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Nissan Pathfinder (2009 year). Manual - part 315

EC-534

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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

2009 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-535

< FUNCTION DIAGNOSIS >

[VK56DE]

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

2009 Pathfinder

EC-536

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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

2009 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-537

< FUNCTION DIAGNOSIS >

[VK56DE]

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.

Perform “HOW TO ERASE DTC” in

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

. (The DTC in TCM

will be erased)

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

2009 Pathfinder

EC-538

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Select “SELF DIAGNOSTIC RESULT”.

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.

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.

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.

Malfunction Indicator Lamp (MIL)

INFOID:0000000003936475

DESCRIPTION

The MIL is located on the combination meter.

The MIL will illuminate when the ignition switch is turned ON
without the engine running. This is a bulb check.
If the MIL does not illuminate, check mil circuit, refer to

EC-899,

"Wiring Diagram - ENGINE CONTROL SYSTEM -"

When the engine is started, the MIL should turn off.
If the MIL remains illuminating, the on board diagnostic system
has detected an engine system malfunction.

ON BOARD DIAGNOSTIC SYSTEM FUNCTION

The on board diagnostic system has the following three functions.

SEF217U

2009 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-539

< FUNCTION DIAGNOSIS >

[VK56DE]

When there is an open circuit on MIL circuit, the ECM cannot warn the driver by illuminating MIL when there is
malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by means
of operating fail-safe function.
The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the
driver to repair the malfunction.

MIL Blinking Without DTC

When any SRT codes are not set, MIL may blink without DTC. For the details, refer to “How to Display SRT
Status” in

EC-525, "Emission-related Diagnostic Information"

HOW TO SWITCH DIAGNOSTIC TEST MODE

NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the diagnostic test mode when an accelerator pedal position sensor circuit

has a malfunction.

• ECM always returns to Diagnostic Test Mode I after the ignition switch is turned OFF.

How to Set Diagnostic Test Mode II (Self-diagnostic Results)

Check that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.

Repeat the following procedure quickly 5 times within 5 seconds.

Fully depress the accelerator pedal.

Fully release the accelerator pedal.

Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for approximately 10 seconds
until the MIL starts blinking.
NOTE:
Never release the accelerator pedal for 10 seconds if MIL starts blinking during this period. This
blinking is displaying SRT status and is continued for another 10 seconds.

Diagnostic Test
Mode

KEY and ENG.
Status

Function

Explanation of Function

Mode I

Ignition switch in
ON position

Engine stopped

BULB CHECK

This function checks the MIL bulb for damage (blown, open
circuit, etc.).
If the MIL does not illuminate, check MIL circuit.

Engine running

MALFUNCTION
WARNING

When a malfunction is detected twice in two consecutive
driving cycles (two trip detection logic), the MIL will illumi-
nate to inform the driver that a malfunction has been detect-
ed.
The following malfunctions will illuminate or blink the MIL in
the 1st trip.
• Misfire (Possible three way catalyst damage)
• One trip detection diagnoses

Mode II

Ignition switch in
ON position

Engine stopped

SELF-DIAGNOSTIC
RESULTS

This function allows DTCs and 1st trip DTCs to be read.

Engine operating condition in fail-safe mode

Engine speed will not rise more than 2,500 rpm due to the fuel cut

2009 Pathfinder

EC-540

< FUNCTION DIAGNOSIS >

[VK56DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
NOTE:
Wait until the same DTC (or 1st trip DTC) appears to completely confirm all DTCs.

How to Erase Diagnostic Test Mode II (Self-diagnostic Results)

Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to “How to Set Diagnostic Test Mode II
(Self-diagnostic Results)”.

Fully depress the accelerator pedal and keep it depressed for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM.

Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.

DIAGNOSTIC TEST MODE I — BULB CHECK

In this mode, the MIL on the combination meter should stay ON. If it remains OFF, check MIL circuit. Refer to

EC-899, "Wiring Diagram - ENGINE CONTROL SYSTEM -"

DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING

This DTC number is clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)

DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MIL does not illuminate in diagnostic test
mode I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MIL
illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are
displayed, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These uniden-
tified codes can be identified by using the CONSULT-III or GST. A DTC will be used as an example for how to
read a code.

PBIB0092E

MIL

Condition

When the malfunction is detected.

OFF

No malfunction.

2009 Pathfinder

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-541

< FUNCTION DIAGNOSIS >

[VK56DE]

A particular trouble code can be identified by the number of four-digit numeral blinks. The “zero” is indicated by
the number of ten blinks. The “A” is indicated by the number of eleven blinks. The length of time the 1,000th-
digit numeral blinks on and off is 1.2 seconds consisting of an ON (0.6-seconds) - OFF (0.6-seconds) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-seconds ON and 0.3-seconds OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-seconds OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See

EC-921, "DTC Index"

)

How to Erase Diagnostic Test Mode II (Self-diagnostic Results)

The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to “How
to Erase Diagnostic Test Mode II (Self-diagnostic Results)”.
• If the battery is disconnected, the DTC will be cleared from the backup memory within 24 hours.
• Be careful not to erase the stored memory before starting trouble diagnoses.

OBD System Operation Chart

INFOID:0000000003936476

RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS

• When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are

stored in the ECM memory.

• When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are

stored in the ECM memory, and the MIL will illuminate. For details, refer to

EC-524, "Two Trip Detection

Logic"

• The MIL will turn off after the vehicle is driven 3 times (driving pattern B) with no malfunction. A drive is

counted only when the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs
while counting, the counter will reset.

• The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A) with-

out the same malfunction recurring (except for Misfire and Fuel injection system). For Misfire and Fuel injec-
tion system, the DTC and freeze frame data will be stored until the vehicle is driven 80 times (driving pattern
C) without the same malfunction recurring. The “TIME” in “SELF DIAGNOSTIC RESULT” mode of CON-
SULT-III will count the number of times the vehicle is driven.

JMBIA1140GB

2009 Pathfinder

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