detected

Bank1: P0491
Bank2: P0492

81H

01H

Secondary Air Injection System Insuffi-
cient Flow

P2445

82H

01H

Secondary Air Injection System Pump 
Stuck Off

P2448

83H

01H

Secondary Air Injection System High 
Airflow

Bank1: P2440
Bank2: P2442

84H

01H

Secondary Air Injection System Switch-
ing Valve Stuck Open

P2440

85H

01H

Secondary Air Injection System Switch-
ing Valve Stuck Open

P2444

86H

01H

Secondary Air Injection System Pump 
Stuck On

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

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-937

< ECU DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

MISFIRE

A1H

Multiple Cylinder Misfires

P0301

80H

24H

Misfiring counter at 1000 revolution of 
the first cylinder

P0302

81H

24H

Misfiring counter at 1000 revolution of 
the second cylinder

P0303

82H

24H

Misfiring counter at 1000 revolution of 
the third cylinder

P0304

83H

24H

Misfiring counter at 1000 revolution of 
the fourth cylinder

P0305

84H

24H

Misfiring counter at 1000 revolution of 
the fifth cylinder

P0306

85H

24H

Misfiring counter at 1000 revolution of 
the sixth cylinder

P0307

86H

24H

Misfiring counter at 1000 revolution of 
the seventh cylinder

P0308

87H

24H

Misfiring counter at 1000 revolution of 
the eighth cylinder

P0300

88H

24H

Misfiring counter at 1000 revolution 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 
eighth cylinder

P0300

91H

24H

Misfiring counter at 1000 revolution 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

EC-938

< ECU DIAGNOSIS >

[VK56DE]

ECM

HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION

How to Erase DTC

 WITH CONSULT-III

NOTE:
• 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.

• If the DTC is not for A/T related items (see 

EC-921, "DTC Index"

), skip step 1.

1.

Perform “HOW TO ERASE DTC” in 

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

. (The DTC in TCM

will be erased)

2.

Select “ENGINE” with CONSUILT-III.

MISFIRE

A2H

No.1 Cylinder Misfire

P0301

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0301

0CH

24H

Misfire counts for last/current driving cy-
cles

A3H

No.2 Cylinder Misfire

P0302

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0302

0CH

24H

Misfire counts for last/current driving cy-
cles

A4H

No.3 Cylinder Misfire

P0303

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0303

0CH

24H

Misfire counts for last/current driving cy-
cles

A5H

No.4 Cylinder Misfire

P0304

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0304

0CH

24H

Misfire counts for last/current driving cy-
cles

A6H

No.5 Cylinder Misfire

P0305

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0305

0CH

24H

Misfire counts for last/current driving cy-
cles

A7H

No.6 Cylinder Misfire

P0306

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0306

0CH

24H

Misfire counts for last/current driving cy-
cles

A8H

No.7 Cylinder Misfire

P0307

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0307

0CH

24H

Misfire counts for last/current driving cy-
cles

A9H

No.8 Cylinder Misfire

P0308

0BH

24H

EWMA (Exponential Weighted Moving 
Average) misfire counts for last 10 driv-
ing cycles

P0308

0CH

24H

Misfire counts for last/current driving cy-
cles

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-939

< ECU DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

Select “SELF DIAGNOSTIC RESULT”.

4.

Touch “ERASE”. (DTC in ECM will be erased.)

 WITH GST

NOTE:
• 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.

1.

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

 No Tools

NOTE:
• 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.

1.

Erase DTC in ECM. Refer to “How to Erase Diagnostic Test Mode II (Self-Diagnostic Results)” in 

EC-538,

"Malfunction Indicator Lamp (MIL)"

.

• If the battery is disconnected, the emission-related diagnostic information will be cleared 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

EC-940

< SYMPTOM DIAGNOSIS >

[VK56DE]

ENGINE CONTROL SYSTEM SYMPTOMS

SYMPTOM DIAGNOSIS

ENGINE CONTROL SYSTEM SYMPTOMS

Symptom Matrix Chart

INFOID:0000000003936875

SYSTEM — BASIC ENGINE CONTROL SYSTEM

SYMPTOM

Refer-
ence 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-869

Fuel  pressure  regulator  system

3

3

4

4

4

4

4

4

4

4

EC-951

Fuel  injector  circuit

1

1

2

3

2

2

2

2

EC-866

Evaporative  emission  system

3

3

4

4

4

4

4

4

4

4

EC-520

Air

Positive crankcase ventilation sys-
tem

3

3

4

4

4

4

4

4

4

4

1

EC-882

Incorrect idle speed adjustment

1

1

1

1

1

EC-495

Electric  throttle  control  actuator

1

1

2

3

3

2

2

2

2

2

2

EC-826
EC-829
EC-833
EC-835

Ignition

Incorrect  ignition  timing  adjustment

3

3

1

1

1

1

1

1

EC-495

Ignition  circuit

1

1

2

2

2

2

2

2

EC-872

Main  power  supply  and  ground  circuit

2

2

3

3

3

3

3

2

3

EC-565

2009 Pathfinder

ENGINE CONTROL SYSTEM SYMPTOMS

EC-941

< SYMPTOM DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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

(continued on next table)

SYSTEM — ENGINE MECHANICAL & OTHER

Mass air flow sensor circuit

1

1

2

2

2

2

2

2

EC-588
EC-594

Engine coolant temperature sensor circuit

3

3

3

EC-602
EC-606

Air fuel ratio (A/F) sensor 1 circuit

EC-621
EC-625
EC-629

 

EC-633

 

EC-852

Throttle position sensor circuit

2

2

EC-609
EC-673

 

EC-790

 

EC-792

 

EC-844

Accelerator pedal position sensor circuit

3

2

1

EC-775
EC-837

 

EC-840

 

EC-848

Knock sensor circuit

2

3

EC-684

Crankshaft position sensor (POS) circuit

2

2

EC-687

Camshaft position sensor (PHASE) circuit

3

2

EC-691

Vehicle speed signal circuit

2

3

3

3

EC-761

Power steering pressure sensor circuit

2

3

3

EC-767

ECM

2

2

3

3

3

3

3

3

3

3

3

EC-770
EC-772
EC-774

Intake valve timing control solenoid valve cir-
cuit

3

2

1

3

2

2

3

3

EC-585

Park/neutral position (PNP) signal circuit

3

3

3

3

3

EC-778

Refrigerant pressure sensor circuit

2

3

3

4

EC-884

Electrical load signal circuit

3

EC-864

Air  conditioner  circuit

2

2

3

3

3

3

3

3

3

3

2

HAC-4

 or 

HAC-124

ABS actuator and electric unit (control unit)

4

EC-786

 

SYMPTOM

Refer-
ence 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