Nissan Pathfinder (2009 year). Manual - part 311

EC-502

< BASIC INSPECTION >

[VK56DE]

INSPECTION AND ADJUSTMENT

13. If idle speed and ignition timing are not within the specifications, Idle Air Volume Learning will not be car-

ried out successfully. In this case, find the cause of the incident by referring to the DIAGNOSTIC PROCE-
DURE below.

DIAGNOSTIC PROCEDURE

If idle air volume learning cannot be performed successfully, proceed as per the following:
1.

Check that throttle valve is fully closed.

2.

Check PCV valve operation.

3.

Check that downstream of throttle valve is free from air leakage.

4.

When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident. 
It is useful to perform 

EC-557, "Inspection Procedure"

.

5.

If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform Idle Air Volume Learning again:
• Engine stalls.
• Erroneous idle.

2009 Pathfinder

ENGINE CONTROL SYSTEM

EC-503

< FUNCTION DIAGNOSIS >

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FUNCTION DIAGNOSIS

ENGINE CONTROL SYSTEM

System Diagram

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JMBIA1925GB

2009 Pathfinder

EC-504

< FUNCTION DIAGNOSIS >

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ENGINE CONTROL SYSTEM

Engine Control Component Parts Location

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1.

ECM

2.

Battery current sensor

3.

Refrigerant pressure sensor

4.

Power steering pressure sensor

5.

Intake valve timing control solenoid 
valve (bank 2)

6.

Cooling fan motor

7.

Intake valve timing control position 
sensor (bank 2)

8.

Engine coolant temperature sensor

9.

Electric throttle control actuator

10. Intake valve timing control position 

sensor (bank 1)

11.

Intake valve timing control solenoid 
valve (bank 1)

12. Camshaft position sensor (PHASE)

13. Mass air flow sensor (with intake air 

temperature sensor)

14. A/F sensor 1 (bank 1)

15. Ignition coil (with power transistor) 

and spark plug (bank 1)

16. EVAP service port 

17. Fuel injector (bank 1)

18. Knock sensor (bank 1)

19. EVAP canister purge volume control 

solenoid valve

20. Knock sensor (bank 2)

21. Fuel injector (bank 2)

22. Ignition coil (with power transistor) 

and spark plug (bank 2)

23. A/F sensor 1 (bank 2)

24. IPDM E/R

ALBIA0352ZZ

2009 Pathfinder

ENGINE CONTROL SYSTEM

EC-505

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1.

Body ground (view with air cleaner 
case removed)

2.

Body ground (view with battery re-
moved)

3.

No.1 ignition coil

4.

Engine ground

5.

Mass air flow sensor (with intake air 
temperature sensor)

6.

IPDM E/R

7.

Battery

8.

Radiator hose

9.

Camshaft position sensor (PHASE)

AWBIA0081ZZ

2009 Pathfinder

EC-506

< FUNCTION DIAGNOSIS >

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ENGINE CONTROL SYSTEM

10. Electric throttle control actuator 

(view with intake air duct removed)

11.

Electronic throttle control actuator 
harness connector (view with intake 
air duct removed)

12. Cooling fan motor harness connec-

tor

: Vehicle front

AWBIA0082ZZ

2009 Pathfinder

ENGINE CONTROL SYSTEM

EC-507

< FUNCTION DIAGNOSIS >

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1.

EVAP canister purge volume control 
solenoid valve (view with engine 
cover removed)

2.

EVAP service port 

3.

Crankshaft position sensor (POS) 
(view from under vehicle)

4.

Engine oil pan 

5.

Condenser-1

6.

Brake fluid reservoir

7.

Fuel filler pipe (top of frame view)

8.

EVAP control system pressure sen-
sor

9.

EVAP canister vent control valve

10. EVAP canister

11.

Drain filter

12. Refrigerant pressure sensor

13. Intake valve timing control position 

sensor (bank 2) (view with engine 
cover and intake air duct removed)

14. Intake valve timing control position 

sensor (bank 1) 

15. Intake valve timing control solenoid 

valve (bank 2) (view with engine cov-
er and intake air duct removed)

16. Drive belt

17. Radiator hose (view with engine cov-

er and intake air duct removed)

18

Intake valve timing control solenoid 
valve (bank 1) 

: Vehicle front

ALBIA0369ZZ

1.

Knock sensor (bank 1) (view with en-
gine removed)

2.

Knock sensor (bank 2) (view with en-
gine removed)

3.

Battery current sensor

4.

Power steering pressure sensor

5.

Intake manifold

6.

Engine coolant temperature sensor

2009 Pathfinder

EC-508

< FUNCTION DIAGNOSIS >

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ENGINE CONTROL SYSTEM

7.

Ignition coil (with power transistor) 
(bank2)

8.

Ignition coil (with power transistor) 
(bank 1)

9.

Fuel injector harness connectors 
(bank 2)

10. Fuel injector harness connectors 

(bank 1)

: Vehicle front

PBIB2710E

1.

A/F sensor 1 (bank 2)

2.

A/F sensor 1(bank 1)

3.

Heated oxygen sensor 2
(bank 1)

4.

Heated oxygen sensor 2
(bank 2)

: Vehicle front

AWBIA0083ZZ

2009 Pathfinder

ENGINE CONTROL SYSTEM

EC-509

< FUNCTION DIAGNOSIS >

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1.

ASCD steering switch

2.

MAIN switch

3.

CANCEL switch

4.

SET/COAST switch

5.

RESUME/ACCELERATE switch

6.

ECM harness connectors (view with 
ECM cover removed)

7.

Coolant reservoir

8.

Accelerator pedal position sensor

9.

Fuel level sensor unit and fuel pump 
harness connector (view with fuel 
tank removed)

AWBIA0084ZZ

2009 Pathfinder