Nissan Pathfinder (2008 year). Manual - part 301

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-525

< FUNCTION DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

• If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.

NOTE:
SRT can be set as “CMPLT” together with the DTC(s). Therefore, DTC check must always be carried out
prior to the state emission inspection even though the SRT indicates “CMPLT”.

SRT Service Procedure

If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review
the flowchart diagnostic sequence on the next page.

How to Display SRT Status

 WITH CONSULT-III

Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with CONSULT-III.
For items whose SRT codes are set, a “CMPLT” is displayed on the CONSULT-III screen; for items whose
SRT codes are not set, “INCMP” is displayed.
NOTE:
Though displayed on the CONSULT-III screen, “HO2S HTR” is not SRT item.

 WITH GST

Selecting Service $01 with GST (Generic Scan Tool)

*1

“How to Read DTC and 1st Trip DTC” *2

“How to Display SRT Status”

*3

“How to Set SRT Code”

PBIB2320E

EC-526

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

 NO TOOLS

A SRT code itself can not be displayed while only SRT status can be.

1.

Turn ignition switch ON and wait 20 seconds.

2.

SRT status is indicated as shown below.
• When all SRT codes are set, MIL lights up continuously.
• When any SRT codes are not set, MIL will flash periodically for 10 seconds.

How to Set SRT Code

To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.

 WITH CONSULT-III

Perform corresponding DTC Confirmation Procedure one by one based on Performance Priority in the table
on “SRT Item”.

 WITHOUT CONSULT-III

The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The
driving pattern should be performed one or more times to set all SRT codes.

PBIB2317E

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-527

< FUNCTION DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Driving Pattern

• The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driving

habits, etc.
Zone A refers to the range where the time, required for the diagnosis under normal conditions*, is the short-
est.
Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed within
zone A.

*: Normal conditions refer to the following:

PBIB3622E

EC-528

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

• Sea level
• Flat road
• Ambient air temperature: 20 - 30

°

C (68 - 86

°

F)

• Diagnosis is performed as quickly as possible under normal conditions.

Under different conditions [For example: ambient air temperature other than 20 - 30

°

C (68 - 86

°

F)], diagno-

sis may also be performed.

Pattern 1:
• The engine is started at the engine coolant temperature of 

−

10 to 35

°

C (14 to 95

°

F)

(where the voltage between the ECM terminal 73 and ground is 3.0 - 4.3V).

• The engine must be operated at idle speed until the engine coolant temperature is greater than 70

°

C

(158

°

F) (where the voltage between the ECM terminal 73 and ground is lower than 1.4V).

• The engine is started at the fuel tank temperature of warmer than 0

°

C (32

°

F) (where the voltage

between the ECM terminal 107 and ground is less than 4.1V).

Pattern 2:
• When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.

In this case, the time required for diagnosis may be extended.

Pattern 3:
• Operate vehicle following the driving pattern shown in the figure.
• Release the accelerator pedal during decelerating vehicle speed

from 90 km/h (56 MPH) to 0 km/h (0 MPH).

Pattern 4:
• The accelerator pedal must be held very steady during steady-

state driving.

• If the accelerator pedal is moved, the test must be conducted all

over again.

*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56
MPH), then release the accelerator pedal and keep it released for
more than 10 seconds. Depress the accelerator pedal until vehicle
speed is 90 km/h (56 MPH) again.
*2: Checking the vehicle speed with GST is advised.

Suggested Transmission Gear Position
Set the selector lever in the D position with the overdrive switch turned ON.

TEST VALUE AND TEST LIMIT

The following is the information specified in Service $06 of SAE J1979.
The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the
maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by On Boad Monitor ID(OBDMID), Test ID (TID), Unit and
Scaling ID and can be displayed on the GST screen.
The items of the test value and test limit will be displayed with GST screen which items are provided by the
ECM. (eg., if the bank 2 is not applied on this vehicle, only the items of the bank 1 is displayed)

PBIB2244E

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-529

< FUNCTION DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID

HO2S

01H

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

P0131

83H

0BH

Minimum sensor output voltage 
for test cycle

P0131

84H

0BH

Maximum sensor output voltage 
for test cycle

P0130

85H

0BH

Minimum sensor output voltage 
for test cycle

P0130

86H

0BH

Maximum sensor output voltage 
for test cycle

P0133

87H

04H

Response rate: Response ratio 
(Lean to Rich)

P0133

88H

04H

Response rate: Response ratio 
(Rich to Lean)

P2A00

89H

84H

The amount of shift in air fuel ratio

P2A00

8AH

84H

The amount of shift in air fuel ratio

P0130

8BH

0BH

Difference in sensor output volt-
age

P0133

8CH

83H

Response gain at the limited fre-
quency

02H

Heated oxygen sensor 2 
(Bank 1)

P0138

07H

0CH

Minimum sensor output voltage 
for test cycle

P0137

08H

0CH

Maximum sensor output voltage 
for test cycle

P0138

80H

0CH

Sensor output voltage

P0139

81H

0CH

Difference in sensor output volt-
age

03H

Heated oxygen sensor 3 
(Bank 1)

P0143

07H

0CH

Minimum sensor output voltage 
for test cycle

P0144

08H

0CH

Maximum sensor output voltage 
for test cycle

P0146

80H

0CH

Sensor output voltage

P0145

81H

0CH

Difference in sensor output volt-
age

EC-530

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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 volt-
age

P0153

8CH

83H

Response gain at the limited fre-
quency

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 volt-
age

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 volt-
age

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 out-
put voltage

P2423

84H

84H

O2 storage index in HC trap cata-
lyst

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 out-
put voltage

P2424

84H

84H

O2 storage index in HC trap cata-
lyst

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-531

< FUNCTION 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 be-
tween 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 in-
crease rate

EVAP 
SYSTEM

39H

EVAP control system leak 
(Cap Off)

P0455

80H

0CH

Difference in pressure sensor out-
put voltage before and after pull 
down

3BH

EVAP control system leak 
(Small leak)

P0442

80H

05H

Leak area index (for more than 
0.04inch)

3CH

EVAP control system
 (Very small leak)

P0456

80H

05H

Leak area index (for more than 
0.02inch)

P0456

81H

FDH

Maximum internal pressure of 
EVAP system during monitoring

3DH

Purge flow system

P0441

83H

0CH

Difference in pressure sensor out-
put voltage before and after vent 
control value 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 
current to voltage

42H

Heated oxygen sensor 2 
(Bank 1)

Low Input:P0037

High Input:P0038

80H

0CH

Converted value of Heater electric 
current to voltage

43H

Heated oxygen sensor 3 
(Bank 1)

P0043

80H

0CH

Converted value of Heater electric 
current to voltage

45H

A/F sensor 1 heater
 (Bank 2)

Low Input:P0051

High Input:P0052

81H

0BH

Converted value of Heater electric 
current to voltage

46H

Heated oxygen sensor 2 
(Bank 2)

Low Input:P0057

High Input:P0058

80H

0CH

Converted value of Heater electric 
current to voltage

47H

Heated oxygen sensor 3 
(Bank 2)

P0063

80H

0CH

Converted value of Heater electric 
current to voltage

 SEC-
OND-
ARY AIR

71H

Secondary Air system

P0411

80H

01H

Secondary Air Injection System 
Incorrect Flow Detected

Bank1: P0491
Bank2: P0492

81H

01H

Secondary Air Injection System 
Insufficient 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 
Switching Valve Stuck Open

P2440

85H

01H

Secondary Air Injection System 
Switching Valve Stuck Open

P2444

86H

01H

Secondary Air Injection System 
Pump Stuck On

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID

EC-532

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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 1000rev of the 
first cylinder

P0302

81H

24H

Misfiring counter at 1000rev of the 
second cylinder

P0303

82H

24H

Misfiring counter at 1000rev of the 
third cylinder

P0304

83H

24H

Misfiring counter at 1000rev of the 
fourth cylinder

P0305

84H

24H

Misfiring counter at 1000rev of the 
fifth cylinder

P0306

85H

24H

Misfiring counter at 1000rev of the 
sixth cylinder

P0307

86H

24H

Misfiring counter at 1000rev of the 
seventh cylinder

P0308

87H

24H

Misfiring counter at 1000rev of the 
eighth cylinder

P0300

88H

24H

Misfiring counter at 1000rev of the 
multiple cylinders

P0301

89H

24H

Misfiring counter at 200rev of the 
first cylinder

P0302

8AH

24H

Misfiring counter at 200rev of the 
second cylinder

P0303

8BH

24H

Misfiring counter at 200rev of the 
third cylinder

P0304

8CH

24H

Misfiring counter at 200rev of the 
fourth cylinder

P0305

8DH

24H

Misfiring counter at 200rev of the 
fifth cylinder

P0306

8EH

24H

Misfiring counter at 200rev of the 
fifth cylinder

P0307

8FH

24H

Misfiring counter at 200rev of the 
fifth cylinder

P0308

90H

24H

Misfiring counter at 200rev of the 
fifth cylinder

P0300

91H

24H

Misfiring counter at 1000rev of the 
single cylinder

P0300

92H

24H

Misfiring counter at 200rev of the 
single cylinder

P0300

93H

24H

Misfiring counter at 200rev 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