Content .. 350 351 352 353 ..

Nissan Pathfinder (2008 year). Manual - part 352

ECM

EC-933

< ECU DIAGNOSIS >

[VK56DE]

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

EC-934

< ECU DIAGNOSIS >

[VK56DE]

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 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

ECM

EC-935

< ECU DIAGNOSIS >

[VK56DE]

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 “Descrip-
tion” 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.
NOTE:
If the DTC is not for A/T related items (see

EC-919, "DTC Index"

), skip step 2.

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

EC-936

< ECU DIAGNOSIS >

[VK56DE]

ECM

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.

Perform

TM-33, "OBD-II Diagnostic Trouble Code (DTC)"

. (The DTC in TCM will be erased)

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

No Tools

NOTE:
If the DTC is not for AT related items (see

EC-919, "DTC Index"

), skip step 2.

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.

Perform

TM-33, "OBD-II Diagnostic Trouble Code (DTC)"

. (The DTC in the TCM will be erased.)

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

EC-534, "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.

ENGINE CONTROL SYSTEM SYMPTOMS

EC-937

< SYMPTOM DIAGNOSIS >

[VK56DE]

SYMPTOM DIAGNOSIS

ENGINE CONTROL SYSTEM SYMPTOMS

Symptom Matrix Chart

INFOID:0000000001538021

SYSTEM — BASIC ENGINE CONTROL SYSTEM

SYMPTOM

Refer-
ence page

HARD/NO ST

/REST

(EXCP

)

ENGINE ST

ALL

HESIT

TION/SURGING/FLA

SPOT

ARK KNOCK/DET

TION

LACK

OF POWER/

POOR

ACC

LERA

TION

HIGH IDL

/LOW

IDLE

ROUG

H IDLE/HUNTING

IDLI

NG VIBRA

ION

SLOW/NO RETURN T

IDLE

OVERHEA

S/W

TER TEMPERA

HIGH

EXCESS

IVE F

CONSUMP

EXCESS

IVE OIL CONSUMP

ION

TTER

DEAD (UNDER CHARGE)

Warranty symptom code

Fuel

Fuel pump circuit

EC-867

Fuel pressure regulator system

EC-948

Fuel injector circuit

EC-864

Evaporative emission system

EC-517

Air

Positive crankcase ventilation sys-
tem

EC-880

Incorrect idle speed adjustment

EC-492

Electric throttle control actuator

Ignition

Incorrect ignition timing adjustment

EC-492

Ignition circuit

EC-870

Main power supply and ground circuit

EC-562

EC-938

< SYMPTOM DIAGNOSIS >

[VK56DE]

ENGINE CONTROL SYSTEM SYMPTOMS

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

(continued on next page)

SYSTEM — ENGINE MECHANICAL & OTHER

Mass air flow sensor circuit

EC-585

EC-591

Engine coolant temperature sensor circuit

EC-599

EC-607

Air fuel ratio (A/F) sensor 1 circuit

Throttle position sensor circuit

Accelerator pedal position sensor circuit

Knock sensor circuit

Crankshaft position sensor (POS) circuit

EC-681

Camshaft position sensor (PHASE) circuit

EC-685

Vehicle speed signal circuit

EC-757

Power steering pressure sensor circuit

EC-763

ECM

EC-766

EC-768

Intake valve timing control solenoid valve cir-
cuit

EC-582

Park/neutral position (PNP) switch circuit

EC-773

Refrigerant pressure sensor circuit

EC-882

Electrical load signal circuit

EC-862

Air conditioner circuit

HAC-91

ABS actuator and electric unit (control unit)

EC-782

SYMPTOM

Refer-
ence page

HARD/NO S

T/RES

T (E

XCP

. HA)

GINE

ALL

HES

TION/SURGING/FLA

SPOT

ARK KNOC

/DET

LACK OF

POWER/POOR ACCELERA

TION

HIG

IDL

ROUGH IDLE/HUNTING

LING VI

BRA

ION

OW/NO RETU

OVERHEA

TER TEMPERA

URE HIG

CESSIVE

FUEL CON

UMP

ION

CESSIVE

OIL

NSUMP

ION

TTER

DEAD (UNDER CHARGE)

Warranty symptom code

ENGINE CONTROL SYSTEM SYMPTOMS

EC-939

< SYMPTOM DIAGNOSIS >

[VK56DE]

SYMPTOM

Reference
page

HARD/NO ST

T/REST

T (EXCP

HA)

HESIT

TION/S

GING/F

T SP

ARK KNOCK/DE

TION

LACK OF POWE

R/POOR

ACCELERA

TIO

HIGH IDL

IDL

ROUG

H IDLE/HU

TING

IDL

ING VIBRA

ION

SLO

/NO RETURN T

IDLE

OVERHEA

S/W

TEMPERA

URE

HIGH

EXCES

SIVE F

EL CONSUMP

ION

EXCES

SIVE OI

L CONSUMP

TTE

DEAD (UN

GE)

Warranty symptom code

Fuel

Fuel tank

FL-6

Fuel piping

FL-5

Vapor lock

—

Valve deposit

—

Poor fuel (Heavy weight gasoline,
Low octane)

—

Air

Air duct

EM-165

Air cleaner

EM-165

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

EM-165

Electric throttle control actuator

EM-165

Air leakage from intake manifold/
Collector/Gasket

EM-165

Cranking

Battery

Generator circuit

Starter circuit

Signal plate

Park/neutral position (PNP)
switch

TM-50

Engine

Cylinder head

EM-212

Cylinder head gasket

Cylinder block

EM-230

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve
mecha-
nism

Timing chain

EM-185

Camshaft

EM-202

Intake valve timing control

EC-573

Intake valve

EM-202

Exhaust valve

EC-940

< SYMPTOM DIAGNOSIS >

[VK56DE]

ENGINE CONTROL SYSTEM SYMPTOMS

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

Exhaust

Exhaust manifold/Tube/Muffler/
Gasket

EM-170

Three way catalyst

Lubrica-
tion

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

Oil level (Low)/Filthy oil

LU-24

Cooling

Radiator/Hose/Radiator filler cap

Thermostat

Water pump

Water gallery

Cooling fan

Coolant level (Low)/Contaminat-
ed coolant

CO-38

NVIS (NISSAN Vehicle Immobilizer System —
NATS)

SEC-5

SEC-97

SYMPTOM

Reference
page

HARD/NO S

T/RES

T (E

XCP

. HA)

GINE

ALL

HES

TION/SURGING/FLA

SPOT

ARK KNOC

/DET

LACK OF

POWER/POOR ACCELERA

TION

HIG

IDL

ROUGH IDLE/HUNTING

LING VI

BRA

ION

OW/NO RETU

OVERHEA

TER TEMPERA

URE HIG

CESSIVE

FUEL CON

UMP

ION

CESSIVE

OIL

NSUMP

ION

TTER

DEAD (UNDER CHARGE)

Warranty symptom code

Content .. 350 351 352 353 ..